Subwoofer Cable vs RCA for Interconnects ???

[Flash]

A small Query,

I need to run extremely long interconnects from Preamp to Power Amp.
Each cable would run approx 30 feet and I have to use 4 cables in total.
My amps dont have XLR connections so stuck with RCA

My initial plan was to to use standard RCA.
However due to the long interconnect length. I have a feeling it would pick up noise / interference / ground loop etc
From what I know Subwoofer cables are better shielded.
Can i use subwoofer cables instead and terminate them at both the ends using RCA plugs ?

Is there any essential differences between RCA and Sub cable ?
Will running cables over such long length cause any signal degradation ?

Inputs would be highly appreciated

 

[Flash]

- Bump -

Any inputs my hombres ?

 

[venkatcr]

Why would you keep the pre- and power so far away? The signal from the pre is essentially weak, and such lengths would be detrimental to the signal travelling safely. I have never heard of using more that 2 or 3 meters for connecting a pre to a power. It would make more sense to see if you can house the two closer.

You can order for custom length cables from companies such as Blue Jean Cables.

Cheers

 

[Flash]

Why would you keep the pre- and power so far away? The signal from the pre is essentially weak, and such lengths would be detrimental to the signal travelling safely. I have never heard of using more that 2 or 3 meters for connecting a pre to a power. It would make more sense to see if you can house the two closer.

You can order for custom length cables from companies such as Blue Jean Cables.

Cheers

Well actually this is how it is

Preamp preouts to Line in on Subwoofer L+R
Line out of Subwofer to Poweramps which in turn is connected to speakers
(the sub has a filtered line out, filters out anything below 80hz and sends only 80hz and above to the Speakers.

 

[anm]

I think sub cables are supposed to be shielded.

 

[venkatcr]

Preamp preouts to Line in on Subwoofer L+R
Line out of Subwofer to Poweramps which in turn is connected to speakers
(the sub has a filtered line out, filters out anything below 80hz and sends only 80hz and above to the Speakers.

Why would you want to do this? If you pre- has a sub out just connect them to the pre amp. If you pre- has just one sub out, use a Y connection, and send it to both subs.

Connect the pre to the power and then to the speakers.

Cheers

 

[captrajesh]

I guess your sub has two 'line ins' to take left & right channel info. If your pre has two 'line outs' connect one pair of the line outs to sub's L&R & 2nd pair to the power amp. If pre has only one pair of line outs, do as Venkat says; though I'm not sure if 'Y' connectors can be used, you can go ahead & do it confidently as the suggestion is coming from FM like Venkat.

 

[spirovious]

Why would you want to do this? If you pre- has a sub out just connect them to the pre amp. If you pre- has just one sub out, use a Y connection, and send it to both subs.

Connect the pre to the power and then to the speakers.

Cheers

I think,its preamp & may not be having subwoofer out.So he needs to connect stereo out of preamp to sub stereo line in & SW will handle lows & send rest to power amp via line level out.

@Flash-If your preamp has extra preout,then you can connect them directly to the SW.

 

[dillihifi]

The only problem in this solution is that the signal below the 80Hz will also get sent to the sub and the main front speakers also. A nice option would be to separate the signal at a signal level like using an Active XO.

 

[Thad E Ginathom]

What do people think is the longest run for an unbalanced interconnect? Given obvious precautions like not running it in a conduit full of mains cables, of course.

I'd feel uncomfortable about thirty feet of unbalanced cable. I have a 15-foot pair which used to connect my sound-card to my amplifier, and I was very happy with the combination. There was a 15-foot toslink too!

The proof of the pudding is in the eating

 

[Flash]

Why would you want to do this? If you pre- has a sub out just connect them to the pre amp. If you pre- has just one sub out, use a Y connection, and send it to both subs.

Connect the pre to the power and then to the speakers.


Cheers

Well the pre does not have a sub out. If it had, It would have solved all my problems.

 

[Flash]

I guess your sub has two 'line ins' to take left & right channel info. If your pre has two 'line outs' connect one pair of the line outs to sub's L&R & 2nd pair to the power amp. If pre has only one pair of line outs, do as Venkat says; though I'm not sure if 'Y' connectors can be used, you can go ahead & do it confidently as the suggestion is coming from FM like Venkat.

