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Focusrite ISA 430 MKII

Signal Processors is a single input analog channel strip that brings together all of Focusrite's classic processor designs in one comprehensive production tool. Apart from the microphone preamp, the Focusrite ISA 430 MKII unit is augmented with a compressor, limiter, EQ, de-esser and gate, alongside very comprehensive internal routing and connectivity.

The ISA 430 MKII enables today's recording professional to enjoy the unique sonic contribution of these heritage designs within a single, extremely versatile processor.

Features

Classic Focusrite transformer-based Mic-pre with variable impedance and "Air" feature

Focusrite ISA 430 MKII multi format compressor that switch between Focusrite's transparent VCA circuit and a vintage optical circuit

Unmatched flexibility with an incredible variety of insert points and variable signal path arrangements

Ability to function as three separate modular processors - microphone preamp, EQ and dynamics

Precision VU metering of input level, insert 1 or 2 return level, compressor gain reduction or sidechain listen level (switched)

Classic Focusrite EQ design of Focusrite ISA 430 MKII based around an expanded version of the original ISA 110

Focusrite ISA 430 MKII's post microphone preamp output for the shortest possible signal path

"Listen" feature for precise control over compression, gating, expansion and de-essing

De-esser design based on optical technology for lower distortion and transparency

Specification

Line
- Gain Range: +10dB to +40dB continuously variable
- Input Impedance: >1MO
Mic
- Gain Range: 0 to +60dB in 10dB steps
- Input Impedance: Variable as follows: 600O, 1400O, 2400O, 6800O
- EIN: -128dB with 150O terminating impedance at 60dB of gain
- Noise: -97dBu
- THD: 0.001% with -20dBu 1kHz input and 20Hz¡§C22kHz bandpass filter>
Compressor (VCA mode)
- Threshold Range: -28dB to +12dB
- Ratio: 1.5:1 to 10:1
- Slope: Soft knee
- Attack: 100?S to 100mS
- Release: 100mS to 7S, variable or auto (program dependent)
Compressor (Vintage Opto mode)
- Threshold Range: -28dB to +12dB
- Ratio: 1.5:1 to 5:1 in Comp mode
- 5:1 to 20:1 in Lim mode
- Slope: Soft knee in Comp mode,
- Hard knee in Lim mode
- Attack: Fixed
- Release: Fixed
Gate
- Threshold Range: -40dB to +10dB
- Gate Range: 0 to -80dB
- Attack: switched fast or slow
- Release: 100mS to 5S
- Hold: 20mS to 4S
- Expander Ratio: 0 to 5:1
De-Esser
- Threshold Range: 22dB
- Frequency Range: 2K2 to 9K2
- Ratio at centre frequency: 2:1
Limiter
- Threshold Range: 20dBu
- Ratio: infinite (Brick Wall)
- Attack: Frequency dependent

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Number of Reviews: ( 6 )
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Write Your Buying Experience

01/17/2012 - Both clean and processed versions of the input signal can be recorded easily to DAW, if required, and I think this is an excellent facility.

Rating:

[5 of 5 Stars]

-- Vincent Bates

10/25/2011 - It never ceases to amaze me how designers always seem to improve on the original. The Focusrite 430 is an amazing unit that’s been praised all over, and is in use constantly, so how could the designers even begin to improve on something that good? From the moment I was informed of the existence of the ISA 430 MKII, I waited with baited breath for the review model to arrive, and the opportunity to find out for myself.

Rating:

[5 of 5 Stars]

-- Dan Boyfield

10/09/2010 - It all sounds fabulous as expected. The button pushes click nicely, often produce a satisfying relay click, and all statuses are clearly displayed with LEDs.

Rating:

[4 of 5 Stars]

-- Cooper LeCroy

07/08/2010 - In the Focusrite tradition, the ISA 430 MKII sounds wonderful. The box has tremendous clarity and detail and is extremely clean and quiet. The EQ is both musical and powerful and the compressor and de-esser are quick and easy to use, and they sound extraordinary.

Rating:

[5 of 5 Stars]

-- Carlos Talbergs

06/25/2010 - I had fantastic results using the ISA 430 MKII to record vocals. I used the unit with the Sony C-800G, the BLUE Cactus and Bluebird and the Brauner VM-1KHE, and every instance had pleasing results. I found that the vintage compressor mode worked extremely well with vocals, especially when using a tube microphone. Plus, the de-esser worked substantially better than my old faithful dbx 902.

Rating:

[5 of 5 Stars]

-- Jon Roberts

06/14/2010 - There was never any doubt in my mind (or I suppose anyone else’s) that the ISA 430 MKII was going to be something special. Taking the features of the original unit and adding all the new tweaks and technologies that the Focusrite back-room boys have developed, subsequently has resulted in just about the best possible recipe for a producer channel. This is the kind of device that mere mortals will gladly die for, but only after they have enjoyed using it for a few decades, naturally! Although we are still talking serious professional gear prices, this is a very attractively priced unit in US, offering even better value for money than the original, with a stunningly high-quality, comprehensive and extraordinarily flexible package.

Rating:

[5 of 5 Stars]

-- bill loflin

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