The Orange OB1-500 is an Analog Bass Amplifier Head - 500W. The key to the OB1’s unique sound is our footswitchable 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 all-out filthy grind, and everywhere in between. OB1-500 shares the same layout and 2U rack dimensions as the less powerful OB1-300, coupled to a full fat 500 Watt output section to move some serious air.
BI-AMP Inspired Design
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 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 Analogue Signal Path
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
Type: Solid State
Number of Channels: 1
Total Power: 500W
Inputs: 1 x 1/4"
Power Source: Standard IEC AC cable
Weight: 22.26 lbs.
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