Features
These were discontinued, we had enough for a few years and sold them. But some more became available in 2021 so we grabbed them, but they are now sold out, sorry!
Shown above with optional true bypass, LED, power jack, and Uni-Vibe/Phase-45 toggle switch.
Authentic tried-and-true components and hardware such as a Carling switch, CTS pot, and Switchcraft jacks.
A Uni-Vibe is a specific type of phaser, so with some tweaks the Phase-45 can do a decent emulation of the Uni-Vibe tones.
We can add a toggle to switch between stock Phase-45 and Uni-Vibe sounds for $25 along with the true bypass option,
or $45 without the true bypass option. It will sound like most of the other small 9V Uni-vibe pedals on the market
but not exactly like the higher end pedals like the Mojovibe, Ultravibe, etc. See the picture above for where we can mount
the switch and put a note in the ORDER COMMENTS area if you have a preference.
A Uni-Vibe is a phaser,
so the toggle switch change is a SUBTLE difference in the sweep. P45 mode is a normal balanced
sweep, the Uni-Vibe mode has a dual sweep, with the LOWS and HIGHS on two different, alternate sweeps.
That's what give the Uni-Vibe it's distinct pulse. But don't expect a huge change in tone. If you want JUST the
univibe setting, we can do that at no extra charge along with the bypass mod, just put a note
in the ORDER COMMENTS AREA that you want fixed uni-Vibe setting.
We can also add a MIX knob to the phase-45 but it's not really needed to keep your tone pure, as this pedal does not change your tone as much as the Phase-90 or 100. Mix knob will have maximum thick effect at normal 12:00 setting. Turning it up will have less dry sound, more of a vibrato sound, but not as intense due to less blending of wet and dry. Turning it down will reduce the effect. Below is the mix knob, with True Bypass, Power jack, and LED:
In 2017, Marc Ford needed something swirly that did not change his tone like most modulation pedals. I recommended this modified Phase-45 and he put it on his board and toured the world with it for the Magpie Salute with Rich Robinson and Sven Pipien of the Black Crowes.
The MXR CSP105 Vintage '75 Phase 45 pedal reissues the rare little
brother of the Phase 90 to exacting specifications. With 2 stages of
phasing, the Phase 45 guitar pedal offers up its subtle and musical
voice via hand-matched FETs and a hand-wired circuit board.
The
MXR Phase 45 phaser pedal is equipped with a bypass footswitch and a
speed knob. Rotating the speed knob in a clockwise motion results in a
faster phase effect, and turning it counterclockwise slows it down. The
MXR phaser pedal is powered by a single 9v battery, accessed by
removing the stompbox's bottom plate. Texture your tone without
overpowering your sound with the limited-edition Vintage '75 Phase 45
phaser pedal.
These sound very cool, sort of have the pulse of a UNI-VIBE... not as swooshy as the phase-90.
MXR Custom Shop CSP105 Vintage '75 Phase 45 Phaser Guitar Effects Pedal Features:
- Bypass footswitch
- Optional true bypass, with or without LED.
- optional Boss style power jack
- Speed knob
- Hand-wired circuit board built with original-spec 1975 components
- Original high-quality Switchcraft Input/Output jacks and Carling bypass switch
- Hand-selected FETs, matched to produce deep and rich phasing
- All-analog circuitry for warm analog tone
MXR Custom Shop CSP105 Vintage '75 Phase 45 Phaser Guitar Effects Pedal Specifications:
- Input impedance: 500 kOhms
- Output impedance: 5 kOhms
- Max input level: -5 dBV
- Signal-to-noise ratio: >96 dB
- Phase shift range: 360 degrees
- Bypass: hardwire
- Current draw: < 1 mA
- Power supply: 9 volt battery
Volume Trimpot Option
Some people notice an apparent volume drop (or some hear a boost) when the Phase-45 is turned ON. It may be even worse with a true bypass mod, as the OFF sound will be totally clear and unchanged from what is seen at the input. We can add a small trimpot on the board so you can set the ON volume where you want it, even a little volume boost if desired.
Note : Mod and option prices are cheaper when you buy the pedal from us, see mod form for prices on sending in your pedal for a mod.
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I love it! Not too much phasing.. just right. 
