01-05-2015, 03:43 AM
well, when the output transformer is original the amp runs at 16 ohms.
but thats going to be different now. the 0990774 is a reissue super reverb transformer.
those had 8 and 4 ohm taps. so I assume the tech that installed it hooked up the 8 ohm tap to the speakers and the 4 ohm tap gets engaged if the auxiliary speaker out is used.
which means you can get two 16ohms speakers and run them in parallel or get two 4 ohm speakers and run them in series.
I'd go for the 16 ohm speakers because you'll have more options. not many people make 4 ohm 12 inch guitar speakers.
the gv-22 is about 45 watts. same as a super reverb, so the output transformer is an acceptable substitute.
if you want something more akin to the original Heyboer or mercury magnetics would have one I think, but I don't think its necessary.
I have a schematic for the GV-22 and will post it soon. in the mean time go to the "docs" page on this site and look at the 1971 catalogs. there is some info there. I will post one of the pages here.
but thats going to be different now. the 0990774 is a reissue super reverb transformer.
those had 8 and 4 ohm taps. so I assume the tech that installed it hooked up the 8 ohm tap to the speakers and the 4 ohm tap gets engaged if the auxiliary speaker out is used.
which means you can get two 16ohms speakers and run them in parallel or get two 4 ohm speakers and run them in series.
I'd go for the 16 ohm speakers because you'll have more options. not many people make 4 ohm 12 inch guitar speakers.
the gv-22 is about 45 watts. same as a super reverb, so the output transformer is an acceptable substitute.
if you want something more akin to the original Heyboer or mercury magnetics would have one I think, but I don't think its necessary.
I have a schematic for the GV-22 and will post it soon. in the mean time go to the "docs" page on this site and look at the 1971 catalogs. there is some info there. I will post one of the pages here.