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Markbass SD800 750W Bass Head

Item #: 
1274319726163   POS #:103836805
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The Markbass SD800 amp head is perfect for the times when you need speed and clarity at high volumes, especially in big-stage applications. This digital power amp delivers 750W of power into a 4 ohm c... Click To Read More About This Product

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The Markbass SD800 amp head is perfect for the times when you need speed and clarity at high volumes, especially in big-stage applications. This digital power amp delivers 750W of power into a 4 ohm cab or 450W into an 8 ohm cab. Recommended for use with big cabinets (8X10, 6X10, or 2X15), or two-cabinet rigs, this little solid-state head gives you plenty of headroom and has several options for protecting and shaping your sound, from its VLE (Vintage Loudspeaker Emulator) and VPF (Variable Pre-shape Filter) options to the Pre/Post EQ setting which allows you to choose whether your line out signal is affected by the amp's EQ. The SD800 Head has an input jack that can be used with either active or passive basses as well as dual Neutrik Speakon Combo jacks so you can connect to one or two speaker cabs using 1/4" speaker cables or Speakon cables.


  • Solid state digital power preamp
  • Delivers 750W of power into a 4 ohm cab, 450W into an 8 ohm cab
  • 1/4" input jack works with active or passive basses
  • Gain and master knobs
  • XLR line out
  • Vintage Loudspeaker Emulator filters out high frequencies
  • Variable Pre-shape Filter boosts lows (around 35Hz and highs (around 10kHz), and cuts mids at 380Hz
  • Dual Neutrik Speakon Combo jacks allows it to be connected to one or two speaker cabs using 1/4" speaker cables or Speakon cables
  • Two balanced XLR output
  • Pre/Post EQ switch to determine whether signal is affected by EQ settings or not
  • Ground lift button for eliminating hum from grounding problems
  • Unbalanced tuner out lets you tune as you play without passing your signal through your pedals
  • Send Effect and Return Effect means you won't lose signal if something in your effects chain dies while playing
  • 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
  • Input impedance: 500Kohm, max. voltage: 9 Vpp
  • Effect return impedance: 33Kohm, max. voltage: 12 Vpp
  • Output Power: 450W RMS at 8 ohms, 750W RMS at 4 ohms
  • Voltage is factory preset for the U.S.
  • GAIN: ”80dB to +25dB range
  • LINE OUT: level control on front panel
  • PRE/POST EQ (for line out): switch on rear panel
  • GROUND LIFT: switch on rear panel
  • LOW
  • Center frequency: 40 Hz; level ±16dB
  • Semi-parametric: frequency 100”800 Hz, level ±16dB
  • Semi-parametric: frequency 700 Hz”6 kHz, level ±16dB
  • HIGH
  • 10kHz shelf; level ±16dB
  • VPF (Variable Pre-shape Filter)
  • Center frequency: 380Hz (cut)
  • VLE (Vintage Loudspeaker Emulator)
  • 250Hz ” 20kHz cut
  • Unbalanced, max. voltage 12 Vpp (pre-EQ)
  • Unbalanced, max. voltage 2 Vpp
  • Balanced XLR, max. voltage 25 Vpp
  • Speakon, 1/4"
  • Dimensions: 14.5"(W) x 3.39"(H) x 11.9"(D)
  • 2U tall
  • 19"(W) with rack ears
  • Weight: 7.5lbs.
Customer Reviews

Review Snapshot

by PowerReviews

(based on 3 reviews)

Ratings Distribution

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Reviewed by 3 customers

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(18 of 21 customers found this review helpful)


Markbass SD800

By Mike

from White Bear Lake, Minnesota

Incredible Amp! This thing gives me the sound I have been desperately looking for. Plenty of volume and headroom while weighing only around 7 pounds. The EQ on this amp is simple but very powerful and the extra mid controls are amazing. Since there are no Cons for this amp I will list the Pros: 1.Power 2.Weight 3.Mids control 4.multiple output connectors 5.Well built. Well worth the price.

(14 of 15 customers found this review helpful)


Everything I needed and more!

By James Matthews

from Memphis, Tennessee

The Markbass SD800 is the head of the future. Its simplistic approach with tone control makes it incredibly user friendly. I often just leave my eq flat and make slight adjustments to the MidHigh/MidLow boosters as needed before a song. This amp will play true to what you and your bass naturally sound like. It will not muddy or cover up your playing at all, and it will allow you to show every bit of soul you put into your playing. The VLE and VPF filters, however, are a wonderful addition that will allow you to add some texture to your tone and will create some interesting effects on your sound. The best thing about this amp though, must be the fact that it ways only 7lbs. At this weight, I often just throw the amp in my backpack and forget about it. There are only two downsides to this amp that should be standars: a headphone jack and a mute switch. The mute switch is no problem for me because my cables have kill-switches, however, the lack of a headphone jack is a let down. Even with these 'missing' features, this head is still a wonderful example of how heads should play and sound: simple, natural, and full of bassy goodness. Three words: Get this amp!

(8 of 9 customers found this review helpful)


Awesome head!

By IIWAG bassist

from Bellevue, WA

Luckily, I was able to get a GREAT deal on this head used at GC, because it is a bit pricey. But WOW,this head is great! I'm using it was the Mesa Powerhouse 2x12 cab and it sounds amazing! It's very boomy which for me is perfect. There is so much stuff you can do to EQ it for your own way, so for that reason(and the fact it sounds great for me, I reccomend this to any bassist who wants a powerful, great sounding head!

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