G-6000 Keeps shutting off

So each speaker is 7.5 ohms. If you run two sets , they are parallel so the impedance is now 3.75 ohms ! if you then parallel a 8 ohm resistor your total impedance load will be 2.5 ohms ! you will likely damage your amplifier if it does not shut off in protection. Also, these are the static impedance numbers , the actual impedance is probably much lower at the lower frequencies. Your amp is rated for 65w at 8 ohms. You are trying to drive too low of an impedance.

You can get away with it at lower volume levels. Also, we do not know the health of your Receiver ? Has it been rebuilt, recapped, and biased ?
 
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Try running with just one pair of speakers . Your receiver will be much happier and high output levels.
 
Dan Tietjen said:
Wow! You have been incredibly helpful! I need to get to work pretty soon, but I'll follow your directions when I get home later tonight. I'm sure I can find those bias/output pots near the speaker terminals inside. I'll just use one of the other 8 ohm speakers I have OR maybe a simple 8 ohm resistor? I'm assuming the probes and outputs to the load are to be in parallel when reading the values? Thank you, thank you, thank you for everything! I really appreciate it!
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I am not sure you need a load (8 ohm resistor ) connected to the speaker terminals to do the Offset and Bias adjustments.
 
OK, if you have isolated a "bad" speaker, it's time to work out why and what has failed internally. It could be as simple as a semi-shorted cap in the woofer Xover filter, or even a piece of wire partially shorting one of the rear terminals. A partial short somewhere along your speaker cable (look for a twist that is crushed under a piece of furniture or something piercing the cable, rat bite etc.

In the meantime, don't use that "bad" speaker until the cause is determined.
 
@restorer-john

The OP joined last night and if you notice this thread was from 24yr's ago and specifically with regards to a CD player causing issues, He hasn't mentioned a CD player

On top of that he created his own thread, 11 minutes prior to dragging this one back up, where he is getting assistance with his what I assume is the issue* not a CD player

*
Dan Tietjen said:
... Each of the 4 speakers is a different make and design, however, they all meter out at just below 8 ohms. (7.5+/-) I'm hoping this receiver isn't THAT persnickety
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Dan Tietjen

Thread 'G-6000 Keeps shutting off'

Why does my G-6000 shut down so easily? I have it hooked to (4) four, 8-ohm speakers, (all working fine and tested at 8 ohms) . When I turn it up to, say, the 10 o'clock position (not very loud), it simply shuts down. Very frustrating, when trying to show off my killer, "Pure Power," vintage receiver to my friends and it turns off like a little wimp. Help!!!
 
Dswankey said:
@restorer-john

The OP joined last night and if you notice this thread was from 24yr's ago and specifically with regards to a CD player causing issues, He hasn't mentioned a CD player

On top of that he created his own thread, 11 minutes prior to dragging this one back up, where he is getting assistance with his what I assume is the issue* not a CD player

*



Dan Tietjen

Thread 'G-6000 Keeps shutting off'

Why does my G-6000 shut down so easily? I have it hooked to (4) four, 8-ohm speakers, (all working fine and tested at 8 ohms) . When I turn it up to, say, the 10 o'clock position (not very loud), it simply shuts down. Very frustrating, when trying to show off my killer, "Pure Power," vintage receiver to my friends and it turns off like a little wimp. Help!!!
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He is new, let's cut him some slack. He joined because he has a problem. Probably did a search and that thread popped up.
 
tutor_turtle said:
A Project Technician (union) 52 years.
I am presently retired.
I work on a few pieces, for people who are able to come to my shop to drop off and pick up.
I turn down more jobs than I can possibly take, I could be working 8-hours days, 6 days a week.
Getting too old to be putting in full time hours.
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Was asking the OP.

I usually use the reply link but was heading out the door.
 
restorer-john said:
OK, if you have isolated a "bad" speaker, it's time to work out why and what has failed internally. It could be as simple as a semi-shorted cap in the woofer Xover filter, or even a piece of wire partially shorting one of the rear terminals. A partial short somewhere along your speaker cable (look for a twist that is crushed under a piece of furniture or something piercing the cable, rat bite etc.

In the meantime, don't use that "bad" speaker until the cause is determined.
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Thanks so much for the input. I will take heed your warning and look into that darn speaker. It's a nice AR 12" 3-way, so it's probably got all the guts in it like you're saying.
 
billyz said:
I just noticed the original post was from 2002 ! Necromancer thread. Well, at least " Dan Tietjen " appears to still be alive.
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Not sure how I'm connected to a forgotten CD post, because I'm pretty sure I just joined here 3-4 days ago. Then again, it could be likely I DID have a failing CD recorder 24 years ago, didn't get much (timely) help from whatever chat room I was in at the time and went out and bought a new one. Very sorry to whomever I ignored or thought of me as ungrateful. Be advised...I am absolutely grateful to all the professional advice I get here. I'm stunned at the love you all have, for keeping this old equipment up and running. Thank you very much!
 
billyz said:
A few things come to my mind. First, you say your using 4 speakers. That is going to be a much lower impedance load, which is more demanding of the power amp. And, using a CD as the source is likely a much higher signal level than your other input sources. Then you add in the additional Low frequency demand on the amplifier. Combine all of that with the higher Volume you are playing at. And now you have a suspect Speaker. Also, We do not know what the speakers are, and their impedance curve and efficiency also play an important role.
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To answer your question above about the health of my G-6000. It was given to me in trade for work I did at a friend's home. (I'm a carpenter) He said the person HE acquired it from had a professional "go through it" before he got it. So, I guess the answer you ask is still a big question mark. I have not cracked it open yet , so I can't say what the work (if any) looks like in there.

