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Focusrite ISA828 8-Channel Mic Pre-amp

Item #: 
1275776904317
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You can enjoy the benefits of Focusrites classic heritage sound in many ways, but one of the most cost-effective is with the ISA 828, which includes eight Focusrite transformer-based mic preamps in a ... Click To Read More About This Product

IN STOCK & READY TO SHIP

Gear returned in mint condition. If you're looking for a virtually new instrument in possibly less-than-perfect packaging, this is a great value.
  • Includes 45-Day, No-Hassle Returns
  • Includes full manufacturer's warranty
Gear returned in great condition, with only minor signs of use, such as slight scuffs or pick marks. It looks and plays like new and may be considered an equivalent to display units found in retail stores.
  • Includes 45-Day, No-Hassle Returns
  • Includes full manufacturer's warranty
Sale Price:
$2,39999
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  • Regular Price
    $2,49999
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Ship to Store Available in: 3-7 Days (estimated) Fairfax, VA (15.38  mi) View More Stores For Availability Store Information


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Overview

You can enjoy the benefits of Focusrites classic heritage sound in many ways, but one of the most cost-effective is with the ISA 828, which includes eight Focusrite transformer-based mic preamps in a compact 2U package, along with front panel instrument ins and rear panel line inputs.

The Focusrite ISA mic preamp is based on the original design created by Rupert Neve in 1985 for Sir George Martins AIR Studios. Virtually unchanged over the years, the ISA mic preamp delivers the warm, full sound that could be just what youre looking for “ and if you use a significant number of microphones at once, the ISA828 is for you.

We made one significant alteration to the design, and that was to add three additional input impedances to the original vintage ISA110 setting. Ranging from low to high impedance, the four settings enable you to get the very best sound from a vintage mic “ its after all what the ISA was originally designed for “ but also get a clean, transparent sound from the microphones of today. Or you can enhance a particular feature of your favourite microphones. Indeed, ISA makes the perfect match for any mic. Theres also a vintage design 75Hz / 18dB per octave high pass filter on each channel for detailed control of the bass end.

Four front-panel direct instrument inputs are also provided, with high and low impedance settings for extra versatility, and the input side is rounded out by eight TRS rear-panel line inputs. With convenient 25-pin D-type output connectors, ISA 828 is easy to interface with Pro Tools HD and other popular recording systems and consoles. Theres also an optional 8-channel A/D converter available with 122dB dynamic range and sampling up to 192kHz. An insert is available on each channel between the preamp and the A/D. 6-LED meters let you know exactly what is going on, and use the same reference points as Avid Pro Tools HD.

FEATURES

  • Eight ISA series transformer-based preamps
  • Optional eight-channel 192kHz A-D converter
  • Interface easily with Pro Tools and other systems
  • Direct instrument inputs
  • Inserts available on every channel
  • Switchable impedance
  • High pass filter, polarity reverse and phantom power
  • Six LED input meter
  • Eight Lundahl LL1538 mic input transformers
SPECIFICATIONS
Mic Input Response
  • Gain range = 0dB to 60dB in 10dB steps
  • Input Impedance, variable as follows:-
Switched Impedance setting Equivalent Input Impedance at 1kHz
  • Low 600
  • ISA 110 1400
  • Med (Medium) 2400
  • High 6800
  • EIN (equivalent input noise) = -126dB measured at 60dB of gain with 150 Ohm terminating impedance and
  • 22Hz/22kHz bandpass filter
  • Noise at main output with gain at unity (0dB) = -97dBu measured with a 22Hz/22kHz bandpass filter
  • Signal-to-noise ratio relative to max headroom (9dBu) = 106dB
  • THD at medium gain (30dB) = 0.0008% measured with a 1kHz -20dBu input signal and with a 22Hz/22kHz bandpass filter
  • Frequency response at minimum gain (0dB) = -0.5dB down at 10Hz and ”3dB down at 110kHz
  • Frequency response at maximum gain (60dB) = ”3dB down at 16Hz and ”3dB down 85kHz
  • CMRR=91.8dB (Channel 1, 1kHz, maxiumum gain)
  • Crosstalk Channel to Channel: with 10dB@1kHz input to chA, chB output =102dBrA. With 10dB@10kHz input to chA,
  • chB output = 84dBrA
Line Input Response
  • Gain range = -20dB to +10dB in 10dB steps
  • Input Impedance = 10k
  • Ohms from 10Hz to 200kHz
  • Noise at main output with gain at unity (0dB) = -96dBu measured with a 22Hz/22kHz bandpass filter
  • Signal-to-noise ratio relative to max headroom (24dBu)=120dB
  • Signal-to-noise ratio relative to 0dBFS(+22dBu) = 118dB
  • THD at unity gain (0dB) = 0.001% measured with a 0dBu input signal and with a 22Hz/22kHz bandpass filter
  • Frequency Response at unity gain (0dB) = 0.3dB down at 10Hz and ”3dB down at 122kHz
Instrument Input Response
  • Gain range = 10dB to 40dB continuously variable
  • Input Impedance:
  • High >1M Ohms
  • Low > 300k Ohms
  • Noise at minimum gain (+10dB) = -90dBu measured with a 22Hz/22kHz bandpass filter
  • Noise at maximum gain (+40dB) = -62dBu measured with a 22Hz/22kHz bandpass filter
  • THD at minimum gain (+10dB) = 0.002% measured with a 10dBu input signal and with a 22Hz/22kHz bandpass filter
  • Frequency Response at 10dB gain with -10dB input = 10Hz-200kHz ± 0.6dB
  • Frequency Response at 40dB gain with -40dB input = -2.5dB down at 10Hz and 0dB at 200kHz
High Pass Filter
  • Roll off = 18dB per octave 3 pole filter
  • Fixed Frequency 75Hz measured at the 3dB down point
Input Meter
  • Calibrated in the detent position for 0dBFS = +22dBu and indicates the level after the High Pass Filter and before the
  • Insert Send output. LED levels are as follows:
  • 0 = +22dBu
  • -2 = +20dBu
  • -6 = +16dBu
  • -12 = +10dBu
  • -18 = +4dBu
  • -42 = -20dBu
  • Calibration is adjustable to allow 0dBFS to equal +10dBu to +26dBu
Pro Coverage
MANUFACTURER'S WARRANTY
All Focusrite products are built to the highest standards and should provide reliable performance for many years, subject to reasonable care, use, transportation and storage.

