Supro 1685RT Neptune ReverbSupro USA presents the 1685RT Neptune Reverb amplifier. This 25W, 2 x 12 combo amp was created in response to artist and backline requests for a Supro amp with a pair of 12 speakers and spring reverb. Developed in partnership with SIR, the USAs largest backline rental company, the Supro Neptune amplifier is a loud, clear answer to the Fender Twin and Vox AC 30. The Neptunes microphone friendly midrange is largely derived from its vintage correct, 25W;