Behringer feedback destroyer question.. - Page 2

Enzo · 18th October 2005, 12:42 AM

Please don't call them "stereo" jacks unless they are used to carry two channels of signal information. You have confused the man. They are TRS jacks - tip, ring, sleeve - which are used as a balanced input. People often call them stereo jacks, but it is a poor use of the term. Each jack handles ONE channel of signal, but the tip and ring contacts on the thing allow for a balanced connection.

A stereo output such as for headphones can use a TRS jack, but all TRS jack applications are not stereo. This is a perfect example of why not to label them that way.

amplifierguru · 18th October 2005, 01:06 AM

Hi Enzo

Yes I appreciate what you're saying. I was simply trying to communicate in jargon that jonz could possibly relate to.

TRS, TRS,TRS... OK jonz?

Cheers,
greg

Dick West · 18th October 2005, 07:08 PM

Is it possible to convert a balanced TRS connection to an unbalanced phone jack connection?

jonz · 18th October 2005, 10:41 PM

Thanks Ampguru..I figgured it out thanks to you guys....I can't believe something so simple could have eluded me...

I split the signal from my H.T. receiver LFE pre-out with an rca 'Y" going to 1/4 mono to rca adapters to the inputs of the behringer and from there I use a pair of 1/4 mono's to my amplifier which already accepts xlr's/neutriks/ 1/4's..now the hard part of adjusting the filters on the eq......

dnsey · 19th October 2005, 07:04 AM

Quote:

Is it possible to convert a balanced TRS connection to an unbalanced phone jack connection?

Just use a standard 'mono' plug. The ring and sleeve connections will then be shorted, which is what you require.
Note that some cheap and oddball plugs aren't made to standard dimensions, so use something well-known and decent quality.

Dick West · 19th October 2005, 12:32 PM

dnsey,

Thanks for the clear assurance that conversion is simple.

Dick

Jonathan Bright · 22nd October 2005, 02:29 AM

I'm a little bit surprised that your using it with a sub. Most of the feedback is higher frequencies. We had one at a church I used to work in and it was quite good up to a point. As I understand it it will lock on to the particular frequency that is screeching away and then insert a notch filter. It can do this for a large number of frequencies. We only struck one problem with it. At regular intervals it would completely fail and the only explanation anyone came up with was that the local power company wass ending a signal down the mains AC to turn on domestic hot water systems and this was resetting the supressor. They were going to insert a filter in the mains to see if that cured it. I didn't hear whether it worked or not.

jonz · 22nd October 2005, 03:43 AM

Actually the parametric eq part of it is used to smooth out a sub 's response.. if you want to read more you can go here

Jonathan Bright · 22nd October 2005, 04:03 AM

Thanks jonz. That makes sense. I knew it was a flexible device. We only bought ours for the feedback problems. One of our daughters just moved to Canada recently and had a w/end in Montreal.........it sounded like a good plce. Cheers. Jonathan

22nd October 2005, 02:29 AM	#17
Jonathan Bright diyAudio Member Join Date: Feb 2004 Location: Queensland	I'm a little bit surprised that your using it with a sub. Most of the feedback is higher frequencies. We had one at a church I used to work in and it was quite good up to a point. As I understand it it will lock on to the particular frequency that is screeching away and then insert a notch filter. It can do this for a large number of frequencies. We only struck one problem with it. At regular intervals it would completely fail and the only explanation anyone came up with was that the local power company wass ending a signal down the mains AC to turn on domestic hot water systems and this was resetting the supressor. They were going to insert a filter in the mains to see if that cured it. I didn't hear whether it worked or not. __________________ "It was the Springtime of the year when aunt is calling to aunt like mastodons bellowing across primeval swamps." P.G. Wodehouse.

22nd October 2005, 04:03 AM	#19
Jonathan Bright diyAudio Member Join Date: Feb 2004 Location: Queensland	Thanks jonz. That makes sense. I knew it was a flexible device. We only bought ours for the feedback problems. One of our daughters just moved to Canada recently and had a w/end in Montreal.........it sounded like a good plce. Cheers. Jonathan __________________ "It was the Springtime of the year when aunt is calling to aunt like mastodons bellowing across primeval swamps." P.G. Wodehouse.

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18th October 2005, 12:42 AM	#11
Enzo diyAudio Member Join Date: Sep 2004 Location: Lansing, Michigan	Please don't call them "stereo" jacks unless they are used to carry two channels of signal information. You have confused the man. They are TRS jacks - tip, ring, sleeve - which are used as a balanced input. People often call them stereo jacks, but it is a poor use of the term. Each jack handles ONE channel of signal, but the tip and ring contacts on the thing allow for a balanced connection. A stereo output such as for headphones can use a TRS jack, but all TRS jack applications are not stereo. This is a perfect example of why not to label them that way.

18th October 2005, 01:06 AM	#12
amplifierguru Account Disabled Join Date: Aug 2004 Location: Earth	Hi Enzo Yes I appreciate what you're saying. I was simply trying to communicate in jargon that jonz could possibly relate to. TRS, TRS,TRS... OK jonz? Cheers, greg

18th October 2005, 07:08 PM	#13
Dick West diyAudio Member Join Date: Aug 2004 Location: Illinois	Is it possible to convert a balanced TRS connection to an unbalanced phone jack connection?

18th October 2005, 10:41 PM	#14
jonz diyAudio Member Join Date: Mar 2004 Location: Montreal	Thanks Ampguru..I figgured it out thanks to you guys....I can't believe something so simple could have eluded me... I split the signal from my H.T. receiver LFE pre-out with an rca 'Y" going to 1/4 mono to rca adapters to the inputs of the behringer and from there I use a pair of 1/4 mono's to my amplifier which already accepts xlr's/neutriks/ 1/4's..now the hard part of adjusting the filters on the eq......

19th October 2005, 12:32 PM	#16
Dick West diyAudio Member Join Date: Aug 2004 Location: Illinois	dnsey, Thanks for the clear assurance that conversion is simple. Dick

22nd October 2005, 03:43 AM	#18
jonz diyAudio Member Join Date: Mar 2004 Location: Montreal	Actually the parametric eq part of it is used to smooth out a sub 's response.. if you want to read more you can go here