The OR15 is a compact single-channel guitar head built around an all-valve signal path. It is modelled on Orange's early-1970s 'Pics & Text' amps and aims for a mid-rich British voicing that covers clean tones, blues, classic rock and modern grit.

Controls are kept to gain, bass, middle, treble and volume. A switch drops the output from 15 W to 7 W RMS, giving natural power-amp breakup at lower volumes for home playing or recording. The effects loop is driven by its own valve (an ECC81/12AT7) so pedals such as reverbs, delays and modulation stay clear and full.

Valve complement is two EL84 in the power stage and three ECC83/12AX7 in the preamp. The speaker output offers 1x16 Ω, 1x8 Ω or 2x16 Ω options. The head has a plexi-style faceplate with pics-only legends and comes in Orange or Black finishes. FS-1 and FS-2 footswitches are listed as optional extras.