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#279156 - 2018-09-24 01:41 Re: 861 - Help needed to set Subwoofer Level [Re: Filipe]
Registered: 2012-10-22
Posts: 749
Albert Offline
Paranoid android
Albert Offline
Paranoid android

Registered: 2012-10-22
Posts: 749
Loc: Shanghai, China
Before trying you could set a very low level using the sub volume control.


HT: Audiocom Oppo203 signature with Vanity HD/HD621 861v8, DSP7200SEup DSP5200SEVCup, DSP5200SE
Revel sub30*2 AntimodeX4 JVCx790
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#279214 - 2018-09-27 13:31 Re: 861 - Help needed to set Subwoofer Level [Re: Albert]
Registered: 2017-11-17
Posts: 42
Filipe Offline
Mostly harmless
Filipe Offline
Mostly harmless

Registered: 2017-11-17
Posts: 42
Loc: Porto, Portugal
Hi,

I am getting a new plate amp for the sub (the 3rd !!) so I must be careful next time I plug it in.
They will NOT replace the plate amp again, so ... extra careful next time.

I will replace the RCA cable... but really... what can the cable be doing? Leakage from ground to signal?
A RCA shorted from Ground to Signal would only cause the sub to go quiet... not burn anything right? So cable can't do anything to burn the input!?

I am more suspicious of ground leakages when turning off the 861.
I don't know what else I can do, to test the RCA out on the 861 for the SUB, unless I plug it in another subwoofer or amp.
I will try that, on a cheaper amp and cheaper speakers. Maybe I will get something... maybe not.

Next time my plate amp comes in, I will plug it in to POWER only... then plug a smartphone to RCA in... and let it play.
If nothing happens, then I will connect it the 861. Hope I don't burn it again.

Cheers


861v4/ID40, HD621, Aspen Amplifier Mayas, SF Amati + SF ElipsaAuditor + Proac RDM, Roon on PC, Kodi on Chromebox (with Libreelec).
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#279215 - 2018-09-27 13:33 Re: 861 - Help needed to set Subwoofer Level [Re: Filipe]
Registered: 2007-09-23
Posts: 1,683
Syles Offline
Knows where his towel is
Syles Offline
Knows where his towel is

Registered: 2007-09-23
Posts: 1,683
Loc: London, UK
I’d still get a transformer coupler to be safe.

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#279257 - 2018-10-01 10:33 Re: 861 - Help needed to set Subwoofer Level [Re: Syles]
Registered: 2017-11-17
Posts: 42
Filipe Offline
Mostly harmless
Filipe Offline
Mostly harmless

Registered: 2017-11-17
Posts: 42
Loc: Porto, Portugal
Can you specify recommendations ? I dont quite get what you are talking about transformer coupler?


861v4/ID40, HD621, Aspen Amplifier Mayas, SF Amati + SF ElipsaAuditor + Proac RDM, Roon on PC, Kodi on Chromebox (with Libreelec).
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#279259 - 2018-10-01 10:56 Re: 861 - Help needed to set Subwoofer Level [Re: Filipe]
Registered: 2007-09-23
Posts: 1,683
Syles Offline
Knows where his towel is
Syles Offline
Knows where his towel is

Registered: 2007-09-23
Posts: 1,683
Loc: London, UK
Something like the Rane Balance Buddy B22 Link

Or the Neutrik NA2M-D0B-TX Link

This will remove any earth loops, you'll need an XLR cable from it to your Subwoofer.

All the best,
Steve

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#279262 - 2018-10-01 11:30 Re: 861 - Help needed to set Subwoofer Level [Re: Syles]
Registered: 2017-11-17
Posts: 42
Filipe Offline
Mostly harmless
Filipe Offline
Mostly harmless

Registered: 2017-11-17
Posts: 42
Loc: Porto, Portugal
I see what you mean, but I can't use XLR connections. My 861 only has RCA analog out.

I found the Jensen SUB-1RR but it is very expensive...


861v4/ID40, HD621, Aspen Amplifier Mayas, SF Amati + SF ElipsaAuditor + Proac RDM, Roon on PC, Kodi on Chromebox (with Libreelec).
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#279263 - 2018-10-01 11:33 Re: 861 - Help needed to set Subwoofer Level [Re: Filipe]
Registered: 2007-09-23
Posts: 1,683
Syles Offline
Knows where his towel is
Syles Offline
Knows where his towel is

Registered: 2007-09-23
Posts: 1,683
Loc: London, UK
Originally Posted By Filipe
I see what you mean, but I can't use XLR connections. My 861 only has RCA analog out
You'd take the RCA from the 861 into the transformer unit, then XLR from the unit to the Subwoofer, the SVSPB16 has XLR inputs.

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#279264 - 2018-10-01 11:37 Re: 861 - Help needed to set Subwoofer Level [Re: Syles]
Registered: 2017-11-17
Posts: 42
Filipe Offline
Mostly harmless
Filipe Offline
Mostly harmless

Registered: 2017-11-17
Posts: 42
Loc: Porto, Portugal
Of course. PLain stupidity. Thank you.
I found this for 35€ in Mouser... it may be worth it.
TY
Cheers


861v4/ID40, HD621, Aspen Amplifier Mayas, SF Amati + SF ElipsaAuditor + Proac RDM, Roon on PC, Kodi on Chromebox (with Libreelec).
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#279266 - 2018-10-01 11:50 Re: 861 - Help needed to set Subwoofer Level [Re: Filipe]
Registered: 2007-09-23
Posts: 1,683
Syles Offline
Knows where his towel is
Syles Offline
Knows where his towel is

Registered: 2007-09-23
Posts: 1,683
Loc: London, UK

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#279268 - 2018-10-01 13:09 Re: 861 - Help needed to set Subwoofer Level [Re: Syles]
Registered: 2017-11-17
Posts: 42
Filipe Offline
Mostly harmless
Filipe Offline
Mostly harmless

Registered: 2017-11-17
Posts: 42
Loc: Porto, Portugal
Sure it works both ways ? They all say it works XLR >> RCA


861v4/ID40, HD621, Aspen Amplifier Mayas, SF Amati + SF ElipsaAuditor + Proac RDM, Roon on PC, Kodi on Chromebox (with Libreelec).
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#279269 - 2018-10-01 13:14 Re: 861 - Help needed to set Subwoofer Level [Re: Filipe]
Registered: 2007-09-23
Posts: 1,683
Syles Offline
Knows where his towel is
Syles Offline
Knows where his towel is

Registered: 2007-09-23
Posts: 1,683
Loc: London, UK
It will work both ways, See this drawing for details, it has the circuit diagram; it's a 1:1 transformer.

The one I chose is meant to go from RCA to XLR as it has a Male XLR (they make female ones too).

All the best,

Steve

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#279273 - 2018-10-01 14:47 Re: 861 - Help needed to set Subwoofer Level [Re: Syles]
Registered: 2017-11-17
Posts: 42
Filipe Offline
Mostly harmless
Filipe Offline
Mostly harmless

Registered: 2017-11-17
Posts: 42
Loc: Porto, Portugal
Thank you. Parts ordered plus a small XLR cable.
Will report on findings later on, hopefully with good results.


861v4/ID40, HD621, Aspen Amplifier Mayas, SF Amati + SF ElipsaAuditor + Proac RDM, Roon on PC, Kodi on Chromebox (with Libreelec).
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