Wow these were legends back in the day. I had a 923 and these things rocked. You could beat on these all day every day. They Don't build them like this any more!
Remember: On older amps, the RCA Ground or AMP-Ground has no direct connection to POWER-Ground. That's why the signal was a bit wobbly. There is a resistor between the Grounds to prevent ground loops. The Signal Ground comes from the Headunit. You should ground the oscilloscope to RCA and not to Power-GND.
Had this amplifier and the 923 which I purchased back in the early 90's.... They were amazing amplifiers until they got knocked off at a train station car park.... The 1023 cost me $1200AU and the 923 was $750AU which was a lot back then.... The head unit I had and still have is the KRC950.... To my knowledge, the head unit was one of the first for Kenwood in that series to feature a detachable faceplate as an antitheft deterrent and I can safely say that it worked as intended.... Incidentally, that cassette deck, no matter how bad the condition of the cassette tape was, it would play it perfectly even if it has been previously chewed... Something that really struck you when you put the same cassette in your mate's Sony head unit....
I hvae a new Orion XTR 750.4 that started to have a popping and buzzing sound and would sometimes quit working. I found a large bus bar with that same problem. I added solder to both sides and fixed it. 2 years ago.
Bro. I still have one of these and the 2 smaller vs. also the big pioneer from the same period, i recently fixed an Alpine from mid 90's and a newer Alpine. easy peasy. lol
This video coming at the right time. I was just handed an old amplifier from the 80's that will perform well once fixed. It's failure is likely something similar. It's a pro audio amplifier. Will likely need bias adjusting as you mention. looking forward to that video.
I haven’t watched the video yet but I am betting it’s a transformer improperly soldered issue. It’s very common since they don’t use any adhesive or glue to hold the transformer.
Wow these were legends back in the day. I had a 923 and these things rocked. You could beat on these all day every day. They Don't build them like this any more!
DUDE! you're gonna be a class AB expert in no time, at this rate. killing it on these vids btw.
I admire your enthusiasm and willingness to share all those golden nuggets you keep dropping for us 🙏 a true teacher
Remember: On older amps, the RCA Ground or AMP-Ground has no direct connection to POWER-Ground. That's why the signal was a bit wobbly. There is a resistor between the Grounds to prevent ground loops. The Signal Ground comes from the Headunit. You should ground the oscilloscope to RCA and not to Power-GND.
Bro I remember when your videos were only getting 100 likes in weeks even months keep it up your doing great 🤜🤛💪
Had this amplifier and the 923 which I purchased back in the early 90's.... They were amazing amplifiers until they got knocked off at a train station car park.... The 1023 cost me $1200AU and the 923 was $750AU which was a lot back then.... The head unit I had and still have is the KRC950.... To my knowledge, the head unit was one of the first for Kenwood in that series to feature a detachable faceplate as an antitheft deterrent and I can safely say that it worked as intended.... Incidentally, that cassette deck, no matter how bad the condition of the cassette tape was, it would play it perfectly even if it has been previously chewed... Something that really struck you when you put the same cassette in your mate's Sony head unit....
These amps were the nuts. If only Kenwood was still the same. Great job.
I hvae a new Orion XTR 750.4 that started to have a popping and buzzing sound and would sometimes quit working. I found a large bus bar with that same problem. I added solder to both sides and fixed it. 2 years ago.
I've an Alpine Pdx 600.1 that I don't know where to start with but I'm gonna learn
Bro. I still have one of these and the 2 smaller vs. also the big pioneer from the same period, i recently fixed an Alpine from mid 90's and a newer Alpine. easy peasy. lol
I had acouple kenwood 923 running bridged 2 ohm load pulling all the power i could from them sounded really good.
I tinker with a lot of vintage home audio gear and I've encountered this quite a few times. Nice job figuring that out!
I've got the same Amp, its a beast and sounds incredible fast! a great example of a high slew-rate desing i would say.
Damn Kenwood amp is a quality built amp!
This video coming at the right time. I was just handed an old amplifier from the 80's that will perform well once fixed. It's failure is likely something similar. It's a pro audio amplifier. Will likely need bias adjusting as you mention. looking forward to that video.
Great video Sir keep up the good work I have alot of those old school amplifier working on too nuff respect Sam 👍 🙏
Best channel
I have lots of old AMPs, as older as from 1990!!!! And ive repaired a few . These are pioneer gm 1000, 1500, 2200 and so on...
Great video
I haven’t watched the video yet but I am betting it’s a transformer improperly soldered issue. It’s very common since they don’t use any adhesive or glue to hold the transformer.