Microphone Pre-Amplifiers
Focusrite ISA 428 MkII
Microphone Pre-Amplifier / HN256561
-15%
![Focusrite ISA 428 MkII]()
![Focusrite ISA 428 MkII]()
![Focusrite ISA 428 MkII]()
The Focusrite ISA 428 MKII is a versatile and flexible four-channel microphone preamplifier in a 2U rack-mount design equipped with Lundahl input transformers and independent line and instrument inputs. The preamp topology is based on the circuitry of the original ISA110 designed by Rupert Neve, a circuitry that has been used for decades in Focusrite's most successful products.
The Lundahl LL1538 input transformer used in the original RED modules lends a special character to the sound that cannot be replicated in any other way. Another distinctive feature that will affect the sound of the connected microphone is the ability to select one of four carefully preset impedances (Low / ISA 110 / Med / High). This choice really does significantly affect the input sound, and you can experiment and bring out the character of the microphone or, conversely, opt for a completely transparent presentation, it's up to you. Within each channel, the preamplifier offers independent adjustment of all the important functions, starting with the impedance selection and precise gain adjustment via two potentiometers and a range knob, this combination makes the input gain as high as 80 dB. You'll also find switches for phantom power, phase rotation, insertion channels into the signal path (8 x Jack 6.3 mm SEND/RETURN) and last but not least, an HP filter with a continuously adjustable range of 16 - 420 Hz and a steepness of 18 dB/octave.
In addition to the main microphone (4 x XLR) and line (4 x Jack 6.3 mm TRS) inputs on the rear panel, instrument inputs (Jack 6.3 mm) are available on the front panel, so you can use the preamp's potential to enrich the sound of your instruments. The last A-D input jacks (4 x XLR) are for connecting line signals and can be used when you purchase an optional 8-channel A/D card (ISA ADN8).
The Lundahl LL1538 input transformer used in the original RED modules lends a special character to the sound that cannot be replicated in any other way. Another distinctive feature that will affect the sound of the connected microphone is the ability to select one of four carefully preset impedances (Low / ISA 110 / Med / High). This choice really does significantly affect the input sound, and you can experiment and bring out the character of the microphone or, conversely, opt for a completely transparent presentation, it's up to you. Within each channel, the preamplifier offers independent adjustment of all the important functions, starting with the impedance selection and precise gain adjustment via two potentiometers and a range knob, this combination makes the input gain as high as 80 dB. You'll also find switches for phantom power, phase rotation, insertion channels into the signal path (8 x Jack 6.3 mm SEND/RETURN) and last but not least, an HP filter with a continuously adjustable range of 16 - 420 Hz and a steepness of 18 dB/octave.
In addition to the main microphone (4 x XLR) and line (4 x Jack 6.3 mm TRS) inputs on the rear panel, instrument inputs (Jack 6.3 mm) are available on the front panel, so you can use the preamp's potential to enrich the sound of your instruments. The last A-D input jacks (4 x XLR) are for connecting line signals and can be used when you purchase an optional 8-channel A/D card (ISA ADN8).
In Stock
€2,159.00
Discount valid until 12/01/2025
Will ship tomorrow
All delivery options
€1,835.00
Price including VAT
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- We offer the best price on the market
- Free shipping on purchases over €299.00
- Extended 3-year warranty
- Goods can be returned within 30 days*
- We pay for shipping when you return goods
- You get a bonus with every purchase
- You can try it out in the rehearsal rooms at the store in Prague
Functions
- Phantom power Yes
- 19” Rack Compatible Yes
Features
- Number of Channels 4
- Insert Inputs 8
- Impedance Low / ISA 110 / Med / High Ohm
Inputs and outputs
- Input Ports 4 x XLR (mic), 4 x Jack 6,3 mm TRS (line), 4 x XLR ADC, 4 x HiZ instrument, 4 x Jack 6,3 mm TRS (line) insert RETURN
- Output Ports 4 x XLR, 4 x Jack 6,3 mm TRS (line) insert SEND
Country of production
- Country of Production China
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