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subwoofer inputs


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4 replies to this topic

#1 of 5 OFFLINE   DerekCV

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Posted March 08 2007 - 08:26 AM

Simple question: My recieve has a "sub out" connection and my new sub have a left and a right channel signal input. Do I need to get a Y-spliter to connect both inputs or can i just use 1 input safely? Thanks Derek

#2 of 5 OFFLINE   Robert_J

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Posted March 08 2007 - 08:51 AM

The inputs on sub amps are mono. So you can connect your sub cable to either input. Some may say that you need a "Y" but that is just a waste of money. -Robert

#3 of 5 OFFLINE   John Garcia

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Posted March 08 2007 - 10:31 AM

It isn't a waste of money if your sub needs to have a certain amount of input voltage. Certain sub amps have a high input voltage requirement and different receivers have different output levels so a single input may not be enough to keep it from shutting off during a quiet passage, and in such circumstances a Y will usually solve the problem. This is not the case with all subs though. A Y splitter is a few bucks, so it really doesn't hurt anything to use one.
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#4 of 5 OFFLINE   Robert_J

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Posted March 09 2007 - 02:52 AM

Then turn up the sub level at the receiver and turn down the level at the sub to compensate. Adding a Y just divides the signal into two different cables and is then combined into one again inside the plate amp of the sub. I have half a dozen different plate amps sitting around that all have the inputs combined. -Robert

#5 of 5 OFFLINE   John Garcia

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Posted March 09 2007 - 04:49 AM

All sub amps sum to mono, period, and if using a sub pre-out from the receiver, the signal sent is already mono. That isn't the point. The point was, how much input voltage the sub actually sees from the receiver, and using a Y is the same as using two separate feeds - the sub will actually see almost 2x the VOLTAGE regardless of it being summed back, and some subs NEED that due to expecting a higher input voltage. BTW, this is the info that was given by HSU to a customer having an issue with one of their subs staying on right in their forums.
HT: Emotiva UMC-200, Emotiva XPA-3, Carnegie Acoustics CSB-1s + CSC-1, GR Research A/V-1s, Epik Empire, Oppo BDP-105, PS4, PS3,URC R-50, APC-H10, Panamax 5100 Bluejeans Cable
System Two: Marantz PM7200, Pioneer FS52s, Panasonic BD79
(stolen) : Marantz SR-8300, GR Research A/V-2s, Sony SCD-222ES SACD, Panasonic BD-65, PS3 60G (250G)

Everybody is a genius, but if you judge a fish by its ability to climb a tree, it’ll spend its whole life believing that it is stupid.” – Albert Einstein

 





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