Hi there,

I have two 8 inch woofers from ADS L500 speakers that have no tweeters. Part number 206-0316.

Here are the parameters I measured, average of two drivers:

Znom: 4 ohm

Re: 3.0 ohm

Fs: 22.5Hz

Qms: 1.95

Qes: 0.33

Qts: 0.282

Sd: 211 sq.cm - approx

Vas: 50.5 liters

BL: 9 N/A

SPL: 84.4dB/W/m

I've been wanting to build a TL for a long time now and have not gotten around to it. These drivers would have the following TL alignement, according to the MJK fashion:

L = 147 inches

SL/SO = 1 (what I chose for simplicity and better ripple response despite low-Qts that might call for expanding line)

Xsectional area: 32.5 sq.inches

Driver offset would be about 43 inches

Although the line lenght is insane, the tiny Xsection makes it manageable in a double-fold enclosure of 48 inches high. Xsection would be 8 inches wide and 4 inches deep. I would end-up with external dimensions of 48 inches high by 15 inches deep by 9.5 inches wide, not bad. Fits in two 4'x8' sheets of 3/4 ply.

And although it does not pertain to my question, that would be a 2-way design, with a soft-dome tweeter.

How does that sound?

IG

I have two 8 inch woofers from ADS L500 speakers that have no tweeters. Part number 206-0316.

Here are the parameters I measured, average of two drivers:

Znom: 4 ohm

Re: 3.0 ohm

Fs: 22.5Hz

Qms: 1.95

Qes: 0.33

Qts: 0.282

Sd: 211 sq.cm - approx

Vas: 50.5 liters

BL: 9 N/A

SPL: 84.4dB/W/m

I've been wanting to build a TL for a long time now and have not gotten around to it. These drivers would have the following TL alignement, according to the MJK fashion:

L = 147 inches

SL/SO = 1 (what I chose for simplicity and better ripple response despite low-Qts that might call for expanding line)

Xsectional area: 32.5 sq.inches

Driver offset would be about 43 inches

Although the line lenght is insane, the tiny Xsection makes it manageable in a double-fold enclosure of 48 inches high. Xsection would be 8 inches wide and 4 inches deep. I would end-up with external dimensions of 48 inches high by 15 inches deep by 9.5 inches wide, not bad. Fits in two 4'x8' sheets of 3/4 ply.

And although it does not pertain to my question, that would be a 2-way design, with a soft-dome tweeter.

How does that sound?

IG

Last edited: