Dating vintage jbl speakers
I have a 1965 Deluxe Reverb and am trying to figure out if it has a Utah or some other kind of speaker. I also have one of the newer Fender Pro Reverb amps with an effects loop and a silverface Twin Reverb with a volume control. Steve Goldner San Diego Hi Steve, Thanks for your questions. Figuring out which manufacturer’s speaker is in your amp shouldn’t pose a problem unless it’s some aftermarket mystery speaker with no markings.I was thinking of trying a Celestion Gold 50, but I usually only play in my bedroom, and I don't want to increase the amp’s volume. Both amps produce very loud hum whether or not a guitar is plugged in. Or is there some other possible cause you can point me to? Most factory speakers in Fender amplifiers have what is known as an EIA code that specifies their manufacturer.Jeff Bober is one of the godfathers of the low-wattage amp revolution.He co-founded and was originally the principal designer for Budda Amplification, though he launched EAST Amplification (eastamplification.com) in 2010.You should be able to find a number stamped somewhere on the speaker’s frame.The format may look like this: 220 637 Here the number 220 designates the speaker as a Jensen, and 637 indicates a production date of the 37th week of 1956 or 1966.You can catch his podcasts at or email him at [email protected]
Here’s a list of brands along with their EIA codes.
Warning: All tube amplifiers contain lethal voltages.
The most dangerous voltages are stored in electrolytic capacitors, even after the amp has been unplugged from the wall.
Had not been played the last 15-20 years and when I hooked them up to my Klipsch amp today, I started off with Low volumes. Both speaker cabinets have some wear, peeling laminate, some minor splitting along the seams and the rest are cosmetic.
Left speaker had a lot of crackles but it all eventually disappeared after 5-10 minutes. Unfortunately the right speaker has no sound at all. The foam around the kids probably need to be changed also. May give Martin a try when I get back from business trip if I cant find another place to fix it.
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Before you touch anything inside the amp chassis, it’s imperative that these capacitors are discharged.