Online contact

Sales (Europe)
sales@promonitor.co.uk

Services
sales@promonitor.co.uk

Webmaster
sam@promonitor.co.uk

Frequently Asked Questions

Consumer FAQ

1. What speaker should I choose?
2. What amplifiers do we recommend?
3. Where can I demo and purchase the speakers?
4. What is the difference between passive and active speakers?
5. What is the difference between the Studio ‘S” version of PMC speakers and the domestic veneered versions?
6. How do transmissions lines differ from ported and vented speakers?
6. Why are transmission lines not used by all speaker manufacturers?
7. What is Bi & Tri Wiring?
8. What speaker cable should I use?
9. Where should I position my speakers?
10. Can I mount my PMC speakers on the wall?
11. Can I upgrade my Speakers?
12. How important are speaker spikes and decoupling?
13. How can I get replacement parts for my speakers? And at what cost?
14. What is TT Technology™?
15. What is Stealth Baffle™?
16. What is H-Line ATL™ Technology?
16. How to wall Mount the wafer on wall loudspeakers.
17.Suggested associate speakers
18. Wafer installation examples
19. In wall/ceiling installation instructions
20. In wall Diagrams
21. Unpacking
22. Plinth Installation for GB1i, FB1i, OB1i
23. Connections
24. Connection of DB1i, TB2i, GB1i, FB1i
25. Connection of OB1i & CB6i
26. Running or breaking in
27. Magnetic Shielding
28. Stands and Brackets
29. Positioning
30. Surround sound specific set up - 5.1 Systems
31. Surround sound specific set up - 7.1 Systems
32. Fine tuning for perfect bass
33. Suggested Associate Loudspeakers
34. Service
35. Can my PMC product be upgraded to the i series?

Professional FAQ

1. What speaker should I choose?
2. What amplifiers do we recommend?
3. Where can I demo and purchase the speakers?
4. What is the difference between passive and active speakers?
5. What is the difference between the Studio ‘S” version of PMC speakers and the domestic veneered versions?
6. How do transmissions lines differ from ported and vented speakers?
7. Why are transmission lines not used by all speaker manufacturers?
8. What speaker cable should I use?
9. Positioning
10. Surround sound specific set up - 5.1 Systems
11. Surround sound specific set up - 7.1 Systems

Consumer FAQ - Answers

1. What speaker should I choose?
To choose a speaker, you should consider the following:

• How big is my listening area?

• How loud do you listen to your music?

The choice of speaker will always be down to your own personal preferences, whether you listen to your music loud or quiet, or have a room large or small, PMC accommodates for all needs though its extensive consumer range of bookshelf, stand mount and floor standing monitors.

One important factor to consider is that generally small speakers sound better in smaller rooms, are larger speakers sound better in larger rooms. A small room will have higher resonant frequencies, and the bigger the speaker, the more energy will be produced around the room’s resonant frequencies, which can produce an unpleasant overblown bass. Whereas a smaller speaker such as a GB1 or TB2 will not produce the same low end energy, and will sound far more controlled in a smaller room.

If you have a larger room available smaller speakers will still work well, but a larger speaker will have a more extended frequency response and because a larger room has lower resonant frequencies, it is unlikely to be upset by a larger speaker.

These are only guidelines. The best way to select a speaker is to listen to it, preferably in your own listening room if possible and decide for yourself. If you think a speaker sound good, it sounds good, whether it abides by the above guidelines or not.
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2. What amplifiers do we recommend?
At PMC we use Bryston amplifiers for who we are the UK supplier. As our speakers have been developed using their amplifiers and visa-versa, the combinations offers good synergy and excellent results, and we would recommend you audition Bryston amplifiers with our speakers if possible.

The ideal amplifier should have enough power in reserve to reproduce powerful transients present in many forms of music. It is easier to damage a loudspeaker with a low powered amplifier driven too hard and producing a distorted signal than with a high power amplifier with plenty of power in reserve. Please consult your dealer if in doubt.
www.bryston.ca
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3. Where can I demo and purchase the speakers?
Consumer:

If you are in the UK please follow the link bellow, and click on your county from the list to locate your nearest dealer.

UK_Distribution

If you are in the USA, please follow the link below a click on your state from the list to locate your nearest dealer.

