604 in HUGE cabinets

**mrfabulous** · October 30th, 2011, 04:30 PM

Howdy!

Looking for a post (not shure if I saw it here...) where someone mentioned the possibility of using the 604 in a maxxed out cabinet in excess of 30 cu.ft. or even more - in order to get some serious deep bass from these units. Anyone out there familiar with this particular thread?

**Cal Weldon** · October 30th, 2011, 04:37 PM

Hi,

Not sure of the model you are referring to but the 8H's I have, have far too low of a Qts to put in a large cabinet. You would have to EQ a whole bunch of bass back into them to get what you need, and you will run into excursion problems in anything but a small room. I am running mine in a medium small cabinet with a helper woofer as is.

**mrfabulous** · October 30th, 2011, 04:55 PM

Originally Posted by Cal Weldon

Hi,

Not sure of the model you are referring to but the 8H's I have, have far too low of a Qts to put in a large cabinet. You would have to EQ a whole bunch of bass back into them to get what you need, and you will run into excursion problems in anything but a small room. I am running mine in a medium small cabinet with a helper woofer as is.

Actually, these are brand new GPA series III with a Qts of 0.26.

If I only could find that thread - I think someone mentioned useful bass all the way down to the low twenties....

**604man** · October 30th, 2011, 06:18 PM

I posted "604-8G big cabinets big sound" About 9 months ago , The
cabs are 21 Cu. Ft. I think it's on page 26...any questions you can
e-mail me [email protected]

**Cal Weldon** · October 30th, 2011, 08:31 PM

Originally Posted by mrfabulous

Actually, these are brand new GPA series III with a Qts of 0.26.

Same problem. Low Q and big cabinet mean no bass. What's that the point of reaching to or below the Fs if you can't hear it?

If I only could find that thread - I think someone mentioned useful bass all the way down to the low twenties....

That's fine if you are prepared to add EQ and run out of umph really quick.

Consider a normal sized cabinet and adding a woofer designed to do what you want. The 604's I know aren't designed for that.

**cradeldorf** · October 30th, 2011, 11:18 PM

My 12 cubic footers have plenty of low bass.

**Cal Weldon** · October 30th, 2011, 11:24 PM

We all have different taste I suppose but I have no problem with a system Q of .707

**mrfabulous** · October 31st, 2011, 08:41 AM

Originally Posted by Cal Weldon

Same problem. Low Q and big cabinet mean no bass. What's that the point of reaching to or below the Fs if you can't hear it?

That's fine if you are prepared to add EQ and run out of umph really quick.

Consider a normal sized cabinet and adding a woofer designed to do what you want. The 604's I know aren't designed for that.

Thanks for your concern, Cal, maybe I should have specified my needs a bit better, I am not looking for surround-type tear down the walls pumpin' 16 Hz bass, it is more a question of allowing the 604's to breathe freely; I have heard these in standard 7' and 9' boxes and I am quite convinced that they can sound even better, hence my request. And it was that post 604man is referring to, thank you!

**cradeldorf** · October 31st, 2011, 12:53 PM

Just my opinion, Bigger is better but only to a certain extent. I heard mine in several ported adventures and the last one with the slot ports in the back is by far better sounding than any ported box I've heard them in.

**604man** · October 31st, 2011, 07:32 PM

It would be good to review loudspeaker design tradeoffs..Efficiency,Bass extension & Box size...Go here: [url=http://www.trueaudio.com/st_trade.htm]TA Speaker Topics: Loudspeaker Design Tradeoffs www.trueaudio.com The physics dictate that Vb is to be made large.... Another issue is room gain, Do a Google search for "Room gain".....GC.....