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Focusrite ISA Two Classic Dual Channel Preamplifier

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2-channel Mic/Instrument Preamp with 80dB of Gain, Switchable Phantom Power, Variable Hi-pass Filters, and Variable Input Impedance

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About Focusrite ISA Two Classic Dual Channel Preamplifier


  • Lundahl LL1538 mic input transformer: ISA modules use the very best input transformers available
  • Variable input impedance: four choices of input impedance, including the original ISA 100 value, allow you to match the preamp to your microphone
  • Front panel instrument and rear panel line inputs: two 1/4-inch jack sockets on the front panel give you instant access to a transparent DI input and TRS line inputs are available on the rear panel too
  • Variable cut-off high-pass filter: 18dB/octave high-pass filter, ideal for cutting out unwanted low-frequency sounds - with a range of 16 to 420 Hz
  • Rear panel balanced inserts: connect external signal processors using ISA Two's balanced insert point with 1/4-inch TRS send and receive connections.


Preamp Type Solid State
Number of Channels 2
Frequency Response 10Hz-135kHz
Phantom Power Yes
Analog Inputs 2 x XLR, 2 x TS (inst), 2 x TRS (line), 2 x TRS (Return)
Analog Outputs 2 x XLR, 2 x TRS (Send)
Rack Spaces 1U
Height 1.75"
Depth 11"
Width 19"
Weight 8.16 lbs.
Manufacturer Part Number ISA Two