Papa’s slot loaded open baffle version #2

[04dgmsilv]

Some progress made on the prototype, it makes music. No measurements yet, using the values from Papa's Cube full range schematic. Spent as much time trying to work on techniques for finishing the wood, baffle turned out decent, frame for 15" needs some work.

 

[flocchini]

woodwork is beautiful !!

 

[Plott]

Looks really good! And the electronics prepared on the cutting board are... appetizing
"It makes music" okay, but how does it sound?

 

[peppennino]

PSU is the Slowdiyer's?
I see you're using only half of the ACN...

 

[04dgmsilv]

Sounds great, but early days for sure. I only fiddled with basic tones (40-80 hz on low end and 1khz on high) and an iphone app to set the levels. Used what I had on hand for plywood and didn't know how it would turn out, so I only built one channel for now. Planning on measuring/tweaking this before finalizing the second channel of the cross over.

Cutting board is Waynes BA2018 (supplied by VRDN) and ACN supplied by little 24V SMPS (yes, slowdiyer's design). Had a muses volume control on there, but keeps giving me trouble, so it was replaced with a PEC pot.

 

[Nelson Pass]

I have my Cubes back in the system while I toy with the ACA mini.

I almost forgot how good they are.

 

[nautibuoy]

As the Eminence Definimax bass units originally recommended for this are now discontinued and I've been unable to locate stock in the UK I've been looking for an alternative.

Based on the TS Parameters these look to be a close match - just wondering if anyone has any thoughts/experiences?

15XB700

Ta muchly

 

[peppennino]

After a test with Eminence drivers of my Pi4, I'd like to try a Faital driver

 

[nicoch58]

As the Eminence Definimax bass units originally recommended for this are now discontinued and I've been unable to locate stock in the UK I've been looking for an alternative.

Based on the TS Parameters these look to be a close match - just wondering if anyone has any thoughts/experiences?

15XB700

Ta muchly

nope Qts is only 0,23 vs 0,52....

 

[peppennino]

Same @ Faital: QTS is no more than 0,37 on 15" but Xmax >9mm is promising with bass EQ and a good power reserve

 

[nautibuoy]

nope Qts is only 0,23 vs 0,52....

Except that the Definimax has a QTS of 0.344 and the Oberton is 0.283

 

[nicoch58]

Definimax lt are 0.52

 

[freddi]

Here's a new GRS 15 claiming 7.8mm xmax, with what seems to be good build quality and a 3" coil for $60US. Fs is rather low at 28.

Shopping

 

[nicoch58]

my suggestion is SB Audience BIANCO-15MW200
nice that grs...

 

[Nelson Pass]

I personally have found that Qts is less critical with OB's. In any case the Eminence betas, Deltas and Gammas do a credible job. Of course the TAD 1601's are still the last word...

 

[nautibuoy]

Definimax lt are 0.52

Wrong drive unit, the recommended bass unit is the Eminence Definimax 4015ULF, you're referencing the 4015LF.

 

[MEPER]

Is this a TAD 1601?
It is branded Pioneer?

 

[Zen Mod]

division of

 

[peppennino]

Yup





Andrew Jones and TAD at the beginning. Great contribution in BA2021

 

[nicoch58]

Wrong drive unit, the recommended bass unit is the Eminence Definimax 4015ULF, you're referencing the 4015LF.

you are wrong you know well that are the LF ,forgot... ??
btw just look: