The Classic 300 uses two ECC83 preamp tubes, two ECC99 tubes, and six KT88 power tubes, all manufactured by JJ Electronics.

Click here for Bass Player magazine's video review of the Classic 300!

INPUTS

INPUT
impedance 500 Kohm, max. voltage 5 Vpp
EFFECT RETURN
impedance 22 Kohm, max. voltage 15 Vpp

CONTROLS

GAIN
-60 dB to +35 dB range
MASTER VOLUME
GROUND LIFT
switch on rear panel

EQUALIZATION

LOW
center frequency: 80 Hz; level: ±12 dB
LOW MID
center frequency: 400 Hz, level: ±12 dB
HIGH MID
center frequency: 800 Hz, level: ±12 dB
HIGH
center frequency: 3 kHz, level: ±12 dB
OUTPUT

LINE OUT
balanced XLR, max. voltage 25 Vpp
EFFECT SEND
unbalanced, max. voltage 18 Vpp (pre-EQ)
TUNER OUT
unbalanced, max. voltage 2.5 Vpp
SPEAKER OUT
2x speakon/1/4" combo jacks
OTHER

WEIGHT
48.06 lbs / 21,8 kg
DEPTH
12.44 in. / 31.6 cm
HEIGHT
11.65 in. / 29.6 cm
WIDTH
19.76 in. / 50.2 cm
OPTIONAL FOOTSWITCH
mute
OUTPUT POWER
300W @ 4 ohms or 2 ohms, 175W @ 8 ohms
POWER REQUIREMENT
100V; 120V; 230V; 240V
50/60Hz
(Voltage is factory preset according to region of sale)

NOTES:
Markbass amps/combos are manufactured to be sold and used in the country of purchase, and they are factory preset to that country’s voltage.
Due to homologation issues, the voltage may not be changed.

Product specifications are subject to change without notice
Here's a beautiful example of how old and new technology can--and should--work together. The heart of the Classic 300 is its tubes. The brain is its microprocessor! Ten tubes give you the warmth and fullness of the great old amps that are now aging or retired. But times have changed. Don't you think it's about time you got an amp that took care of itself? The Classic's futuristic onboard microprocessor re-biases your tubes every time you start up the amp, allows you to customize your bias adjustments, and tells you if and when any tubes need to be replaced! Tube amps used to be finicky and unreliable. Now you won't have any nasty surprises on the gig, and you'll know exactly when and how your tubes need to be serviced. This handsome head puts out a loud 300 watts of power.