In the event of a Manufacturing Defect becoming evident within 12 months from date of purchase Focusrite undertakes that the product will be repaired or replaced free of charge if the product is returned to the authorised dealer from whom it was purchased. In these circumstances, or if you need an out-of-warranty repair to your Focusrite product, please contact your local Focusrite distributor in your country of residence or business : Find your local distributor here and you will be advised of the correct return procedure.

Alternatively contact the Focusrite Reseller from which you purchased the product. If you purchase a Focusrite product outside your country of residence or business you will not be entitled to ask your local Focusrite Distributor to honour this Limited Warranty, although you may request a chargeable repair.

Alternatively, the unit may be returned at your cost to the dealer you purchased the unit from so that they can organise a Warranty repair with their Focusrite Distributor.

This Warranty does not include cost of shipping to and from the authorised dealer from whom it was purchased. In every case it will be necessary to provide the original invoice or store receipt to accompany the defective product to the supplying dealer. This Limited Warranty is offered solely to the first purchaser of the product from an Authorised Focusrite Reseller (defined as a reseller which has purchased the Product directly from Focusrite Audio Engineering Ltd. in the UK or its Authorised Distributors outside the U.K,) and is not transferable.

This Warranty is in addition to your Statutory Rights in the country of purchase.

Please note: A Manufacturing Defect is defined as a defect in the performance of the product which may be expected from a reasonable interpretation of the published description and performance specifications as published by Focusrite Audio Engineering Ltd. This does not include damage caused by post-purchase transportation, storage or careless handling, nor damage caused by misuse.

A significant proportion of products returned under Warranty (which are very few in number compared to numbers sold) are found not to exhibit any fault at all. Please check that the mains voltage is correctly set for your local supply and that your connecting cables are in good order and correctly connected.

If in doubt about the product functions please read the user guide and if necessary contact your dealer for advice before returning the product to the supplying dealer. You can also contact the Focusrite Tech Support team at the Focusrite Answerbase for general advice.


GUITAR CENTER'S PRO COVERAGE
Pro Coverage gives you added warranty protection for your gear. Stepping in where the manufacturer's "normal wear and tear" coverage ends, our Pro Coverage program offers you upgraded coverage if your product ever fails Click To Read More About This Product.

Pro Coverage includes
  • Accidental damage protection
  • Expedited repair or replacement
  • Free shipping (for returns or repairs)
  • 100% coverage for commercial use
  • Extended price protection
  • No lemon guarantee
  • Free transfer of coverage to a new owner
  • Repair costs covered for up to five years from date of purchase
  • Repair authorization-toll-free by phone or via the web
  • Customer Reviews
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