This 500W bass head features a mixture of cutting-edge technology with versatile controls, including 4-band semi-parametric tone control, as well as Markbass;VLE (Vintage Loudspeaker Emulator) and VPF (Variable Pre-shape Filter) filters. View complete and up to date Markbass TA503 500W Bass Amp Head information. Housed in a rigid 2mm thick aluminum chassis it`s also an extremely lightweight unit.
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Tube preamp analog bass head
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Provides 300W RMS at 8 ohms, 500W RMS at 4 ohms
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1/4" input jack works with active or passive basses
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Gain and Master volume controls
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Clip warning light
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Line out volume control knob
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EQ includes controls for Low, Mid Frequency Low, High Frequency Low, and High
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Mid Frequency High and Low level controls for deciding how much frequency area will be affected
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VLE (Vintage Loudspeaker Emulator) and VPF (Variable Pre-shape Filter) filters
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Neutrik Speakon Combo out jacks for use with 1/4" or Speakon speaker cables
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Balanced XLR out
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Pre EQ/Post EQ switch to determine whether the output signal is effected by the EQ settings or not
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Ground lift switch to eliminate hum
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Tuner out sends unbalanced signal sent to a tuner, amp or recording equipment not needing a balanced signal
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Send and Return Effect ensures main signal continues even if something dies in your effects chain
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Dual-sided fiberglass PC boards with lined perforations for high-quality solder connections
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Surface-mount components are silicon-sealed to isolate vibrations
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Computer-grade pre-assembled ribbon connector cable harnesses and ribbons for noise-free operation
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Integrated threaded posts for easy assembly/disassembly and added durability
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Rigid 2mm thick aluminium chassis for a long-lasting finish
Markbass TA503 500W Bass Amp Head
The Markbass TA503 has a premium tube preamp that gives this bass amp head the advantage of tube warmth and analog clarity simultaneously. The TA503 bass head boasts a flexible EQ with 4-band semi-parametric tone control and Markbass` signature VLE (Vintage Loudspeaker Emulator) and VPF (Variable Pre-shape Filter) filters. Markbass gave the TA503 bass amplifier a Pre EQ/Post EQ switch to determine whether the output signal is affected by the EQ settings or not, as well as Send and Return Effect I/O to insure your main signal continues even if something along your effect chain breaks or runs out of batteries. An optional footswitch provides mute-to-tune and EQ bypass control.
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Power
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Passive Input impedance: 500Kohm, max. voltage: 4 Vpp
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Effect return impedance: 500Kohm, max. voltage: 10 Vpp
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Active Input impedance: 500Kohm, max. voltage: 10 Vpp
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Output Power: 300W RMS at 8 ohms, 500W RMS at 4 ohms
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Power Requirement: 100/120V; 230V; 240V; 50/60Hz
Controls
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GAIN: 80dB to +35dB range
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LINE OUT: Level control on front panel
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PRE/POST EQ (for line out): Switch on rear panel
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GROUND LIFT: Switch on rear panel
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MASTER VOLUME
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FOOTSWITCH: Mute, EQ bypass
Equalization
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LOW
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Center frequency: 40-300Hz; level ±16dB
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LOW-MID
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Semi-parametric: frequency 100 800Hz, level ±16dB
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HIGH-MID
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Semi-parametric: frequency 700Hz 6kHz, level ±16dB
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HIGH
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Semi-parametric: 1.5-10kHz shelf; level ±16dB
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VPF (Variable Pre-shape Filter)
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Center frequency: 380Hz (cut)
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VLE (Vintage Loudspeaker Emulator)
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250Hz 20kHz cut
Outputs
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EFFECT SEND
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Unbalanced, max. voltage 20 Vpp (pre-EQ)
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TUNER OUT
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Unbalanced, max. voltage 2 Vpp
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LINE OUT
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Balanced XLR, max. voltage 15 Vpp
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SPEAKER OUT
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Speakon, 1/4"
Other
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Dimensions: 14.5"(W) x 3.39"(H) x 11.89"(D)
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2U tall
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19"(W) with rack ears
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Weight: 8.6lbs.
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Tubes: 1 x EECC81, 1 x ECC83 (JJ Electronic)
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