USA_Distribution

If you are in Europe, please follow the link below, and click on your country from the list to locate your PMC distributor. They will be able to assist you in finding your nearest dealer.

EU_Distribution

If you are in Asia, please follow the link below, and click on your country from the list to locate your PMC distributor. They will be able to assist you in finding your nearest dealer.

Asia_Distribution

If you are in Australia, please follow the link below, and click on your country from the list to locate your PMC distributor. They will be able to assist you in finding your nearest dealer.

Australia_Distribution

If you are in Canada, please follow the link below, and click on your country from the list to locate your PMC distributor. They will be able to assist you in finding your nearest dealer.

Canada_Distribution

If you are in South America please follow the link below, and click on your country from the list to locate your PMC Distributor. They will be able to assist you in finding your nearest dealer.

SouthAmerica_Distribution

For Africa, and any other country not on the PMC website, please contact PMC at sam@promonitor.co.uk


Professional :

If you are in the UK please contact sales@promonitor.co.uk , and they will be able to arrange a demo with your nearest dealer.

If you are in the USA, please contact sales@pmc-speakers.us , and they will be able to arrange a demo with your nearest dealer.

If you are in Europe, please follow the link below, and click on your country from the list to locate your PMC distributor. They will be able to assist you in finding your nearest dealer.
EU_ProDistribution

If you are in Asia, please follow the link below, and click on your country from the list to locate your PMC distributor. They will be able to assist you in finding your nearest dealer.

Asia_ProDistribution

If you are in Australia, please follow the link below, and click on your country from the list to locate your PMC distributor. They will be able to assist you in finding your nearest dealer.

Australia_ProDistribution

If you are in Canada, please follow the link below, and click on your country from the list to locate your PMC distributor. They will be able to assist you in finding your nearest dealer.
Canada_ProDistribution

For Africa, South America and any other country not on the PMC website, please contact PMC at sam@promonitor.co.uk

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4. What is the difference between passive and active speakers?
Passive speakers have a non-powered crossover between the power amp and the drive units, whereas an active speaker has a powered crossover between the preamp and power-amp. This means that a single stereo amplifier can control a two or three way speaker pair, while an active design requires one channel of amplification per drive unit. So a two way active design would require 2 stereo amplifiers and a three way active design would require 3 stereo amplifiers to power the speaker pair. PMC active designs are given the ‘A” suffix in the name e.g. BB5-A.

Activated speakers use passive crossovers, but have a separate amplifier for each speaker. This eliminates cross-talk between the channels giving a clearer sound. The DB1S-A and TB2S-A are both activated designs.

To view the active range please follow this link:

Active Range

To view the passive range, please follow this link:

Pro: Pro Passive Range

Consumer: Consumer Passive Range

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5. What is the difference between the Studio ‘S” version of PMC speakers and the domestic veneered versions?
The studio version’s are exclusively for professional customers as the matt black paint finish is very hard wearing and robust, which is ideal for vigorous use in a studio like environment.

Please view the image below for finishes
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6. How do transmissions lines differ from ported and vented speakers?
Transmission line, ported and vented designs are three different concepts on how to load the bass driver in a speaker enclosure. Transmission lines and sealed boxes have a 6dB per octave roll off after the resonant frequency, while a vented box has a 24bB per octave roll off. Ported speaker are the most common as they are cheap to build and easy to design, though the quality of the bass reproduction is questionable in many designs and such a steep roll off can have knock on problems further up the frequency range.

Sealed boxes have a similar roll off to transmission lines, yet can suffer from an ‘oil can” effect due to high pressures behind the bass cone, interrupting its movement. Both sealed and vented designs can suffer from rear radiating sound bouncing off the cabinet walls, and passing through the bass driver causing what can be described as a boxy sound.

Transmission line by contrast sound very natural because there is no build up of pressure behind the bass cone, with the rear radiating air being forced through an internal labyrinth to reinforce the bottom end of the frequency band. This also means no rear sound is re-radiated through the bass driver. The other advantage is that the air in the transmission line loads the bass driver and lowers its resonant frequency. This allows for the extended low end response and keeps the bass driver well damped, requiring less excursion than sealed or ported speakers to produce the same output.

PMC has painstakingly developed their own advanced transmission Line (ATL™) and has taken loudspeaker design to new levels, by using a cabinet construction and highly specified drive unit and crossover components. The PMC ATL™ design has enormous benefits including Improved resolution & reduced distortion, Even frequency response and Deeper, faster and better defined bass.

