Operating Instructions
OVERVIEW:
Congratulations on your choice of the SUBWAY TT-800™ and welcome to the MESA/Boogie® family! First, we would like to thank
you for choosing us as your amplifier company and trusting us to help create your musical voice. This is something we never take
for granted and you’ll find that we are here and ready to assist should you ever need help. Our goal is to help you sound your best
at all times! We feel confident that your new amplifier will bring you many years of reliable service, rewarding inspiration and create
a newfound freedom to express your music.
You have chosen an amplifier bred of a fine heritage, and this model is a testament to our legacy of tone. Its forefathers can be traced
back to the very first MESA amplifier ever built, the MESA 450 Bass Head. In fact, the first 5 MESA amplifiers built in the Lagunitas
mountain shack were bass amps… a piece of trivia little known and overshadowed by our overwhelming notoriety for guitar amplifi-
cation. But we’ve always loved the bass, and have — since day one — been committed to elevating its stature through our art form.
The bloodline for MESA bass continued with the first rack-mount chassis bass amplifier in 1980, the D-180. The mid-eighties saw the
introduction of the BASS 400 and later in 1988, the BASS 400+ with its stunning pitch, punch and power delivered by an additional
6 x 6L6s bringing the total to 12 x 6L6 power tubes in the mighty power section.
The 400+ went on to become a classic, used by the world’s most talented bassists for two decades. Paul McCartney, Mark King, Stan-
ley Clark, Jack Blades, Michael Anthony, Blasko and Bootsy Collins, are but a few of the international stars that put the 400+ center
stage to anchor the band during its 20 year build cycle. These iconic amps still bring top dollar when you can find one changing hands
on the pre-owned market. While MESA has since pioneered an entire line of tube-driven mosfet amplifiers (including the legendary
Walkabout, and lightweight class D amplifiers (Subway series)), that shored up our position in the bass market, changing times have
encouraged us to revisit our roots by incorporating Randall Smith’s legendary Bass 400+ preamp concepts with our newer Subway
technology to create a new approach to a 2 channel bass amp, while remaining true to our long-standing heritage and tradition of tone.
2019 is the 50th anniversary of the Mesa Boogie company. While looking through the company’s archives, studying some of Randall’s
legacy bass amp designs, and talking with the guys working at the company when the 40/400+ were being developed, we were es-
PAGE 1
FRONT VIEW: SUBWAY® TT-800™
REAR VIEW: SUBWAY® TT-800™
GAIN HIGHPASS BASS MID MID FREQ TREBLE VOLUME
INPUT
25HZ 125HZ 150HZ 2KHZ
1KHZ00 0
25HZ 125HZ NORM SHIFT
-12 +12
0 10 0 10 0 10 0 10
0 10
0 10
0 10 -12 +12 -12 +12
CHANNEL
SELECT
FTSW
ON
ON
O/D SYMMETRY
SUBWAY CH
BOOGIE CH
POWER
ASYMSYM
PROTECT
LIMIT
PLAY
MUTE
DEEP
ON
BRIGHT
ON
LOW
GAIN
HIGH
SPEAKER OUTPUTS
POWER
MAX AVG PWR CONSUMPTION 400W
MAINS FUSE: INTERNAL T-6.3A/250V
MADE IN PETALUMA, CA, USA WITH THE WORLD’S FINEST MATERIALS
100V-240VAC
~50/60Hz
INPUT
POWER
USB DEVICE PWR
OFF ON
AMPLIFIER
44YV
FX LOOPS
400 WATTS/8 OHM
800 WATTS/4 OR 2 OHM
RATED
POWER
SUBWAY
®
TT-800
™
BASS AMPLIFIER
SPEAKER
IMPEDANCE
POST MASTERS
TUBE DRIVEN TUBE DRIVEN
PRE-EQ
HEAD
PHONES
FOOT
SWITCH
RETURN
SEND
SUBWAY
RETURN
SEND
BOOGIE
TIP = MUTE
RING = CHANNEL (POST-MASTERS)
AUX IN
TUNER
OUTPUT
2 Ω
8 Ω
4 Ω
USB POWER ON
TUBE TYPE: 12AT7 / 12AU7
CATHODE BIASED CLASS A
LEVEL
LINE
PIN 1
LIFT
MIC
GROUND
LEVEL
LINE
PIN 1
LIFT
MIC GROUND
DIRECT OUTPUT
(PHANTOM POWER PROTECTED)
2 OHM MINIMUM LOAD
WARNING:
Replace fuse with same type/rating only.
Do not expose to rain or moisture.
CAUTION:
Risk of Electric Shock. Do Not Open.
No user serviceable parts inside.
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