Tube warmth and analog clarity.

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.

Markbass TA503 500W Bass Amp Head 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
• Rigid 2mm thick aluminium chassis for a long-lasting finish

Enhance your sound with this top-notch preamp head. Order one today!

Markbass TA503 500W Bass Amp Head 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)