Amplifier repair - How do car amps work?? Part 1
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- Опубліковано 21 сер 2017
- So this is what i've been busy with for the last year or so. I have taken my time and learnt amplifier repair, and I actually find this pretty fun and rewarding, as a problem solver. Plus i get to see a whole range of different amps from different brands, see how they work and bench test them. I wanted to make a video going through the real basics of how a class D mono car amplifier works, so that you can get a better understanding of what its doing in your system.
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Ive completed simple repairs on home audio amplifiers in the past and recently had a buddy blow a relatively collectable car amp. Youve done an amazing job at explaining car amplifiers, thanks! now I can go into this inspection/repair much more confidently especially after learning there isn't much difference between car and home audio amplifiers.
Holy cow, I learned more on how amps work from this video than the last 10 years of my research. This is very incredibly well explained and documented, the drawings helped wonderfully also. Never before was i able to find something so detailed.
you not having electronics degree makes you explain things really understandable for the uninitiated
Something ive had a hard time finding on youtube for quite a while, love this channel
great vid! and I wonder how you give this much info openly cause when technicians repair them, they don't even let you see, cause no one would give their knowledge for free, so hats off to you man...👍
true , most car audio guru's are complete douche bags. so yes HATS OFF.
Dude...you could be sitting right here next to me while I'm going through my first teardown/troubleshoot on a similar amp and I couldn't possibly learn anymore than I did in this video. Perfect arrangement of information and perfectly conveyed. Thanks so much.
Oh man thank you so much for this video! You get straight to the point and make it all clear. Well done. Your work in making this is very much appreciated.
Extremely helpful! You've made something I've been struggling to grasp for years make sense to me in less than an hour! Can't wait for part 2
Thanks a lot! Been a decade since I worked on amps- found some Old RF in the shed and started remembering- then I came across this- Wow- you're such an excellent and humble teacher! Subscribed!
Not only do I appreciate videos like this for the information , the altruism and zero ego approach of delivery makes my day!! Thank you kind sir!!!
Someway I eventually found your channel getting into car audio. Im 40 years of age. So, I appreciate this type of content.
I tried repairing on my own for awhile but never got it because I didn't understand the function of the amp and how it works. This vid fixed all that!! I feel more confident than I ever have and am ready to get back in the saddle! I've got a crossfire vr2000d I'm gonna take a swing at. My wife was actually excited that I had failed at it because my desk was always messy with amp parts laying all over, now she's gonna be really pissed!! Thanks for the vid and keep all the pointers coming in because they help also!!
Big Country. Ill trade you a working crossfire vr 1000 for your blown 2000 ?Let me know
This is the best explanation of how an amplifier works I've ever heard. Great video! Looking forward to Part 2! I'd give it more than one thumb up if I could.
One of the best videos i've seen on repairing amplifiers. Really nice to watch ! Great work !
Why hhyg669757557
Thx for the video, I used to work in a repair shop but I often didn't understand how the units worked. Now I have a much better understanding how amps work and how to fix them.
i have built my own amplifiers. one amp i threw together was a 400 watt output stage but driven by a 20 watt realistic home amplifier and it worked very well. that said i really like this technician in this video. he should teach because he explains everything so thoroughly and so clear, the video is actually entertaining. this guy could so easily be a damn good teacher..
This video is the best amp repair vid on UA-cam! I had to do the exact same thing to my Hifonics amp when it blew. All Mosfets, resistors, driver IC, driver transistors, bulged caps. I had to figure it all out on my own with a little help from forums here and there.
This vid WILL help ALOT of people!
hello. i have a couple Samsung subwoofers that interface via wifi to a soundbar.. but i don't have the soundbar. is there any way to hack these active subwoofers? they have no aux input, but there has to be a way to bypass the need for the soundbar? any thoughts?
yes, please!! and there has to be a way to use the crossover, right? i have 2 Samsung subwoofers, which were $1 apiece, so i'd love to use them lol. i know that they were sold at that price because no one knew if they worked, or how to use them.. and it _has_ to be possible. and btw, please link me when you do this video. any idea when you might do it?
I have a bunch of blown amps so im trying to teach myself how to fix them . Thanks for all of your videos. I've learned alot from you. Next on my list of things to buy is an oscilloscope. Thanks again for all the excellent input.
Simply one of the best repair videos I have watched on UA-cam.
Absolutely great video. Not many videos like this past somebody throwing one on a Dyno. Thank you for this, keep up the work
Spending more time watching channels like these. Trying to design an amp for a project, the amount of information to work out can be complex, nothing like a little challenge :)
Wow. What a awesome, Well comentated repair video. So looking for to watching part 2. Learnt so much for this. Thank you for sharing your knowledge.
Thank you for this very good video!! You seem so calm and patient when teaching and explaining things, you were very informative when explaining everything and you do it so well! I have been working and doing circuit bored and cable assembly including troubleshooting and repairs for over 20 years now, I wish I had somebody like you there ti train me and explain stuff to me like you did in this video!
