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Product Description
The Mo’ Bass is a high-power bass guitar amplifier head produced by SWR Sound Corporation, a brand well known for professional bass amplification. Released in the late 1990s, the Mo’ Bass was designed to combine strong clean bass tone with built-in digital effects, which was unusual for bass amps at the time. It delivers around 900 watts of power (split between two channels), allowing players to run stereo setups or bi-amp rigs for greater tonal control. The amplifier includes features such as chorus, octave, envelope filter, overdrive, and compression, along with SWR’s characteristic clear, hi-fi sound that emphasizes tight lows and crisp highs. Because of its versatility, powerful output, and integrated effects, the Mo’ Bass became popular with touring and studio bassists who wanted a single unit capable of producing a wide range of modern bass tones.
Presented in great condition and supplied with its footswitch.
Product Specs/Additional Information
Power Output: Up to 900 watts total (typically 2 × 450W stereo at 2 Ω)
Channels: Dual-channel design (clean + effects channel)
Built-in Effects:
Chorus
SubWave octave generator
Envelope filter
Overdrive
Compression
EQ Section:
3-band EQ (bass, mid, treble)
Semi-parametric mid control
Aural Enhancer circuit (signature SWR tone shaping)
Outputs:
Stereo speaker outputs
Balanced XLR direct output for PA/recording
Effects send/return loop
Inputs:
Active/passive bass input
Footswitch control input for effects
Operating Modes:
Stereo operation
Bridged/combined power options depending on cabinet setup
Construction: Rack-mount amplifier head (typically 3U rack size)
Weight: ~30–35 lb (≈14–16 kg)
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Product Description
The Mo’ Bass is a high-power bass guitar amplifier head produced by SWR Sound Corporation, a brand well known for professional bass amplification. Released in the late 1990s, the Mo’ Bass was designed to combine strong clean bass tone with built-in digital effects, which was unusual for bass amps at the time. It delivers around 900 watts of power (split between two channels), allowing players to run stereo setups or bi-amp rigs for greater tonal control. The amplifier includes features such as chorus, octave, envelope filter, overdrive, and compression, along with SWR’s characteristic clear, hi-fi sound that emphasizes tight lows and crisp highs. Because of its versatility, powerful output, and integrated effects, the Mo’ Bass became popular with touring and studio bassists who wanted a single unit capable of producing a wide range of modern bass tones.
Presented in great condition and supplied with its footswitch.
Product Specs
Power Output: Up to 900 watts total (typically 2 × 450W stereo at 2 Ω)
Channels: Dual-channel design (clean + effects channel)
Built-in Effects:
Chorus
SubWave octave generator
Envelope filter
Overdrive
Compression
EQ Section:
3-band EQ (bass, mid, treble)
Semi-parametric mid control
Aural Enhancer circuit (signature SWR tone shaping)
Outputs:
Stereo speaker outputs
Balanced XLR direct output for PA/recording
Effects send/return loop
Inputs:
Active/passive bass input
Footswitch control input for effects
Operating Modes:
Stereo operation
Bridged/combined power options depending on cabinet setup
Construction: Rack-mount amplifier head (typically 3U rack size)
Weight: ~30–35 lb (≈14–16 kg)










