The new Focusrite ISA One – single-channel pre-amp
Posted on January 14, 2008
Filed Under Analogue Anarchy, What's In With Outboard? |
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Speaking of NAMM 2008, Focusrite’s new ‘ISA One’ microphone pre-amplifier is getting an airing at the industry trade show too. ISA One delivers Focusrite’s prestigious ISA transformer-based pre amp in a rugged and portable chassis, even if it does look like part of a Sci-Fi films set.
ISA 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 Forte console.)
The pre amp is featuresa 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.
Here’s how Focusrite roll:
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 pre amp with any microphone.
ISA One also features an insert point, should the need arise to place extra processing between the pre amp 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.
Oh, and it’s got a headphone socket with a dedicated volume control too, because it’s groundbreaking…
An optional stereo A-D converter is also available, which can be retrofitted at any time and provides two channels of 24 bit/192kHz A-D conversion with a dynamic range of 119dB.
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