My GFA 5500 has the same poor bas response. I tried replacing the 8 caps on the top but made no difference. I'm going to take the amp apart and try this fix. Fingers crossed it brings life beck to my amp. Can you recommend mfg p/n for the (2) 47uF Caps?
My C4000 has lost amplitude equally on both output channels. It's less than 50% of new amplitude. Any suggestions? Not having a schematic, I'm a little ham-strung.
I have watched several of your video and you have done an excellent job. I do suggest you do some repair on McIntosh, Yamaha and Marantz for get more attention to the channel. Great repair and explanation should generate more views but the brands that you are working may limit the viewers.
Hello Duality Repair I have this same Parasound HCA-500 and the only thing is my fuse from the power supply is blow out 1Amp 250v. Now do you sell these caps and relay for this model and can you make a package for me so I can change both sides power supply and the other side also. The Resean I ask because I live In Puerto Rico and shipping will cost alot & plus the weight of this amplifier. So if you can help me out I will appreciate it. Thank for this tutorial video for Audio Amplifier Repair - Parasound HCA-500
hi nick...i have yamaha m2 amp...my spendor s100 has 3 inputs on back of speakers...low , mid , high...so i had yamaha m2 high and lows on channel A and lows on channel B...never any problems sounded great... now today i go to hook up a Rel sub high level red to right A+ channel Yellow to B+ channel and black to right negative A-...all of a sudden no sound from channel B...on the back I turn the left volume gain control and it workd but the right volume gain and nothing...I thought maybe the Rel sub shorted out a fuse...i took gront pannel off and can' see any of those fuses out...is there another place i don't see where a fuse may be blown out❓
Awesome video, very clear explanations of the repair. Will you be releasing a video of the 8080st amp repair? I have the same issues with bad plate amps, they are a known issue with these DT speakers.
The sonic hologram is so clever. I wonder why the inverted signal doesn’t mess with the original ear (in your example, the left) where it arrives a fraction of a second after hitting the right, again locating the speaker.
I was a 16 year old drummer in 1882 playing with a guitarist much older than me, who sold high end audio. He demoed the Carver Holographic Generator for me and the shop he worked at, and it blew my doors off. Unbelievable. Bucket brigade chips are commonly used in all sorts of chorus and echo stompboxes. I had no idea that was the secret behind these.
After watching Mend it Mark vids, RU-vid sent me to your channel which I’m really enjoying. As a non-technical person could someone please explain to me why it’s necessary to replace the electrolytic caps? Is it because they have a limited lifespan or will new caps actually improve the performance of the amp even if the caps themselves have not yet gone bad? Thanks in advance for any explanation!
Good question. Electrolytic caps do have a life-span, usually much more so than other components. They have an electrolyte liquid / paste inside that dries out over time. As it dries, the capacitors performance degrades.
I really appreciate you posting the part replacements. Hope you’re busy, I’m booked out about 8 months at the moment. Would you mind in the future posting the device number pulled along with the replacement? The outputs can be read in the video, but I was curious what the TO92 package was. Thank you.
I knew all this stuff 30 years ago when I graduated from NEI. Thanks to your videos I want to learn it all over again. We have a throw away society, nobody wants to fix anything any longer but I'm going to give it shot on my 8060 that doesn't work any longer. Thanks!
One of the things that I think technicians like you don't take into account is that a manufacturer will use certain capacitors to get a certain sound that he is aiming for. That means he may have tried many types of capacitors with many hours of listening until he decided what to put. And just because you put something with the same values and the wave looks good on the oscilloscope doesn't mean it sounds the same. This is audio equipment not a TV or a refrigerator. Therefore, when you decide to put something that has the same similar values but is produced by a different manufacturer, you should understand that it can affect the character of the sound.
That may be true, but 45 year old caps should be replaced if you want a piece of equipment to last another 45 years. And I can only use the components I have available to me.
@@dualityrepair4770 It is okay to make the equipment more stable and durable for years to come But if a certain component such as a capacitor or diode is measured properly I think it's better to leave them as they are. Especially if they are related to the audio signal. Because if you start replacing everything like this, you might change the original design of the device. And it can damage the magic of the sound that the designer aimed for. Even if from an electronic point of view everything is measured according to the electircal schem. In terms of sound, this could be a change for the worse.
i disagree, all electrolytic should be changed. He isn't changing the type of capacitors, just replacing them with modern equivalent. I would argue you that the sound after the recap is more inline with the sound when it was brand new - the sound it have currently isn't what it sounded in the 80's. It's often a debate with old resistors too, i can assure you that old crackling carbon resistor "warm" sound weren't a thing when new. He isn't changing elecytolytics for..say.. ceramics or playing with values; so it's fine. My old system sounded "clean" and reactive when new; over time it sounded more "bass" and vibrant with music. I liked it a lot, but a recap brought back it's original "snappy" sound. There will be a difference of course but even if you like it, the morph in the sound is because of components failing.
RU-vid shoved this video in my face but i didn't want to look at amp videos yet Next minute, i end up with an amp with no bass. Had to try and remember the name lol
Your video is very useful and gave me the notion that the ayre mxr i owned has a similar issue. I always felt that the ayre lacks bass weight and resembles little to the reviews i have read. Would you think the ayre would have something like a "c3" lurking in the unit that is hindering the bass performance. Your insights is appreciated. Thanks
Great video. I also love the little Dynascan era BK scopes. Especially the round crt models like the 1470. Sexy! See if you can score a little 1405. So fun!
