Single sheet TH challenge

[NEO Dan]

NICE build Mr. Bob, if he is reading.

[jbell]

agree, nice work bob. I also like the 55-2421 build.

Tapped Horn build

I see a spl meter in one pic, maybe some measurements to share?

[bko69]

Originally Posted by jbell

agree, nice work bob. I also like the 55-2421 build.

Tapped Horn build

I see a spl meter in one pic, maybe some measurements to share?

yes those are both my builds.

the thread for the 55-2421 with measurements can be found here.

the build of my 8 x SS15 can be found here.

i still have not found time to take measurements of my SS15s.

bob

[mr. doom]

Wondering if this would work in the SS15? It is $100 less than the the definimax and looks better than the Kappa pro on paper.

The Fs is 64hz and vas is higher btw.

[djk]

That driver looks lame, and I can buy the DEFINIMAX™ 4015LF for that price.

The Kappa Pro 15LF-2 is a better driver and less money as well.

[Matthew Morgan J]

Here is another driver that might be worth looking into ...AP-1526-8
Has the right specs , 40hz fs , QTS and VAS in the right range ..... Looks like it should work well in an Jim's SS15 and the cost puts it well under the Single Sheet Challenge limit ...
I have seen the Klippel report for this driver and it shows potential ... Around 9mm xmax at 70% BL if i am reading it correctly .... Its also my understanding that the 350w rms rating is very conservative ...
Mark at Audiopile provided some values in surprisingly good drivers in the past from what i understand ...

[mr. doom]

Originally Posted by Matthew Morgan J

Here is another driver that might be worth looking into ...AP-1526-8
Has the right specs , 40hz fs , QTS and VAS in the right range ..... Looks like it should work well in an Jim's SS15 and the cost puts it well under the Single Sheet Challenge limit ...
I have seen the Klippel report for this driver and it shows potential ... Around 9mm xmax at 70% BL if i am reading it correctly .... Its also my understanding that the 350w rms rating is very conservative ...
Mark at Audiopile provided some values in surprisingly good drivers in the past from what i understand ...

I went to check it out and had a snake in my cart! I had forgot about that driver and need to get those m/fing snakes.

[Djim]

Hi All,

The AP-1526-8 looks like the PAS-1507 from the Chinese Wave Audio. Also it is described on the Audiopile website as quote: "Good mid range loudspeaker for PA or instrument applications." which doesn't suggest it has a high Xmax.
It's relative low VAS, low power and relative high sensitivity figures are all signs of a relative high BL combined with a low moving mass, which are not good specs for the SS15.

[Matthew Morgan J]

Originally Posted by mr. doom

I went to check it out and had a snake in my cart! I had forgot about that driver and need to get those m/fing snakes.

Mr Doom, when you saw the snake did you jump back and say "EEEEEK!" ? hehehe

Let me know how good that snake is when you get it, the pricing on some of their cabling seems reasonable ... Their cables look like they might be well built and heavier when compared to some of the similarly priced lower end stuff from PE.

[Matthew Morgan J]

Originally Posted by Djim

Hi All,

The AP-1526-8 looks like the PAS-1507 from the Chinese Wave Audio. Also it is described on the Audiopile website as quote: "Good mid range loudspeaker for PA or instrument applications." which doesn't suggest it has a high Xmax.
It's relative low VAS, low power and relative high sensitivity figures are all signs of a relative high BL combined with a low moving mass, which are not good specs for the SS15.

Hey there Djim ,
I'm not sure if this is the best method but i used hornresponse to calculate the moving mass of the Audiopile driver, and the moving mass looks like it might be very close to that of the Definimax 4015, which makes it significantly heavier than the 3015LF's moving mass .... BL factor is probably around 21 ..
Perhaps not ideal, but apparently workable if the other specs are close enough (based upon the popularity of the 4015LF and 3015LF in these designs) ..
However, i do realize that even though the cone is just as heavy as the Definimax's cone that it doesn't necessarily mean that it is just as strong, and failures such as tearing or cone folding may occur if used in a cabinet that has some compression (S2 area less than driver's SD) ... Its probably just one of those situations where someone will have to give it a shot to see if the cone holds up to some abuse ...