For more information about PMC’s Advanced transmission Line technology
ATL™ Technology
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6. Why are transmission lines not used by all speaker manufacturers?
They are expensive to build due to the labyrinth design within the cabinet and only a few speaker designers have a sufficient understanding in order to produce competent designs. Unfortunately there is no magic formula’s, as with sealed and ported designs.
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7. What is Bi & Tri Wiring?
All passive PMC speakers can be either bi-wired or tri-wired. Bi-wiring is the use of two runs of speaker cable per channel between the amplifier and speaker. Tri-wiring is similarly the use of three runs of speaker cable per channel, but you will require a three way loudspeaker and three rear pairs of terminals per speaker to achieve this. Some people advocate that separating the signal paths aids the retrieval of fine detail. However, the evidence is far from conclusive. If you intend to bi-wire your two way speakers, or tri-wire your three way speakers ensure the metal links on the back-panel have been removed. If you wish to bi-wire our three way speakers, so the tweeters and mids are served by one set of cables and the woofers by a separate set of cables, remove the bottom link, but retain the top one.
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8. What speaker cable should I use?
PMC recommend using a high quality think multi-strand Oxygen Free Copper (OFC) cable between the amplifier and speakers. The use of ‘exotic” cables has limited improvement on sound quality, so we would not advocate spending great quantities of money. However, if you are prepared to spend a great deal of money in this area, we would strongly advice you listen first to determine whether the outlay is worth the improvement.
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9. Where should I position my speakers?
Because out unique ATL advanced transmission line enclosures, wide dispersion pattern, low harmonic distoring and smooth roll-off, PMC loudspeakers are more forgiving of difficult room conditions and placement constraints than conventional designs. However we encourage you to spend some time experimenting in your own room in order to obtain the best results within any applicable architectural influence upon system performance, especially in the low frequency region.

The following guidelines are suggestions for the initial location of you monitors.

Fine tuning of the positioning can start from here.

Place the speakers so that the front face is forward of any object that protrudes into the room – a fire place, bookcase or television for example.

Ensure that stereo pairs of loudspeakers are equidistant from the listening position, although some arrival time differences can be accommodated within modern home theatre receivers and processors.

It is always best to position front left/right pair and centre channel loudspeakers, at the same height, usually that of ones ear level when seated at the primary listening position.

When calculating the distance between your left/right speakers, create an imaginary equilateral triangle between them and your listening position.
For example, if you are seated 3meters from the plane of your left/right loudspeakers, they should be positioned roughly 2metres apart. As a general rule, the soundstage width will diminish if the loudspeakers are any closer together and become disjointed if they are further apart, but we encourage experimentation within your own room.

Loudspeakers can be ‘toed-in” to improve stereo left/right imaging, so that the axis of each loudspeaker crossed approximately 50cm behind the primary listening position.

Any of the PMC range can be used as surround (side or rear) loudspeakers in a multichannel music or movie playback system, placed just behind and elevated approximately 1meter above ear-height when seated in the primary listening position.

For our Home theatre range please follow the link below:

Home Theatre Range

For out Custom Installation range please follow the link below
Custom Installation

For out Custom Installation range please follow the link below
http://www.pmc-speakers.com/productCats.php?mode=productCats&cid=7
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10. Can I mount my PMC speakers on the wall?
DB1+’s have mounting points on the back for use with a PMC bracket that can be bought separately. The bracket allows multidirectional rotation for easy set-up.

To view the DB1+ wall bracket please follow the link below:
DB1+ wall bracket

The Wafer series speakers come with a wall bracket and are intended for wall mounting.

For the wafer series please follow the link below:
wafer series

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11. Can I upgrade my Speakers?
If you own a DB1, TB2 or an FB1, they can be upgraded to a DB1+, TB2+ and FB1+ standard respectively. This modification can be performed by a dealer or by PMC.

Customer DIY upgrades to PMC speakers are strongly discouraged as not only will this invalidate the warranty, it may very likely make your speakers sound worse. Designing PMC speakers takes skilled R&D engineers a great deal of time with the best equipment at their disposal taking all factors into account. Judiciously replacing components can upset the balance of a carefully designed speaker.

