sub wiring question

Use the speaker level inputs, it lets the flavor of your main amp come through the subs amps and blend better with your main speakers.

speaker level input has lelf and right so which one should i connect, because im using two subs , do i need to use biwire or just single wire

A few quick further notes:

I used a pair of SPLR 8 subs (recently replaced) in my 14'x23'x17'high room. IME, if you want flat, extended bass response, the internal EQ in the SPLRs won't get you there. I had 3 significant suckouts below 100hz which couldn't be addressed as well as audibly diminished SPLs below 40 or 45 hz.

Replacing the 8" Velodynes with 12" subs reduced the need for EQ dramatically. However, the SMS was still tremendously valuable in determining the best location for the new subs.

Kal has much more experience with these devices than I do, so I'd believe him when he says that you can do better than the SMS-1. However, since my experience in 2 channel room analysis + bass EQ is limited to this device, I can offer no comparative assessment - other than to no room analysis + bass EQ at all. I can tell you - pretty much unequivocally - that the SMS is MUCH BETTER than no room analysis + bass EQ at all.

The SMS allowed essentially ruler flat response to 25hz with the SPLR 8s.

Marty

PS Replacing the subs didn't substantially change the on-axis, in-room response, but it did significantly change the sound of the system. I mention this because I don't want to overstate the impact of room analysis + bass EQ. Clearly, there's more to it than merely flat response. However, flat response (from either set of subs) was - IMHO - vastly superior to the alternative.

i have readed the SMS1 manual last night and i thoght it is hard to use but i try to read more and more , im using bookshelf apair Jm lab micro be , im happy with the sound but after i have readed the REL manual , they say it is better to use with SPEAKER INPUT , but mine are VOLODYNE , so any different between VOLODYNE sub and REL sub? the VOLODYNE manual does not recommend which input is better , so please advise which way the best without affecting the performance of the amplifier

Duypham,

The SMS is tricky to use - no doubt about that. Once you figure it out, it's great.

REL uses a very different approach than Velodyne. The whole "speaker level input" idea is closely associated with REL. I don't like this approach, but many others prefer it. I can give you many reasons why my preferred approach is "better", but in the end everyone must choose the approach that produces sound they like.

Chocolate ice cream or vanilla?

Marty