The Subway Evolution – Boogie® Bass Returns with the Mesa/Boogie Subway TT-800 Lightweight 800-Watt Bass Amp Head
The all-tube Boogie® BASS 400+ was a modern-day classic used by the world’s most talented bassists for over two decades. From Paul McCartney to Mark King, Stanley Clark to Jack Blades and Michael Anthony, the 400+ crossed borders and musical genres to take center-stage behind true Icons during its 20-year build cycle.
Today it’s their award-winning Subway® Series taking names with accurate Tone, warmth and portability in the Class D realm. The evolutionary step forward beckons to combine these two distinctive preamps and create a powerful, portable way to feature their unique personalities in one package. The Subway® TT-800™ answers that call!
Tube Bloom or FET Punch & Detail, It’s All Yours On Demand!
Two Separate Channels in a Dual Mono configuration feed the Subway® TT-800™’s muscular, articulate 800-Watt Class D power section and create the foundation from which to build your ultimate Bass Tone.
The TT-800 features an all-new tube driven preamp allowing bassists to experience the rich, blooming tube character of the legendary tone stack architecture from the Bass 400+ in the Boogie® channel or the modern tone of the award-wining Subway Channel with enhanced tightness in the low end, accurate punchy mids and crystal clean highs. These Channels can be used to switch between (Foot Switch optional) for different responses and sounds with one Instrument, or dedicated to separate Instruments with different characters and needs.
With their patch-point style independent Effects Loop design, you can also choose to run independent processing for each Channel/Instrument or substitute a favorite external preamp or modeler for one of the switchable Channels.
Vintage Enhanced and Modified Modern Create Harmony
The top BOOGIE® Channel, featuring our storied Bass 400+ signal path, breathes and blooms with 3-D tube warmth and includes new improvements like the Subway’s HIGHPASS, and a semi-parametric control for the MID frequencies, which adds immensely to the versatility of an already epic sound.
The lower SUBWAY® Channel provides everything the modern bassist could want; articulate, nuanced detail served up with immediacy and authority in a tighter tracking, more neutral character and now features a tube preamp.
Modern feature packed, the TT-800’s DEEP and BRIGHT switches add tone shaping opportunities and allow for taming “boomy” rooms by switching DEEP off or kicking it in for styles such as Reggae. BRIGHT adds sparkle and sheen and Subway fans have been known to use the feature for advanced techniques such as slapping and adding dimension and clarity to chordal work.
Global GAIN switching allows for custom configuration of attack and headroom characteristics. LOW provides a clean, clear sound in comparison to the HIGH setting that ramps up driving the tubes and is especially notable in the Boogie Channel. A New OD (Overdrive) SYMMETRY control features tightly-glued harmonics toward the (counterclockwise) (SYM) extreme or a looser, more tube-like harmonic spread in the ASYM (clockwise) half of the control.
SPECIFICATIONS
- Preamp Type: Two Channels, Class A Vacuum Tube Preamps w/ 3x Mesa 12AT7
- Wattage: 800 Watts @ 4 or 2 Ohms / 400 Watts @ 8 Ohms
- Graphic Eq Reverb Fx Solo: Global: Deep Switch, Bright Switch Channel One – Boogie Channel features: Variable High-Pass Filter (25Hz – 125Hz) and Active Driven Passive 3-Band EQ (Bass, Mid with variable Mid-Shift Control, Treble) Channel Two – Subway Channel features: Variable High-Pass Filter (25Hz – 125Hz) and Fully Active 3-Band EQ (+/- 12dB of Bass, Mid & Treble) with Sweepable (variable) Mid Frequency Control (150Hz-2000Hz)
- Foot switchable Functions: External Switching Jack for Channel Select & Tune/Mute (Footswitch Sold Separately)
- Weight: 7 lbs. 3.oz.
- Dimensions: 4″ H x 12″ W x 11.375″ D
- Available Format: (Metal) Head – Rackmount Kit Optional
- Amp Type: Tube Preamps & Class D Power Amp
- Preamp Tubes: 3x Mesa 12AT7
- Power Amp Tubes: Class D Power Amp
- Power Amp Details Class Wattage: Light-Weight, Compact Class D Power Amp with Variable O/D Symmetry Control, Protection, Limit LED Indicators
- Effects Loop Bypass Options: Two Fully Buffered, Channel Independant Series FX Loop
- External Switching Jack Options And/or Midi: External Switching Jack for Channel Select & Tune/Mute (Footswitch Sold Separately)
- Speaker Outputs: 2 – Speakon Output Jacks (no 1/4″ speaker jacks) – 8, 4 or 2 Ohms
- Cabinet Simulation Direct Live recording Output: 1x Tube-Driven, Post Master, Balanced XLR (DI) Out with Line/Mic & Ground Lift Switches / 1x Tube-Driven, Pre-EQ, Balanced XLR (DI) Out with Line/Mic & Ground Lift Switches
- Extra Features: USB Power Outlet, Headphone Output and Auxiliary Input, Optional Two Space Rackmount Kit Available (sold separately)
Manufacturer: Mesa Boogie
Model: 6.TT8
SKU: I709843-1-WHXA
We are Chuck Levin’s Washington Music Center
Since 1958, Chuck Levin’s Washington Music Center has been the trusted destination for musicians and audio professionals across Maryland, Virginia, and Washington, D.C. Family-owned and operated, our legendary music store delivers Everything in Music®—from instruments and recording gear to pro audio, rentals, and repair services.
Our team of musicians and industry experts lives and breathes gear, helping you build the perfect setup for your next performance, studio session, or installation. As an authorized dealer for top brands, we also offer our award-winning CHUCKSCLUSIVE line—exclusive, limited-edition instruments and collaborations recognized with the NAMM Top 100 Dealer Innovation Award for redefining what a music retail experience can be.
Chuck Levin’s isn’t just a store—it’s a community built by players, engineers, and creators who share a lifelong passion for sound. Stop by our legendary Wheaton, MD showroom or contact us anytime for expert advice, product questions, or the best possible deal on your next piece of gear.

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