Apple AirPods Pro 3: First Impressions
Hegel H150 Integrated Amplifier Officially Announced
Sonus faber Announces Amati Supreme Speaker
FiiO M27 Headphone DAC Amplifier Released
Audio Advice Acquires The Sound Room
Sponsored: Pulsar 121
CH Precision and Audiovector with TechDAS at High End Munich 2025
KLH Model 7 Loudspeaker Debuts at High End Munich 2025
Sponsored: Symphonia
Where Measurements and Performance Meet featuring Andrew Jones
Sponsored: Symphonia Colors

LATEST ADDITIONS

Polk Enters the Apple Stores

On February 5, <I>This Week in Consumer Electronics</I> announced that Polk Audio had announced plans to sell its I-Sonic ES2 iPod docking tabletop hi-fi ($499) and miDock Studio portable iPod speaker through the Apple website and freestanding store network. This came less than a week after Polk announced that Best Buy would carry its TSi loudspeakers, PSW powered subwoofers, select RM series drive-units and, of course, the SurroundBar 360 DVD Theater (all of which are currently available from the rival Circuit City chain).

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Anti-Node: Active Room-Acoustics Correction

Recently, I assessed four disparate room-correction systems based on digital signal processing (DSP): Copland DRC205, Lyngdorf Audio RoomPerfect, <A HREF="http://www.stereophile.com/musicintheround/1105mitr">Velodyne SMS-1</A>, and <A HREF="http://www.stereophile.com/musicintheround/706mitr">Meridian DRC</A>. I concluded that Meridian's approach&mdash;which applies IIR (Infinite Impulse Response) "anti-resonance" filters to suppress room resonant modes, if only partially&mdash;was, in many respects, the best. What I particularly like about Meridian DRC is that, unlike the Copland and Lyngdorf processors, its approach to system tonal balance is largely hands-off. Yes, it lightens up the extreme bass a little, as you'd expect, but it doesn't recast the system balance in any way that might prove undesirable. If you like your system's tonal character as it is, Meridian DRC behaves just as you'd want a room-correction system to behave: it quells room resonance effects while leaving the system's essential sound well alone.

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Torus Power RM20 Audio/Video Power-Isolation Transformer

When I arranged to review the Bryston 28B-SST monoblock power amplifier, I wanted to be certain that the 1kW amplifier wouldn't be starved for current. Bryston advised me that Plitron, who manufacture the 28B-SST's toroidal transformer, also make Power Isolation Units (PIUs), under the brand name Torus Power. Torus explained that its PIUs combine surge suppression with massive toroidal transformers to provide AC power conditioning and protection from voltage surges.
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