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Focusrite ISA428 Pre Pack 4-Channel Microphone Preamp

Time-honored Class A design. 4 channels of cutting-edge 192 kHz A/D conversion - or 8 channels with an additional ISA428. (40) Read 2 reviews for this product | Rate and Review This Product
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Product Description

The ISA 428 Pre Pack is the perfect multi-channel front end for any professional DAW. Four classic Focusrite transformer-based pre amps with switchable impedance and direct instrument inputs. An optional eight channel 192kHz ADC, preceded by the all new proprietory Soft Limiter circuit, provides the perfect path into your Pro Tools HD system.

The benefits of the pre amp's topology include superb common-mode rejection, an excellent overload margin and, with its shared gain structure (20dB from the hand-wound transformer and up to 40dB from the amplifier), an extremely low noise floor and super-wide bandwidth (10Hz to 200kHz). This pre amp design is the cornerstone of Focusrite's signature 'warm-yet-transparent' sound and is a point of reference for any discerning audio professional.

In addition, the input stage provides enhanced control and creativity allowing you to switch between four carefully selected input impedance settings. The original ISA 110 setting is supplemented by three further impedance settings to either perfectly match the pre amp with any microphone and maximise level, or use different settings creatively to shape the sound of the microphone being used. Should the need arise to place extra processing in between pre amp and conversion, insert points are also featured on every channel.

Protecting the ADC, the Soft Limiter opto circuit is a new design from Focusrite, entirely preventing any 'digital overs', whilst minimising the undesirable distortion that standard limiter circuits often generate.

Finally, the new ADC embodies cutting-edge conversion technology, encompassed within pristine Focusrite circuitry, providing eight conversion channels of the highest quality, at frequency rates of up to 192kHz. Running at 96kHz allows for up to 16 (2 x 8, parallel) simultaneous digital outputs in addition to the four main analogue outputs. Digital output options include dual AES/EBU, SPDIF and dual ADAT lightpipe. Full digital metering is provided for every channel, alongside new 'moving coil' peak meters, designed to catch even the fastest of transients.

A second analogue unit can be connected utilising the four extra ADC input channels on the rear of the unit containing the optional ADC. This makes full use of the eight channels provided on a single optional ADC and expands your front-end capacity from four pre amps and eight digital outputs to eight Pre amps and eight digital outputs.

Classic preamp technology, custom Focusrite input and limiting circuits and the very best in A/D conversion technology, the ISA 428 Pre Pack raises the bar for multi-channel recording solutions into Pro Tools HD, or any other professional DAW. Equally, it can be used as an additional set of high quality pre amps for any analogue or digital console or hard disk recorder.

Features
Four classic Focusrite transformer-based preamps

8 channels of cutting-edge A/D conversion, running at up to 192kHz. Protected by proprietary optical Soft Limiter circuit (428 A/D card is optional)

Switchable Impedance for unparalleled mic matching or extended mic creativity - includes the classic ISA 110 setting

Multiple Front Panel Instrument DI. No separate DI box required

Analogue insert points on every channel

High Pass Filters on every channel

New moving coil peak meters & full digital metering (dBfs) zZounds is an authorized dealer of Focusrite products.
Inputs
Transformer-based ISA design

Gain range:
Line = +/- 18dB
Mic = 0 to 60dB (both in 6dB steps)
Inst = +10 to +40 dB variable

Input impedance:
Line = 10k ohm
Mic = Variable - 600, 2k4 and 6k8 ohm + original ISA 110 settings
Inst = >1M ohm

Analog Performance
Noise:
Line = -96dB
Mic = -128dB (EIN with 150 ohm input resistance at 60dB of gain)

THD:
Line = 0.003% with 0dBu, 1kHz input and 20Hz to 22kHz band-pass filter
Mic = 0.003%

Analog Input and Output connectors (balanced)
D.I inputs: 1/4 inch Jack (unbalanced)

Mic inputs: XLR (balanced)

Line: TRS Jack (balanced)

Insert Sends and Returns: TRS Jack (balanced)

Additional ADC inputs: XLR (balanced) Line level

Analog Outputs: XLR (balanced)

