PMC twenty-21 User Manual
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PMC twenty-21 User Manual

Twenty series
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  • Page 1 series user guide Hand built by Date...
  • Page 3 Warranty Certificate Please take a few moments to complete the warranty card at the back of this booklet or register at www.pmc-speakers.com (click on ‘register a product’). This records the purchase of your loudspeakers and provides you, the customer an opportunity to make suggestions and provide feedback directly to PMC.
  • Page 4 Our unswerving passion for getting it right has made this goal possible. Thank you for choosing PMC products. It is now time for you to read the user guide, install your new twenty series speakers, and realise just how much you’ve been missing.
  • Page 5 Congratulations - You have joined the elite PMC: the authority for quality sound. Prince Over two decades PMC has earned an UNIVERSAL MUSIC GROUP unrivalled reputation for creating the world’s finest professional loudspeakers. Robbie Williams Stevie Wonder Simply put, our loudspeakers provide a reference for the world’s highest profile...

  • Page 6: User Guide

    Contents General usage guidelines PMC’s - Basically speaking Advanced Transmission Line - Technically speaking Advanced Transmission Line Our meticulous attention to detail Unpacking Resonance absorbing plinth installation guide Compact loudspeaker set up Connections Connecting to an amplifier twenty.21, 23, 24 & C Connecting to an amplifier twenty.26...

  • Page 7: General Usage Guidelines

    PMC has made efforts to provide accurate installation information and good quality fixings. PMC LTD will not be held responsible or liable for injuries or property damage - direct, indirect or consequential - arising out of use or inability to use this product safely and properly.
  • Page 8 PMC’s designs everyday to create much of the music and sound you hear. You can rest assured that what you hear from a PMC speaker is identical to the version approved by the artist themselves. • cross section...

  • Page 9: Technically Speaking

    A PMC transmission line design utilises frequencies. The result is PMC’s characteristic sophisticated cabinet construction, transparent midrange and fast, attacking...

  • Page 10: Our Meticulous Attention To Detail

    Our meticulous attention to detail All PMC loudspeakers are hand-built in the U.K. using individual components that are matched to our reference model; this includes the structural integrity of every cabinet and the testing and recording of each component. This guarantees it will be within our strict tolerances and ensures your purchase sounds identical to the original design.
  • Page 11 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 or returned for servicing. 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.
  • Page 12 Resonance absorbing plinth installation guide for floorstanding models Resonance damping plinths and spikes enhance the performance and stability of the floorstanding models in the range. The plinths attach to the base of each speaker using M8 bolts. The twenty series spikes are reversible, with spike or ball tips for use on either carpeted or more sensitive hard flooring.

  • Page 13: Compact Loudspeaker Set Up

    Compact loudspeaker set up The compact twenty series models are designed to offer exceptional clarity while taking up minimal space, either on stands or within audio/video furniture. They will realise their optimum performance when used in conjunction with their dedicated high-mass stand that positions them at the ideal height with stability.
  • Page 14 Connections Caution To avoid potential damage, please ensure that your power amplifier(s) or receiver is turned off before connecting or disconnecting your loudspeakers. Cable & connectors When selecting cables for use with your twenty series loudspeakers, ensure that their construction is of a high enough standard to withstand the rigors of everyday use and that they are suitably terminated.

  • Page 15: Connecting To An Amplifier

    Connecting to an amplifier Standard / Single wiring connection This is the most common, using a single cable with two conductors. Connect using any of the two pairs of RED+/BLACK- terminals. Ensuring the twenty series terminals and gold linking bars are secure and the binding posts are finger tight.
  • Page 16 Connecting to an amplifier Standard / Single wiring connection Connect using any of the three pairs of RED+/BLACK- terminals. Ensure the linking bars are secure and the binding posts are finger tight. Advanced connection / Bi-wiring & Bi-amping The twenty.26 can also be bi-wired, bi-amped, tri-wired or tri-amplified. By loosening all six rear binding posts, the linking bars can be removed so separate signals can be fed to the LF (Woofer), MF (50mm Dome) and HF (Tweeter) drivers.
  • Page 17 Running in 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’...
  • Page 18 Advanced Transmission Line design, wide dispersion, ultra Advanced Transmission Line 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.
  • Page 19 Positioning • 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. See stereo set up diagram • Ensure that stereo pairs of loudspeakers are equidistant from the listening position.

