PMC Twenty.21 Speakers - Walnut (Discontinued)

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PMC Twenty.21 Speakers - Walnut (Discontinued) by PMC Speakers

PMC Twenty.21 Speakers - Walnut (Discontinued)
by PMC Speakers

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Product Code:
Twenty.21 Speakers
PMC Twenty.21 Speakers - Walnut
  • Description
  • Features
  • Track Listing
  • Specifications
  • Reviews
  • Set Up Instructions
  • Dimensions
  • More Info
  • About ATL
  • Why Buy?
  • Includes
  • Tonearm
  • Industry Reviews
  • Glossary
Hi-Fi Outstanding Product Audio Excellence Award Hi-Fi World Made in England

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Have a question about this product? Please email our audio advisor or call 1-877-929-8729 with any questions or concerns regarding your equipment purchase.

Due to its complex ATL the twenty21 has significantly more dynamic grip and depth of bass than any other speaker of this size.

It is a very effective musical communicator, with fine warmth through the mid range and a sweet and extended treble. It all adds up to a dynamite design, capable of dominating the compact loudspeaker market by reproducing all genres of music with ease.

Twenty.61 Speaker Stand sold separately

Buy with confidence! 365 day upgrade plan included. Click here to learn more.

Crossover Frequency: 1.8kHz
Dimensions: H 12.8 W 6.0 D 11.0 (+6mm grille)
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
Effective ATL Length: 1.72m / 5.6ft
Frequency Response: 50Hz 25kHz
Impedance: 8Ohm
Input Connectors: 2 pairs 4mm sockets (Bi-amp or Bi-wire)
Sensitivity: 87dB 1w 1m
Weight: 11 lbs

Customer Reviews for PMC Twenty.21 Speakers - Walnut (Discontinued)


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Click here to read the PMC Twenty.21 Brochure: Twenty.21 Brochure
Technically speaking

PMCs unique (Advanced Transmission Line) enclosures have taken loudspeaker design to the highest level, using sophisticated cabinet construction, proprietary drive units, and patented absorption materials and techniques. The benefits are enormous compared to the relatively simple sealed and ported designs currently available elsewhere.

PMCs innovative approach places the bass driver near one end of a long tunnel (the Advanced Transmission Line). This tunnel is heavily damped with acoustic material specified carefully to absorb the upper bass and higher frequencies radiating from the rear of the bass driver. The lowest frequencies are allowed to pass down the line and emerge from the large vent in the same polarity as the drivers frontal radiation, the vent acting essentially as a second bass driver.

An important benefit of the approach is that the air pressure inside the cabinet, loading the bass driver, is maintained. This helps to control the driver over a wide frequency range and significantly reduces LF distortion. Consequently, the upper bass and midrange detail is not masked by harmonic distortion and the result is PMCs characteristically transparent midrange, fast, attacking bass and outstanding clarity.

A further advantage is greater bass extension and loudness than a ported or sealed design of a similar size, even if similar drivers were used. Moreover, the very consistent bass driver loading brings the welcome benefit that the frequency response remains consistent regardless of listening level, and analytical auditioning can be conducted without the need for high replay volumes to achieve optimal bass response a unique and very valuable characteristic.

No other bass loading technology provides such resolution and tonal accuracy at all volume levels

"The twenty.21s are a visual and tactile delight. ...The cymbals were so crisp, vivid and utterly delightful. No matter what I chose to feed the PMCs, they absolutely lapped it up, giving everything a highly infectious sense of tautness and musically. So the baby of the bunch punches just as hard as the daddy of the range and with width and even more enthusiasm. The PMC twenty.21s are an object lesson in how to wring a big sound from a small box with virtually none of the compromises this usually entails."

"If your heart wants big loudspeakers but your head says the must be small, then look no further."

"The 21s are gifted and accomplished musical performers."
- Adam Smith, Hi-Fi World, July 30, 2012

"Even at (quiet) very low levels the twenty.21 filled the room with music. Incisive, direct and with an open soundstage they even revealed the character of my tube amplifier. I missed nothing, I do not need to add any more superlatives. It seems that I discovered the benefits of an excellent (quiet) speaker."
- Image HiFi, Germany, May 1, 2012

Wow! The twenty.21s easy driveability and manageable size add real-world appeal to the purely audiophilic benefits of sublime sound, rich, rewarding bass and terrific imaging. With this in mind, Im keeping a pair as my reference. Underneath it, duck Dunns fast-plucked bass, to the right a sassy horn section, Steve Croppers guitar dead ahead, voices far left. It coalesced into a well of soul goodness: no overhang, just snappy attack, while the lower registers were tight enough to rattle my memory bank."
- Ken Kessler, Hi-Fi News, April 1, 2012

"The twenty.21s are fast, involving, dynamic, and produce more bass of much better quality than speakers just 32.5cm tall have any right to claim. They're sprightly, beautifully weighted and sweet, while also being highly revealing. ...These are superb little speakers, and recommended without reservation."
- Tony Williams, Gramophone, January 3, 2012

SoundStageDirect Glossary


Vinyl records are able to capture the purest quality of recorded music in true form. This is possible because the initial recording is captured on an analog source (usually tape) for the ultimate in High Fidelity sound, it is then pressed onto virgin vinyl. Analog recordings capture the bottom end (or bass) while adding sweetness to the high end (or treble) better than any digital recording ever could. Analog systems are still commonly used before they are digitally transferred to CD. This means that the sound then is altered in the transfer process when CD's are produced. The word fidelity means accuracy and faithfulness. High Fidelity sound is faithful to the original sound made by the artist, capturing maximum accuracy of what was intended for the listener to hear. Vinyl records capture those sounds for the ultimate High Fidelity listening experience!

180/200 GRAM Vinyl LP

These vinyl records are produced with 180 or 200 grams of high definition premium grade virgin vinyl. This is a higher quality audiophile pressing than the typical vinyl record of 100-120 grams. These limited edition LP's are manufactured with the hi-fi enthusiast in mind. A 180 or 200 gram LP is sometimes also referred to as an audiophile pressing, there is a higher bass response and an even warmer High Fidelity sound. 180 or 200 grams LP's are typically manufactured in limited amounts and are considered collectables, commanding a higher price.


Typically, a vinyl reissue is a repressing of an original LP, usually extracted from the recording's master-tapes. In some cases, reissues are remastered to lower surface noise and improve overall sonics. Reissues help preserve the music of an original recording, especially when original LPs become unavailable or can no longer be found. Reissues can be pressed on a variety of thickness from 150 gram to 200 gram and offer a great opportunity for records collectors to own many classic recordings.

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