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Description from Woodbrass :
You may only need a couple of mic preamps, but they need to be the very best. The ISA Two dual-mono mic pre is the ideal solution: two independent channels of the highest quality classic Focusrite mic pres, with line in and front-panel instrument inputs no DI box required. Based on the legendary designs found in the Focusrite Forte and Studio Consoles, ISA Two is the ideal front-end for your rack.Superb sound spanning four different decadesFocusrites microphone preamplifiers go back to the original Focusrite ISA 110 modules, when Rupert Neve was commissioned by George Martin in 1985 to create a no-compromise channel strip for his Neve console. Combining the very best solid-state electronics with transformer coupling, Focusrite mic pres have played a key part in the recording of hundreds of hit records and theyre the choice of leading artists, producers and engineers around the world.Lundahl TransformersAt the heart of the ISA Two is a pair of Lundahl LL1538 transformers. ISA products have relied on Lundahl from the beginning, since their components were originally specified in 1985. The LL1538 features a 3-section winding, resulting in very low leakage inductance and, as a result, an extended frequency response. Theyre encapsulated in mu-metal cans to shield them from stray magnetism.Variable input impedance and up to 80 dB of gainISA Two features two classic Focusrite mic preamps, with four impedance settings including the original ISA 110 setting. Variable input impedance allows you to go for an accurate, transparent sound or choose to highlight the character of your favourite vintage mic and anywhere in between. With up to 80 dB of low-noise gain, ISA Two can perform in the most demanding situations - really bringing your ribbon, condenser or moving coil mics to life.Insert your choice of processorsEach channel has a fully-balanced insert point accessed via TRS sockets on the rear panel and activated with a front-panel button, so its easy to use outboard processors with the ISA Two. Just plug in your choice of EQ, compressor or limiter.Two channel classic Focusrite ISA transformer-based preampFront panel, per channel:1/4 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 channel:XLR-F mic inputs1/4 TRS line inputs1/4 TRS Sends1/4 TRS ReturnsXLR-M line outputSingle peak meter calibration dialSingle IEC power socketNoise at main output with gain at unity (0 dB) measured with 50 source impedance and a 22Hz - 22 kHz band pass filterW x D x H 480 mm x 280 mm x 44 mmWeight 3.7 kg
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