Home Audio FAQ

This is the PMC FAQ containing information that relates to home audio and custom install products. Please browse the list and see if your question has been answered.

I think my drive unit bolts may be loose. How tight should they be? Is there a torque setting?

You should not overtighten the fixings of the drive units as it can distort the chassis or damage the bolt’s thread.
The best solution is use a torque wrench using the following settings in Nm:

Where to get 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.

Can I upgrade my speakers?

We offer upgrades if we discover ways to significantly improve existing products. The latest enhancements are available here

Can I mount my PMC speakers on the wall?

DB1 Gold, twotwo5/6, result6, and the ci series have mounting points on the rear panel so they can be used with the BRKT, a PMC bracket that can be purchased as an option. This will allow for ideal positioning. See: https://pmc-speakers.com/products/consumer/hifi-accessories

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.

What speaker cable should I use?

PMC recommend using a high quality thick 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.

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 standard formulas, as with sealed and ported designs.

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 12dB per octave roll off after the resonant frequency, while a vented box has a 24dB 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.

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.


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