[Onkyo shuts off with Forte II speakers]

Thanks guys 

 

I set the volume at 80/100 for as long as I could stand it and all did go well.  

 

The fact that all was fine before at lower volume is what makes it not seem like

a short to me but like you, I'll hope for the best.

 

ps: I sure love the Forte IIs!

[Onkyo shuts off with Forte II speakers]

34 minutes ago, 001 said:

ok , so the issue seems to be narrowed  down to the Crossovers , the woofers are ok at 3.7Ohms DCR -

 

if I were you , I would contact @captainbeefheart by PM , send him the crossovers ,  he can check them for you and do any repairs if needed .  

 

Fortunately, captainbeefheart is participating in this thread!  

 

lol I just did the switching the Forte IIs for the R26Fs and they all played fine!   argghhh

 

I have both Forte IIs hooked up again and will work them to see if some Deity felt sorry for me and miraculously fixed everything.      

[Onkyo shuts off with Forte II speakers]

30 minutes ago, 001 said:

This  should not be a problem at all to  re-confirm just to be sure , but the test would have to be done with 2 speakers   versus a single   we could then rule out the wiring , the amplifier , and the woofers of the Forte II ( DCR is 3.7 Ohms /normal  ) 

 

The two R26F play fine at 80; the two Forte II cause the Onkyo to shut down. 

[Onkyo shuts off with Forte II speakers]

1 hour ago, captainbeefheart said:

What do you have for resistance measured directly at the woofer bypassing the crossover network?

 

Are the woofers stock?

 

I am trying to figure out a way for you to test everything with limited test equipment. It would be nice if you could do a frequency vs impedance sweep of the speakers. You can download some free software like Arta and a signal generator app for your phone and do a sweep.

 

37 ohms  (approx)  new multimeter on the way

 

stock afik

 

I will look into Arta

[Onkyo shuts off with Forte II speakers]

Umm, that is 80/100 on the Onkyo amp. 

Seems to me that shouldn't shut the amp down under normal circumstances.

 

Trim level I do not recall seeing or setting?

 

I have no idea to to change from relative to absolute  volume either, sorry 

[Onkyo shuts off with Forte II speakers]

4 minutes ago, mboxler said:

 

How did this test go?  

I was waiting to see if there were objections.  I'll do that today since there were none.  

 

If this is what it takes, I'll be sending them in:       

 

https://www.google.com/search?as_q=Klipsch+diagnose+crossover+&as_epq=&as_oq=&as_eq=&as_nlo=&as_nhi=&lr=&cr=&as_qdr=all&as_sitesearch=&as_occt=any&safe=images&as_filetype=&tbs=#kpvalbx=_eB_sYb_ZOb6yqtsP5vWLkA44

[Onkyo shuts off with Forte II speakers]

2nd Xover:

 

 

[Onkyo shuts off with Forte II speakers]

I've moved to the middle of nowhere with no help nearby Dave A.    

 

I hear you on the tools and fully agree.  I'll have a new multimeter coming today.

 

I'm hoping for more diagnostic help atm.  If none is forthcoming, I will assume it is a crossover problem beyond my capabilities.  I have a Hakko solder station and have done enough with electronics to see that the soldering was poorly done when the caps were replaced on the Xover.

[Onkyo shuts off with Forte II speakers]

If I missed answering any questions, I apologize, it wasn't intentional. 

 

ps: I found that my multimeter issue is actually the probe wires.  I unintentionally cut my probe wires so I bought cheap replacements on Aliexpress.  lol  The probe wires have resistance themselves!!  So until I get decent replacement probes, I am subtracting the probe wire resistance to do measurements.

[Onkyo shuts off with Forte II speakers]

On 1/20/2022 at 3:52 PM, Khornukopia said:

A couple questions. What speakers did you have connected before and how high could they play? Have you performed the AccuEQ set-up process?

Speakers in use are R26F.  I didn't finish the AccuEQ setup since the speakers aren't where they will be permanently placed yet. 

[Onkyo shuts off with Forte II speakers]

I welcome suggestions on how to proceed. 

