December Stereophile raves about the JC 1
Michael Fremer’s review of the Bryston 7B SST monoblocks is in The December Stereophile. His speakers are the impressive new Wilson MAXX Series 3.
During the course of this review John Atkinson brought over his personal pair of Halo JC 1s for comparison.
Here is what Michael Fremer wrote:
“The Parasounds couldn’t have sounded more different. Their bass was deeper, tighter, and better controlled, yet not overdamped, so that textures were fully resolved, and rhythm’n’pacing were far more nimble. Image specificity was greater, and dimensionality was more fully expressed. Transients were faster and more effervescent while being free of artificial etch. Reverb was expressed as genuine depth where appropriate, dropping way down in level into the noise floor before dissipating. Images leapt from the speakers and floated more freely in a huge three-dimensional space-but most noticeable, and almost immediately, was the delicacy, resolution, and coherence of the reverb’s decay.
Neither pair of Brystons matched Parasound’s low-level resolution and microdynamic delicacy. With the much nimbler, more holographic-sounding Parasounds there was more musical information to consider and more musical pleasure to be had. Detractors might say the Halos’ top end was brash, but I counter that that was the fault of the recordings, not the amps, which had a sweet top end despite all their resolution and transparency.”
Continuous power output, 20Hz - 20 kHz:
- 400 watts RMS x 1, 8 Ω
- 800 watts RMS x 1, 4 Ω
- 1200 watts RMS x 1, 2 Ω
Class A power output, 20Hz - 20 kHz:
- 25 watts, bias set to high, 8 Ω
- 10 watts, bias set to low, 8 Ω
Current capacity:
- 135 amperes peak
Power bandwidth:
- 2 Hz - 120 kHz, +0/-3 dB at 1 watt
Total harmonic distortion:
- < 0.15 % at full power
IM distortion:
- balanced 16 V rms
-
<0.03%
Slew rate: strong>
- > 130 V/µsecond
Dynamic headroom:
- > 1.8 dB
Input sensitivity:
- 1 V for 28.28 V, THX Reference Level
Input impedance:
- 100 k Ω
S/N ratio:
- >120 dB, IHF A-weighted, bias set to high
- >122 dB, IHF A-weighted, bias set to low
Damping factor:
- > 1200 at 20 Hz
Power Requirement :
- 250 watts idle 1280 watts full power into 4 Ω
DC trigger output capacity :
- +12 Vdc, 150 mA
Dimensions:
- 17-1/4" w x 7-5/8" h x 20 " d, 7 " h without feet
Net weight:
- 64 lb.
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