For additional information please contact andy@promonitor.co.uk
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12. How important are speaker spikes and decoupling?
In an ideal world the speaker would be decoupled from the room using a slab of dense material such as concrete or marble, which is in turn decoupled from the slab using spikes or bluetack. However, in the real world this is hard to achieve, and will have limited effect on the sound quality unless a considerable amount of money has been spent on the system and the room acoustics are good.
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13. How can I get replacement parts for my speakers? And at what cost?
For any replacement parts, costs and logistics please contact your nearest dealer
Distribution and Dealers
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14. What is TT Technology™?

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15. What is Stealth Baffle™?

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16. What is H-Line ATL™ Technology?

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16. How to wall Mount the wafer on wall loudspeakers.

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17.Suggested associate speakers

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18. Wafer installation examples

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19. In wall/ceiling installation instructions

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20. In wall Diagrams

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21. Unpacking
Please retain your packaging for future use as all PMC cartons are durable, reusable and can be employed to safely transport your loudspeakers should they be relocated. Much of the packing is constructed from recyclable materials, so if you are to dispose of it please do so in an environmentally friendly manner. Packing materials can pose danger to animals, the young and vulnerable. Ensure these items are kept or disposed of safely
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22. Plinth Installation for GB1i, FB1i, OB1i
Plinth installation for GB1i, FB1i & OB1i Plinths are used to enhance the performance and stability of the floorstanding models in the range. They attach to the base of each speaker using M8 bolts and accommodate the supplied spikes for use on carpeted surfaces. Plinths should be installed as follows: Carefully invert the loudspeaker so that its base is uppermost. Take care not to damage the top of the loudspeaker when it is upside-down, the use of a soft cloth or square of carpet is suggested. Position the plinth on the bottom of the loudspeaker so that its large curved edge is to the front (same face as the drive units) and the metal inserts are facing up towards you. Ensure that the corresponding inserts in the base of the cabinet are aligned with the rebated holes in the plinth. Locate the large M8 bolts and tighten them gently by hand, then using the supplied Allen key. Ensure that the bolts are not over-tightened. Fully thread each spike with one of the supplied lock nuts. The spikes can then be attached to the plinth; they should point upwards whilst the cabinet is inverted. Caution: the spikes are sharp and should be treated with great care and may damage hard flooring if in direct contact. Re-invert the loudspeaker so that the spikes and plinth are at the bottom. Once in position, level the loudspeaker by adjusting each spike in turn. While this might seem a time-consuming exercise, it is important both in terms of system performance and the stability of the cabinet. The final step is to tighten each spike’s lock nut; this will ensure that the spike and loudspeaker are as rigid as possible.
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23. Connections
Caution To avoid potential damage, please ensure that your power amplifier(s) or receiver is turned off before making or breaking any loudspeaker connections. Cable & connectors­ When selecting cables for use with your PMC loudspeakers, ensure that their construction is of a high enough standard to withstand the rigors of everyday use and that they are suitably terminated. While bare wire can be accommodated by the binding posts, we recommend the use of either spade lugs or 4mm ‘banana” plugs in order to maintain an electrical connection of the highest integrity and avoid the possibility of short circuits. Please consult your dealer for more information regarding cable lengths and termination options. Polarity + & - It is of vital importance to observe the polarity markings and maintain positive-to-positive and negative-to-negative connections from amplifier or receiver to the loudspeaker. The terminals are colour-coded to aid in their identification, positive terminals are red, negative terminals are black.
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24. Connection of DB1i, TB2i, GB1i, FB1i
Standard connection - A single cable with two conductors Connect using any of the two pairs of RED+/BLACK- terminals. Ensuring the gold linking bars are secure and the binding posts are finger tight. Advanced connection The DB1i, TB2i, GB1i, FB1i can be bi-wired or bi-amplified. By loosening all four rear binding posts, the angled bridging plates can be removed thus enabling separate signals to be fed to the low (Woofer) and high frequency (Tweeter) drivers. Ensure the binding posts are re-tightened after the bridging bars are removed. Both bi-wiring and bi-amping require the use of two lengths of cable per speaker. Bi-amping requires two separate amplifiers; one for each driver. Please consult your dealer regarding the benefits and the correct procedure. Terminal identification Top pair of terminals – HF / High Frequency / Tweeter Bottom pair of terminals – LF / Bass Frequency / Woofer
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25. Connection of OB1i & CB6i
Standard connection - A single cable with two conductors Connect using any of the three pairs of RED+/BLACK- terminals. Ensuring the gold linking bars are secure and the binding posts are finger tight. Advanced connection The OB1i and CB6i can be bi-wired, bi-amplified, tri-wired or tri-amplified. By loosening all six rear binding posts, the angled bridging plates can be removing thus enabling separate signals to be fed to the low (Woofer), mid (75mm Dome) and high frequency (Tweeter) drivers. Ensure the binding posts are re-tightened after the bridging bars are removed. Both bi-wiring and bi-amping require the use of two lengths of cable per speaker, tri-wiring and tri-amping require three lengths per speaker. Bi-amping also requires two separate amplifiers; tri-amping requires three, one for each driver. Please consult your dealer regarding the benefits and the correct procedure. Terminal identification Top pair of terminals - HF / High Frequency / Tweeter Middle pair of terminals - MF / Mid Frequency / 75mm Dome Bottom pair of terminals - LF / Bass Frequency / Woofer (The CB6i terminal plate is at 90 ° to those illustrated here. The LF terminals on the far right)
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26. Running or breaking in
When loudspeakers are new they will take time to reach their ­­­­­­full potential. It is often debated whether any solid-state equipment, such as CD players or transistor-based power amplifiers change with use, but the characteristics of mechanical devices such as loudspeakers do alter and improve their performance significantly after a short ‘running in” period. The science is simple; as the soft material surrounding the dome or woofer cone is flexed it will eventually reach a point where it has optimum compliancy allowing the drive unit to move more freely. This translates to greater accuracy and speed of attack in the bass region and the mid and high frequency produces a far more vivid audio picture. This short ‘running in” period takes approximately 15 hours of normal use.
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27. Magnetic Shielding
Loudspeakers contain magnets. The magnetic shielding option is ideal for those with CRT (tube style) televisions or when other sensitive items are close by. Shielded models are denoted by the “M” suffix and can be positioned adjacent to magnetically sensitive devices without negative effect. We still recommend that valuable, magnetically sensitive items such as tapes are not left in close proximity for extended periods of time. If your loudspeakers are not magnetically shielded, please ensure that they are positioned at least 1metre away from items that could be damaged by stray magnetic fields. Conventional glass tube (CRT) televisions and computer monitors together with media such as floppy discs, cassettes and videotapes are particularly susceptible. If you have any queries contact your dealer for further advice regarding positioning or upgrading to a shielded version.
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28. Stands and Brackets
The PMC Tube 104™ high-mass stand have been specifically designed and pre-tuned to guarantee maximum performance from the compact models in the . Tailor made mounting brackets are available from your PMC dealer, they affix to the DB1i with four 6mm bolts on the rear panel. The DB1i wall brackets can be angled precisely and rigidly in both the horizontal and vertical planes again ensuring maximum performance. For more information about PMC stands and brackets please contact your dealer or go to the stands and brackets section on the website - click here

