Focusrite ISA428 MkII - Microphone Preamp
Model: ISA428 MKII
FOCUSRITE Warranty


- You name the price you want to pay for a product.
- If the retailer likes your offer, you get that price for the product.
- Guaranteed Brand New Products
- All Products Sold by Manufacturer Authorized Retailers
- 30 Day Return Policy
-
Free Shipping
No Additional Fees
Product Back-Ordered
We are sorry. At this time, we are not accepting offers on this product. Please click the button below to be notified when our retailers get it back in stock.
Thank you! We will be in touch.
Something went wrong. Please try again later.
Specifications
Packaging Info
Package Weight | 17.55 lb |
Box Dimensions (LxWxH) | 25.0 x 18.0 x 9.0" |
General Information
Output | 4 x XLR Line (rear panel)4 x 1/4" TRS phone Insert Send (rear panel) |
Phantom Power | +48V individually switchable |
Multi Function | Has provision for optional analog to digital converter |
Gain Range | Microphone: 0dB to +60dB in 10dB steps, plus 0dB to +20dB continuously variable trimLine: -20dB to +10dB in 10dB steps, plus 0dB to +20dB continuously variable trimInstrument: +10dB to +40dB continuously variable |
Input Impedance | Microphone: 600Ω, 1.4kΩ, 2.4kΩ, 6.8kΩLine: 10kΩInstrument: >1MΩ |
Maximum Output Level | Microphone: +7.4dBuLine: +25.4dBuInstrument: +11.5dBu |
Frequency Response | Microphone: -0.35dB at 20Hz and -3.0dB at 122kHz (0dB gain) and -2.5dB at 20Hz and -3.0dB at 103kHz (60dB gain)Line: -0.3dB at 20Hz and -3dB at 94kHz (0dB gain)Instrument: -0.2dB at 20Hz and 0dB at 200kHz (+10dB gain) and -3.0dB at 20Hz and -3.0dB at 38.4kHz (+40dB gain) |
Number of Channels | 4 |
Noise | Microphone: Noise EIN: -126dB (measured at 60dB of gain with 150Ω termination and 20Hz/22kHz bandpass filter) Noise at main output with unity gain: -98dBu (measured with a 20Hz/22kHz bandpass filter) SNR: 123dB (relative to max output 25dBu) SNR: 120dB (relative to 0dBFS (+22dBu) Line: Noise at main output with unity gain: -91dBu (measured with a 20Hz/22kHz bandpass filter) SNR: 116dB (relative to max output 25dBu) SNR: 113dB (relative to 0dBFS +22dBu) Instrument: Noise at main output with minimum gain (+10dB): -95dBu (measured with a 20Hz/22kHz bandpass filter) |
CMRR | Microphone: 88dB |
Meters | Each 6-LED meter is calibrated 0dBFS = +22dBu (the maximum level which can be correctly converted by the optional internal A/D converter before overload occurs). The meter calibration points are as follows: Meter panel calibration value in dBFS / Equivalent dBu value: 0dBFS / +22dBu -2dBFS / +20dBu -6dBFS / +16dBu -12dBFS / +10dBu -18dBFS / +4dBu -42dBFS / -20dBu |
Power Requirements | 100VAC~240VAC |
Dimensions (WxDxH) | 19 x 11 x 3.5" (483 x 279 x 89mm) |
Weight | 12.2 lbs (5.5kg) |
Specialties | High Pass FilterRoll off = 18dB per octave 3 pole filterFrequency range: 16Hz to 420Hz (continuously variable, measured at the 3.0dB down point) |
THD + N | Microphone: 0.0009% (measured at 1kHz, -20dBu input signal, at 30dB gain setting, with a 20Hz/22kHz bandpass filter)Line: 0.002% (measured with +4dBu input signal, 0dB gain setting, with a 20Hz/22kHz bandpass filter)Instrument: 0.006% (measured with -20dBu input signal, at minimum gain (+10dB), with a 20Hz/22kHz bandpass filter) |
Inputs | 4 x XLR Microphone (rear panel)4 x 1/4" TS phone Instrument (front panel)4 x 1/4" TRS phone Line (rear panel)4 x 1/4" TRS phone Insert Return (front Panel)4 x XLR ADC Input for optional AD converter card (rear panel) |
- 4 Channels
- Transformer Based
- Selectable Impedance
- Phantom Power
- Instrument Inputs
- Variable High-Pass Filter
- Per Channel LED Metering
- Focusrite ISA428 MkII - Microphone Preamp
- AC Power Cable
- One (1) Year Warranty