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Focusrite proves that what was old is new again with the ISA One. Built
on the topology of the original ISA 110 including the Lundahl L1538
transformer and bespoke zobel network, the ISA One continues the legacy
of the legendary Forte console. There's a mic/line input as well as a
DI input with a variable impedance selector for sonic coloration, all
packaged in an ultra-portable desktop unit. Packing the same amazing
sound that put the Forte on the map all those years ago, the ISA One is
poised to be a huge hit.
Legacy
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 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 miked guitar cabinet, and for demanding
performers who require a single classic solution for both guitar and
vocals. Both the D.I. channel and the mic pre can be used
simultaneously - very cool!
Modern advancements
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.
Other features
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.
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 utilize
all the same reference points as Digidesign's Pro Tools HD system,
allowing effortless line-up.
Outputs
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.
An optional state-of-the-art stereo A-D converter is also available,
embodying cutting-edge conversion technology seated within Focusrite's
custom analogue circuitry. This optional card can be retrofitted at any
time and provides two channels of 24 bit/192kHz A-D conversion with a
dynamic range of 119dB.
Focusrite ISA One Features:
- Single Channel Original ISA Series Pre Amp in a portable metal Chassis
- Flight case included
- Selectable impedance, perfect for matching with any microphone
- Direct Instrument inputs including high and low impedance options to provide a comprehensive DI solution
- Classic VU meter, Ladder LEDs too-all manner of metering, at source
- Cue mix stereo inputs
- Certificate of origin hand-signed by Phil Dudderidge included
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