So glad I found the video learnt so much. You get to see inside these electronic items but wonder why so much electronics are needed. I can understand now why all these components are needed and the chap explains it words that folk can understand.Great useful video well done.
hope this video causes gain in business. very professional and honest. sd vs dd part three was long awaited and up to bare vids standards. the champ is confirmed!
Brilliant! Thank you so much for the video. Loads of information. Very informative and thoroughly explained. If you can keep up with him. I've watched it many times . Nice work!
Sam! Congratulations! We're coming up on your 2 year anniversary for amplifier repair videos. Just imagine how many people you have helped and how many now can repair a amplifier. I know these videos helped me.
Thanks for the great video. It really helped me fix my amp. And it was great that you mentioned about not using a power supply with a ground pin. A multi meter is fine but you can really damage a scope doing that with a ground.
Fantastic video. Really well documented and explained! I think I will have a go repairing my Velodyne subwoofer amp
yo i love your video's! could i please get a shoutout??
WorldsDeepestBass which sub? I've a couple dd15's that need boards serviced. Sux that Velodyne quit servicing my model :(
Nathan Mills I'll be servicing my SPL-800i
I completely agree with this comment. A super clear explanation.
I am totally knew go learning the inner workings of electronics and am 11 minutes in and got to say, I love this video already.
I do have a question though. When the signal coming out of the mosfet is 12 on 12 off, does that actually make alternating current as stated, or does that just make it a switched DC current? I've done car audio for 20 years but never actually opened an amp and replaced it, just changed defective ones. I am truly interested in and always have been interested but never really thought about finding a UA-cam channel and not too big on library books so I'm actually super excited to find this channel and some similar ones. Thanks.
This guy is for car amps what Blueglow is for HIFI. Absolutely love the vids. Thank you
Please do a part two! Awesome vid! 2 thumbs up!
Thanks for this video! I will be replacing the supply mosfets on my jl 500/1 and I will definitely use some of your teachings!
Excellent basic explanation of your diagnosis process. Thanks for the video!
Absolutely wonderful video. Thank you so much for documenting this. Great learning tool!
Wow i really learn a lot from this one video compared to many videos i watched before this. Thanks for the theories because it helped to understand what really happening. This is a very good video. Thank you very much.
Excellent technician , I also used to repair car audio and high power amplifiers like Crown. I also used to use a audio tracer I made myself. I got identified with him. Good time . Right now is not cost effective as a business because people doesn't want to pay the repair sometime and your get a junk of equipment with the time. Great video.
your lectures are therapeutic and calming... :) thank you...
Hey keep up the good work am from Jamaica living in florida now am also a repair guy have bin doing it for about eighteen years now.
I needed 5 minutes to be completely fascinated from your tutorial, sorry for having doubts the first minutes :-). now part 2
Great video. Thank you. You are the YT amp repair guy I have been looking for. Be great if you explained a little about the ripple filtering caps on the power supply stage after the rectifier stage.
I'll be watching you.
Wow. Excellent explanation! I learned so much in this video. Thanks!
So helpful great explanations looking forward to part two
Really love love your teaching methods mate!
Wow Sam's back! Great what's up bro? Great vid man also bro well needed.
wow, best electronics class I've ever attended! that amp is pretty much landfill with all of it's problems. lol
Awesome explanation bro! Keep up with the great videos :)
Awesome video very educational. Thank you for taking the time!!
Excellent video and explanation of how an amplifier works.
A lot of good tips man, Thank you!
such a good video! trying to repair my soundstream ref604, this helps me to diagnose it.
Dude, I loved you in Far Cry 3
(but no seriously, this is a pretty good overview. Thanks for posting)
Thank you bro I love this stuff and you explain it very good!!!
Thankyou! I stumbled upon your channel - I gotta massive audio 4ch from early 2004ish a 25.4 with a loose pair of RCA jacks...
This video is CHOCK FULL of good stuff. Thanks! 😬👍
just perfect explanation! thank you very much :)
Thanks for the information. Great work.
Thank you for the nice video, really well explained!
Great video,I enjoyed it so much,I subscribed,I am a fairly keen electronics guy, But after watching this,I would easily try and do a repair myself, Thx brother!
Excellent video!!! Now I have to pull out an old Infinity amp. Most likely, I have issues with the oscillating part.
Excellent description, good job at talking us through the procedures got me to the subscribe
We just got a free lecture for electronics. Thanks man. You must be an electrical engineer?
He couldn't possibly be an electrical engineer. He doesn't even know the difference between AC and DC. Did you hear him at 11:02 say that it's AC because it alternates between 0 and 12 Volts. No electrical engineer would say that. We know the difference. It's technicians that don't know the difference between AC and DC. He is a technician that learned how to change mosfets and other obviously burned out devices.
WOW. That was a very informative video. Thanks
I see your knowledge has grown, I like your enthusiasm on the subject.