As for me, I took one trimester of computer electronics training at DeVry some 40 years ago, and remember just enough to be dangerous. I can barely grasp at what a transistor does, and still don't know how a tube works, and refuse to understand i.c. chips but have a pretty good grip on Ohm's Law and the nature of magnetic fields.

You all who fix this stuff all the time aren't just good at knowing what a component does...but rather, if/then/why pros? Like electronic crime-scene investigators. I don't have the experience (which is KING), at diagnosing unique problems let along common ones. Since, we are likely to be surrounded by electronics for the next 10,000 years... I envy you but I don't mean to be a sponge. Please let me know if I don't belong here. I love the thrill of owning/fixing vintage equipment but could easily ship it off to someone who can "go through it" for me.
 
Dswankey said:
@Dan Tietjen

I see you joined last night so welcome aboard and here's hoping you enjoy your stay here.

It's frowned upon to be cross posting to multiple threads, the other one was from 24yr's ago and had to do with the OP having issues using his CD player.

Does any of what you're experiencing have to do with a CD Player?

TRC

Thread 'Sansui G-6000 shuts down when using CD'

This is a kick butt reciever, but here is my delima:

Sometimes I just like to jam.
So with the bass flat, loudness on, treble full, with the FM on a hip hop/rap station, I can peg the power meters. Yes I know, the FM is compressed.

But when I try the same thing with CD (connected into the AUX), I can only take it to 1/2 of meter before the breaker kicks in.

I can switch off the tone altogether (except the loudness) and I can take it higher, but then it to eventually shuts down.

Whats wrong?

TRC
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I don't know anything about a CD player. Did I accidentally post on the wrong thread? If so, my apologies.

As far as cross-posting, I probably DID do that, in a desperate attempt to reach out to anyone with knowledge about "Sansui G-6000" or "Keeps Shutting Off" issues. Maybe that's how I wondered onto that CD thread by accident. I won't do it again.
 
It was just a heads up, no need to apologize.

I always feel it's best to start from the beginning in order to ascertain what could possibly be the problem.

Dan Tietjen said:
..Each of the 4 speakers is a different make and design, however, they all meter out at just below 8 ohms
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A) First and foremost connecting 4 different speakers of 4 different manufacturers regardless that they are all 8ohm is more then likely the culprit.

What brand and model for each speaker?

Do you have a pair of same manufacture and model speakers that you can hook up in the meantime going forward?

I would start here^ and focus on that as opposed to heading straight to bias/offset alignment.

Dan Tietjen said:
I'll will also look into that bias alignment procedure, as well. I'm still not 100% sure it's a faulty speaker.
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B) What was/is the status of the G-6000? by that I mean is this a recent acquisition? if so do you know if any work was done on it prior?

Or have you owned since new? if so when was the last time you used it prior to the issues your experiencing.
 
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Al rules request you limit yourself to a single thread when requesting technical help. Ask once, and wait for folks to chime in. Dupe threads get deleted.
New posts from the Sansui - Bad CD thread got moved to your thread here ...
 
Oops! Correction. There's actually 3 different manufacturers and models of speakers. And they're built into the walls of my 2000 sf great room. So, I really don't want to cut back to using ONLY 2, as suggest earlier by someone. A lot has been said about the draw-backs of using 4 speakers...at high levels, and the lower impedance values that it creates. Does Sansui warn their customers about this? And if not, why would they even have a (4) speaker interface on the back of the chassis?!

Anyway, I digress. Finding the model numbers of my speakers is going to be tough. I CAN say, that they are all 12," 3-way speakers of 80's vintage, consisting of a pair of ARs, one Technics, and one Kenwood. Nothing exotic like ESS, Klipsch or Magnepan. (Did I mention, the inventor of the latter's son was my room mate in military school?) Anyway, they all seem to work well, (working drivers) and they're all quite responsive. (loud)

This G-6000 was a recent payment for work that I had done for a friend, and HE acquired it from a person who claimed it had just been "gone through" by a professional. Make of that what you will, but I know what you're getting at with regards to it's history. This didn't happen slowly over time. It has been this way ONLY since I hooked it up a week ago and has tripped at lest 8-10 times since then, as I try to find it's "sweet spot" on the volume knob. Very frustrating. I WILL say however, that I replaced a fairly new Sony with it, that just simply died for no apparent reason. Now, I think I'm starting to know why, if it IS from low impedance or a shorted driver.
 
Dan Tietjen said:
..There's actually 3 different manufacturers and models of speakers. And they're built into the walls of my 2000 sf great room. So, I really don't want to cut back to using ONLY 2,
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I get it, but in the meantime, hookup just the pair of AR's and see if the issue keeps occurring,

Dan Tietjen said:
..A lot has been said about the draw-backs of using 4 speakers...at high levels, and the lower impedance values that it creates. Does Sansui warn their customers about this? And if not, why would they even have a (4) speaker interface on the back of the chassis?!
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There's really not a draw back of using 4 speakers, the obvious consensus is either 2 pair of exact make & model or 1 pair of make & model and another pair of different make & model.

Yes Sansui and a lot of manufacturers were very good at explaining in their user/owners manuals and in some cases right on the back of the unit how one would go about it and the preferred way to do it.

Using a Sansui AU-717 for example purposes, note it says "Pairs" of speakers not a Pair and 2 random single speakers

Back of unit

Screenshot 2026-01-29 at 16.28.11.png

From Oem user manual

Screenshot 2026-01-29 at 16.33.34.png
 
You’re measuring the DC resistance of the speakers-not the impedance. And your meter is charging up a capacitor or two, that are in the crossover inside the speaker enclosure. That’s why the resistance starts low, and climbs.
Don’t put a resistor either in parallel or series with speakers-that’s a bad recipe.
I’d assume your bad speaker really is bad-you said disconnecting it made things better.
 
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