I think,its preamp & may not be having subwoofer out.So he needs to connect stereo out of preamp to sub stereo line in & SW will handle lows & send rest to power amp via line level out.

@Flash-If your preamp has extra preout,then you can connect them directly to the SW.

Yes captain & Spiro the preamp does have line outs . However using this option I would have no bass management, As in I want to free up the fronts by sending them 80hz and above thus in turn freeing them of the load of producing difficult power hungry frequencies

The only problem in this solution is that the signal below the 80Hz will also get sent to the sub and the main front speakers also. A nice option would be to separate the signal at a signal level like using an Active XO.

You are spot on.
I am looking at the Active XO option. But the good ones seems to be priced at 30k and above. Not too happy about spending this much on a active crossover.

 

[captrajesh]

Yes captain & Spiro the preamp does have line outs . However using this option I would have no bass management, As in I want to free up the fronts by sending them 80hz and above thus in turn freeing them of the load of producing difficult power hungry frequencies

I thought any sub would have a various low pass filter using which, you need to dial in the sub. That would be relatively simpler & easy. If u want to send specific frequencies to speakers & the sub, you would definitely need an active xover and that is a complicated business & a lot of hardwork.

BTW What speakers & amp do u have?

 

[captrajesh]

I thought any sub would have a various low pass filter using which, you need to dial in the sub. That would be relatively simpler & easy. If u want to send specific frequencies to speakers & the sub, you would definitely need an active xover and that is a complicated business & a lot of hard work.

BTW What speakers & amp do u have?

Oops, I meant variable low pass filter.

 

[Flash]

Here is the Subwoofer plate amp pic from Rythmik Audio. I've highlighted the terminals

The Line out is filtered at 80hz . However it has a parametric EQ so I will be able to fine tune integration.

So without a sub out from the preamp. I would have to run cables from preouts of preamp to Line in on Sub and in turn line out to Poweramps which will filter 80hz and below from going to to the speakers
However the best place for the sub is approx 20 feet away however the RCA's would run 30 feet each cable.
So not too sure if there is another way out. Or rather will I be able to use well shielded RCA's and run it through a conduit away from power cables to avoid ground loops.
Would there be any signal loss ?



I am using Arcam as the Preamp and Rotel bridged monoblock Power amps and mated to the B&W 685 bookshelves. Will be used purely for stereo.
My HT rig will be connected to the same sub however will have different speakers (floorstanders Wharf 9.6) and AVR. So will have Bass management from AVR for HT. so not really bothered about that aspect

 

[Santy]

Is it not possible to move the source, pre and power close to the sub and have speaker cables as long as required. This is much better than having a long run of line level signal. Also a good quality speaker cable would cost lesser per metre than a good quality ic.


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[Flash]

Is it not possible to move the source, pre and power close to the sub and have speaker cables as long as required. This is much better than having a long run of line level signal. Also a good quality speaker cable would cost lesser per metre than a good quality ic.


Sent from my GT-I9001 using Tapatalk

Santy.

The sub that I have stands over 2 feet tall x 2 feet deep x 1.5 feet wide.
After a lot of discussions with the Home Minister.
She has put her foot down and does not want it to be the focal point in the living room next to the Rack.
So i am left with no option. but to move the sub to a corner near my Sofa. She has agreed to give up her Coffee side table.

So as it stands now. I have 2 options has conveyed by the Ministry of Internal Affairs

Option 1
1. Sub in a discrete area of the living room so that it does not stand out like a sore thumb spoiling the decor

Option 2
2. No Sub

 

[Santy]

If 5 years are over, changing the Home Minister is also an option!

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[manniraj]

If 5 years are over, changing the Home Minister is also an option!

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Hi Santy

Did you try this option? :lol:
Please post the results, I might also try after an year or so..:clapping:

 

[Flash]

If 5 years are over, changing the Home Minister is also an option!

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hyeah:hyeah:hyeah:hyeah: