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SWR WorkingPro 400 Bass Amplifier  

Product #481991

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Item Note:

This product has been discontinued but may be available as a Open Box item.

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The power and features required by today's gigging bassist.

The rackmountable, 2U SWR WorkingPro 400 Bass Amplifier head delivers 400W @ 4 ohms. For tone shaping it combines a 4-band EQ with variable mids, SWR's Aural Enhancer circuitry, and a Bass Intensifier that boosts and compresses the lows. Other pro features include preamp gain and master controls, automatic limiter with defeat switch, blend control for sidechain effects, XLR balanced pre/post output, and footswitch for Intensifier and mute.

  • 400W @ 4 ohms; 250W @ 8 ohms
  • -10dB pad option on input
  • Mute switch (footswitchable)
  • Independent preamp gain and master volume controls
  • Exclusive SWR Aural Enhancer tone control
  • 4-band active EQ with variable midrange
  • Bass Intensifier with level and frequency cutoff controls (footswitchable)
  • Automatic limiter with defeat option
  • XLR balanced output with pre/post switch, ground lift and -10dB switch
  • Side-chain effects loop with blend control
  • Tuner out jack
  • Unbalanced line out jack
  • Headphone jack
  • Footswitch jack for included 2-button switch (switches Intensifier and mute)
  • 2 - 1/4" and 2 Speakon speaker jacks
  • 5-year transferable warranty

Step up to SWR. Order today.


WorkingPro 400 Bass Amplifier Specifications:

  • 400W @ 4 ohms; 250W @ 8 ohms
  • 19"W x 3-1/2"H x 13-1/2"D
  • 25 lbs.
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SWRWorkingPro 400 Bass Amplifier

(based on 1 review)

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Reviewed by 1 customer

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(1 of 2 customers found this review helpful)


WorkingPro 400


from New Jersey

Comments about SWR WorkingPro 400 Bass Amplifier:

The WP 400 is a great sounding 400watt bass head. I use this along with the WP 1x15 cab and the WP 2x10 cab. Both cabs are at 8ohms, so when i run them together, I get a 4ohm load which gives me the full 400 watts of power. And it's enough to keep up with a rock band. (drummer, 2 guitars, one using a half-stack even). SWR is a great product that's got it's name back and going to be a dominant force in BASS AMPS once again, very soon.

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