They have electrically linked the two speaker frames.
Anyone have any idea why ?
Anyone have any idea why ?
An externally hosted image should be here but it was not working when we last tested it.
Thats certainly a puzzle ? and asks what are the electrical properties of a speaker frame.
Maybe magnetization that each can share the same rate of magnetization over time, or maybe internally in the speaker there is a connection to the frame of each with
a component that we cannot see.
Maybe magnetization that each can share the same rate of magnetization over time, or maybe internally in the speaker there is a connection to the frame of each with
a component that we cannot see.
I thought perhaps the speaker frames are grounded to stop RF pickup being fed back into the voice coil and into the speaker wire into the amp.
I know that Fostex has info on this. They recommend "grounding" the
frames especially on there full range line. They ground it to the - terminal.
frames especially on there full range line. They ground it to the - terminal.
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I have enough Fender amps, never seen one like this. Someone put it in for no reason. Also, I never seen a Fender amp that have speaker wire run from one speaker to the second speaker. All go to a center terminal screwed onto the middle of the speaker board, then branch out to each speaker. I am not sure that is even original.
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Presumably it's simply H&S, making sure any metal is earthed and not floating? - it won't make the slightest difference to it's operation or sound.
There are many Fender amps where they ran the wires from speaker to speaker, for example the Super Six Reverb. I have never seen the frames jumpered together.
It looks like a healthy piece of wire. The easiest way of telling if it does anything is to remove it and replace it with a 50 ohm resistor then put your scope probes across the resistor and look at your oscilloscope while you are playing music.If you see nothing, it does nothing.
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I've seen this on a Sunn combo amp from the late 70's - early 80's. May have been a safety thing. Does the amp have a UL or City of Los Angeles sticker?
Not the ones with only 2 speakers, I owned a BF Vibrolux, A SF Twin and Pro Reverb, they all don't have wires from speaker to speaker. I can't speak for the one with 4 or 6 speaker, but this is a two speaker combo.
I"ll take a stab and guess they are not in the original cabinet.
They were out being scraped up, looks like almost used as
some open back monitor speaker. by where the rubs are.
I've never seen a fender amp with Red and White wire
hanging free like the upper left of the pic. That is not fender
era replacement wire.
The green number stamped on the magnets are likely a date code only
number. As none of the numbers conform to the EIA manufacturers codes
that is the first 2 to 4 digits.
The numbers along the mounting in silver are obscured and paper gasket
on the rear mounting. Not sure if these aren't from some late 90's
to 2000 era. Baskets almost look like the late cheapo Jensens or EMIs.
But who knows. They look to be 12 inch RI Twin. But can't tell.
I've seen them but can't recall in what. I can't recall
if I've worked on and older Twin Reverb or Pro Reverb
that may have had that strap or not.
It's great getting old.
They were out being scraped up, looks like almost used as
some open back monitor speaker. by where the rubs are.
I've never seen a fender amp with Red and White wire
hanging free like the upper left of the pic. That is not fender
era replacement wire.
The green number stamped on the magnets are likely a date code only
number. As none of the numbers conform to the EIA manufacturers codes
that is the first 2 to 4 digits.
The numbers along the mounting in silver are obscured and paper gasket
on the rear mounting. Not sure if these aren't from some late 90's
to 2000 era. Baskets almost look like the late cheapo Jensens or EMIs.
But who knows. They look to be 12 inch RI Twin. But can't tell.
I've seen them but can't recall in what. I can't recall
if I've worked on and older Twin Reverb or Pro Reverb
that may have had that strap or not.
It's great getting old.
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