I have sent a mail three months ago about 2 issues and they did not respond me.
One was about the volume defaulting to 30% when you turn on the MHA100, even if the manual states it should memorize last used level.
The second was related to the fact that, if you turned off MHA100 with the PC turned on, in Windows, it gives an error of usb malfunction.
I must say that during normal playback, i have lost connection between PC and MHA100 for maybe half a dozen times in 3/4 months: the PC just stops seeing MHA100 in the middle of playing. One thing i noticed is that it happens sometimes when automatic updates for something show on the PC (itunes update, or windows update or whatever update).
Other times, drop is just not explained.
I do think the second issue i tried to report is somehow related with this loss of connection.
It would be nice if someone at McIntosh at least released a new firmware to fix these BUGS so that the product actually performs as it was designed to.
Please let us know if you get answered to,
Cheers and good luck,
8raynee