HSA Headphone & Speaker Amplifier

HSA-1b Headphone & Speaker Amplifier Overview Reviews Specs Buy Now Headphone & Speaker Amplifier. Direct drive amplifier for True-Ribbon Earfield Monitor headphones, speakers, conventional dynamic, and planar magnetic headphones. Switch Drive. Drive the SR1a, conventional headphones, or speakers. Input Options. Unbalanced, Single-Ended RCA. True-Balanced, XLR. 24 Step Attenuator. Precision 24-step attenuator for rock-solid left/right balance … Continue reading HSA Headphone & Speaker Amplifier