Kevin Dean Posted May 2, 2018 Share Posted May 2, 2018 Just putting new valves in guess which is which ? Quote Link to comment Share on other sites More sharing options...
Kevin Dean Posted May 2, 2018 Author Share Posted May 2, 2018 Just out of interest the ABM 400 was a deeper in tone with exactly the same settings , But I think that is due to the ABM1000 having internal adjustable filters that were probably backed off as I know a few 8x10 cabs were blown in its development . Quote Link to comment Share on other sites More sharing options...
RandomBass Posted May 3, 2018 Share Posted May 3, 2018 Randomguess.... 400 top, 1000 bottom 🎸 1 Quote Link to comment Share on other sites More sharing options...
naxos10 Posted May 3, 2018 Share Posted May 3, 2018 By the size of transformer in the bottom picture (unless it is an optical illusion) I agree with RandomBass. 1 Quote Link to comment Share on other sites More sharing options...
RandomBass Posted May 3, 2018 Share Posted May 3, 2018 Either way, tiny transformers compared to the toroidal ones. 1 Quote Link to comment Share on other sites More sharing options...
Kevin Dean Posted May 3, 2018 Author Share Posted May 3, 2018 yep top one is the ABM400 ..interesting to compare to the inside of a MB head that's half the size & still looks empty . Quote Link to comment Share on other sites More sharing options...
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