I'm offering up my beloved McIntosh 225 amplifier and MX110 preamplifier with the desired Z serial number. I bought this set from the original owner 12 years ago and it has been my daily user for most of that time. The 225 is in great working order and the MX110 works but it does need servicing. For example one channel is weaker than the other and the tuner section stopped working a few years ago. Somewhere I have the original manuals for these units and I can't promise I'll find them but I will tear this place apart looking. Thanks eBay friends!