Specifications – Manley 300B Preamp Original Version 1996 - 2001 User Manual
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SPECIFICATIONS
Vacuum Tubes:
2 x 300B, 2 x 6SL7GT
2 x 5AR4, 2 x OD3
Lamp type
1/4 X 1 1/4, 12 volt, .15 amp
Fuse type
120VAC operation:
MDL2, 2 AMP / 250 Volt
220VAC operation:
MDL1, 1 AMP / 250 Volt
SLO-BLO
Gain
18 dB at max Volume
1 volt in = 8 volts out
Noise Floor
typically -70 dB 1Hz - 100 kHz
Signal to noise
typically 105 dB A WGT 20-20K
Frequency Response
5 Hz to 50 kHz @ +/- 1 dB
Distortion
THD+N = -80 dB (.01 %)
zero "crossover" distortion, mostly 2nd harmonic, unmeasurable after 5th
Volume control "Left / right tracking"
1/10 dB
Volume control "steps"
-
∞
,-70,-60,-50,-46, -44,-42,-40,-38,-36,-34, etc, -12,-10, -6, 0
Input Impedance
100 Kohm
Output Impedance
100 ohms
Output Power (100 ohm Headphones)
1W (10 V RMS) (28 V P-P)
Output Power (600 ohm Headphones)
1W ( 25 V RMS) (70 V P-P)
Power Consumption
170 Watts (1.4 A @ 120VAC)