AB Systems series 221

Dean Richard

New member
Oct 11, 2020
1
0
1
53
Pennsylvania
Hello, I just acquired a working amplifier made by AB Systems. It is a ATD Series 221. Does anyone have or knows where to locate a manual and specs for this unit? Thank you in advance for any assistance.
 

Brian Bolly

Junior
Jan 11, 2011
424
26
28
Baltimore, MD
Is it AB International? Your best bet might be the Wayback Machine to see if it crawled the old AB website. AB hasn't been around for maybe 15+ years, so finding documentation may be a bit of a needle in a haystack.
 

Jeff Babcock

Senior
Jan 11, 2011
1,017
22
38
Ontario, Canada
jeffbabcock.org
I had an AB Systems amp (AB Systems is the predecessor to AB International) many many years ago, and it was ancient even then. Cool that it still works! I think what you are talking about is minimum around 30 years old (probably closer to 40) so it is unlikely that there would be much on the internet for it.