SWR SM500 SM 500 Bass Guitar Amp Amplifier Head

SWR SM500 SM 500 Bass Guitar Amp Amplifier Head

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SKU: 850014
SWR SM500 Bass Amp Head

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

Technical Info
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