MXR Variphase CSP-001

The Variphase CSP-001 is MXR's take on placing a Phase 90 phaser into a wah enclosure to allow you to change the rate with your foot. While this pedal is based on the Phase 90 it is also a modified version so some of our more popular MXR Phase 90 mods (like the script mod) do not apply to this pedal.

This pedal has a massive volume boost when activated even when the volume knob is at its lowest setting. Our Unity Gain Mod reduces the overall gain and allows you to match the bypassed volume level. If you're feeling adventurous (and can solder) we do have a DIY kit available in our store.

Some people do not like the auto-off feature that this pedal comes with. If you look at the photo below you can see a before and after of the underside of the treadle. In its stock form the pedal has a springing mechanism which forces the pedal to the "heel down" position which triggers a small bypass switch at the base of the pedal. Our Auto-Off Removal modification removes this function and installs a torsion block so you can adjust how easily the treadle rocks back and forth. In addition to this we install a normal stompswitch (not yet installed in the photo below) which is activated by pressing your toe down as you would to activate any standard wah pedal. This process involves replacing the spring mechanism with the torsion block, replacing the auto-off switch for a real stompswitch, and installing a status LED to indicate if the pedal is bypassed.

The Intensity Knob allows you to decrease the strength of the phaser.

The Phase 45 mod replicates the more subtle tone of the MXR Phase 45. This modification involves installing a toggle switch to select either a Phase 45 tone or the stock Phase 90 tone. The mod does not convert the pedal to a 100% replica of a Phase 45 but it does closely approximate the tone of the more subtle tone of the Phase 45 which cannot be simulated by simply using an Intensity control.

Unity Gain Mod...................................................................... $25
Unity Gain DIY Kit.................................................................. $10
Auto-Off Removal w/ LED...................................................... $70
"Phase 45" Toggle Switch...................................................... $35
Intensity Knob (external)........................................................ $30