  • Page 20: Fine Tuning For Perfect Bass

    Fine tuning for perfect bass Bass / LF (Low Frequency adjustment) 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 to them, especially in the low frequency (bass) region.

  • Page 21: Stereo Set Up

    Stereo set up...

  • Page 22: Surround Sound Specific Set Up

    Surround sound specific set up 5.1 Systems The twenty series has been designed for perfect multi channel music or movie playback and the following diagrams display the ideal layout for the speakers. No doubt the constraints of room size and shape will vary the distances from the listener to the speakers.
  • Page 23 Ideal 5.1 surround set up...

  • Page 24: Ideal 7.1 Surround Sound Set Up

    Ideal 7.1 surround sound set up...
  • Page 25 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 ‘where to buy’.

  • Page 26: Specifications

    Recommended amp power 30 - 150W Effective ATL™ 1.72m (5.6ft) Impedance 8 Ohm Drive units LF PMC twenty series, Lightweight doped 5.5”/140mm cone with cast alloy chassis HF PMC/SEAS®, 27mm twenty series, SONOLEX™ Soft dome, Ferrofluid cooled Crossover freq 1.8kHz Input connectors...
  • Page 27 30 - 150W Effective ATL™ 2.4m (7.8ft) Impedance 8 Ohm Drive units LF PMC twenty series, Lightweight doped 5.5” / 140mm cone with cast alloy chassis HF PMC/SEAS®, 27mm twenty series, SONOLEX™ Soft dome, Ferrofluid cooled Crossover freq 1.8kHz Input connectors...
  • Page 28 30 - 200W Effective ATL™ 1.8m (5.9ft) Impedance 6 Ohm Drive units LF 2 x PMC twenty series, Lightweight doped 5.5” / 140mm cone with cast alloy chassis HF PMC/SEAS®, 27mm twenty series, SONOLEX™ Soft dome, Ferrofluid cooled Crossover freq 1.8kHz...

  • Page 29: Warranty On-Line

    Warranty on-line SIMPLY ACTIVATE YOUR 20 YEAR WARRANTY ON-LINE GO TO WWW.PMC-SPEAKERS.COM AND CLICK ON REGISTER PRODUCT WARRANTY ON-LINE If you do not have access to the internet fill in the warranty form found on pages 31 & 32 and post it to us.
  • Page 30 Do not return a product to PMC without firstly contacting our technical dept. If the product must be returned for service you will be issued with a Returns Authorisation number. If a product is returned to PMC and subsequently is found to have no fault or a non-warranty fault it will be subject to a minimum of £50.00 plus the carriage for its return.

  • Page 31: Help Us Improve

    WARRANTY CERTIFICATE - PART 2 Our Copy Please complete and return this section - or simply complete the on-line registration at www.pmc-speakers.com and click on register product. Product Serial Nos Date of purchase Purchased from Your Name Your email address...
  • Page 32 We value all our client’s comments. Please take a moment to help us improve: Please tell us how your new PMC’s perform. Your comments may appear on the customer quotes section for this product on our site. N.B. Don’t worry the comments will be anonymous;...

  • Page 33: Inspection Certificate

    Inspection certificate Every component that appears in a PMC product is measured, tested, matched and recorded by hand. This analysis also applies to the final product we build to ensure you receive an identical replica of the reference model. Crossover matching Enclosure finish Assembly &...
  • Page 34 This document should not be construed as a commitment on the part of The Professional Monitor Company Limited (PMC). The information it contains is subject to change without notice. PMC assumes no responsibility for errors that may appear within this document. Information subject to change.
  • Page 36 T + 44 (0) 870 444 1044 E sales@pmc-speakers.com W www.pmc-speakers.com Ref No. 100 v5 03/14...

This manual is also suitable for:

Twenty-22Twenty-23Twenty-26Twenty cTwenty-24

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