In very good, used condition with minor case scratches. All knobs & switches are original. Supplied with a new UK 220 Volt external 9V DC power supply. EU adaptor available on request. Tested & working 100%. Photos show a Phaser sold previously

Boss has created some of the best chorus & phaser effects units in world, including the Boss CE-1, CE-300 and the original JC-120 guitar amp

The RPH-10 Phaser is a half-width rack unit from the 1980s Boss Micro Rack range. It has three settings for six, ten or 12 stages of phasing

It has one input and one output. When using the RPH-10 for recording or mixing I'd recommend trying on an insert or feeding it from an effects send and recording the return

When you look harder at the RPH-10 it becomes clear that a lot of thought went into the design of the Micro Rack series. The power supply has a loop-through connector so units can be daisy-chained. There's a footswitch socket for effect bypass. Inputs & outputs are on phonos as well as mono jacks and there's a rear-panel switch to shift the nominal operating level between -10 and -20 dBm

Front panel controls are straightforward: Manual sets the centre frequency of the phase shift, rate sets the speed of phasing and depth sets the strength of the effect. The feedback control allows a much deeper effect with more pronounced resonance

Keys to the depth of the chorus effect are depth and resonance but the character is set by the three-way stage setting

Technical
The RPH-10 has one input and output. Inputs & outputs are on phono sockets and jack sockets and there's a rear-panel switch to shift the nominal operating level between -10 and -20 dBm. It uses an external 9 VDC power supply (included)

Condition
In very good, used condition with minor case scratches. All knobs & switches are original. Supplied with a UK 220 Volt external 9V DC power supply. EU adaptor available on request. Tested & working 100%. Photos show a Phaser sold previously