Focusrite ISA One Classic Pre-Amp

Product ID: 98987

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  • FREE BIAS FX LE and BIAS Amp LE with reverb bundle if you purchase and register with Focusrite before the 1st of February
  • Rugged and portable transformer-based pre amp for premium recording
  • XLR TRS jack combo line in for use with microphones and instruments
  • Independent DI channel
  • Classic VU meter accurately displays signal levels
  • Huge 10 Hz to 100kHz frequency response range
  • Headphone out with dedicated volume control
  • Headphone connectivity for personal monitoring
  • Includes Focusrite's award winning pre-amp technology
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Delivery & Returns

Delivery to UK mainland addresses* is FREE on orders over £75 and up to 30kg. (As a guide, a standard electric guitar weighs approx. 3-5kg).

Delivery on orders below £75 are charged at £4.45!

Delivery to Northern Ireland, the Scottish Highlands & Islands, Isle of Man, Isle of Wight, Channel Islands and the Republic of Ireland. is weight dependant and will be indicated at the checkout

Delivery above 30kg to ANY location will vary according to weight and will be indicated at the checkout

LocationPriceStandard Delivery
UK mainland*FREE on orders over £75 £4.45 on orders under £751-3 working days
Northern Ireland, Scottish Highlands & Islands Isle of Man Isle of Wight Channel Islands Republic of Ireland£12.95 – any order value up to 30kg Over 30kg - please call1-3 working days
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Focusrite's pre-amps are amongst some of the most legendary in the world and the Focusrite ISA One Classic Pre-Amp With Digital A/D Card is here to further testify to this. Completely rugged and portable, the Focusrite ISA One Classic Pre-Amp's chassis plays home to technology that originates from the ISA110 module.

Varied connectivity

The Focusrite ISA One preamp is complemented by a line input and an independent DI channel, with a dedicated gain control, active or passive impedance switch, a TRS Jack output for sending to an amp and an independent XLR output on the rear panel. It also has a variable impedance circuit, allowing the user to switch through 4 carefully selected input impedance settings. As well as the original ISA110 impedance, 3 further impedance settings allow perfect matching, or creative mismatching of the preamp with any microphone to hand.

Classic design, modern power

The Focusrite ISA One Classic Pre-Amp also features an insert point, should you need to place extra processing between the preamp or DI and the optional converter. Phantom power, phase reverse and a 75Hz, 18dB/octave high-pass filter are also easily available from the 45 degree angled front panel.

A a moving coil VU meter offers independent input metering for both channels with variable calibration to suit analogue and digital recording sources. Alongside two six-LED peak meters, inputs can be metered either pre- or post-insert.

ModelISA One
Dimensions (HxWxD)104 x 220 x 290mm
Weight8.6lbs (3.9Kg)
Connectivity Intputs:
  • Mic input: XLR x 1
  • Line input: XLR x 1 and TRS x1
  • Instrument input TRS Jack: XLR x 1
  • External ADC input: TRS Jack x 1
  • Return: TRS Jack x 1
  • Send: TRS Jack x 1
  • Balanced line output: XLR x 1
  • DI output: XLR x 1
  • DI through: TS Jack x 1
Other Connections:
  • Cue mix left input: TRS Jack x 1
  • Cue mix right input: TRS Jack x 1
  • Headphones output: ¼” TRS Jack x 1
Dynamic Range10dB to 40dB continuously variable
Frequency Response
  • @ 10dB gain with -10dB input = 10Hz-100kHz +/- 0.6dB
  • @ 40dB gain with -40dB input = -2.5dB down at 10Hz and 0dB at 100kHz
Signal To Noise Ratio0dBFS (+22dBu) = 118dB

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