I think shielding air cored coils or other coils without a complete independent magnetic circuit is a complicated topic and is best avoided in a speaker crossover.
For one thing when done properly in a crossover there is no remaining problem that needs to be fixed. Further, you talk of aluminium. Although this avoids closing magnetic circuits, it may cause current to be drawn into a shorted turn.
For one thing when done properly in a crossover there is no remaining problem that needs to be fixed. Further, you talk of aluminium. Although this avoids closing magnetic circuits, it may cause current to be drawn into a shorted turn.
I think the photo looked like the coils were not placed properly. But a closer look shows they are arranged in the proper way. The capacitor that I forgot to change out is marked 470N 160v -+10%. I have a few of those rectangular grey 0.47uf MKP x 2 -+10% 250v capacitors used in power supplies, etc...would they be Ok to use do you think?
Attached on the cabinet there is a measured frequency response (on the supplied photo), indicating loudspeaker sensitivity of 84 dB/2.83V/1m, which is rather low. So they need more power for the same SPL as other speakers. But be careful not to drive them very hard, those vintage speakers can not handle too much power.
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No, they are not, but maybe it is not so necessary to rearrange them. There are three coils on the left, rotate 90 degrees the one in the middle, with the openings in the left-right direction. Below the biggest coil there is another small coil on the bottom, rotate it 90 degrees also, with the openings in the top-bottom direction.
Yes, they are OK.
The 84 db sensitivity and although specified as 8 ohms, they could have a relatively higher impedance somewhat above 8 ohm which is why the volume control needs the extra rotation to 11 o'clock.
With you 0.47uF/470n capacitors fitted that should be as near to the original as possible.
Status Quo at full tilt I imagine is a good pick me up for covid 19 blues.
With you 0.47uF/470n capacitors fitted that should be as near to the original as possible.
Status Quo at full tilt I imagine is a good pick me up for covid 19 blues.
You are right about that, they read 11 ohms at the speaker terminals. These speakers sounded like crap on bass when I first got them but after the recap of the crossovers they slowly opened up, it must have been the stiffness of the woofers spider and the Big polypropylene caps forming or burning in whatever that's called? Anyway, now they sound great. I will connect them up with a Sansui G-4700, its only 50 watts and see how they go on that. I'll have to wait until my daughter comes around to move them for me, they are heavy. My daughter is as strong as an ox from rock climbing, abseiling, etc..lol
I wouldn´t worry and enjoy them as-is, specially since you like how they sound AND they can get loud.
They are simply less sensitive than others you own, so what?
Speaker complement is excellent.
They are simply less sensitive than others you own, so what?
Speaker complement is excellent.
If they were not rated at 50w RMS per channel Max I couldn't care less but because I have to crank a 110w amp on the speakers for them to perform gives me cause for concern? I will try the 50w amp on them and get back with the results?
Ok, I took the 50w per channel amp to the speakers, it drives them no problem, its past midnight so I can't turn them up but I would say everything is good so thanks again for the advice fellas.
Aluminum foil has ZERO magnetic shielding properties but if close enough will behave like a shorted turn and change inductance for the worse.
DO NOT "SOLVE" A PROBLEM YOU DO NOT HAVE.
And even less create a new one.
Enjoy your fine speakers as-is.
Well, I hooked the speakers up to a 50w Sansui G-4700 receiver and they sound great as they did before but now the volume is between 9 and 10 o'clock and I can turn the HF switch on the back of the speakers to Flat when before it was on -6db to quell the shrill of the tweeters. These speakers love the G-4700, they have the right synergy.