2(3015) in 45x45x23 @ 30hz-120

[olsound]

Can someone tell me how much db i can get out of two 3015 in a box 45x45x23 @ 30hz to 120 or160 hz.

Thanks

[mr. doom]

In a box tuned to 35hz I modeled 128db with 700watts. Reached x-max @ 70hz and at 30hz a pair will reach x-max around 112db. If you play around with a box modeling program you can see the relationship between power and driver specifications for a given enclosure.

What are you trying to accomplish?

[Top Shelf]

+1 to mr doom, did you happen to tear the guts out of a LabHorn by chance?

[djk]

Tapped horn with two 3015LF ±2dB 31hz~160hz or so.

[djk]

Same basic TH with two 4015LF vs one LAB 12 cabinet (two drivers).

[olsound]

What are you trying to accomplish?[/QUOTE

1. Trying to rebuild my old System
2. To get as much db out of two 3015 from 30hz up but since this driver can't go that low 35hz to 120hz would do just fine.

Thanks

[weltersys]

Originally Posted by olsound

What are you trying to accomplish?[/QUOTE

1. Trying to rebuild my old System
2. To get as much db out of two 3015 from 30hz up but since this driver can't go that low 35hz to 120hz would do just fine.

Thanks

Any speaker can be tuned to go low, but a high FS, small Xmax, light cone like the 4015 won't put out much level down low.
Trying to get an F3 of 35Hz will lower the output considerably, with the 4015 Fs of 45 you will get better output per cubic foot with an Fb no lower than Fs in a much smaller box than 45 x45 x 23 if you want to use full power.

The 4015 really is designed more for a "full range" top box with an F3 around an octave up (64 Hz) from what you want.

I'd suggest getting some speakers suited for the range you desire, or prepare to be underwhelmed.

[djk]

"light cone like the 4015 won't put out much level down low"

139gm isn't very light in my book, and it has a 9mm x-max too.

http://www.eminence.com/pdf/Definimax_4015LF.pdf

Danley also recommends using a driver with a higher Fs than the cut-off point of the TH.

http://i56.photobucket.com/albums/g1...vs15TBX100.gif

http://www.bcspeakers.com/product.php?id=52

A small TH with the driver Danley uses in the TH-115 vs the 4015LF. The Eminence has over twice the warranty, and is half the cost.

[djk]

±1dB from 31.5hz~125hz, 106dB/2.83V/1M in 2Pi.

[IMG][/IMG]

[weltersys]

Originally Posted by djk

"light cone like the 4015 won't put out much level down low"

139gm isn't very light in my book, and it has a 9mm x-max too.

Eminence makes a lot of good products.
I use about 70 of them myself.

The 4015LF is a good woofer, the "LF" stands for "Low Frequency".

The 4015 is not as good as a woofer, but is capable of more upper output.
It has only 84 grams diaphragm mass, 5.9 mm Xmax, 11mm Xlim and a 45 Hz Fs.

Two very different speakers for different applications.
Cabinets that work well for the 4015LF will not work so well for the 4015.

The OP unfortunately purchased the wrong speaker for extended LF applications.

Art