The OB1 splits the input instrument signal into two separate paths. One amplifies the clean signal, with all the clarity you would expect from Orange. The other adds stages of gain to the upper harmonics only, controllable via the amp’s Gain knob. These two elements are combined using the amplifier’s Blend control which adjusts the balance between clean and dirty. The Blend control can then be remotely engaged or defeated using the optional footswitch.
The Gain and Blend’s range allows for almost anything, from a subtle level boost to cut through the mix, added girth and presence at moderate settings to fatten up chorus passages, to fully saturated savagery at the extremes. However you dial it in, the OB1 always maintains the critical low end definition, right the way up to the most offensive settings!
The OB1’s highly responsive active three band EQ has been meticulously voiced for maximum effect and minimal fuss. The EQ section is located after the Gain and Blend in the circuit, allowing full tonal control over the entire range of sounds. The Bass and Middle controls feature +/-15dB of boost or cut, whilst there is a range of +/- 20dB on the Treble control.
The OB1 Series puts proper Class A/B power back on the map. All circuitry is completely analogue, ensuring these amps sound expressive and musical even at ridiculous gain levels.
The OB1 Series are our first rack mountable amps, suitable for 19″ cases. Enclosed in a rugged power coated steel chassis the fascia is finished in our classic ‘pics only’ styling