Iron - Transformer Mic Preamp

Interphase Audio Verified independent store

→

Iron is the module version of the much loved Microphone Preamplifier of the Ark console, but with a custom high-quality input transformer added. For pure sonic clarity, Iron’s univ ersal amp can accept signals from any type of microphone whatsoever. The Mic trim pot gain range has been limited from +20 to +60 dB to allow fine level control. To allow for lower input level boost, we added a 20dB [Range] switch, so the range can be changed to be 0 to +40 dB, keeping the same fine control of the input signal. Note that the [Range] switch is not a “Pad”, but changes the gain range of the microphone amplifier by modifying the following parameters:- the value of the gain pot- the quiescent current of the input stage- the amount of feedback used to stabilise the circuit accordinglyAll of these are necessary to preserve the exemplary noise, distortion and headroom performance at all gains.In short: While a “pad” and our “range” have a similar effect, a “pad” adds noise to the signal, our [Range] switch does not. Specifications• Input Impedance: 6k• Maximum Input Level at 1kHz (unity gain): +24dBu (Octa module) / +20dBu (500 module)• Frequency Response (-1dB): 15Hz to 30kHz• Frequency Response (-3dB): 7Hz to 40kHz• Equivalent Input Noise (150 ohm source, 60dB gain): -128dBu• Output noise at minimum gain (low Range): -100dBu• Output noise at minimum gain (high Range): -93dBu• Total Harmonic Distortion at 1kHz and +4dBu output: 0.007%• Inter Modulation Distortion at 1kHz and +4dBu output: 0.0002%• Common Mode Rejection: -80dB• Maximum Output Level: +32dBu (Octa module) / +26dBu (500 module)• Current requirement: 85mA (maximum) per rail• Size and weight: Standard 500 Series, 0.6 kilos Iron features our reference bargraph meter and the High-Pass-Filter (Lo-Cut-Filter) from the EQ section of the Ark console. Iron is available as 500 or Octa module with “Silver” or “Black” faceplate Product page on the Interphase Audio website Show more