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2 Year
$179.99
3 Year
$249.99
5 Year
$489.99
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Review Summary
Accidents happen. Protect your favorite Adorama products and purchase a protection plan to stay covered from accidental damage, mechanical or electrical failures, and more.
If we can’t fix it, we’ll replace it at no additional cost.
Protect your product from drops, spills, and more.
Enjoy your gear without fear. We have you covered!
When regular use of your product over time results in mechanical or electrical failure.
We will never charge you a deductible after the purchase of a plan.
Our claims process is simple & easy and our customer service team is happy to help.
Adorama Protect powered by Extend is available for purchase to customers in the United States. Not available for international or U.S. territories purchases. Plans on open box items do not cover pre-existing damage.
Adorama Protect plans are available for ABS clients. If you have any questions or require assistanse, please call 800-223-2500
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-0.35dB at 20Hz and -3dB at 122kHz at min gain (0dB)
-2.5dB at 20Hz and -3dB 103kHz at max gain (60dB)
0dB to +60dB in 10dB steps, plus 0dB to +20dB continuously variable trim
+7.4dBu
0.0009% (measured at 1kHz -20dBu input signal, at 30dB gain setting, with a 20Hz/22kHz bandpass filter)
-126dB (measured at 60dB of gain with 150 Ohms termination and 20Hz/22kHz bandpass filter)
-98dBu (measured with a 20Hz/22kHz bandpass filter) with unity gain
123dB (relative to max output 25dBu)
120dB (relative to 0dBFS (+22dBu)
88dB
600 Ohms , 1400 Ohms , 2400 Ohms , 6800 Ohms
-0.3dB at 20Hz and -3dB at 94kHz at unity gain (0dB)
-20dB to +10dB in 10dB steps, plus 0dB to +20dB continuously variable trim
+25.4dBu
0.002% (measured with +4dBu input signal, 0dB gain setting, with a 20Hz/22kHz bandpass filter)
-91dBu (measured with a 20Hz/22kHz bandpass filter) with unity gain
116dB (relative to max output 25dBu)
113dB (relative to 0dBFS +22dBu). Input Impedance: 10kOhms
at +10dB gain: -0.2dB at 20Hz and 0dB at 200kHz
at +40dB gain: -3dB at 20Hz and -3dB at 38.4kHz
+10dB to +40dB continuously variable
+11.5dBu
0.006% (measured with -20dBu input signal, at minimum gain (+10dB), with a 20Hz/22kHz bandpass filter)
-95dBu (measured with a 20Hz/22kHz bandpass filter) with minimum gain (+10dB)
= >1MOhms
Roll off = 18dB per octave 3 pole filter
Frequency range: 16Hz to 420Hz (continuously variable, measured at the 3dB down point)
4x instrument 1/4" TS jack inputs on front panel
4x microphone XLR inputs on rear panel
4x line 1/4" TRS jacks on rear panel
4x insert return 1/4" TRS jacks on rear panel
4x ADC XLR inputs on rear panel
4x line XLR outputs on rear panel
4x insert send 1/4" TRS jacks on rear panel
IEC power input connector 100Vac - 240Vac
8x output meters, 6 segment
4x 30-60 mic gain range selection indicator
4x +48V phantom power indicator
4x Phase indicator
4x Insert In indicator
4x Filter In indicator
4x Input selection indicators (Mic, Line, Inst)
4x Z In microphone input impedance selection indicators (Low, ISA110, Med, High) Clock select indicators (44.1, 48, 88.2, 96, 176.4, 192)
Ext clock indicators (Lock, Word clock, 256X)
19 x 3.5 x 11" / 482.6 x 88.9 x 279.4mm
5.5kg / 12.12lbs
815301005124
From the esteemed house of Focusrite, the ISA428 MkII 4-channel Microphone Preamplifier is a high-quality, professional-grade audio equipment designed for the discerning recording professional. This advanced preamplifier is a testament to Focusrite's commitment to superior audio quality and engineering excellence, a reputation built over 25 years.
The ISA428 MkII is a versatile and durable preamplifier, featuring the same classic circuitry and renowned audio quality that made the original a favorite among audio professionals. It offers four of the prestigious ISA series transformer-based preamps, known for their outstanding transparency and subtle warmth contributed by transformer core saturation. These preamps have been the producers' choice on countless hit records over the last two decades.
This advanced microphone preamplifier comes with selectable input impedance, allowing users to perfectly match the preamp with any microphone or creatively shape the sound of the microphone using different settings. One of these settings includes the 'Vintage ISA110', providing the original Focusrite signature sound.
The ISA428 MkII also features direct instrument inputs and an optional eight channels of high-quality analogue to digital conversion. With four additional inputs, you can route other line signals through the converter. The four front panel instrument inputs allow for quick and easy connection, eliminating the need for a separate DI box.
This preamplifier also boasts dedicated analogue insert points on every channel, allowing for extra processing between preamp and conversion. The variable high-pass Focusrite filter provided on every channel is the same as featured on the original ISA428.
Finally, the ISA428 MkII is equipped with accurate six-segment LED metering on every channel, designed to catch even the fastest transients. Whether you're looking to preserve the sound of your classic microphones or searching for the perfect front end for your digital studio, the ISA428 MkII is a versatile and reliable choice.