Joseph Audio Perspective loudspeaker Specifications

Sidebar 1: Specifications

Description: Two-way, three-driver, floorstanding loudspeaker with vented enclosure. Drive-units: 1" (25mm) Sonatex-dome tweeter, two 5.5" (140mm) magnesium-cone woofers. Crossover frequency: 2kHz. Crossover: Asymmetrical Infinite Slope. Frequency response: 35Hz–20kHz, ±2dB (listening window). Sensitivity: not specified. Impedance: 8 ohms nominal, 6 ohms minimum. Power handling: not specified. Supplied accessories: cone feet and stabilizer bars.
Dimensions: 36" (915mm) H by 8.5" (216mm) W by 13" (330mm) D. Shipping weight: approximately 81 lbs (37.6kg) each, plus approximately 20 lbs (9.07kg) for the two stands.
Finish: Black front baffle and rear panel, high-gloss wood veneer (Maple, Cherry, Rosewood, Black, Sapele) or Piano Black side and top panels.
Serial numbers of units reviewed: P0001L & R.
Price: $12,999/pair. Approximate number of dealers: 23.
Manufacturer: Joseph Audio Inc., PO Box 1529, Melville, NY 11747. Tel./Fax: (800) 474-4434. Web:

Joseph Audio Inc.
PO Box 1529
Melville, NY 11747
(800) 474-4434

Naimdude's picture

Does the 13 000$ big ones get you the speakers, and that giant violin?

otaku's picture

Yes, it adds lots of "bass"!

JRT's picture

JA wrote, " fig.3, the upper woofer crosses over to the tweeter at a slightly lower frequency than the specified 2kHz, with a steep rolloff broken by resonant modes at 6.2 and 9kHz. These are well suppressed by the crossover..."

What I think we are seeing at 6.2kHz in your measurement is not a modal breakup resonance of the diaphram, but rather is the low pass crossover response above the notch at ~3.8kHz. The peak you measured at ~9kHz is more characteristic of the modal breakup resonance of Seas' Excel W15 family of woofer diaphrams.

The low pass crossover displays characteristic effects of an elliptical filter that combines a notch and low pass, with the notch steepening the intial rolloff of the low pass. For a description of this take a look at Albert Neville Thiele's US patent 6854005.

Jeff Joseph's picture

The magnesium woofer without a filter has resonances as JA correctly noted at 6.2 and 9kHz, but the woofer's highest peak is actually at 4.9kHz! (about 5dB above the 6.2kHz resonance). JA's measurements confirm that the resonances are well-supressed.

Anon2's picture

I have not heard this particular JA speaker. I have heard the JA Pulsar at an audio exhibition. JA speakers are out of my price range, but it was a privilege to hear the Pulsar.

The diminutive Pulsar projects an enormous soundstage that simply belies its size, and exceeds that of some larger, dare I say floorstanding, speakers. The build quality of these speakers is something that you have to see in person to appreciate fully, though they look great in this article, too.

The top-end Seas drivers used in these speakers are heartily capable, and maintain their composure, even at the highest volumes. They ably handle powerful amplification (I heard them with Hegel integrated amplification).

JA Speakers are fine products. I hope those interested get a chance to hear these speakers.