This is Altronics catalogue number K5508. Described in Silicon Chip April 2011 issue. You don't need to buy the magazine, the kit includes full instructions.
This battery powered headphone amplifier offers a signifigant improvement in performance over plugging straight into your ipod. Particularly with larger enclosed type headphones which are not as efficient as their earbud counterparts. This Kit will give you a substantial gain in signal-to-noise, distortion, dynamic range and overall volume, not to mention a great deal more listening plaeasure. Kit comes complete with screenprinted handheld case. Requires a 2 xAA batteries.
Important Note For Kit Buyers:
This product is supplied in component form and requires soldering, drilling, and assembly. We recommend users are familiar with at least basic electronic principles and have the ability to solder.
Please note, once assembly has been commenced we are unable to honour any warranty claims.