The PSI Audio A21-M ranks #22 out of 46 total Large Size Powered Bookshelf Speakers for sound quality. See Top Recommended Speakers By Attribute for all the top speaker suggestions.
#22 PSI Audio A21-M: $3,720 each B&H Photo
Pros: PSI Audio deliberately skips DSP entirely, using a proprietary Coherent Phase Response analog circuit to keep phase alignment accurate without adding conversion stages, tracing its design back to the Studer A3 studio monitor. The sound power directivity index tracks tightly (standard deviation 3.39) and on axis deviation measures a moderate 0.375dB average, and it reaches a measured 39.6Hz extension point with a wide 80 degree horizontal by 30 degree vertical dispersion pattern.
Cons: The bass alignment measures a Q of 0.96, close to the point where a port tuned system starts to show a mild peak rather than a clean rolloff, worth knowing if placed near a wall. Sold as a single unit rather than a pair, a stereo set runs roughly $6,000 to $7,800 depending on retailer and finish. With no DSP or room correction on board, getting the most from it depends more on room treatment and placement than with a comparable DSP equipped monitor.
How it compares: Just above it: JBL 708P - $280 more. Just below it: Presonus Eris Studio 8 - $3258 cheaper.
| Bass Extension (-10dB) | 33.2Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 39.6Hz (measured, Audio Science Review) |
| Country | Switzerland |
| Crossover Points | 2.4kHz |
| Dimensions | 9.8"H x 15.7"W x 11.8"D (250 x 400 x 300 mm) (9.9 x 15.8 x 11.9 in) |
| Drivers | 27mm handmade dome tweeter, 172mm cone woofer |
| Enclosure | ported |
| Frequency Response | 38Hz-23kHz -6dB |
| Max SPL | 110dB short term, 121dB peak |
| Power Output (Watts) | 335W total (280W woofer, 55W tweeter, Class A/B) |
| Warranty | 5+1 years |
| Weight | 28.2 lbs / 12.8 kg (28.2 lbs) each |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples