Mesa Boogie Subway D-350 Bass Head

At Interstellar Guitars, we’re all about massive tone without gravitational limits. The Mesa/Boogie Subway D-350 is a pocket-sized powerhouse—an ultra-compact bass head that delivers earth-shaking authority from a chassis small enough to fit in your gig bag.

Weighing just 3 pounds 2 ounces, the D-350 is the lightest bass amp in MESA history. Don’t let its size fool you—this head launches 350 watts of Class D power at 4 ohms (175W at 8 ohms) with the punch, clarity, and feel that define the legendary Subway Series.

Built in Petaluma, California, the D-350 carries forward the heritage of the acclaimed Subway D-800, pairing a responsive solid-state preamp with a lightweight Class D power section and switch-mode power supply. The result? Massive, articulate tone with zero excess bulk—perfect for studio sessions, rehearsals, fly gigs, small to mid-sized venues, or as a tour-ready backup head.

The Mesa Subway D-350 is proof that you don’t need a massive rig to produce massive tone. Compact. Powerful. Road-ready.

Format: Head
Mode Voicings Styles: Low and High Gain Input and Deep and Bright Tone Contour
Channel Controls: Input Gain,Voicing, Bass, Low Mid, High Mid, Treble, Master
Amp Type: Solid-State Preamp & Class D Power Amp
Graphic EQ & Contour: Variable Voicing (Flat to Vintage Scoop), Fully Active 4-Band EQ plus Bright Switch (for enhanced top-end)
Extra Features: Headphone Output, Auxiliary Input, & USB Power Outlet with LED Indicator
Power Amp Details: Utra-Light-Weight Class D Power Amp & 8/4 Ohm Impedance Switch
Headphone Output: Headphone Output and Auxiliary Input
Fan Cooled: Low Noise Fan Cooled
Effects Loop: Fully Buffered Series FX Loop
Slave Output: Effects send acts as a preamp out. Effects return acts as a power amp in.
Wattage: 350 Watts @ 4 Ohms / 175 Watts @ 8 Ohms
Speaker Outputs: 2 - Speakon Output Jacks (no 1/4 speaker jacks) - 8 or 4 Ohms
Direct Live Recording Output: Balanced XLR Out with Pre/Post, Line/Mic, & Ground Lift Switches
Chassis Material: Aluminum
Cabinet Material: Black Powder Coated Metal
Dimensions: 3" H X 9" W X 8.25" D
Weight: 3.2Lbs
Accessories: Gig Bag with Shoulder Strap