Thanks buddy! I know that's an inductor - I wasn't suggesting it was a transformer, I was going to say "transformers and inductors" but the snapped lead took me by surprise and I never finished my sentence haha!
sorry, I watched your video till the end, you probably made a mistake talking about it. Iv'e been doing so much research on this subject and came to the conclusion they (the manufacturer) blow the whole stage deliberately. if they wanted to, they could to trip the circuit when one fault is found. i.e when one mosfet is problematic, so one effects the others (i.e they draw more current then they should and blow)
Yes youre probably right, it doesnt help that these board designs are absolutely ancient technology and the protection circuits awfully slow. On the contrary, the more recently designed Brazilian full bridge amplifiers are awesome for that, if they blow you only ever lose one pair of outputs and maybe the driver, the protection circuit saves the rest - and ive yet to see a power supply section go down either on the Banda amplifiers, the protection is so quick! Its definitely the way forward.
Interesting research. From what iv'e been seeing through the years is that the manufacturing culture in China is, copy and paste innovation, they trade IP for IP, not like the western world that protects IP with patents example: RockFord Fostgate, JL Audio Ect.. In china schematics are in circulation for trade, so the same problematic circuit is found every time as a result of the IP trade and brute force component cost reduction to a point where its a fire hazard product.
Great video, Sam. Thanks mate.
Your videos have helped me so much thank you
Love your videos so I say this in no disrespect; you said 12v is good for car speakers and later said that it is no good. I love the video concepts, I've learned a lot. Good teachers start with a lesson plan and go from there to keep confusion down. Keep em coming
Did I? Where abouts lol? 12v is definitely no good for any speaker as it will just pop the cone up and stay there haha! I talk quite fast so may have misheard.
Amazing knowledge you shared there. Very good video!!
Excellent video! I currently have a Rockford Fosgate P1000X2, that's on my bench. It's staying in "protected" mode, even directly connected to my battery, with no other wires involved.
Output section ☺
This is really good information man!
o my god, i appreciate this so much i can't even tell, thank you man !!
Wow I am actually early to a barevids video? I can't believe it!
P.S Nice video,and I have been meaning to tell you this for a year or and smh but I Have the exact same multi-meter.
Just decided to point that out. :D
Thanks so much for clarifying this mater !!!!!
Wow, my brain hurts. Thanks for making me realize this is way over my head lol. I wish you could fix my 2 maps! You seem like a brilliant guy!
Pretty well explained. I would honestly use solder braid though. Less likely to lift a trace or pad. But over all great work.
Great explanation! Thumbs up!
Great Video, Very well Explained. You should consider teaching you have a gift.
what an excellent job i wonder how many years to take me to be a master on electrician like you!!!!!!!!!
These videos are very helpful, & I have just bought an HP 554602B 150MHz O-Scope like yours, & a variable power supply & hot air station and a bunch of other things & I'm really tiring to learn car audio amplifier repair.
Get yourself a Hakko 808 or equivalent desoldering gun. It makes short work of pulling those Mosfets. Saves tons of times on large amps like this.
and clean the tip, that is definitely neglected
I cannot really say anything. This video deserves more mate, really detailed. Still makes me feel like a student hahahaha
Great video!
I got an old 1996 Orion XTR amp I need to repair. Been fixed once. Pops fuse in the side as soon as power is applied to the remote turn on. Before they replaced a Mosfet or Transistor....i forgot, been 10 years ago last time I looked at it
Nice tutorial, thanks for sharing.
thanks for the beginner class I learn alot
when removing those transistors you can also use a side clipper to clip them at the base if you have enough leg-room and then remove pins individually. It makes the removal safer for the board.
I think you described what happened to my SS AR1.8000D im now on my second** my first one is back in the box until i meet someone like you or become you 😎
You sir are a genius!! Subbed right away!!
a very informative video bro, it will help a lot in troubleshooting, keep up the good work..more videos please..thanks a lot.
Thanks for explaining bro. Bless!
Wow thats a lot of work! Cool video!
great explanation, thank you.
Hurmm nice explaination, i realy wanna learn this stuff.
Excellent explanation!!
Dude, are you an electrical engineer? Nice break down. So much information and clarification on how to repair and what to look for. Nice.
He's no way near an electrical engineer, just his explanation of transformers should be proof enough.
Your explained is so good...👍👍👍
Excellent video!!
You're a very sharp tech !
I would love to see a video of how to repair the driver card i have a atomic 5000.1 and the driver card is bowen !!! awesome info!!
Q&A forum time?
if anyone is available to answer this. Bit of a greenhorn at electronics.
I messed up my sub amp by reversing the pos / neg speaker wires .
I didn't think it would have that bad an effect but anyway, aah.
Opened the amp and everything looks good visually except for one potentiometer which was ruptured as they are designed to do.
I tugged on it gently and it came out leaving two pins soldered to the spot as original. I was gonna somehow solder a new one to the pins.
Will this work out?
I know, you need to know the make, model and can't be sure unless the system is checked etc.
Im just concerned about the pot itself. If I can do it to the best of my ability and if don't work, then I still have a fucked amp. No worries.
Last but not least.
Great video mate. I was riveted. Very well done. (for a pom).
Love this!
I have fixed several older Zed audio amplifiers in the past. Its been maybe 8 or 10 years since I tried repairing one.
Very helpful! thanks!