Accuphase AD-2900 Phono Equalizer Unit

The AD-2900 is a rear-panel phono equalizer module that adds a genuine analog front end to compatible Accuphase preamplifiers.

It runs separate input circuitry for MC and MM cartridges so each gets properly matched gain and impedance, and supports two turntable inputs that can be switched right from the preamplifier's front panel. It's compatible with a wide range of Accuphase preamplifiers going back several generations, making it a useful upgrade path for existing owners.

• Contains equalizer units with boards using glass cloth fluorocarbon resin with totally separated left / right channels
  
• Ideal MC/MM independent input circuit to achieve high noise performance
  
• Differential-style equalizer for high-precision RIAA characteristics
  
• Two input terminals to connect up to two tone arms
  
• Functions that can be operated from the front panel
  
• Memory settings for each input terminal
  
• Robust aluminum case to shield against external noise
  
• MC Gain : 64 / 70 dB switching Input impedance : 10 / 30 / 100 / 200 / 300 ohms switching
  
• MM Gain : 34 / 40 dB switching Input impedance : 47 kilohms ratedDifferential amplifier circuit with ultra low noise bipolar-transistors for MC cartridges.

Compatibility with other pre-amplifiers (C-2820/C-2420 etc)

AD-2900 is

It can also be used for C2850/C-2820/C-2810/C-2800/C-2450/C-2420/C-2410/C-2400/C-290V/C-290.

Regardless of the preamplifier model, the gain is MC: 64/70 dB and MM: 34/40 dB.

Please note that it is different from the display of the gain switching switch when mounted on the following models.

C-2820, C-2810, C-2800,C-2420、C-2410、C-240

Load impedance that can be selected while the MC input varies depending on the model of the preamplifier.