Digital Output Option
AES/EBU and S/PDIF dual 9 pin D-types

Optical - ADAT Lightpipe

Bit depths 16, 20 or 24 bit

Frequency options 44.1, 48, 88.2, 96, 176.4 and 192kHz

Clock options Standard or -256 x

Meter - 0 dBfs = +22dBu

Digital Performance

SNR - 120dB A weighted
Focusrite Warranty If you have additional warranty questions, please contact the manufacturer at 310-322-5500
Our extended 45-Day 100% Satisfaction Guarantee applies on this product. Buy it, and if it isn't just right for you, return it!
What Our Customers Are Saying About zZounds “I've been able to improve my sound, upgrade my equipment AND have backup equipment because of your Play as You Pay program. Thanks for offering such a great option for us musicians!" - customer on February 20, 2014
Customer Reviews
4.5 out of 5 (40 ratings) Rate and Review This Product
"Sweetness!"
Sound: This is a very unique pre. Transparent, yet somewhat colored. Best out of the new ISA range bunch as a mic pre. Great on acoustic instruments. Musical sounding pre. Feature: Some great features such as the impedence settings, the A/D option which also can be used for 4 xtra mic pre's of your choice to run through the A/D of the ISA (bypassing for expample the 002 converters). Quality: Its solid. Looks great. Feels great. Value: Great value. Great bang for the buck. Paid $2100 w/ the digital card option. Would've paid more if i had to. Manufacturer Support: have not used their support. The Wow Factor: Its a great 4 channel unit. Pretty damn sexy!!!! Others i'd want also are the API 3124 ($3300), or the Great River MP2NV (2 channel pre $2150)
Style of Music: All
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zZounds has verified that this customer bought this product from us. "UNBELIVABLE QUALITY AND SOUND!!!!"
Sound: SOUNDS GREAT...MANY NECESSARY FEATURES....VINTAGE SOUND...COMPARABLE TO THE CHANDLER STUFF FOR LESS THAN 1/2 THE PRICE...NO KIDDING!!! THE VARIABLE LO-CUT FILTER IS ABSOLUTELY USEFUL WHEN MICING DRUMS. Feature: THE LEAST USEFUL FEATURES ARE THE DIGITAL OUTPUTS ETC... I DESPISE DIGITAL RECORDING.... Ease of Use: IN THIS PRICE RANGE..THERE IS NOTHING AVAILABLE WITH THIS SOUND QUALITY. Quality: THIS ARRIVED TRIPLE BOXED...AND IN PERFECT COSMETIC CONDITION. IT IS VERY WELL BUILT. Value: IT IS A BETTER VALUE THAN ANYTHING I'VE RESEARCHED! Manufacturer Support: I HAVE THE RED SERIES.... NO PROBLEMS WHTSOEVER... The Wow Factor: FIRST OF ALL.....SEX HAS NOTHING TO DO WITH EQUIPMENT...ANYBODY WHO HAS THIS MENTAL DISORDER SHOULD SEEK COUNSELING IMMEDIATELY! Overall: PERFECT SOUND AND CONSTRUCTION...BETTER VALUE THAN THE API STUFF..ESPECIALLY THE 7600 CHANNEL STRIPS.
Style of Music: ROCK
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Available on
orders $249+
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Need it now but short of cash? All we need is the first payment up front and the rest in easy monthly payments!

Fast approval.
We approve everyone, with very few exceptions, as long as we can verify your identity.
No interest. Ever.
It's just as if you paid the whole amount up front!
No paperwork. Nothing to track.
No application to mail or fax, no bills to pay. We automatically charge the payments to your credit card.

We'll wait on your money so you don't have to wait for your gear!

When you checkout, just click the Play as you Pay checkbox to indicate which installment plan you wish to use.

close [x]
on most orders $49+

Just $2.99 on
smaller orders

Really heavy stuff might cost you a
little more

learn more

Why fight traffic and pushy salesmen when we'll bring your gear straight to your home, free of charge?

zZounds free shipping is really free!
No hidden charges or hassles on returns.
Fast, reliable delivery
We have warehouses on both coasts, so most shipments arrive in 3 days or less.
We don't collect sales tax. Bonus!
Only NJ residents pay tax during checkout.
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