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29. Positioning
With their unique ATL™ Advanced Transmission Line design, wide dispersion, ultra low distortion and smooth bass roll-off, PMC loudspeakers are more forgiving of difficult room conditions and placement constraints than conventional designs - you will be able to achieve a superb sound throughout the room with little effort. We do encourage you to spend some time experimenting in your own room in order to achieve the very best results. Remembering that small changes in location can often influence system performance. Room shape, size, construction and interior decoration vary immensely and therefore influence sound in different ways. The following guidelines are suggestions for the starting point to locate your new speakers. Fine-tuning of their positioning can start from here. • Place the speaker so the front face is slightly forward of any large object that protrudes into the room - this could be a fireplace, bookcase or television for example. Tip See stereo set up diagram • Ensure that stereo pairs of loudspeakers are equidistant from the listening position. Tip Some arrival time differences can be accommodated within modern home theatre receivers and processors (see the instruction manuals provided with such equipment for more on time alignment). • It is best to position the front left/right pair (and centre channel loudspeaker if you have a surround system) at the same height, usually at ear-level when seated at the listening position. Tip If any of the speakers are mounted above or below, then angle the speaker towards the listening position. • The distance between your left/right speakers and the listening position should ideally create an equilateral triangle. As a general rule, the width of the audio picture will be narrow if the speakers are too close together. If they are too far apart the picture will be wide but there will be less central definition Tip Use a well recorded vocal track to judge the ideal spot. • To further enhance the audio picture or soundstage the speakers can be angled/toed-in”. Start with the speakers angled so they will cross approximately 50cm (2ft) behind the listening position. (See stereo set-up diagram) Varying this angle will also subtly affect the vividness of the audio picture, so again experiment. Tip A simple well recorded band with vivid vocals will help to achieve the best position.

