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I’m selling my Focusrite ISA Two channel Microphone pre amplifier. It is about 4 years old and in good working order. I have the original box that will be shipped with the unit. Cosmetically in good condition but with a few scrapes and scratches from rackmounting.
PLEASE READ BEFORE BUYING
The input XLR’s have a tendency to jam making the cables hard to remove. This is a known fault on this era of Focusrite products. This one has two short XLR cables installed so there’s no need to remove them. If you want to you have to disassemble the XLR plug and twist counter clockwise with a pair of grips and the XLR’s can be removed. This fault is reflected in the asking price.
Pick up is welcome from Forest Gate East London.
I am away until the 22nd July and will not be able to ship until after that date.
The Focusrite ISA Two brings together a totally independent pair of legendary ISA microphone preamps inspired by the original ISA 110 module, combining the best of traditional solid-state electronics with the original input transformer specified by Rupert Neve the Lundahl LL1538. Two is a nice round number ideal for recording, say, a vocal and an instrument, or a stereo piano. But though you may only need two mic pres, you owe it to your craft to choose the best. (And if you need more, we offer ISA 428 Mk II 4-channel and ISA 828 8-channel units too.) Focusrite has made one little adjustment to the mic pre. The original ISA 110 had a single input impedance that was ideal for the mics of the time. In the ISA Two there are three more, allowing you to get the very best out of any microphone, vintage or modern. Give a vintage mic the input it expects to get a traditional, warm sound. Pair the ISA Two with modern microphones and get the most transparent sound imaginable. Or experiment and pull out the inner character of any microphone you care to try. Couple that with up to 80dB of gain and you can be ready for anything. In addition to the mic pres, there are front panel instrument inputs for instant access, along with rear-panel line ins. There’s also a balanced insert point on the rear panel, actuated with a front-panel button so you can insert the EQ, dynamics or other processors you need. Add to that the user-calibrated 8-LED metering and variable cutoff high-pass filter and you know that with the ISA Two you’ll have everything you need to get the highest quality sound into your recordings.
Focusrite ISA Two FeaturesLundahl LL1538 mic input transformerUp to 80 dB of clean, distortion-free gainFour choices of input impedanceUser-calibrated meteringFront-panel instrument and rear panel line inputsVariable cut-off high-pass filterRear panel balanced insertsFocusrite offers a 2-year manufacturer’s warrantySpecificationsFront panel, per channel” Instrument inputVariable input impedance – Low, ISA 110, Medium, HighInput selection – Mic, Line, Instrument0 – 30 dB/30 – 60 dB gain switchPhantom power switchPhase invert switch0 – 60 dB gain in 10 dB steps0 – +20 dB continuously variable trimVariable high-pass filter with on/off switchInsert point on/off switchEight-LED user-calibrated level metersSingle power switchRear panel, per channelXLR-F mic inputs” TRS line inputs” TRS Sends” TRS ReturnsXLR-M line outputSingle peak meter calibration dialSingle IEC power socketMaximum Input and Output LevelsMaximum Output Level: +24 dBu with a THD+N < 0.01% at 1kHz measured with 150 source impedance and 22Hz/22kHz band-pass filterMaximum Microphone Transformer Input Level: +7 dBu with a THD+N < 0.7% at 1kHz measured at 0 dB of gain with 150 source impedance and 22Hz/22kHz band-pass filterMic Input ResponseGain range: 0 dB to +60 dB in 10 dB steps, plus 0 dB to +20 dB continuously variable trimInput Impedance: Switched Impedance setting / Equivalent Input Impedance at 1kHzLow = 600 ISA 110 = 1.4 kMed = 2.4 kHigh = 6.8 kEIN (Equivalent Input Noise): Measured at 60 dB of gain with 150 source impedance and 22 Hz-22kHz band pass filter = -127 dBNoise: Noise at output with unity gain (0 dB) and 22 Hz-22kHz band pass filter = -97 dBuSignal-to-Noise Ratio: Measured with 150 source impedance and 22 Hz-22kHz band pass filter = 121 dB relative to max output +24 dBuTotal Harmonic Distortion + Noise: Measured with a -20 dBu input signal at +30 dB of gain and with a 22 Hz-22 kHz band pass filter = < 0.0007% at 1kHzFrequency Response:At minimum gain (0 dB)-0.5 dB at 10 Hz, -1 dB at 135kHz, relative to 1kHzAt +60 dB gain-6 dB at 10 Hz, -1 dB at 115kHz, relative to 1kHzCMRR (Common Mode Rejection Ratio):-94 dB for mic input at 60 Hz for max. output = +24 dBu-91 dB for mic input at 10 kHz for max. output = +24 dBuCrosstalk Channel to Channel: Mic input, with I/P = 0 dBu, gain = 0 dB @ 1kHz input to channel A, channel B output = -85 dBLine Input ResponseGain Range: -20 dB to +10 dB in 10 dB steps, plus 0 dB to +20 dB continuously variable trimInput Impedance: 10 k from 10Hz to 200kHzNoise: Noise at main output with gain at unity (0 dB) measured with 50 source impedance and a 22Hz - 22 kHz band pass filter = -97 dBuSignal-to-Noise Ratio: Measured with 50 source impedance and a 22Hz-22kHz band pass filter = 121 dB relative to max output +24 dBuTotal Harmonic Distortion + Noise: Measured with a 0 dBu input signal, +10 dB of gain and a 22Hz-22kHz band pass filter = < 0.002% at 1kHzFrequency Response:At unity gain (0 dB) -0.3 dB at 10Hz, -1 dB at 80kHz, relative to 1kHzCrosstalk Channel to Channel: Line input, with I/P = 0 dBu, gain = 0dB @ 1kHz input to channel AChannel B output = -91 dBInstrument Input ResponseGain Range: +10 dB to +40 dB continuously variable trimInput Impedance: > 2 MNoise: >Measured with 22Hz-22kHz band pass filter = Minimum gain (+10 dB) = -95 dBuFrequency Response:At minimum gain (+10 dB)-0.1 dB at 10 Hz,-1 dB at 115 kHz, relative to 1 kHzAt maximum gain (+40 dB)-2.5 dB at 10 Hz,-1 dB at 110 kHz, relative to 1 kHzHigh-Pass FilterRoll-Off: 18 dB per octave (3 pole filter)Frequency Range: Continuously variable from 16 Hz to 420 Hz (-3 dB)Weight and DimensionsDimensions (WxHxD): 18.90″ x 1.73″ x 11.02″ (480 mm x 44 mm x 280 mm)Weight: 8.16lb
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Category: Musical Instruments:Pro Audio Equipment:Preamps
Location: forest gate