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Buttkicker LFE: connect to Processor's Sub Out or Subwoofer's Out?

post #1 of 8
Thread Starter 
I've just ordered a Buttkicker LFE kit, and was wondering if there's any difference in quality or response depending on how it's hooked up.

It sounds like you can either hook it up either to your surround processor's Sub Out, or alternatively use the Output on your subwoofer itself.

I have an Anthem Statement d2v which has a choice between a line-level Sub 2 out, or a balanced Sub 2 out. I have my subwoofer already connected to the Sub 1 out.

For the subwoofer I have a Velodyne DD-15 which also has both a line level Output that "incorporates the use of an 80Hz 6dB/octave slope high pass crossover", as well as a "Thru" line-level connector "for sharing the same signal that goes into your subwoofer with a second 'daisy-chained' subwoofer." Not sure which would be more beneficial for the Buttkicker if I connected it to the sub.

Will it make any difference which output the Buttkicker is connected to, or would they be exactly the same? Or would there be an advantage to hooking it up to the processor so that I could perhaps change the crossover frequency on Sub 2, whereas if it's hooked up to the Velodyne it will just inherit and repeat whatever the subwoofer is set to? And if it's better to hook it up to the sub, would the Output or Thru connector be preferred?

Thanks,
Robert
post #2 of 8
check out the "comparison of two transducers" thread...

criagjohn covered this very topic...a good read
post #3 of 8
Thread Starter 
Hi lefthandluke, I had read through that read and didn't see anything specifically relating to the best source for the Buttkickers. I did see a post from craig john that linked to his own theater setup, and he noted he hooked is transducers up directly to his OPPO Blu-ray player.

Unfortunately I don't have that as one of my options, since I use an HTPC for movie playback instead of a traditional Blu-ray player.

So my choices for connecting the Buttkicker are:

• Anthem d2v Sub 2 out
• Velodyne DD-15 Output
• Velodyne DD-15 Thru

The Anthem system does use a room correction algorithm similar to the Audyssey system called ARC, so it sounds like the Buttkicker will be inheriting that room correction almost regardless of whether I hook it up to the processor or the subwoofer.

Thanks,
R
post #4 of 8
Quote:
Originally Posted by rsinclair View Post

Hi lefthandluke, I had read through that read and didn't see anything specifically relating to the best source for the Buttkickers. I did see a post from craig john that linked to his own theater setup, and he noted he hooked is transducers up directly to his OPPO Blu-ray player.
Unfortunately I don't have that as one of my options, since I use an HTPC for movie playback instead of a traditional Blu-ray player.
So my choices for connecting the Buttkicker are:
• Anthem d2v Sub 2 out
• Velodyne DD-15 Output
• Velodyne DD-15 Thru
The Anthem system does use a room correction algorithm similar to the Audyssey system called ARC, so it sounds like the Buttkicker will be inheriting that room correction almost regardless of whether I hook it up to the processor or the subwoofer.
Thanks,
R
You could forego the ARC and use the DD subs' internal EQ system instead. Then, if you hook the Buttkicker to the Anthem Sub2 output, it won't have the ARC on it.

Craig
post #5 of 8
Thread Starter 
I don't think I'd want to completely disable the benefits of the ARC room correction for all my speakers just to be able to send a purer signal to the Buttkicker.

I guess once I have the system installed I'll see how it does with ARC enabled, and decide whether I need to look into options for giving it a non-corrected signal. I would imagine that with a device like an LFE transducer, a room correction algorithm probably shouldn't make a whole heck of a lot of difference. I may be demonstrating my ignorance here, but doesn't the transducer essentially just need to know when it should kick in? If so, accepting that information from a processed source like ARC shouldn't really affect its performance, and certainly not any more than it's affecting the subwoofer itself, which engages and performs just fine with ARC.

-R
post #6 of 8
Quote:
Originally Posted by rsinclair View Post

I don't think I'd want to completely disable the benefits of the ARC room correction for all my speakers just to be able to send a purer signal to the Buttkicker.
I guess once I have the system installed I'll see how it does with ARC enabled, and decide whether I need to look into options for giving it a non-corrected signal. I would imagine that with a device like an LFE transducer, a room correction algorithm probably shouldn't make a whole heck of a lot of difference. I may be demonstrating my ignorance here, but doesn't the transducer essentially just need to know when it should kick in? If so, accepting that information from a processed source like ARC shouldn't really affect its performance, and certainly not any more than it's affecting the subwoofer itself, which engages and performs just fine with ARC.
-R
ARC or Audyssey or any other equalization program changes the frequency response of the signal sent to each speaker and the subwoofer. It either cuts or boosts certain frequencies in a effort to undo the frequency response anomalies introduced by the room. So, how much it's doing to the subwoofer signal depends entirely on how good the frequency response of the sub is in your room.

Another alternative you could try is to run the EQ program in your DD subs *before* you run ARC. If you flatten the response considerably, ARC won't have a lot to do, and it won't provide as much correction to the subwoofer. However, ARC uses multi-point measurement and correction and the system in the DD subs only uses single point correction, so what you do with the DD software, won't completely eliminate what ARC does.

Craig
post #7 of 8
Thread Starter 
Thanks Craig. Regarding the original question, do you know if it's preferred to attach the Buttkicker to the Processor's Sub Out, or to the Subwoofer's Out (or Thru)? Or would there be no noticeable difference?

Cheers,
Robert
post #8 of 8
Quote:
Originally Posted by rsinclair View Post

Thanks Craig. Regarding the original question, do you know if it's preferred to attach the Buttkicker to the Processor's Sub Out, or to the Subwoofer's Out (or Thru)? Or would there be no noticeable difference?
Cheers,
Robert
Just in terms of signal routing, you'll get a signal from either connection. The concern is what has been done to that signal prior to the connection. If you don't care about that, then either connection will "work,." The gain control of the shaker's amp will be the tool you'll use to set it's gain, (although both will be subject to the Master Volume Control of the receiver.) Depending on what amp you use, you may be able to set an LPF, an HPF and possibly some delay. However, there won't be anything you can do to "undo" what was done by ARC and/or the DD software.

It's only if you care about the what is done to the signal that you need to be concerned about the connection, (and, in my experience, you should be concerned about it.) I explained above how to avoid or minimize massive signal changes from the ARC or the DD software. And when I say massive, I mean massive. It's not uncommon for a subwoofer/room to have 20+ dB peaks and nulls. If your room has one or more of those, and your EQ(s) correct it, that correction will be applied to the shaker's signal also. It won't be anywhere close to the original signal.

Craig
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