The Hafler HA75 Tube Head Headphone Amplifier is a vintage-inspired, 100% discrete Class-A headphone amplifier featuring a single 12AX7 vacuum tube.

Key Features & Specifications

• Tube & Power: Uses a 12AX7 tube powered by a non-radiating 140V charge pump to maximize headroom and add warm second-order tube harmonics.
• Negative Feedback Control: A front-panel dial lets you adjust the amount of negative feedback to shift between a clinical/solid-state response and a warmer tube response. 
• Focus Control: A unique circuit designed to simulate the soundstage of listening to physical loudspeakers in a room rather than traditional in-head headphone imaging. 
• Inputs & Outputs: Includes balanced XLR and gold-plated unbalanced RCA inputs, dual 6.3mm (1/4-inch) headphone jacks, a Thru-out loop, and a Line/Tube-out to use the unit as a tube preamp. 
• Build Quality: Housed in a heavy-duty 14-gauge steel chassis with a black anodized aluminum front panel to block RF and magnetic interference.

This unit was used in a smoke free studio and works great. It is built tough. It can be used as a tube preamp for other gear to add tube warmth to your sound. Don't miss out on this great price. Purchase the Hafler HA75 today.