SuperBee
703 posts
Dec 13, 2012
2:01 PM
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Just fitted this speaker in my 78 SFPR.
Replacing original speaker.
What a difference. Heaps more bottom end, much more well-rounded overall. Very happy with the result.
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Rick Davis
1008 posts
Dec 13, 2012
5:23 PM
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Cool! The 10-inch Webers are great. I have the same speaker in my silverface Champ. Sounds awesome. I have two of those speakers in an Avatar cab that I loaned to my GF's son. He plays guitar in pretty good alt rock band. The speakers are nice and crunchy.
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-Rick Davis
The Blues Harp Amps Blog
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SuperBee
708 posts
Dec 14, 2012
1:20 AM
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yeah i'm hoping it'll be good for guitar too. this thing was a real ballsy guitar amp. the tremelo seems to not work though. its had a bias adjustment pot added and i think that somehow interferes with the tremelo circuit...too long ago to remember the details now.
must say, i'm not real impressed with the mounting of the speaker; just 4 self-tapping screws and i had to find replacements for 2 as they were pretty much stripped. amp probably due for a service and tidy up
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5F6H
1457 posts
Dec 14, 2012
3:26 AM
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@ Superbee "its had a bias adjustment pot added and i think that somehow interferes with the tremelo circuit...too long ago to remember the details now."
Usually the bias pot install replaces an existing resistor with a variable resistor (2 tabs used on a pot/cermet pot) it shouldn't adversely affect tremolo in itself, but high bias currents can diminish the tremolo's effect.
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SuperBee
713 posts
Dec 14, 2012
4:02 AM
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Thanks Mark. these mods (there is also a standby mod) were done prior to my ownership. i can't discern any tremelo effect at all. perhaps the bias is set rather high? the previous owner told me it was in the mid range of the possible adjustment, but he also advised that it was fine to use the full range of possible adjustment. i believe you advised me that is unlikely to be OK. I haven't done any tests, just "left well-enough alone".
i'm not worried about tremelo for use with harp, it just interests me that the controls dont seem to make any difference to the sound.
its time i took this one for a service anyway i think
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