Hi all. I have a Thunder T-1 twin amp that is missing its speakers. Any idea what impedence the original speakers were? Secondary impedence of the output transformer? Thanks for the help!
I owned one years ago but the speakers were shot. I ended up modifying the amp by replacing the 2-10's with a single vintage 15. My memory says I installed a 8 Ohm 15 inch speaker so the 10's would have been 4 Ohm in series or 16 in parallel.
I'm sure that doesn't help much as it is based on memory.
I will check around to see if I have a record of the mod. It would be in an old ebay write-up.
M
Yea, I already asked that guy and he’s acting like it’s a National secret.
I did find a site that says the OT secondary was 8 ohms for the 12” speaker and 4 ohms for the 2x10”. Don’t know why someone would make something like that up.