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The Focusrite ISA One Microphone Preamp provides Focusrite's prestigious ISA transformer-based pre-amp in a rugged and portable chassis, at a groundbreaking price.
ISA One features the classic vintage microphone pre-amplifier topology from the original ISA110 module that formed the cornerstone of each channel on Focusrite's legendary Forte console. The preamp 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.
Focusrite ISA One Features
The same vintage preamp topology as their Forte console
Flexible Independent DI Channel
Four carefully selected input impedances
Headphone Output with Volume Control
Encased in a rugged and portable chassis
A variable impedance circuit has been added, allowing the user to switch between four carefully selected input impedance settings. In addition to the original ISA110 impedance, three further impedance settings allow perfect matching, or creative mismatching of the preamp with any microphone. ISA One also features an insert point, should the need arise to place extra processing between the preamp or D.I. and the optional converter. Phantom power, phase reverse and a 75Hz, 18dB/octave high-pass filter are also available from the angled front fascia.
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.
ISA One’s headphone output features a dedicated volume control, which delivers an external stereo cue mix, (a simple click track, or a stereo mix feed from an interface or a live console,) fed to the headphones via two TRS jack inputs on the rear of the unit.
Great preamp! I’ve had my eye on this for a while. Finally made the purchase and it’s staying in the studio. Currently have a space echo plugged into the send for some real time vocal fx. Very versatile for the studio!
Published date
01/22/25
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Josh H. 🇺🇸
Verified Buyer
Amazing! No noise
I almost purchased the Twinfinity but kept seeing reviews about how noisy it was. So I tried the ISA… just amazing
Published date
11/23/22
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Eric B. 🇺🇸
Verified Buyer
Top Notch
I love it. Wish I grabbed it a year before I did.
Published date
07/25/22
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Mauricio 🇺🇸
Verified Buyer
i love it,this gear is fantastic
the isa pre is fantastic the color that i get frome this gear realy change the sound in my studio i realy recomend this preamp
Published date
01/05/22
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Ashby M. 🇺🇸
Verified Buyer
Well worth the money
It is a great tool to get professional sounds with out having a million dollar budget
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