aj,
You can get a pic and a brief description of the Z-man ASE (analog signal enhancer) at the following link: http://www.hometeam.com/ehonline/newsprod.9804.shtml
It used to sell for $200 or thereabouts, but I'm not sure whether or not it is currently being made. I see used ones pop up now and then, which seem to be going for $100 to $120, which in my view makes them one of the greatest bargains in audio today. The Musical Fidelity X-10D is a similar unit, though I believe the Z-man has a slight performance edge and has a good internal power supply instead of a wall wart type. It uses a single 12AX7 tube as opposed to two 6922s in the X-10D. In addition to providing tube-like sonic qualities, these units provide a better impedance match between the source and the preamp or amplifier.
You can get a pic and a brief description of the Z-man ASE (analog signal enhancer) at the following link: http://www.hometeam.com/ehonline/newsprod.9804.shtml
It used to sell for $200 or thereabouts, but I'm not sure whether or not it is currently being made. I see used ones pop up now and then, which seem to be going for $100 to $120, which in my view makes them one of the greatest bargains in audio today. The Musical Fidelity X-10D is a similar unit, though I believe the Z-man has a slight performance edge and has a good internal power supply instead of a wall wart type. It uses a single 12AX7 tube as opposed to two 6922s in the X-10D. In addition to providing tube-like sonic qualities, these units provide a better impedance match between the source and the preamp or amplifier.