The A2H is an ultra high performance, audiophile quality interface designed for safely powering your headphones from a power amplifier. This device features 2 modes of operation that allow you to select between driving loudspeakers (Speaker Mode) or heapdhones (Headphone Mode). 

Connection and operation are simple: the front panel provides balanced XLR 4 pin headphone output as well as the mode switch. The rear panel is where the amplifier and speakers are connected.

In Headphone Mode, the amplifier's output is precisely attenuated to provide safe listening levels to headphones (from 8 to 600 ohms) without sacrificing signal integrity.

In Speaker Mode, the amplifier's output is directly wired to the speaker output jacks and is not affected in any way.

A perfect solution for audiophiles who enjoy both hi-fi and head-fi, the A2H is safe to use with any type of amplifier from tube to solid state as well as common ground or floating output type amplifiers. 

The use of a balanced 4 pin XLR output jack allows for both balanced headphones and/or standard unbalanced headphones to be enjoyed. Both floating output type amps as well as common grounded amps (which have both negative speaker outputs connected to the same ground point) can be used with the A2H.

Floating output amps will naturally only be compatible with fully balanced headphones whereas common grounded amps can be used with both balanced and/or standard (unbalanced) headphones. For users with standard (non-balanced) headphones, all that is needed is our A2H Balanced Adapter.

The circuit of the A2H is focused on sonic and electrical performance and keeps a safe 8 ohm load to amplifiers when in headphone mode. In speaker mode, the speaker input jacks are routed directly to the speaker output jacks which allows for loss-free performance.

The output impedance of the A2H in headphone mode is extremely low which ensures excellent damping factor and frequency response linearity, even with demanding planar and dynamic headphones. This allows for full compatibility with dynamic and planar headphones ranging from 8 to 600 ohms.

High power handling components are used throughout which allows the A2H to be powered by amplifiers with up to 200 watts per channel. Its small form factor and rugged design will make it a welcome addition to your system.

The dimensions of the A2H are:

7" wide (across front and back panels)

5" deep (front to back)

2.25" high (bottom to top)

Slip-resistant rubber feet are installed on the A2H to make it ready for service as soon as you receive it. Each unit is hand built and fully tested both electrically and sonically before shipping out to you. 

Please allow 2-3 weeks for build time of the A2H