The first piece of Tact equipment I purchased (used on Audiogon) developed a bad channel. I called Tact, and they sent me a new memory board via priority mail, which snapped in easily and cured the problem. They considered it under warranty, and did not charge me anything.
My current Tact, a 2150X, (also purchased on Audiogon) was upgraded by Tact to an XDM for a nominal charge and has been totally reliable.
Tact units are different in their operation from conventional audio gear. Some users are unwilling to learn the procedures for making measurements and installing new curves, so blame the equipment. Some dealers simply do not have the time or desire to educate their customers in using innovative products.
My current Tact, a 2150X, (also purchased on Audiogon) was upgraded by Tact to an XDM for a nominal charge and has been totally reliable.
Tact units are different in their operation from conventional audio gear. Some users are unwilling to learn the procedures for making measurements and installing new curves, so blame the equipment. Some dealers simply do not have the time or desire to educate their customers in using innovative products.