The GR DUAL Pre pedal offers the best compromise between portability and versatility for the modern bass player.
This powerful amp holds two completely independent channels that you can use simultaneously or with two separate professional D.I. outputs with GR Bass quality (really loved by sound engineers and professional musicians). A complete two-mode Overdrive on channel 2, and a complete Compressor on both channels (Volume, Ratio, threshold, two-mode release).

Aux in for your media player and a separate eq on headphone outputs for perfect monitoring. But not only: parallel output for a clean signal, chromatic tuner, send-return for your effects. Is this not enough to convince you? Well, we have designed it in Italy and we produce it completely in Italy with the best components and above all is a GR Bass.


9V DC - 300mA (power supply not included)


W28 x D13,5 x H6,5 cm

W11,02 x D5,31 x H2,56 inch

Weight: 1,4 Kg - 3,09 lbs


black, custom colour

Front panel 1/2

- Input CH1

- Input CH2

- Aux In

- Gain (Ch1, Ch2)

- Deep Filter (Ch1, Ch2)

- Low (Ch1, Ch2)

- Mid Low (Ch1, Ch2)

- Mid High (Ch1, Ch2)

- High (Ch1, Ch2)

Front panel 2/2

- Bright Filter (Ch1, Ch2)

- 2 freq for mid Low (Ch1, Ch2)

- 2 freq for mid High (Ch1, Ch2)

- Pure Sound Ch1

- Output

- Parallel Output

- Headphone output

- Headphone Vol + EQ

Rear panel

Send return

DI Level

DI output

* “The products on the site may differ slightly in terms of aesthetics, weights and sizes. The differences are minimal with respect to the characteristics of the products as the products are assembled manually.”