Axiom Home Page Forums General Discussion Home Theater Another Freakin' Sub Post....

Hey Tom!
Yes, actually I called Axiom yesterday and talked to Brent. He recommended the 500 for the infamous "hit you in the chest feeling" and that I check the bolts in the subs' driver regarding what I was hearing as port noise. He felt that if tightening the bolts on the driver didn't help, I should call back and speak to someone in the service department... It didn't work, BTW.

I really have wondered about Bass Shakers and such. Maybe in the end, it'll be my only option. Of course then, "in the end" is the only way I'll experience bass.

In reply to:

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talked to Brent

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No way I disagree about the 500!

Looking at the specs of the 350 it should give you some of that " in the chest " feeling you're looking for.Are you certain that the sub is working correctly.My VTF 2 is rated down to 25hz and can thump the chest pretty good.I am a bit suprised you are not getting this with your 350.

Anechoic Resp. +/- 3dB 28 - 150
Room Resp. + 3dB/- 9dB 18 - 150
Max SPL Anechoic 107 dB
Max SPL In Room 118 dB

Hi Rick:
No, I'm not actually sure that the sub is working correctly as I was told I definitely should not be hearing the noise that I'm hearing (it's not subtle) but my gut feeling is that the big problem is still the room.

The room might be a bit problematic but if the sub is not working correctly all the graph plotting in the world isn't going to do much good.It sounds like your 350 is not in properly working order imo.

Mark, I figured you had consulted the experts. I did not mean to offend. Just trying to help by sending you towards someone who has the science to actually analyze the situation.

Perhaps you could test your subwoofer in another room, or even outside on a Finnish basketball court or something. Just to see if you can confirm your suspicions about either the sub or the room. I am always impressed by the analysis provided by you, JohnK and Bridgman about the room nodes, and I can be convinced that your small, square room is the culprit.

I still like either knocking out a wall or trying that IB thing. Or maybe constructing a special Home Theatre Shirt with some bass-shakers on the chest area. Perhaps one of those portable defibrillators plugged into the LFE port?

How much is return shipping on a EP500?

Tom:
Absolutely no offense taken whatsoever!

Actually, the idea of taking the sub into another room is a good one! I have four stereo setups in the house right now; three are in small, squarish rooms as well but not long ago I set up some old Design Acoustics satellites and Cambridge Soundworks passive subs with a receiver, CD player and XM Roady in my studio which is approximately 14' X 30'. It's very "open" and has bare walls and hardwood floors. It will be very interesting to see how differently the sub responds in a vastly different room!

Good Idea! (Not to mention if I buy a 500, that's where the 350 could likely end up anyway!!)

Well, there you go! After listening to some sub-relevant reference tunes, take the sub to the studio! And if you can get meaningfully better bass response in the studio (especially with so much more air in the room), we'll know that your existing viewing area is the Bermuda Triangle of Bass. And that you have to rearrange your whole house.

Finishing off the attic might be my only shot at getting a decent room.

Of course, I've bugged Bridgeman so much with this topic up to this point, I don't dare ask him for tips on getting good audio under a high roof peak!

The new house should be ready for occupancy and the financing finished in about two weeks, so in two weeks I expect to be submitting the "dial up-friendly Second Cousin Of All Posts" on the subject of room acoustics under a high roof peak. The new HT area is a 23x25 loft, under a 12/12 roof finished in drywall, so I expect to get about the same acoustics Mark would get if his room were also 13 feet high in addition to being 13 feet wide and 13 feet deep ;(