Here's all the information you'll need to get in contact with Dr. Z:
By Email
sales@drzamps.com
By Mail
Dr. Z Amplification
17011 Broadway Ave.
Maple Hts. OH 44137
By Phone
Phone: (216) 475-1444
Fax: (216) 475-4333
If your Z amp needs service contact us here:
repairs@drzamps.com