SWR has partnered with Marcus Miller - arguably the most influential bassist of his generation to create the ultimate tool for bassists. Or as Marcus calls it: The missing link between your bass and a great sound! Working closely with our SWR engineers, Marcus painstakingly customized the feature set of this preamp to accommodate his own distinctive array of tones, while taking into consideration the needs of other bassists of all styles. The result is simply one of the most versatile bass products ever developed.

Series Preamps/Power Amps
Type Tube Bass Preamplifier
Description SWR has partnered with Marcus Miller - arguably the most influential bassist of his generation to create the ultimate tool for bassists. Or as Marcus calls it: The missing link between your bass and a great sound! Working closely with our SWR engineers, Marcus painstakingly customized the feature set of this preamp to accommodate his own distinctive array of tones, while taking into consideration the needs of other bassists of all styles. The result is simply one of the most versatile bass products ever developed.
Features Two Selectable Inputs for Easy Instrument Changes;
3-Band Semi-Parametric Tube-Driven EQ with Sweepable Mids;
EQ Bypass Capability;
Marcus Miller-Modified SWR Aural Enhancer Circuit with Pull Defeat;
All-Tube Studio-Quality Direct Out;
Mute Switch;
Bass Intensifier Circuitry;
SWR Studio-Quality Tube-Driven Compressor with Pre or Post EQ Comp Position Switch; Boost Feature with Volume Control & Compression Blend;
Side-Chain Effects Loop with Blend Control;
Selectable Line Out for Tube DI, Post EQ or Compressor position Out;
4-Button Footswitch (Bass Intensifier, EQ Bypass, Effects Loop, Boost) included;
Channels One Channel (Two Selectable Inputs for Easy Instrument Changes)
Controls Front Panel:
Inputs,
Mute On/Off Switch,
Bass Intensifier: On/Off Switch, Level, Cutoff,
Compression: On/Off Switch, Threshold, Ratio, Comp Position, Attack, Release, Meter,
Boost: Level, Comp Blend, Level/Comp Blend On/Off Switch
Pad On/Off Switch,
Preamp Clip LED,
Gain,
Aural Enhancer,
EQ: Bass, Semi-Parametric EQ with (Low, Mid, High), Treble,
EFX Blend,
Master,
Power Switch,

Back Panel:
XLR and 1/4" Preamp Out with Ground Lift Switch,
Tube DI with XLR and 1/4" Out with Ground Lift Switch, Level, 00 to 1800 Phase Switch and 3-Position Direct (Pre)/Compressor Output/Line (Post) Switch,
Effects Send and Return Jacks,
Footswitch Jack,
Tuner Out Jack,
Aux Input Jack (Instrument)
Covering Brushed Blue Anodized Aluminum Rackmount Panel with Black Control Knobs and Chrome Handles
Weight 13 lb (5.9 kg)
Dimensions Height: 3.5 in (8.9 cm)
Width: 19 in (48.3 cm)
Depth: 11 1/8 in (28.3 cm)