Home Theater Forum and Systems banner

61 - 79 of 79 Posts

·
Registered
Joined
·
56 Posts
Discussion Starter #62
Good to hear that you're impressed with the result, Gregg. I'd love to see some final pics of the room too, and keep us updated on your experiments with positioning. With 4 subs you (theoretically) have a lot of options, so I'll bet by the time you settle on something it will sound amazing.
I may have some room pics tonight, my buddy and son-in-law are coming by tonight to help me stack the subs.
I have some room re-arranging to do, I plan on building a rack in the wall for all my equipment and also install a 106 or 120 inch screen (Owen I have seen you in the projector forum, my next stop).

And Doug, I am very happy with my Statements, I still have to apply a finish on them, it will be the same as the subs. The Statements and the Mach 5 subs are a good combination. Having said that, the subs are only for movies, the Statements are incredible for 2 channel music.

Gregg
 

·
Registered
Joined
·
56 Posts
Discussion Starter #63
I am done, subs are in place and sound incredible, I am to old to play them loud.

I would like to thank Mark for the subs, Graham for the design and everybody who contributed and viewed the forum. I do not plan on building any speakers or subs for a while, it was fun. You will notice one of the Behringer amps on top of my original Polk Audio sub.

Gregg
 

Attachments

·
Registered
Joined
·
2 Posts
Gregg, wow. Those look great. I am not sure that people can really appreciate how much subwoofer is actually there without some frame of reference, such as that door. I have one sub of approx the same dimensions - the idea of 4 makes me giggle. It is interesting how one's perspective of 'well I will never need that much bass' changes, no, evolves is a better word, as time goes on. Again, excellent work.

Maybe I'll build one more, just one more....
 

·
Registered
Joined
·
3,068 Posts
Gregg,

Some REW graphs would be very interesting on those and maybe even a vid!!

The bass in your room is really going to be incredible that is for sure.

Also some latest pics too....


cheers

Graham
 

·
Registered
Joined
·
237 Posts
Re: Subwoofer Design Service

Are those as large as they look? When I first glanced at the photo, I thought that those were stacked washers and dryers. How large a listening room do you have?
 

·
Registered
Joined
·
56 Posts
Discussion Starter #68
Re: Subwoofer Design Service

Mike

They are as big as they look, my wife told me I was @#&% stupid when she seen the drivers, her mind has not changed but she does enjoy watching movies.

My room is 16ft wide by 28ft long and the ceiling is 12 ft high.

The subs sound as impressive as they look.

Gregg
 

·
Registered
Joined
·
3,068 Posts
I did the whole design for Gregg. Here you go. Now try and imagine 4 off these!

I reckon the way he has them stacked he'g gotta be looking at well over 120db at 15-20hz.

cheers

Graham
 

Attachments

·
Registered
Joined
·
180 Posts
Nice! How many decibels does adding an additional driver add? And is that if you put the same amount of power to it, also?
 

·
Registered
Joined
·
3,068 Posts
If the sub is stacked on top then adding a second sub should yield you a 6db increase although it could be less. So try and imagine with Gregg's as he has two identical subs stacked. I would love to see some sweeps of 1 sub then add the second followed by the third and fourth. Just to see the results.

How about it Gregg? Have you managed to run any sweeps yet?

My subs are co-located and I notice quite a big difference to my ear by adding the second sub and there is less need for EQ'ing as I get a much flatter response. The bass doesn't sound so located as it did with one sub.
 

·
Registered
Joined
·
487 Posts
I see. What happens if you run the same amount of power, but to two subs versus one? What is the gain then?
You get +3dB for double the power and + 3dB for double the swept area. Hence +6dB for two subs.
 

·
Registered
Joined
·
56 Posts
Discussion Starter #76
Graham

I have not done much other than listen to the subs, I have been very busy at work, I have worked every day since mid September. I hope to touch base with you mid Feb and maybe do some graphs.

Gregg
 

·
Registered
Joined
·
21 Posts
I look at those and think of the 80's?memorex commercial where the guy is sitting in front of the speakers and holding on to the chair.And just a thought for anyone building a large cabinet,measure the doors you have to bring them thru.a 32" cab won't go though a 30" doorway!
 

·
Registered
Joined
·
2 Posts
Hi on the behringer ep4000 what did you set your switch to on the back for sub duty as i have one but just cant figure out how they go weather they go to the left or right and and whitch one goes left and which ones go right. Any would be appreciated
 
61 - 79 of 79 Posts
Top