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Post by johnnyquest on Jan 20, 2024 23:06:00 GMT
I own a Wurlitzer 2710 jukebox. This has a after market amp in it. This jukebox calls for a 544 amp. Now all of my speakers are not original. My jukebox originally called for 12" 16ohm, 12" 8ohm & a 4" 6ohm speaker.They put in a radio shack 40 watt pa amp with all 8ohm speakers. I would like to go back to original amp. I am looking for one. My question is can i use a different amp? What would work & how would you plug it in?
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Post by jukeboxmarty on Jan 20, 2024 23:31:28 GMT
The Wurlitzer 2700 series jukeboxes use a model 544 amplifier. You should be able to use the replacement speakers.
If I were going through the trouble of locating and buying a replacement for that Radio Shack thing, I would try to obtain an original amp.
Keep in mind that most original amps are offered as-is, and probably need considerable work and many times are sold without tubes.
-Marty
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Post by johnnyquest on Jan 21, 2024 0:01:38 GMT
I am looking for one. I went to the parts selection here & emailed different places but haven't heard back from them. If you know anybody let me know. If i cant find one, is there an alternative amp i could use?
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Post by jukeboxmarty on Jan 21, 2024 0:20:24 GMT
Wurlitzer amplifiers 543 (for the model 2600), and 545 (for the model 2800) should be plug compatible.
I'm pretty sure a 546 solid state amp would also work, but that needs to be verified.
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Post by johnnyquest on Jan 21, 2024 12:27:31 GMT
Another question i have is with this aftermarket pa amplifier that is there it has a loud hum & also picks up noises like when the brush goes across. Would it work if i put in A RIAA equalization PRE AMP before he amp to eliminate the noise?
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Post by jukenorman on Jan 21, 2024 15:47:31 GMT
No, not if it has the original ceramic cartridge (or a replacement ceramic for that matter!). Muting the amplifier when it's not in use would probably help but if there is an inherent hum while a record is playing, that would be another issue.
Norman.
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Post by johnnyquest on Jan 21, 2024 16:38:04 GMT
Thank you. The hum is there when it is idling & when the brush goes across you can here it thru the speakers.
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Post by jukenorman on Jan 21, 2024 16:58:13 GMT
When you get the correct amplifier, it will be muted until the record is about to play and then mutes again when the record cut off switch operates. If you can replicate the muting operation on the aftermarket amp, then it will be quiet other than when a record is playing.
Norman.
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Post by johnnyquest on Jan 21, 2024 17:08:06 GMT
Thanks again, looking for that amp but so far nobody has any.
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Post by johnnyquest on Jan 26, 2024 15:56:35 GMT
I am still looking for an amp for this jukebox. Since it has an after market amp in it, would a tube amp sound better than the one i have? Everyone says tube amps have a better warmth to it. I still see they sell them.
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Post by jukeboxmarty on Jan 27, 2024 4:52:21 GMT
I can't say if a stock Wurlitzer amplifier would sound better than what you have now.
Although I'm sure a Radio Shack amp doesn't sound the best!
All of the Wurlitzer components were designed to work together...
The cartridge, speakers and amplifiers were all engineered around a desired frequency response, and designed to work together.
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Post by johnnyquest on Jan 27, 2024 13:12:49 GMT
Thanks again for answering my question. I was wondering if i bought a new tube amp if the sound would be any different from what i have now. There has to be some how to put today's amps into old jukeboxes. When i got a hold of victory glass they said they are working on amps for jukeboxes just like they did with the seeburg amp. Long way down the road.
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Post by jukenorman on Jan 27, 2024 16:19:30 GMT
I know nothing of the amp you have installed, are you not happy with the sound? We're not talking hi-fi here so I would expect the sound to be acceptanle, maybe not wonderful but listenable at least. Do I recall that you replaced the main cabinet speakers? Where is the sound lacking? Another question I would have is about the phono cartridge and how it's connected to your amp. Originally your jukebox had a ceramic cartridge - is it still the original that's fitted? Is the cartridge still OK, ceramics are prone to deterioration with age. And if the cartridge is OK, what input on the amp does it connect to and has there been any modification to that? Maybe you're pointing the finger at the amp and it's not the root cause of your issues?
Norman.
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Post by johnnyquest on Jan 27, 2024 18:36:05 GMT
Yeah i wish i could have heard it with all of the original parts. The amp is OK, not the old cartridge it has a SHURE N44C needle. Seem to always hear the noise when changing records & brush hitting the needle.I didn't know if a newer tube amp would make sound difference. Doesn't seem to get enough bass.Overall it sounds good. Otherwise all mechanically good.
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Post by jukenorman on Jan 27, 2024 22:08:24 GMT
The Shure M44C is an excellent phono cartridge so no issues there, is the stylus in good condition? I'm surprised that you are lacking bass! I would have expected that even the most average of sound systems with an M44 would have compared favourably with what Wurlitzer installed! I also seem to have confused you with another poster where I thought you had changed loudspeakers. Is it all connected in phase - if you run a single channel, does there appear to be more bass? As I previously said, you could fit a simple muting circuit on the amplifier if you were technically minded.
One other thing you need to be aware of, an original Wurlitzer 2700 amplifier would not be "plug and play" with the M44.
Norman.
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