59L Tapped Horn

[Booger weldz]

I see why the enclosure is sealed. All the BR (TL too) and BP6S enclosures are coming up terrible in HR.
I'm going see what BP4 I can come up with.

View attachment 1309659

Look at the roof. its ported

 

[BP1Fanatic]

So much for modeling a DD Audio Z3 or Z4 driver.

"You’ll notice the standard TS parameters are missing for the Z subs. This omission is on purpose because each Z is custom built to order allowing for Zillions of possible parameter sets making one static set of specs very prone to inaccuracy. The reason we build Zs custom to order is it gives a system designer the utmost freedom to design for their specific application."

 

[BP1Fanatic]

Look at the roof. its ported

, I must have thought it was a sunroof hole the 1st time.

 

[maxolini]

so DD audio is crap ? i mean measured TS do not match published numbers ?

 

[Booger weldz]

So much for modeling a DD Audio Z3 or Z4 driver.

"You’ll notice the standard TS parameters are missing for the Z subs. This omission is on purpose because each Z is custom built to order allowing for Zillions of possible parameter sets making one static set of specs very prone to inaccuracy. The reason we build Zs custom to order is it gives a system designer the utmost freedom to design for their specific application."

its Not like many of the ‘TS’ parameters matter in these subwoofers and the intended use. Motorforce and suspension stiffness are so radical the rest of the ‘small signal’ paraneters are irrelevant to a dats and laptop measurement ?

 

[Booger weldz]

I dunno what to do with extreme SPL drivers?

 

[maxolini]

Build extreme SPL cabinets 🤣🤣🤣

 

[GM]

Compression horn or misaligned TH.

Sheesh! Grossly misaligned Fs - 100 Hz DTS takes 38 mm Xmax/520 W to reach 115 dB/m/2pi; though at its optimal ~100+ Hz it only needs 28 mm/120 Hz

 

[BP1Fanatic]

so DD audio is crap ? i mean measured TS do not match published numbers ?

No. They custom make each driver.

 

[maxolini]

and i guess you can buy a full size condo for the price of one DD driver

 

[Booger weldz]

Build extreme SPL cabinets 🤣🤣🤣

What exactly is an ‘extreme spl cabinet’?

 

[BP1Fanatic]

412.90cm2 = 16" x 4".
619.35cm2 = 16" x 6".
825.80cm2 = 16" x 8"...855cm2 = B&C 15PZB40 Sd.
1651.61cm2 = 16" x 16".

 

[BP1Fanatic]

What exactly is an ‘extreme spl cabinet’?

What you guys like to call "1 note wonders."

 

[BP1Fanatic]

Sheesh! Grossly misaligned Fs - 100 Hz DTS takes 38 mm Xmax/520 W to reach 115 dB/m/2pi; though at its optimal ~100+ Hz it only needs 28 mm/120 Hz

Sd = 95.03 = in2 or cm2?

D&D Audio Z312 or Z412 10" piston diameter = 10" x 10" x 0.7854 = 78.54in2 or 25.4cm x 25.4cm x 0.7854 = 506.71cm2.

|TRADITIONAL DRIVER PARAMETER VALUES:

Sd = 95.03
Bl = 5.99
Cms = 2.20E-03
Rms = 0.62
Mmd = 9.63
Le = 2.95
Re = 2.17
TH = 1

 

[Booger weldz]

A bass reflex box has ‘one’ resonance?

 

[BP1Fanatic]

412.90cm2 = 16" x 4".
619.35cm2 = 16" x 6".
825.80cm2 = 16" x 8"...855cm2 = B&C 15PZB40 Sd.
1651.61cm2 = 16" x 16".

Lol, I think I got my threads mixed up on my phone!

 

[GM]

Sd = 95.03 = in2 or cm2?

According to CONVERT: 0.061312 m^2 = 95.03379 in^2

 

[BP1Fanatic]

I stated earlier that the 613.12cm2 Sd was incorrect do to the stated 10" piston diameter on the D&D Audio website for both the Z312 and Z412. I think in the customization, the Sd always stay the same.

 

[GM]

Dunno, just noticed how freaking wide/tall the surround is and assuming it's going to 'wrinkle' to the point that it won't contribute much, if any, additional Sd.

 

[BP1Fanatic]

Exactly!

Wow, this site says a 11" piston diameter.

https://southeastcaraudio.com.au/products/digital-designs-dd-audio-z412-12-subwoofer-1

• Piston Dia – in 11
• Frame OD – in 13 3/8
• Frame OD w/Gasket – in 13 ½
• Mounting Diameter – in 12 3/16
• Mounting Depth – in 11 ½