Subwoofer slam vs boom


Generally speaking what causes a subwoofer to be boomy, verses crisp and "slammy"?

Does placement and room acoustics greatly affect this, or is this just a common problem with lower end subs?

Currently I am using 2 HSU VTF-3's with opposite front corner placement, with all speakers set to large. The processor supports stereo subs, kinda a moot point with all large speakers thou. The subs should be doing the least amount of work possible, i.e. I am not rolling over 7 channels into one sub.

Thanks all
Marty
marty9876

Showing 5 responses by marty9876

I think the room I am working in is screwing things up, alot. Next I guess I will rotate the whole mess 90 degress. See what happens.

Wrong state of mind, given. I do not use subs for music either, just with HT I want a system to grab me by the balls and wip me aroung the room. It's not that is sounds bad, I just don't know what it could sound like. I want the 2x4 whacking feeling.

I need help...:)

Thanks
Marty
I thought I was cheating by using all large speakers. In hind site for a ht setup this might not be true.

What is in the .1 track? I wonder if some frequencies are not being duplicated in both the mains and subs. What I have tried to do is let each piece of equipment do its own job, and not over load one piece.

I tried the subs out in the room, still not slamming. the subs are set about +2 db over the rest. This is not too high, I hope.

Before I got deeply into this hobby, I was at a friends house, listening to his rig. I have no idea what he had for equipment, since moved away and can not ask, but he played a demo disc and WOW. Some guy coughed and it felt like someone whacked me in the chest with a 2X4.

This crisp slam is what I am after.

Thanks all

Marty
Thanks for the help all, just pack to tinkering I reckon...

The processor has stereo sub outs, with the usual large/small speaker sizes and bass redirect and roll off. Cross points are 50,65,80,90 and so on up. The processor can be switched from one to two subs, or none.

The amp and subs share a 30amp dedicated line, with the source equipment on a 20amp dedicated line. Current "should" not be a problem, I have 200amp service to the house(renting, guess I should have asked before I installed the lines...) with an old Push-Matic circuit breaker box. New breakers for the lines.

I still am confused about the speaker settings, to me if a speaker is large, so flat to 40hz, and you set it as a large, does this speaker play stuff at 40hz, with the subs playing the same thing at 40hz? Back to what is in the .1 track.. Does this track contain the same information as in the front mains? My guess is yes, so their is no reason to have "large" speakers.

I really love the idea of the Outlaw ICBM, with the ability to tweak each speaker. I just having a hard time sticking a $250 piece of gear smack in the middle of $20k worth of electronics. The cables would all have to be unbalanced, ect. On the other hand, for $250 bucks, this is a drop in the bucket compared to the rest.

The current room does have an open corner. Stereo subs are impossible to "localize", blend in very well. Sounds silly, but it is hard to hear one sub when you have two.

Thanks
Marty
... I thought I would get kicked out of here for saying the C word(Vega's). Those were my first speakers years ago, sounds funny saying that I am 26. I still have them, the DX-9's. I tried to use these as passive subs, disconnecting the tweeters and mids, running the .1 channel straight to the subs via a Bryston 9B amp. Just did not like the result, the HSU-2 I have sounded way better. The Vegas just sounded like someone put a metal garbage can over my head and was beating on it with a rubber hammer.

I was thinking of bypassing the HSU-3's amps and running the signals through a channel on my Simaudio Titan amp(7ch). Anyone know if this idea would be worth a try? I am wondering if the Sim might have better control over the HSU drivers. No the best solution, drawing the juice out of the Sim might not be the best idea, but this thing is so dang big, I don't think it could ever run out of power.

Thanks
Marty