GSP Audio - Gram Amp 2 Special Edition

GSP Audio - Gram Amp 2 Communicator

It may look cheap and plain but this little phono preamp is legendary for its audio performance! The Gram Amp 2 Communicator phono preamp is THE phono preamp that first made the GSP name synonymous with superior vinyl reproduction and incredible sound staging!

Availability: In stock


The Gram Amp 2 Communicator phono preamp will give an output of 400mV with a medium sensitivity moving magnet cartridge (4.5 to 5mV). Gain is X84 (38.5dB).

Intentionally, its gain is slightly on the low side which makes it most suited for use with medium to high output moving magnet cartridges. This also makes it an ideal phono preamp for the DJ whose disco records can give a much higher output - its lower gain means there's less chance of clipping (overload) so higher volumes can be achieved with reduced speaker wear. This is a truly excellent performer for the money and one would be hard pushed to better it.

Add the PSU1 option for significant further improvement - with it's much larger transformer you benefit from gains in bass weight, dynamics and resolution. The PSU1 is listed as an option when ordering.


Input Range 2mV - 10mV
Output 168 - 841mV for input range above
Maximum Input Level 58mV
Input Impedance Resistive 47k Ohms
Input Impedance Capacitive 220pF
Output Noise ('A' Weighted) -75dB
Reproduction Characteristic RIAA within 0.5dB
Output Slew Rate 7.5V/µS
Gain Bandwidth 2.25MHz
Gain Margin 19dB
Phase Margin 78 degrees
Total Harmonic Distortion Plus Noise <0.02%
Channel Balance 0.1dB
Channel Separation 64dB
Size 115 x 85 x 45mm (4.5 x 3.5 x 1.75 inches) approx.
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