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Product 481747

Markbass R500 500W Bass Amp Head   

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The Markbass R500 is a bass amplifier head that will have you rocking out old-school, rocking hard, creating your own alternative rock, or shredding ...Click To Read More About This Product

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A high-powered analog bass head made for bassists who just want to rock.

The Markbass R500 is a bass amplifier head that will have you rocking out old-school, rocking hard, creating your own alternative rock, or shredding up the stage stealing the spotlight from your guitarists! The 500W analog R500 amp (at 4 ohms; 300W at 8 ohms) features a tube preamp that will break up just the way you want it to, and a newly designed limiter that produces glorious distortion instead of cramping your style. The simple 4-band EQ gives you all you need to access a wide range of sounds for any genre. As far as controls, the Gain knob is for the amount of tube overdrive, whereas the Master knob is for your volume.

  • Analog amp with a tube preamp which provides 500W at 4 ohms; 300W at 8 ohms
  • 1/4" input jack works with passive or active basses
  • Gain knob controls tube overdrive
  • Master knob controls volume
  • Line out controls rear XLR line out volume level
  • 4-band EQ: Low, Low Mid, High Mid, HIgh
  • Neutrik Speakon Combo out jacks for use with 1/4" or Speakon speaker cables
  • Balanced XLR line 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

R500 500W Bass Amp Head

  • Power
    Input impedance: 500Kohm, max. voltage: 9 Vpp
    Effect Return impedance: 33Kohm, max. voltage: 12 Vpp
    Output Power: 300W RMS at 8 ohms, 500W RMS at 4 ohms
    Voltage is factory preset for the U.S.

    GAIN: ”80dB to +25dB range
    GROUND LIFT: Switch on rear panel
    Optional footswitch: mute

    Center frequency: 80Hz; level ±12dB
    Center frequency 400Hz, level ±12dB
    Center frequency 800Hz, level ±12dB
    3kHz shelf; level ±12dB

    Unbalanced, max. voltage 12 Vpp (pre-EQ)
    Unbalanced, max. voltage 2 Vpp
    Balanced XLR, max. voltage 25 Vpp
    Speakon, 1/4" x 2

    Dimensions: 8.16"(W) x 3.39"(H) x 11.89"(D)
    Weight: 8.16 lbs.

Review Snapshot

by PowerReviews
MarkbassR500 500W Bass Amp Head

(based on 2 reviews)

Ratings Distribution

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  • 4 Stars



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  • 1 Stars



Reviewed by 2 customers

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(1 of 1 customers found this review helpful)


it well umm ROCKS!

By larryvegas

from canada

About Me Professional Musician


  • 14 Inch And Speakon Plug
  • Clear Pick Bass Tone
  • Easy To Use
  • Excellent Sound
  • Good Warmth
  • Loud Thump
  • Portable
  • Powerful


  • None So Far

Best Uses

  • Bar Club Gigs

Comments about Markbass R500 500W Bass Amp Head:

after owning MANY of the new "micro" heads im back to the R500.
I play mostly with a pick and find this head is tuned well for it. clean thick deep thump with the slight highs to cut and breathe into the mix of a full rock band.
Not everyones cup of tea but for me Its ideal!

(1 of 3 customers found this review helpful)


not a tube head

By Calaverasgrande

from Oakland Ca

About Me Professional Musician

See all my reviews


  • Portable


  • Limited Functions

Best Uses

  • Performances

Comments about Markbass R500 500W Bass Amp Head:

This is a pretty decent sounding head though the LPF (VLE) is kind of hard to get used to. Otherwise the EQ is decent.
This doesn't really capture the tube vibe for me.
I think for that you need a real tube EQ and a tube preamp. One or the other by itself doesnt really give enough warmth.

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