 

At this point, my best plan is to replace one R26F with a Forte II, one at a time, and turn the volume to 80. 

 

 

[Onkyo shuts off with Forte II speakers]

10 hours ago, captainbeefheart said:

Looks like there may be some small strands stuck on things, maybe there is one making an intermittent short.

 

Also make sure when putting the board back on there are none of the bare wires touching anything.

 

That's an photographic illusion.    (It is far from the actual wire,) 

[Onkyo shuts off with Forte II speakers]

On 1/20/2022 at 5:36 PM, Defacto said:

I reconnected the Klipsch R26F,am listening to them at 80 

and all is fine.

Does this not show that the speaker wires are fine?

[Onkyo shuts off with Forte II speakers]

11 hours ago, mboxler said:

 

Even this doesn't seem correct to me.  Isn't the Forte II K-25 woofer 4 ohms?   I just read another post that said the DC resistance at the speaker terminals measured 4.3 ohms, which sounds right if you add in the DC resistance of the inductor.  He also noted that the impedance of the speaker drops below 4 ohms between 100 and 200hz.  That's a lot of current!

 

Might be interesting to remove the wires from the woofer and measure the DC resistance across the K-25 terminals.

 

I did as suggested on both Forte II.  Each measured 3.7 ohms.

[Onkyo shuts off with Forte II speakers]

[Onkyo shuts off with Forte II speakers]

[Onkyo shuts off with Forte II speakers]

I tried moving things with no change.  I have no other speaker wires.  I could switch them. 

 

I wonder if hooking the Fortes up one at a time and trying volume 80 is a good tactic?

 

Pics of driver and magnet wires :

 

 

[Onkyo shuts off with Forte II speakers]

32 minutes ago, captainbeefheart said:

.4 ohms, yup that is definitely the problem right there.

 

The probes I used were defective it seems.  Another set of probes show both speakers around 7 ohms.  Sorry for the bad info.

[Onkyo shuts off with Forte II speakers]

1 hour ago, ODS123 said:

Ugh..  Is it too late to return them?  Were you told by the seller they were functioning properly?  I know some here wouldn't mind the challenge of sorting out a problem like this - and perhaps you're among them - but it would drive me nuts. 

 

lol it's not a problem, it's a chance to learn!  

I assume most person to person sales come with a taillight warranty.    

It could be he never played them above a moderate volume.

  

[Onkyo shuts off with Forte II speakers]

45 minutes ago, mboxler said:

 

I would describe it more as scuffed or untidy.  Can you take a picture from the other side?  

 

I assumed the bare pads could indicate lack of solder connection.

 

I'm glad to take more pictures if these do not suffice.

 

 

[Onkyo shuts off with Forte II speakers]

This looks bad.

[Onkyo shuts off with Forte II speakers]

16 hours ago, captainbeefheart said:

If you have a multimeter you can put it in continuity mode or lowest scale of resistance and connect the test leads to the input jacks of the speaker. Then wiggle things around and see if it changes to a short circuit or very low resistance.

 

***One speaker shows 0.4 ohm resistance; the other shows 4 ohm.  I want to take a look inside before trying the wiggling.  I guess the 0.4 ohm speaker should be first.***

 

***EDIT:  My Bad.    Both speakers show about 7 ohms resistance.

 

Thank you all for your time and advice!  I'll take some pics of internals later today.

[Onkyo shuts off with Forte II speakers]

I have checked and rechecked for wire issues.

 

I reconnected the Klipsch R26F,am listening to them at 80 

and all is fine.

 

The ex-owner did replace tweeters and caps himself.

Perhaps he never plaid them loud and this could cause the issue?

[Onkyo shuts off with Forte II speakers]

ic ty  I see no way to change speaker ohms anyway.

[Onkyo shuts off with Forte II speakers]

I'm not sure what you suggest captainbeefheart?

 

I plan to switch to 4 ohms as Khornukopia  suggests if I hear no objections.

 

A quick google made it seem like there would be no harm but it would raise

amperage therefore current I assume.