15
Specifications
Note: Power ratings based on a nominal power line input (appropriate for the country in
which it is used). All specifications are made on the 8 ohm taps, utilizing an 8 ohm load
unless otherwise specified.
Power Output:
55 watts continuous at 8 ohms from 20 Hz to 20 kHz with less than 1% total harm o n i c
d i s t o rtion terminated with rated load (typically <0.2% @ 55 watts 1 kHz), both channels
driven. Actual power output available at clipping (defined as <1% THD) approximately 60
watts RMS.
SMPTE Intermodulation
Distortion:
<1% 20 Hz to 20 kHz @ 55 watts output
Power Bandwidth
(for 55 watt output):
7 Hz to 25 kHz (-0.5 dB points)
5 Hz to 58 kHz (-3 dB points)
Frequency Response:
5 Hz to 30 kHz @ 1 watt (-0.5 dB points)
3 Hz to 77 kHz @ 1 watt (-3 dB points)
Input Sensitivity
0.94V RMS balanced
(for 55 watt output):
0.94V RMS single-ended (inverting or non-inverting)
Input Impedance:
200K ohms balanced, 100K ohms single-ended (inverting or non-inverting)
Damping Factor:
>35 (determined using the IHF method from RS-490)
Output Impedance:
0.28 ohms at 1 kHz
Negative Voltage Feedback:
20 dB
Hum and Noise:
approximately 300 microvolts of wideband, unweighted noise @ the 8 ohm taps, input
muted; 95 dB below a 55 watt output
Rise Time:
5 microseconds
Power Requirements:
110-120 VAC 50-60 Hz (220-240 VAC); 320VA at rated output, 340VA maximum
and 200VA with no signal input
Tube Complement
4 (2 matched pair) x 6550C/KT88 - power output; 6 x 6922 - input/driver
Dimensions:
15” (38 cm) W x 20” (51 cm) D x 9” (23 cm ) H
Weight (approx.):
50 lbs (22 kg) net (unpacked)
Sonic Frontiers continually strives to improve their products; specifications are
subject to change without notice.
