The optional Phono board PH-2 for the REVO IPA-140 amplifier adds to the device the functions of impedance matcher, RIAA equalizer and preamplifier, to receive a signal from a turntable.
It has the peculiar characteristic, and probably unique in its genre, to be made in dual-mono layout: the two channels are placed on two independent boards, and the power supply is separately stabilized and filtered, to deliver the best possible quality.
It’s able to receive signal from MC (Moving Coil) and MM (Moving Magnet) turntables, simply by replacing an integrated circuit (provided as standard). 
It’s possible to vary the load seen by the head by moving a switch, that commutates between 4 standard resistance values (100,500, 1K, 47 Kohm) and a user-definable value, which can be chosen by inserting a resistor.
The gain value is variable with a similar system, with a range that goes from 34 dB to 52 dB in six steps, plus a value definable by the user, again just by inserting a resistor.
 The PH-2 board is made with very-low-noise components, which are able to handle turntables with a robust output, and also work perfectly with heads that have a lower sensibility.
With its very accurate layout, that makes the setting operations very simple, this board will let you appreciate at best the expressive nuances of an analog source, without compromising its natural character.

- Optional board, to be fitted in a main line board (Left & Right).
- 2 mono single mono phono board, independent for Left & Right.
- Both, MM & MC pick-up
- Two different OpAmp for MM & MC pick-up, can be easily swapped by the user, to achive the best S/N ratio.

Note : Specification subject to change without notice

Phono Input Impedance: 47 KOhm, 1 KOhm, 500 Ohm. 100 Ohm, Spare
Phono Gain: 34 dB, 38 dB, 42 dB, 46 dB, 50 dB, 52 dB, Spare
Output Voltage: 24 V Peak to Peak

Note : Specification subject to change without notice