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Well at an estate sale I found a Panasonic all in 1 from 1983 with a very nice magnetic turntable(not a changer!)with a real metal platter. It also has a tape deck and analog not digtal tunner!
I got the owners manual and the speakers as well! Everything works good,except that I think the caps are bad in the crossover network on the speakers,because,even with the bass control turned all the way up
and the trebbile set at zereo there is very little bass,some bass mind you but not much! Yet the highs sound kinda bright! I know that these are not high end speakers but they should'nt sound like this!My problem is how do you get the backs off the speakers without doing any damage to the speaker cabinet as the backs are glued on and the front grills are not removeable? The Panasonic speakers look like new,thats why I wanted to see if anything could be done to improve them!(like checking the crossover network!)I've tried losening the glue along the edges of the speakers in back but the backs still don't seem to want to come off! The back reads Panasonic Speaker SB 555 12 Watts Max.Thanks,for your help! Brian
Follow Ups:
I would grab the largest hole saw I could find and drill a hole opposite the tweeter (or just above) on the backside and take a look. If the drivers are screwed from the inside, then you may be able to get at them without damaging the front grill, which sounds like is permanently afixed. If drivers are attached from the front, then you have determined the front cloth has to go. Rip it off. If they are attached from the rear...Take a close look, from the inside, at how the back panel is attached. If it does not appear practical to pull off the entire back panel w/o damage, then pull out the jigsaw and cut a square opening (you will need 4 drilled holes at the corners) of suitable size in the back to remove any drivers and the crossover. Try to do a neat job of it. Keep the cutout, you will be gluing back in place when you are done. You may need a little extra lumber to seal the cuts and/or support your cutout.
This is probably not as much work as it sounds. Save those THRUSTERS!!!
Complete waste of time. Find the nearest dumpster and........well, you know the rest.......
Well I finally got the back off 1 of the speakers! No matter how hard I tried though to pry the back off without wrecking the cabinet ,proved a waste of time,because the sides of the cabinets were very thin pressboard! I discovered why it did'nt sound right.
The factory forgot to solder the cap to the woofer! How did I know this? Because the cap,which by the way is blue and reads 1 MFD 50V.
was soldered to the + side of the tweeter but was twisted only around the wire soldered to the + side of the woofer but the bare parts of the wires were not touching each other! Now I'm sure this does'nt happen that offten!The Woofers are 5" and are 8 ohms model # 16p92sn.
They seem to have a nice size magnet and have rubber surrounds! The Tweeter is 2" 8 ohms model#5ph04SD which looks like a dome! Well now I'm thinking the speakers are ok and thinking of finding some old speaker cabinets close to the same size or smaller that they would work in! I know this all sounds kind of crazy,but since I got some spare time on my hands I figure I'd give it a try.I'm only doing this because my sister wanted an all in 1 unit that played records,since her stereo quit in March! I offered a seperate componet to her but she said they take up to much space and are complicated to use! Brian
Just try another set of speakers and see if you get decent bass response with them to rule-out any damage to the amplifier. If there seems to be better performance that way, then just replace the pair.
-Bill
Actually my suggestion was to dump the whole thing. It can't be worth more than about 10 bucks.
I thought as much but rather than being a killjoy, I thought I'd help him out without being quite as judgemental. It's not my stuff.
-Bill
Since any caps in the woofer circuit of the crossover would be shunted, even if they were bad, you'd still get bass.
I would love to do that! I really don't know whats wrong with them speakers,but I wont know until I get the backs off and THAT'S WHERE MY
PROBLEM LIES! HOW DOES A PERSONS GO ABOUT GETTING THE BACKS OFF WITHOUT DAMAGING THE SPEAKER CABINETS?? Sorry for shouting here but it is frustrating me,because it should'nt be that dificult to get the backs off without damaging the cabinets,and so far I have'nt yet,but
only very small amounts of glue have come off around the edges where the glue is! I guess I just have to slowly keep working around the
edges of the back until I get enough glue removed so I can carefully remove the backs and replace them after I figure out whats wrong!
With my luck as of late Panasonic probaly made nice looking speaker cabinets,but put Cheesey speakers inside! But at least then I could
expermint around with diffrent low powered speakers to replace those if they are damaged or Cheesy,etc.These are not book shelf speakers,these are tall floor model speakers with what looks to be a
6" woofers(made to look like there 8" woofers) along with a 2" tweeter(made to look like there 4" tweeters)and a bass port thats roughly 2"
as well! I'm just assuming this of course because I have'nt been able to get the backs off yet! I just thought someone here at the speaker Asylum had run into the same problem in the past where the backs and fronts of speaker cabinets were glued shut tight and found an easy soultion to getting acess to the speakers,in order to replace or repair them! Thanks for the tip though on what to look for and again I'm sorry for shouting here on the Speaker Asylum!Brian
...it's held on with glue. Makes removal very difficult, so try removing the grills on the front of the speaker.
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