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Focusrite ISA-828 A-D Card
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The ISA eight channel 192kHz A-D converter outperforms every other converter yet devised, and was the first audio A-D converter to utilise Burr-Brown...Click To Read More About This Product
6-Month* financing available.
Cutting-edge 8-channel conversion for the Focusrite ISA 428 and ISA 828.
The ISA eight channel 192kHz A-D converter outperforms every other converter yet devised, and was the first audio A-D converter to utilise Burr-Brown Pro Audio Amplifiers and flagship PCM4220 A-D converter chips. With cutting-edge conversion technology seated within Focusrite custom analogue circuitry, the card delivers unparalleled performance; specifications include a dynamic range of 122dB and jitter less than 250 picoseconds. More information about Focusrite's ISA A-D converters can be found on the right.
The card can be retrofitted to an ISA428, ISA428 MkII or ISA828 at any time and, thanks to its convenient 25-pin D-Type connector, integrates seamlessly with Pro Tools HD as well as other popular hard disk recorders and mixing desks.
All eight converters are always available with this option, even when using the ISA428 and ISA428 MkII. When installed in one of these four-channel mic preamps, the the extra 4 converters of the A-D card are fed by four XLR inputs on the back labeled "ADC Input".
Digital formats include an eight-channel single/dual wire AES/EBU and S/PDIF output, as well as an eight-channel ADAT lightpipe (SMUX/SMUX2) output. Word clock i/o is provided via dedicated BNC connectors.
ISA A-D Converters
Just paying for the PCB and circuitry, without any additional casing and metalwork, affords a considerable reduction in cost whilst maintaining an extremely high level of sonic clarity. However, the benefits from installing Focusrite's optional ADC extend far beyond the obvious financial advantages and space saving issues. As most converters use the same chips, it is the quality of the surrounding analogue circuitry that makes the difference. This is the reason why the ISA ADC is unrivalled in terms of both price and performance.
Focusrite's R and D team have carefully considered the organisation of the PCB layout and grounding, ensuring that the S/N ratio and linearity of the converter are optimised. The noise floor and THD (Total Harmonic Distortion) are kept to a minimum by the nature of the power supply and the analogue input design, with analogue filtering positively effecting the sound of the digital noise.
In addition, the supporting circuitry around the ADC (dealing with data transmission, bit reduction and incoming word clock) has been carefully structured, as it influences the converter through heat, power supply and data jitter. One of the most important aspects of the ADC is the clock design, as this determines the linearity of the digital output. All Focusrite ADCs are designed to have incredibly low jitter figures (44.1kHz-192kHz < 20 psec) which significantly improve the quality of the sound.
With the converters housed within the analogue units, the signal path is kept as short as possible, having no unnecessary analogue connections to the inputs of recording equipment. In addition, Focusrite units do not contain extraneous clocks or other sources of digital noise, unlike so many digital desks and multi-I/O DSP configurations.
- Focusrite offers a 2-year manufacturer's warranty
Add an ISA-828 A-D card and have legendary Focusrite sound for your DAW's front end. Ordr today!
- AES/EBU (5V / 110 ohms), S/PDIF (0.8V / 75 ohms)
- ADAT lightpipe (SMUX I/II/IV, channels 1-4 only in 176.4kHz, 192kHz mode)
- S/PDIF lightpipe (channels 1-4 only; mutually exclusive with ADAT lightpipe)
- 24 bits, internally configurable to 16 or 20 bits if necessary.
- AES3 output jitter
- <:1500ps, 50Hz-100kHz
- <:350ps, 700Hz-100kHz
- All ranges: 20Hz-20kHz ± 0.3dB (100Hz-20kHz ± 0.1dB)
- 176.4kHz, 192kHz : 17Hz-90kHz ± 0.5dB
- -121.5dB A-weighted, audio band-limited, 1kHz, -60dB FS input
- Maximum 0.0033% at -1dB FS (1kHz)
- Minimum 0.0008% at -15dB FS (1kHz)
- 117.5dB at 44.1kHz, CCIR-weighted, full bandwidth
- -100dB at 12kHz
- -95dB at 20kHz
Musician's Friend Gold Coverage
Gold Coverage goes above and beyond the manufacturer's warranty to protect your gear from unexpected breakdowns, accidental damage from handling and failures. This plan covers your product for one, two, three or up to five years from your date of purchase, costs just pennies per day and gives you a complete "no-worry" solution for protecting your investment.
Gold Coverage Includes:
- Unexpected and unintentional spills, drops and cracks
- Normal wear and tear
- Power surges
- Dust, internal heat and humidity
Other plan features include:
- For products over $200, No Lemon Policy applies. If it fails for the same defect 3 times, it is replaced on the 4th breakdown. (Does not apply to failures due to drops, spills, and cracks)
- For products under $200 experiencing the above failures, a Musician's Friend gift card will be issued for the full price of the product + tax.
- Shipping fees covered if required for repair or replacement
- Plans are transferable in the event merchandise is sold
- Plans are renewable on new gear
*Limitations and exclusions apply. See terms and conditions (Opens in new window) for program details
Term for New Gear begins on date of purchase but does not replace the store return policy or manufacturer coverage.