Sony APM 790 Speakers - Disassembly, Cleaning, & Capacitor Replacement (repair)

[@TuiCatNZ]

Lol. Your right about them not being audiophile. That's a joke of a crossover. Who knows if the driver's are good, but if you like them, getting a proper crossover made for them would probably be a huge improvement.

[@trulyblessed5236]

Hi i have a paur of apm speakers from Sony... It sounds good. How will i know if the crossover is right for my speakers?

[@scottlowell493]

Not to mention, the tweeter sounds tinny and spitty. No fidelity.

[@BostonMike68]

I have the same speakers and I was hoping you would share what kind of caps you got because I don't how to figure it out I don't know why you wouldn't share that

[@norbertro8709]

You have to glue the back, otherwise you will have vibrations. Also someone suggested a little work on the wood, it's a good idea for the next time :) Overall a nice presentation.

[@myaacount]

Wow impressive, i have a Sony APM 910AV model & one of the tweeters is winded but the quality is not the same as it use to be for HIGHS, i think i need to replace both tweeters... By they your model looks nice in Wood color & i wish i got the Sony APM 910AV in same color but my is in BLACK...

[@TheTarrMan]

I just watched a digi-key to do this and I chit you not the total after shipping was $6.66. I have the exact same speakers. I'm underwhelmed by them listening to them on my Pioneer SX-1250 and I'm going to try this. I also just bought some Pioneer AMP 100's (Going to pick them up Monday) this should be interesting.

[@kotokoto9472]

Hi an audio review with these speakers can you?

[@yvesboutin5604]

This is a nice video and it is obvious that you love those speakers a lot, but at the same time I am a bit surprised that you didn't try to upgrade them. Of course, these are your speakers, so you treat them as you like, but if they were mine, I would have made the effort to put better quality capacitors to replace what is the cheapest on the market. Also, since the back was completly open, I would have put a piece of wood horizontaly in the midlle of the box to stiffle those pesky vibrations we hear at specific frequencies. Maybe a little bit more damping material could also help with the 'midrangy' tonality you were speaking of. Even the plastic pedestal could have benefit from a bit of weight and damping, because these too can transmit vibrations. Now, I challenge you to modify only one of the speakers and try a right/left demonstration with a monophonic recording. You can record the difference and show us how much it will have improved the quality. Do you accept that challenge?

[@crazymetallian]

those were polarized caps.... i had amazing resoults using non polarized polipropilene caps which are the ones being used today for crossovers...

[@nathanmorrow6981]

"NP" non-polarized

[@barbarahoppes1870]

Very well done video...love your voice..so calming!

[@Btos_90]

Wow amazing job!

[@TechStuff1]

Thank you!

[@midorihibiki]

Wow they look like planar or electrocstat speakers. Nice vintage Sony speakers.

[@zsoltboczen5231]

The video mentions re-foaming. Just for the record those speakers do not have foam, but textile surrounds so they won't rot.

[@Tupeboy]

condensadores tienen que ser no polarizados

[@speakertester.1861]

I tought it had a bigger magnet on the woofer

[@josephlalock8378]

you make a point of showing that the capacitors are non polarized yet you replaced them with polarized capacitors. i personally do not use electrolytic capacitors for electronics in speakers, i use film capacitors made for crossovers. but they do make non polarized electrolytics for crossovers also.

[@salvadorrodenas3071]

It is quite deceiving of how (in quality) low Sony went with this APM speakers compared to the APM-77ES/ APM-66ES/APM-22ES.

[@krismichalsky]

OMG, that cabinet is screaming for some poly fill, at least on the sides and back of the cabinet.... Anyone agree with me?

[@1969leonar]

Yes, fiberglass foam

[@yvesboutin5604]

Yes, I agree with you. Plus some bracing inside the box and damping for the plastic pedestal!

[@salvadorrodenas3071]

Yes!!!!! Someone opened it before and removed the glass fiber. Not all is aesthetics, what you don't see can be more harmful to good sound.

[@josephlalock8378]

no, i don't use polyfill in ported speakers myself. a better damping material on the rear wall might tame midbass coming from the rear of the woofer... like some eggcrate foam.

[@BostonMike68]

Those magnets and that frame is thin what is that.5 " particle board I would reinforce the center spray the inside insulation spray let it expand then spray with flex seal and the be sturdy and non resident then put 10" driver's and 3".5" full range mids and a nice 1" soft dome tweeter put insulation two way tape on the back of speakers replace the posts with some new ones and you would have a speaker that would rival anything I just did the same thing to a shit pair of Technics and they are now the probably one the best I ever heard I would put a whole new crossover not a couple of caps I buy them pre made for $25 and they Prof built

[@tomasdub7382]

Next time, foil capacitor.