Markbass TA503 500W Bass Amp Head  

Item #: 
127474181848471820
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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-par... Click To Read More About This Product

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Overview

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.

Features
  • Tube preamp analog bass head
  • Provides 300W RMS at 8 ohms, 500W RMS at 4 ohms
  • 1/4" input jack works with active or passive basses
  • Gain and Master volume controls
  • Clip warning light
  • Line out volume control knob
  • 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
  • Neutrik Speakon Combo out jacks for use with 1/4" or Speakon speaker cables
  • Balanced XLR out
  • 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
Specifications
  • Power
    Passive Input impedance: 500Kohm, max. voltage: 4 Vpp
    Effect return impedance: 500Kohm, max. voltage: 10 Vpp
    Active Input impedance: 500Kohm, max. voltage: 10 Vpp
    Output Power: 300W RMS at 8 ohms, 500W RMS at 4 ohms
    Voltage is factory preset for the U.S.

    Controls
    GAIN: ”80dB to +35dB range
    LINE OUT: Level control on front panel
    PRE/POST EQ (for line out): Switch on rear panel
    GROUND LIFT: Switch on rear panel
    MASTER VOLUME
    FOOTSWITCH: Mute, EQ bypass

    Equalization
    LOW
    Center frequency: 40-300Hz; level ±16dB
    LOW-MID
    Semi-parametric: frequency 100”800Hz, level ±16dB
    HIGH-MID
    Semi-parametric: frequency 700Hz ” 6kHz, level ±16dB
    HIGH
    Semi-parametric: 1.5-10kHz shelf; level ±16dB
    VPF (Variable Pre-shape Filter)
    Center frequency: 380Hz (cut)
    VLE (Vintage Loudspeaker Emulator)
    250Hz ” 20kHz cut

    Outputs
    EFFECT SEND
    Unbalanced, max. voltage 20 Vpp (pre-EQ)
    TUNER OUT
    Unbalanced, max. voltage 2 Vpp
    LINE OUT
    Balanced XLR, max. voltage 15 Vpp
    SPEAKER OUT
    Speakon, 1/4"

    Other
    Dimensions: 14.5"(W) x 3.39"(H) x 11.89"(D)
    2U tall
    19"(W) with rack ears
    Weight: 8.6lbs.
    Tubes: 1 x EECC81, 1 x ECC83 (JJ Electronic)
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