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The popular TA501 amp head helps smooth out your sound with a high-quality onboard tube compressor, featuring a JJ Electronics ECC81 tube. Tone-wise, your sound is warmed up by the tube even when the compressor is off. It also includes foot-switchable mute-to-tune, an EQ bypass, ground lift to eliminate hum, exclusive Markbass' VLE (Vintage Loudspeaker Emulator) and VPF (Variable Pre-shape Filter) filters, and high-quality Neutrik Speakon Combo out jacks for use with 1/4" or Speakon speaker cables.

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Markbass TA501 500W Bass Head Features:

Bass amplifier with tube compressor, solid state preamp and analog power amp
Provides 300W RMS at 8 ohm, 500W RMS at 4 ohm
1/4" input jack works with active or passive basses
Gain and Master volume controls
Clip warning light
Tube compressor with JJ Electronics' ECC81 tube
Comp ratio tube to control gain reduction applied to the signal which works like a limiter
Neutrik Speakon Combo out jacks for use with 1/4" or Speakon speaker cables
Balanced XLR out
Line out knob controls the volume level of the Line out XLR
EQ includes controls for Low, Mid Frequency Low, High Frequency Low, and High
Mid Frequency High and Low level controls for deciding how much frequency area will be affected
VLE (Vintage Loudspeaker Emulator) and VPF (Variable Pre-shape Filter) filters
Pre EQ/Post EQ switch to determine whether the output signal is effected by the EQ settings or not
Ground lift switch to eliminate hum
Tuner out sends unbalanced signal sent to a tuner, amp or recording equipment not needing a balanced signal
Send and Return Effect ensures main signal continues even if something dies in your effects chain
Dual-sided fiberglass PC boards with lined perforations for high-quality solder connections
Surface-mount components are silicon-sealed to isolate vibrations
Computer-grade pre-assembled ribbon connector cable harnesses and ribbons for noise-free operation
Integrated threaded posts for easy assembly/disassembly and added durability
Rigid 2mm thick aluminium chassis for a long-lasting finish

Markbass TA501 500W Bass Head Specifications:

Power
Input impedance: 500Kohm, max. voltage: 9 Vpp

Effect Return impedance: 33Kohm, max. voltage: 12 Vpp
Output Power: 300W RMS at 8 ohm, 500W RMS at 4 ohm
Power Requirement: Voltage is factory preset for the U.S.

Controls
GAIN: —80dB to +25dB range
GROUND LIFT: Switch on rear panel
MASTER VOLUME
LINE OUT: level control on front panel
PRE/POST EQ (for line out): switch on rear panel
COMPRESSION RATIO: 1:1 (off) to infinity:1 (limiter)
FOOTSWITCH: mute; EQ bypass

Equalization
LOW
Center frequency: 40Hz; level ±16dB
LOW MID
Center frequency 100-800Hz, level ±16dB
HIGH MID
Center frequency 700Hz-6kHz, level ±16dB
HIGH
10kHz shelf; level ±16dB
VPF (Variable Pre-shape Filter)
center frequency 380Hz (cut)
VLE (Vintage Loudspeaker Emulator)
250Hz — 20 kHz cut

Outputs
EFFECT SEND
Unbalanced, max. voltage 12 Vpp (pre-EQ)
TUNER OUT
Unbalanced, max. voltage 2 Vpp
LINE OUT
Balanced XLR, max. voltage 25 Vpp
SPEAKER OUT
Speakon, 1/4"

Other
Dimensions: 14.5"(W) x 3.39"(H) x 11.89"(D)
With rack ears: 19"W
2U High
Weight: 7.5 lbs.
COMPRESSOR TUBE
1 x EECC81 (JJ Electronic)