Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: mresistor on December 26, 2018, 11:17:51 am
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So a guy brings me a Fender Acoustic Amp 200 with a blown speaker ( it is a 2x8 ) and wants me to help him out.. So I start researching and come to the conclusion that Fender does not provide one iota of support for this product. Wonderful....
I emailed Fender support.. They carry no replacement speakers. I emailed Fender support.. they said the schematic for the product is not available. Wonderful x2.
Does anyone have a schematic for said amplifier?
It has 2 eight inch four ohm speakers. Each speaker has two wires coming from the amp chassis inside the cabinet. I haven't taken the amp apart to look into the chassis. The amp says it's rated at 4 ohms.
So, with two wires going to two 4 ohm speakers what would you think the output transformer looked like electrically? Or do you think it uses two OT's?
Guess I could tear into it...
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Tore into it.. it has 2 toroidal output transformers. Little dinky things..
What do you think of using two 8 ohm speakers instead of 4 ohm?
I found this information on them.. scroll down in the article
http://education.lenardaudio.com/en/14_valve_amps_5.html
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It can't be a tube amp, $550 for 200 Watts, speakers, nice box, and digital frills.
So why would it have output transformers?
I can't think of many/any Eight-Inch speakers can take 100W each, even for acoustic guitar.
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Oh crap, that was a blond moment. .. that's true PRR it's a SS amp.. I should have taken pics of the inside while there.. Where the speakers connect there are what looks like two pairs of toroid transformers.. Now I am wondering what they are. I guess they might be heat sinks for some power transistors?
Well I replaced both both speakers with two 8 ohm speakers with whizzer cones.. similar to original. Goldwood GW-8003.