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BP20/25 PreAmplifiers
General Specifications:
Frequency Response:
20Hz-20kHz +/- .05dB
Maximum Output:
15 volts unbalanced, 30 volts balanced
IMD/THD: <0.0015% at 3 volts out
Sensitivity:
Balanced inputs: 1.00 V
UnBalanced line level inputs: 500 mV
Rated Noise:
-100dB (Ref. 500mV unbalanced input, 20-20kHz)
-103dB (Ref. 1 volt balanced input 20-20kHz)
XLR Connector Pin out (Balanced I/O):
Pin 1 ground, pin 2 positive, pin 3 negative
Features:
2 pair balanced female XLR inputs
1 pair balanced male XLR outputs
5 pair RCA inputs
4 pair RCA + 1 pair phono inputs (BP-20/25P and BP-
20/25MC only)
4 pair RCA + 2 SPDIF digital inputs (BP20/25 DA only)
2 pair RCA outputs
1 tape loop
Options:
Silver faceplate & hand held remote (std. is black)
19” x 1.75” Rack mount faceplate (std. 17” long)
Moving magnet RIAA phono equalization module
Moving coil & moving magnet RIAA phono EQ
module
Digital audio input (SPDIF) module
Dimensions:
Standard version: 17” x 1.75” x 11”
43.18cm x 4.44cm x 28cm
Rack mount version: 19” x 1.75” x 11”
48.26cm x 4.44cm x 28cm
Weight: 17 lbs (7.5 kg)
MPS-1 POWER SUPPLY SPECIFICATIONS:
Dimensions: 7.75” x 4.525” x 2.36”h
Weight: 2.6 lb. (1182g)
Electrical:
120VAC/60Hz/29VA, Fuse: 315mA/250V time lag
230VAC/50Hz/29VA, Fuse: 160mA/250V time lag
240VAC/50Hz/29VA, Fuse: 160mA/250V time lag
Output: +/-28VDC @ 350mA (56VDC @ 700mA)
All fuses are 5mm x 20mm, time lag type and are accessi-
ble only by removing the top cover. When replacing
fuses, disconnect the power cord before opening the unit!
Recommended replacement fuses:
for 100/120VAC models: Littlefuse 218.315
Bussmann GMC-315mA
for 230/240VAC models: Littlefuse 218.160
Bussmann GMC-160mA
Additional Specifications for BP20/25DA:
Input Sample Rate: 16kHz to 108kHz.
Word Length: 16, 18, 20, 24 Bit
Data format: SPDIF standard
Distortion: < 0.002%, 20Hz-20kHz
Signal to Noise Ratio: > 100dB
Frequency Response: 20Hz-20kHz +/- .1dB
Additional Specifications for BP20/25P
Phono Inputs:
Distortion:
<0.005%, IM or THD, any frequency or combination of fre-
quencies from 20-20kHz, at rated output or below.
Rated Noise:
Phono: -80dBA referred to an input of 5 millivolts RMS @
1kHz
RIAA Accuracy:
Within less than +/- 0.05dB from 20-20kHz inclusive
Input sensitivity: 5mV
Additional Specifications for BP-25MC
Phono Inputs:
Distortion:
<0.005%, 20-20kHz, with preamplifier driven to full rated
output
Noise:
Equivalent to approximately 1000 ohm metal film register
(Thermal noise greater than 85dB below 0.6mV input,
unweighted)
Gain: 16.5 or 22.5dB (internally reconfigurable)
Frequency Response: Below 5Hz to above 30kHz, within
less than +/- 0.5dB
Input sensitivity: 350uV (0.35mV)
2
Sept 2003