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Bass Chorus Deluxe with Flanger and X-Over


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Product Description for the MXR M83

The MXR Bass Chorus Deluxe is powered by pure analog bucket-brigade technology, serving up shimmering, liquid chorus and swooshing, metallic flanger effects while preserving the punch and fundamental of your low end.

The Bass Chorus Deluxe features top-mounted Flanger and X-Over buttons with LED status indicators. In X-Over Mode, modulation in low frequencies is decreased at 100Hz—perfect for playing upper register chords, melodies and fills while keeping the low end in tune. With Bass and Treble controls you can cut or boost lows and highs and shape the tonal character of the effect. For a wide stereo sound, select the TRS (tip-ring-sleeve) Stereo Hardwire Bypass Mode via an internal switch. In this mode, you can use a TRS to TS (tip-sleeve) Y-splitter cable to send the effect signal to two different amplifiers, allowing the modulation to move from left to right.

The Bass Chorus Deluxe joins the ranks of award-winning pedals in the MXR Bass Innovations line, each designed by bass players for bass players.



  • Chorus and Flanger modes
  • Analog bucket brigade technology
  • Separate Bass and Treble controls for detailed tone sculpting
  • X-OVER mode for increased low end clarity
  • Constant Headroom Technology


The MXR Bass Chorus Deluxe is powered by one 9 volt battery(remove bottom plate to install) or a 9 volt power supply such as the Dunlop ECB003/ECB003E AC adapter.


  • Run a cable from your bass to the Bass Chorus Deluxe’s Input jack and run another cable from the Bass Chorus Deluxe’s Output jack to your amplifier.
  • Chorus is the default mode. To use Flanger mode, press the FLANGER switch. To engage X-Over mode and decrease modulation on low end frequencies, press the X-OVER switch.
  • Start with all controls at 12 o’clock.
  • Turn the effect on by depressing the footswitch.
  • Rotate the BASS knob clockwise to boost low end frequencies or counterclockwise to cut them.
  • Rotate the TREBLE knob clockwise to boost high end frequencies or counterclockwise to cut them.
  • Rotate the INTENSITY knob clockwise to increase modulation intensity or counterclockwise to decrease it.
  • Rotate the RATE knob clockwise to increase modulation speed or counterclockwise to decrease it.
  • Rotate the WIDTH knob clockwise to increase the modulation sweep range or counterclockwise to decrease it.
  • An internal switch selects TRS (tip-ring-sleeve) Stereo Hardwire bypass or Mono True bypass. Factory set to Mono True bypass.


  • Input Impedance : 2 MΩ
  • Output Impedance
  • TIP (Mono) : 600 Ω
  • RING (Stereo) : 3.3 KΩ
  • Max Input Level* : 1 kHz/+10 dBV
  • Max Output Level : +13 dBV
  • Frequency Response : 20 Hz to 20 kHz/±1 dB
  • Signal to Noise Ratio* : >96 dBV
  • Tone Controls (Delay Signal Only) : +8 dB, -11 dB, 100 Hz (BASS)
  • -2 dB, 100 Hz (Center Position BASS)
  • ±14 dB, 10 kHz (TREBLE)
  • X-OVER Control : +7.5 dB, 20 Hz/+3 dB, 100 Hz (Dry Signal) -18 dB, 20 Hz/-3 dB, 160 Hz (Delay Signal)Rate Control 0.1 Hz to 10 Hz
  • Maximum Delay Time : 12 ms
  • Minimum Delay Time : 400 µs
  • Delay Noise Reduction : 2:1 ratio
  • Bypass
  • Mono : True Hardwire
  • Stereo : Hardwired
  • Current Draw : 30 mA
  • Power Supply : 9 volts DC
Brand MXR
Weight 0.6500
Dimensions (WxHxD) No

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