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Topic:
HELP!!! SpeakerCraft & Elan Z System
This thread has 9 replies. Displaying all posts.
Post 1 made on Wednesday May 29, 2002 at 21:52
build4u
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84
I have posted regarding this problem before but didnt get much info back. I'll try to explain again what my problem is.
I have 2 Elan 630's and 2 SpeakerCraft BB835 amps. I am having aproblem with the 12V tigger to turn on the amps.
One amp works fine with the trigger and turns on and off when the 630 is on or off. The other amp switches on but never switches off again. I hae tried all possable combinations with the same problem. I have tried to trigger the amp on and off using a 12v battery and it works fine. When the amp is hooked up to the 630 and I turn on the 630, te amp turns on. Then I turn off the 630 and the amp will NOT turn off. I have the switch set to 12V trigger. When I remove the mini plug from eather the 630, or the amp the amp turns off but if I plug it back in the amp will turn back on. If I leave the plug out for few seconds, the amp will not turn back on. When I remove the mini plug, I do hear a small crack sound coming from the speakers. Not loud or anything just faint.

I could remove the amp and return it to the dealer for a new one and he is fine with that but I am trying to save the hassle of removing the amp from the rack first.

I could realy use some help with this one if anyone has any thoughts I would be greatfull.
Post 2 made on Wednesday May 29, 2002 at 22:15
John Pechulis
Loyal Member
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July 2001
7,127
Try using the 12V trigger from the Z630 to trigger a relay, and have the relay switch power to the amps.

Use a 1A 12V power supply for the trigger power to the amps.

Another idea would be to use a Niles AC-3 switched outlet. It uses a 12V trigger to activate the outlets.

JJP
Post 3 made on Wednesday May 29, 2002 at 23:33
Larry Fine
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August 2001
5,002
Build, have you tried swapping the two triggers, amp for amp, so you will know whether it's the one amp or the trigger feeding it? Process of elimination.

Larry
www.fineelectricco.com
Post 4 made on Wednesday May 29, 2002 at 23:37
phil
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December 2001
2,164
It sounds like a capacitor is staying charged up on the trigger input for the amp that stays on. Have you tried swapping amps, or 630's? If you turn the offending system off, will it go off eventually? You could try putting a 1k resistor across the trigger to discharge the cap quicker.

phil
"Regarding surround sound, I know musicians too well to want them behind my back."
-Walter Becker
Post 5 made on Thursday May 30, 2002 at 16:40
Hector
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April 2002
39
The 1K resistor in the message above may get abit hot. Use a resistor that is rated at least 1/2 watt.


This message was edited by Hector on 05/31/02 23:07.41.
Post 6 made on Friday May 31, 2002 at 20:09
tsvisser
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March 2002
1,228
Another remotely possible explanation could be a ground loop path problem. Perhaps enough DC voltage is swung across the sense circuit to latch the switch high.
[Link: imdb.com]
OP | Post 7 made on Friday May 31, 2002 at 20:56
build4u
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March 2002
84
Message to all,
You guys are great for the advice. I plan on trying a few thing this weekend when I get a chance. I am interested in the ground loop issue. My dealer has mentioned this to me as well. Are there any tests or fixes for this issue. I was told I should try to plug the power cord in usinf a ground-less adapter.

I'll post again after I have some time to try some of the thing above.

Again, thanks again to all.
Build4u
Post 8 made on Tuesday June 11, 2002 at 01:16
jack schultz
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August 2001
10
My bet is on the 1K pull down resistor. Lifting the AC power cord ground would be a very very bad (and potentially unsafe) approach.
Post 9 made on Tuesday June 11, 2002 at 01:42
kabster
Founding Member
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July 2001
1,606
30

[

85] _87a ]86

_87



A 12v single pull double throw relay.
Hook constant 12v (+) to 30
Hook constant 12v (-) to amp to be trigered
Hook triger ground 12v (-) to 85
Hook triger 12v (+) to 86
87a will be 12v (+) at rest
87 will be 12v (+) when trigered
Use isulated female spades on your relay connections.

John I'm sure you know this but this might help future readers.

You can use this for 12v triggered ANYTHING there are no limits drapes,screen,other triggers or whatever.


Hey you guys I think it's also a bad idea to lift the power plug ground it's there for a reason.


This message was edited by kabster on 06/12/02 14:52.07.
Post 10 made on Monday June 17, 2002 at 00:24
jefflv
No Longer Registered
Speaker Craft has had a problem with the sensitivity on there amps call Speaker Craft and they should send you a new amp.I have had this problem with my last shipment about a dozen units.


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