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Focusrite ISA One - Classic Single Channel Preamp with Independent DI
The ISA One microphone pre-amplifier delivers Focusrite's prestigious ISA transformer-based pre-amp in a rugged and portable chassis, at a groundbreaking price. SA One features the classic vintage microphone pre-amplifier topology from the original ISA110 module, including the Lundahl L1538 transformer and bespoke zobel network. (The original 110 pre amp formed the cornerstone of each channel of Focusrite's legendary Forte console.) The pre-amp is complemented by a line input (XLR and TRS Jack) and an independent D.I. channel, complete with dedicated gain control, active or passive impedance switch, a TRS Jack output for routing to an amp and an independent XLR output on the rear. This flexible independent D.I. makes the ISA One ideal both for engineers wishing to blend a D.I.’d guitar signal with a mic’d guitar cabinet, and for demanding performers who require a single classic solution for both guitar and vocals.
Independent input metering for both channels is provided in the form of a moving coil VU meter with variable calibration to suit analogue and digital recording media, alongside two six-LED peak meters; inputs can be metered either pre- or post-insert. The meter calibrations utilise all the same reference points as Digidesign's Pro Tools HD system, allowing effortless line-up. The Focusrite pre amp is renowned for its transparency, but there's also that subtle warmth that transformer core saturation contributes. This seeming contradiction of warmth plus beautifully open, unrestricted high frequencies, is a classic hallmark of the mid 80's Focusrite designs. With processors whose bandwidth is strictly limited to the audible (20Hz to 20kHz) bandwidth alone, significant roll-off can still occur, affecting the higher audible frequencies of the signal. Therefore, in order to capture every subtle nuance, exactly as it occurs whilst avoiding any roll-off, the pre-amp must operate over a far greater bandwidth. The extremely broad frequency response of Focusrite pre-amps - close to 200kHz at the top end - guarantees accurate phase response across the much narrower range of human hearing, the roll-off point being moved entirely outside of the audible hearing range.
Shipped in beautiful Hard case.
$ 550.00
(save 39% off RRP)
(shipping $19.00)
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Specifications Features
- ISA Series Transformer-based Pre-amplifier
- Flexible Independent D.I. Channel
- Switchable Impedance
- Headphone Output with Volume Control
- Dedicated Insert Point
- Optional Stereo 192kHz ADC
Analogue Channel Inputs
- 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
Analogue Channel Outputs
- Send: TRS Jack x 1
- Balanced line output: XLR x 1
- DI output: XLR x 1
- DI through: TS Jack x 1
Analogue Channel Additional I/O
- Cue mix left input: TRS Jack x 1
- Cue mix right input: TRS Jack x 1
- Headphones output: ¼” TRS Jack x 1
Weight
- 3.9kg
- 8.6Ibs
Dimensions
- 220mm (W) x 104mm (H) x 254 - 290mm (D - top to bottom)
- 8.66" (W) x 4.1" (H) x 10" - 11.4" (D - top to bottom)
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