Connection for my sub... (1 Viewer)

[Steve Carlo]

Can someone clear up how I make this connection please?

My Marantz 7200 has a single RCA/phono output for the sub woofer (it is a non-amplified chanel). The sub (Velodyne 8") has *2* RCA/phono inputs (labelled L&R) and a set of regular speaker connections (which I cannot use in this instance)

Can I run a co-ax with an RCA/phono on one end (for the amp) to either the left or right channels (not both) OR do I have to split the signal at the speaker. In which case can I just use a Y splitter from Radio Shack? I remember reading somewhere that the volume could be doubled with a splitter. Is that necessary as the sub is powered?

Thanks!

 

[JustinG]

Nope, just connect to the Left rca connection. That is the mono channel and will work fine. Look to see if "mono" appears next to the Left rca input.

Also, you can either run a single rca cable or the coax option you posted above to the sub.

 

[John Garcia]

Split the signal at the sub (if you look around for subwoofer interconnects, you will find that many include a Y) You will gain a bit in input voltage at the sub, which will give you a bit more flexibility in tuning. You will be able to use less gain on the sub, meaning a bit more headroom. This is not "doubling" of volume, because in a properly calibrated system, you will end up with the same SPL levels.

There is no reason why you cannot use the speaker level inputs, though in this case, it would not be the best choice anyway.

 

[Steve Carlo]

You're right, I guess I could you both strands of the speaker wire with RCA plugs on both ends. But I have some coax spare which will do the job nicely. Someone a while ago suggested that the sub line would be better shielded as it has lower level signals going to it than the other speakers.

Thanks!

 

[JustinG]

Ahh I missed that he had 2 subs outs.

 

[John Garcia]

Coax wire will work fine as a sub cable. You can get RCA connectors for coax cable from Radio Shack.