[Eric]

Have any of y'all tried any of the popular Sub equalizers (like the Velodyne SMS unit or the one from SVS made by Audyssey)? How do they work for 2-channel with stereo subs?

[Rob Babcock]

I hope someone can offer some input.  I've been drooler over the SVS model since it was first announced.  In the past I've used a Behringer BFD to good effect but the thing is very complicated to program.  Now I use a single band parametric that's completely automatic.  It works well but I imagine it's nothing compared to the Velodyne or SVS units.

[2gumby2]

I have the Velodyne SMS-1 and I am very happy with them. Highly recommended! You should use one per channel so you will need two for your stereo system. I downloaded the Outlaw SMS supplement to the SMS manual and it was a great help. I've heard good things about Rives Audio so you may want to check them out as well.

[Eric]

I have 2 full range speakers. So, if I dont want to cross them over, how would I hook the the SMS-1? My thought was to run directly to the mains and only run the subs through the SMS-1. Would that work?

[roscoeiii]

Why wouldn't you want to crossover your full range speakers at some point? Crossing over would give better integration with subs as well as freeing your full-rangers and their amplifier from the most demanding part of the spectrum. I wouldn't rule out a high pass filter of around 50-80Hz....

[ctviggen]

I have 2 full range speakers. So, if I dont want to cross them over, how would I hook the the SMS-1? My thought was to run directly to the mains and only run the subs through the SMS-1. Would that work?

That should work.  You'd have to split the signal somewhere, though.

[ctviggen]

Why wouldn't you want to crossover your full range speakers at some point? Crossing over would give better integration with subs as well as freeing your full-rangers and their amplifier from the most demanding part of the spectrum. I wouldn't rule out a high pass filter of around 50-80Hz....

It might free the full range speakers from having to produce the low frequencies, but some believe spreading the bass throughout the room in as many locations as possible is better and provides better -- not worse -- bass integration. 

[BobRex]

It might free the full range speakers from having to produce the low frequencies, but some believe spreading the bass throughout the room in as many locations as possible is better and provides better -- not worse -- bass integration.

True, but in the case of EQing the subs, the full rangers will end up mucking up the response.  You may find the response is even worse than pre-EQ.  Assuming that you can't separate the woofers from the fr box (bi-wire or bi-amp), then you will have greater success if you roll off the frs.

[roscoeiii]

And in Eric's case he is using dual subs already, I'd imagine those would spread the bass sufficiently.

[Eric]

Why wouldn't you want to crossover your full range speakers at some point? Crossing over would give better integration with subs as well as freeing your full-rangers and their amplifier from the most demanding part of the spectrum. I wouldn't rule out a high pass filter of around 50-80Hz....

My understanding ( and I could be wrong) is that the SMS-1 only has a single fixed high-pass crossover at 80hz. My Jags with powered LFM's do go lower than that cleanly. The LFM's probalbly cross over in the range from 100hz to 60hz gradually.

[Eric]

As I am looking at the SMS-1 and Ausyssey unitls I have some concerns. In looking at the options it appears that the biggest drawback to the SMS-1 is that it does not truly process stereo subs. It nulls them to one signal. Thus for true stereo bass you would need 2 units. The SVS AS-EQ1 does allow for stereo, but also has a 7.5 ms electrical latency which requires either placing your subs 8.4 feet closer to the listening position than the mains, or purchasing a digital cross-over to compensate for the delay. There does not seem to be a single straight-forward solution for DRC of the subs. I was hoping to see how folks have dealt with these issues.

[BobRex]

My understanding ( and I could be wrong) is that the SMS-1 only has a fixed  high-pass crossover at 80hz.

Well, yes and no.  As I understand it, the SMS-1 has a default high-pass at 80 Hz, but you can shift that freq. as well as defeat the xover. 

Now, I'm confused as to how you plan on using the subs.  At first you said you were going to run the "satellites" full range.  If that's the case, then you won't be using the SMS-1 xover.  Instead you will be running a second pre-out to the SMS-1 and running that out to just the sub amp's inputs.  Assuming your sub has a xover, you then use that to integrate the subs with the mains.

But your latest post makes it appear that you are going to rely on the SMS-1 to act as your crossover.
In that scenario the mains will only run from 80Hz up and are then not truly full range.   

Which way are you planning on using the subs and SMS -1?   BTW, the SMS-1 does have 2 eq'd outputs, but if you truly want to have stereo subs, you will need 2 SMS-1s.

[BobRex]

As I am looking at the SMS-1 and Ausyssey unitls I have some concerns. In looking at the options it appears that the biggest drawback to the SMS-1 is that it does not truly process stereo subs. It nulls them to one signal. Thus for true stereo bass you would need 2 units. The SVS AS-EQ1 does allow for stereo, but also has a 7.5 ms electrical latency which requires either placing your subs 8.4 feet closer to the listening position than the mains, or purchasing a digital cross-over to compensate for the delay. There does not seem to be a single straight-forward solution for DRC of the subs. I was hoping to see how folks have dealt with these issues.

You either use 2 SMS-1s or you buy the PARC.

[Eric]

I would like to use my mains full range. What is more than likely creating the confusion is that the ACI speakers I have sit on powered Low Frequency Modules that add some bass foundation. I have added 2 Rythmik subwoofers to augment that foundation. So, that is whay I would like to run the ACI speakers full range (in addition to the benefit of not passing my signal to the mains through additional processing and potentially messing with the higher frequencies by adding artifacts). My discussion of the crossovers between the speakers and the LFM's was addressing the modules the speakers come with. Not the additional Rythmik subs.

[zybar]

As I am looking at the SMS-1 and Ausyssey unitls I have some concerns. In looking at the options it appears that the biggest drawback to the SMS-1 is that it does not truly process stereo subs. It nulls them to one signal. Thus for true stereo bass you would need 2 units. The SVS AS-EQ1 does allow for stereo, but also has a 7.5 ms electrical latency which requires either placing your subs 8.4 feet closer to the listening position than the mains, or purchasing a digital cross-over to compensate for the delay. There does not seem to be a single straight-forward solution for DRC of the subs. I was hoping to see how folks have dealt with these issues.

I use 2 SMS-1 units in my HT and like what they do.  Using the Outlaw documentation, it is pretty simple and straightforward to use.

Can't comment on 2 channel.  I have only used the SMS-1 as a measuring device to help me fine tune the built in 11 band EQ in each speaker.   

George

[Eric]

I use 2 SMS-1 units in my HT and like what they do.  Using the Outlaw documentation, it is pretty simple and straightforward to use.

Can't comment on 2 channel.  I have only used the SMS-1 as a measuring device to help me fine tune the built in 11 band EQ in each speaker.   

George

George,

Do you run your mains through the sms-1 or just the subs?

[zybar]

George,

Do you run your mains through the sms-1 or just the subs?

Just the subs.  I also don't use the crossover on the Velodyne.

I go sub out on the HT receiver to the first SMS-1 and daisy chain to the second SMS-1.

George

[Eric]

I have been speaking to the guys at SVS. I think I can make that unit work