Orange Amps OB1-500 Analog Bass Amp

The OB1-500 derives its unique sound from its foot-switchable blend circuit which adds a veneer of controllable gain and increased harmonic content to the upper registers of the input signal. The lower frequencies and clean signal are left alone, staying warm and clear just as they would be in a ‘bi-amped’ setup. Depending on where the gain and blend controls are set, the possibilities are limitless. Punch in the blend control to achieve anything from a transparent clean boost to an all-out filthy grind, and everywhere in between.

Bi-Amp Inspired Design

The OB1-500 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!

Active EQ

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.

All Analog Signal Path

The OB1 Series puts proper Class A/B power back on the map. All circuitry is completely analog, ensuring these amps sound expressive and musical even at ridiculous gain levels.

Rack Mountable

The OB1 Series is Orange's first rack-mountable amp, suitable for 19-inch cases. Enclosed in a rugged powder-coated steel chassis the fascia is finished in a classic ‘pics only’ styling.