Boss PH-3 Phase Shift Guitar Effect Pedal

Product ID: 45083

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  • Produces anything from vintage to modern Boss phasing
  • Small, compact and robust enough to cope with touring demands
  • Control the rate in realtime via Expression Pedal input (optional)
  • Tap tempo sync of phasing effects
  • Choose from multi-stage phasers (4, 8, 10, and 12)
  • New Rise and Fall Effects in addition to standard up and down cycles
  • Step mode produces unique phasing tones
  • Powered by 9V battery or AC adaptor
  • Free 5 year warranty when registered with BOSS
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Delivery to UK mainland addresses* is FREE on orders over £75 and up to 30kg. (As a guide, a standard electric guitar weighs approx. 3-5kg).

Delivery on orders below £75 are charged at £4.45!

Delivery to Northern Ireland, the Scottish Highlands & Islands, Isle of Man, Isle of Wight and Channel Islands is weight dependant and will be indicated at the checkout

Delivery above 30kg to ANY location will vary according to weight and will be indicated at the checkout

LocationPriceStandard Delivery
UK mainland* FREE on orders over £75 £4.45 on orders under £75 1-3 working days
Northern Ireland, Scottish Highlands & Islands Isle of Man Isle of Wight Channel Islands £12.95 – any order value up to 30kg Over 30kg - please call 1-3 working days
Overseas Please call for details Please call

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For a flexible range of phasing effects, from vintage to modern, the PH-3 pedal by Boss has it all. Featuring new Rise and Fall modes, you are greeted with a large scope of phasing at your fingertips. The pedal is easy to use with a simple interface, while it is also small and compact enough to fit nicely in your pedalboard.


The PH-3 is kitted out with four main controls: Rate, Depth, Resonance, Stage (Rise, Fall and Step modes). Turn the Rate dial to control the speed of the modulation effect and you can go from a lamenting type sound right through to fast, warbling effects. Depth and Resonance control the depth and top part of modulation, but the really interesting effects come from the Stage dial. The Stage control features four separate stage phasers, 4, 8, 10 and 12, accompanied by Rise, Fall and Step modes. The new Rise and Fall modes are what really make this pedal stand out. The Rise and Fall controls provide unidirectional phasing, allowing your sound to continually rise or fall. The Step mode is a unique function that produces futuristic, computer-like effects.

There is a jack where you can plug in an expression pedal if you wish, which enables you to control the rate, filter and tempo all in real time using your foot. You can also dial in a Tap Tempo using the stompbox to play at your own manually chosen rate.

The Boss PH-3 Phase Shift is an impressive little pedal that gives you an abundant choice of unidirectional phasing effects.

ModelPH-3 Phase Shift Guitar Effect Pedal
Dimensions (H x W x D)59 x 73 x 129 mm
Nominal Input Level-20 dBu
Input Impedance1 M ohms
Nominal Output Level-20 dBu
Output Impedance1 k ohms
Recommended Load Impedance10 k ohms or greater
Residual Noise Level-92 dBu (IHF-A, Typ.)
ConnectorsINPUT Jack, OUTPUT Jack, EXP/CTL Jack, AC Adaptor Jack (DC 9 V)
Power Supply DC 9 V: Dry Battery 9 V type (6F22/9 V), AC Adaptor
Current Draw50 mA (DC 9 V)
Included AccessoriesDry Battery 9 V type (6F22/9 V)
Options (sold separately)AC Adaptor (PSA-Series)

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