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I didn't use the plexi switch... I have the 100w amp model (can be used with amp from 2w to 100w) I use it at home (recording, just playing and on stage) The only limit of the attenuator is when the sound of your amp is : 20% the amp and 80% the speaker, like my supro because the speaker had to be s...

The Ho's attenuator = ultimate attenuator + all options !!!
M. HO is the inventor of the UA. He can build UA with all options. Mine works fine with all ohms Amps (2 to 16 ohms).

Thanks guys about your advice. I'm gonna try to pull off the outler tubes and no mods on this "perfect" amp.
I have not yet tried my Ho's attenuator with this amp. This attenuator works fine with my 1967 100w jtm45 and my 1964 fender vibroverb clone.

Thanks !!!

UP

Does anyone done this mod (half power switch ) ?

Thanks

Hi I'm a new owner of a Custom 100 DR103 from 1976. Harry Joyce signed inside chassis. Perfect condition and Great sound. I bought it with a 1972 sound city cab customized to gilmour 4x12 Wem. I love Faces (Ron Wood) sound and now I have both Ron Wood gear: Hiwatt from small Faces to Faces Ampeg fro...

Hello, I'm new on this forum. I just bought a Hiwatt custom 100 DR103 from 1976 with a wem cab ( 1972 sound city with fane, customed to gilmour wem cab). The DR103 is in perfect condition, Harry Joyce signed. I'd like to add a half power switch like the ronnie wood amp ( through the extreme left hol...