From Mesa Boogie:
Mesa Boogie’s legendary BASS 400+ is the must-have backline choice for superstar bassists like Paul McCartney, Stanley Clark, Bootsy Collins, and many more. These classic tube amps still command premium prices in the used marketplace — when you can find one. Since the 400’s glory days, Mesa Boogie has produced many fine tube-driven MOSFET designs, but the ascendency of Mesa’s renowned Class D circuitry has today given us the superb Subway range.
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- Foot-switchable, 2-channel, Class A vacuum tube preamplifier with Tri-Tube topology, 3 x 12AT7 tubes
- Class D power section with 8, 4, or 2-ohm Impedance Switch
- 800W @ 4 or 2 ohms; 400W @ 8 ohms
- Channel One (Boogie Channel) with Input Gain, variable Highpass filter (25Hz–125Hz), passive 3-band EQ with Bass, Mid with variable Mid-Shift control, Treble, and Master Volume
- Channel Two (Subway Channel) with Input Gain, variable Highpass filter (25Hz–125Hz), fully active 3-band EQ (±12dB Bass, Mid, Treble) with sweepable Midrange frequency control (150Hz–2kHz), and Master Volume
- Play/Mute switch; High/Low Gain switch: Deep switch; Bright switch
- Channel/Footswitch select switch
- Global O/D Symmetry control (variable, symmetrical to asymmetrical)
- Protection and Limiting LED indicators
- Tube-driven, postmaster, balanced XLR DI Output with Line/Mic and Ground Lift switches
- Tube-driven, pre-EQ, balanced XLR DI Output with Line/Mic and Ground Lift switches
- 2 channel-independent, fully buffered series FX Loops
- Rear-panel Tuner Output with front-panel Play/Mute switch
- External Footswitch jack for Tuner/Mute and Channel Select (footswitch available separately)
- Headphone Output; Auxiliary Input; USB Power Outlet
- 2 Speakon Speaker Output jacks
- Rugged, lightweight (7 pounds, 3 ounces) fan-cooled chassis
- Handcrafted in Petaluma, California
Parkway Music is an Authorized Dealer. Our shipments are always insured and packaged securely and professionally. All of our gear is fully inspected to meet our high-quality standards and checked over by in-house techs prior to shipping. Please feel free to reach out to us for more information!












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