SWR SWR SM-500 Professinoal Bass Amplifier Head

In the shop we have a lightly used SWR SM-500 Bass Amp Head.
This amp has lived its life in a wrack and works well.

Includes IEC Cable, does not include speaker cables or box.

Here's more from SWR:
This advanced head features stereo or mono operation (250 watts per side or 500W mono at 4 ohms), precision 4-band paragraphic EQ plus Bass, Treble, and Transparency controls (all EQ is +/-15dB cut/boost). Paragraphic EQ provides frequency sweep knobs and a level slider for each band. The SM500 has a tube preamp, an adjustable Limiter, SWR's famous Aural Enhancer, a sidechain Effects Loop with Blend control, Speakon and 1/4" outputs, and an XLR Direct Out with switching for Line/Direct mode. All this power, versatility, and tone from an amp only 20 lbs. in weight. This is a serious professional amp, the best bass head SWR offers.

Front Panel Features
- Dual independent input jacks compatible for both active and passive instruments

- Gain control with LED peak clipping indicator

- Limiter with variable threshold control

- Aural Enhancer Control

- Bass Control +15dB - 15dB (shelving point 80 Hz)

- Treble Control +15dB - 15dB (shelving point 2 KHz)

- Transparency Control +15dB - 15dB (shelving point 5 KHz)

- Variable Graphic Equalizer +15dB - 15dB:
Band One: 40 Hz to 160 Hz
Band Two: 80 Hz to 320 Hz
Band Three: 200 Hz to 800 Hz
Band Four: 400 Hz to 1600 Hz

- Effects Blend Control

- Dual Concentric (Stereo) Master Volume Control

- Rack Handles

- Speaker On/Off Switch

- Power On/Off Switch

Rear Panel Features:
- Side Chain Effects Loop

- Tuner Output

- Balanced XLR Output with select switch for Line or Direct Mode, ground lift and pad control

- Power Amp Assign Switch selects Bridge or Stereo Mode

Speaker Outputs:
- Two 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, 8 Amp, Fast Blo

- Line Fuse: 3AG, 7 Amp, Slow Blo

Internal Features
(1) 12AX7 Preamp Tube Cooling fan

Frequency Response: 10Hz and 40KHz (Power Amplifier)

Dimensions (H x W x D): 3.5 x 19 x 13.375 in.

Weight: 20 lbs.

Power Output
Bridge/Mono Mode:
500 Watts @ 4 Ohms
400 Watts @ 8 Ohms
250 Watts @ 16 Ohms
(minimum load = 4 Ohms)

Stereo Mode (per side):
300 watts @ 2 Ohms
250 watts @ 4 Ohms
150 watts @ 8 Ohms
(minimum load = 2 Ohms)

Sensitivity
Full output under clipping, 8 ohms load, 100 Hz

Passive Input Jack: 38 millivolts

Active Input Jack: 155 millivolts

Power Amplifier (Effects Return Jack "in"): .5 volts

Signal To Noise Ratio: -72 dB(<10 millivolts typical)

Equivalent Input Noise: 9 microvolts

Input Impedance
Passive/Active Input: 800K Ohms

Active Input: 60K Ohms

Effects Return: 27K Ohms

Output Impedance
Effects Send: 100 Ohms

XLR Balanced Out: 750 Ohms

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