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30. Surround sound specific set up - 5.1 Systems
The has been designed for perfect multi channel music or movie playback and the following diagrams display the ideal layout for the speakers. Tip No doubt the constraints of room size and shape will vary the distances from the listener to the speakers. Therefore use of the time alignment function of your surround processor will be important. Tip There are specific horizontal centre channels to match the main channels (i.e. DB1M-Ci, TB2M-Ci, CB6i) and the slim line wafer™ series of in and on wall models that will combine perfectly. Tip The guidance given in the ‘Stereo set up and ‘Fine tuning for perfect bass” also apply to the set up of a surround system.
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31. Surround sound specific set up - 7.1 Systems
In a system capable of full 7.1 Dolby® Digital Surround EX™, DTS® ES™, Blu-ray™ or HD DVD™ playback there will be two sets of surround speakers. The first pair should be positioned at 100° and the second set at 150°. (The centre is considered 0° while directly to the rear of the room is 180°). See Ideal 7.1 surround set up diagram. Dolby® Digital Surround EX™ is a registered trademark of Dolby® Laboratories DTS® ES™ are registered trademark of DTS®, Inc Blu-ray™ is a trademark of the Blu-ray™ Disc Association HD DVD™ is a trademark of the DVD Format/Logo Licensing Corporation (DVD FLLC)
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32. Fine tuning for perfect bass
Solid boundaries (i.e. walls, ceilings and floors) reflect sound and help to contain it within a room. They make a speaker sound louder the closer they are from them, especially in the low frequency (bass) region. This diagram shows the areas, that if a speaker is positioned, will either increase or decrease bass - The darker the shading the more bass will be heard. Placing the speakers in the corners will generate the most bass, and in the centre of the room, the least bass. Tip Position your speakers so the bass is clear and defined on all styles of music - remembering that more bass isn”t necessarily better. Tip Putting surround speakers and subwoofers near walls, ceilings and floors will also increase bass.

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33. Suggested Associate Loudspeakers
PMC manufacture a large selection of loudspeakers and sub-woofers to meet a range of budgets and uses, from compact, audiophile designs to large studio monitors. The following products make ideal companions to create an unbeatable surround system or for supreme audio throughout the home.
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34. Service
We are confident your loudspeakers will afford many years of trouble-free listening of the highest order. B­­ut in the unlikely event that one or more requires repair, our unique manufacturing procedure, wherein the precise value of each component together with the response of the system as a whole is recorded, will ensure that any replaced parts will exactly match the performance of those originally included within each individual loudspeaker. For any issues that might arise or for advice and service requirements, the primary point of contact should be your knowledgeable and authorised PMC dealer/distributor. If you do not have a local representative please see www.pmc-speakers.com and click on distribution.
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35. Can my PMC product be upgraded to the i series?
The new I series has been considerably re-engineered from our plus series and although the physical styling is similar the construction and internal parts are quite different. This means that it is not possible to offer an “upgrade” path from existing +Plus Series to the new “I Series”. The new “I Series” consists of a new higher density medite™ carcass which has been remodelled internally to accept the new HF and LF drivers. The fixing positions for the drivers and internal rebate cut outs are different from the older “+Plus Series” and these older carcasses cannot be modified. The above coupled to the cosmetic changes to the new “I Series” such as Hand polished enamel badges and revised high gloss plinths on certain models mean that we would not offer “partial” upgrades to older “+Plus Series”. This would lead to confusion amongst our client base as to what actual specification a model might be . It may be possible for you to achieve a satisfactory part exchange deal through your local PMC agent/dealer, especially if your purchase of the “+Plus” series is recent ( less than 2 months). If you would like a list of dealers and agents then please refer to our web site at http://www.pmc-speakers.com/distribution/distribution.php?mode=viewcountry&id=uk
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Professional FAQ - Answers



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