SWR SM-900 Bass Head Amplifier 1990's - Black - Works Great! SN0504

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Overall Great Condition. Tested, Pots Sprayed and Cleaned. Works Great.

The SWR SM-900 Bass Amp has the power, the sound, and the versatility bass players dream of. It can be run mono, stereo, or biamped and delivers 350W RMS stereo and 800W mono into 4 ohms. It has 2 independent and footswitchable 3-band, semi-parametric EQs, sidechain stereo and mono effects loops, an effects blend control, tuner send, adjustable limiter, a built-in crossover, and an XLR record out with pad and ground lift. Fan cooled, rackmountable.
Features
FRONT PANEL:
All tube preamp gain stages
Dual independent input jacks compatible for both active and passive instruments
Gain control with LED peak clipping indicator
Limiter with variable threshold control
Exclusive Aural Enhancer circuitry
Master volume control w/clip LED indicator
Active bass and treble controls
2 independent switchable
3-band semi-parametric EQs
EQ footswitch
Effects blend control
Tuner send
Electronic crossover
Rackmountable
Bi Amp Crossover Point Control: 100Hz to 1000Hz
Crossover Slope: 12 dB per octave
Rack Handles
REAR PANEL:
Stereo and Mono Effects Loop
Balanced XLR Output with select switch for Line or Direct Mode
Ground lift & pad control
High and Low Crossover Outputs
Power Amp Assign Switch selects Bridge or Stereo Mode
SPEAKER OUTPUTS:
2 - 1/4" jacks each for Left and Right Stereo Out
One Speakon jack for Left and Right Side Output
One Speakon Output Jack for Mono Operation
Speaker fuses (x2): 3AG, 10 Amp, Fast Blo
Line Fuse: 3AG, 8 Amp, Slow Blo
On/Off Switch
INTERNAL:
(1) 12AX7 Preamp Tube
Cooling fan
FREQUENCY RESPONSE: (Power amplifier): -3dB @ 20Hz and 40KHz
SENSITIVITY:
Full output, 8 ohm load, 100Hz
Passive Input Jack: 50 millivolts
Active Input Jack: 200 millivolts
Power Amplifiers (Effects Return Jack "in"):1.6 volts
DiISTORTION:
Power Amplifiers (Effects Return Jack "in"): 0.03% THD
I.M. Distortion: 0.06%
System Distortion
(Gain and Master Volume full, Enhancer at minimum
and Tone controls set flat): 0.4% THD
SIGNAL TO NOISE RATIO: -75dB (<8 millivolts typical)
EQUIVALENT INPUT NOISE: 8.9 microvolts
INPUT IMPEDANCE:
Passive/Active Input: 800kOhms
Active Input: 60kOhms
Effects Return: 27kOhms
OUTPUT IMPEDANCE:
Effects Send: 100 Ohms
Tuner Send: 100 Ohms
XLR:1.5kOhms
Crossover High and Low Outs: 100 Ohms