Acoustic Cross Helper Woofer

[Thawach]

seem like u do the bp4 reverse drv. hope that will work well.

[tinitus]

looks like solid and good work

Im sure you will get lots of bass

btw, how does the sim look ?
the previously shown sim appeared to be with a different driver(RS100)

[Einric]

The sim on the first post shows the DA175 in BP4 w/ an RS100 in a .87 QTC Sealed sub-enclosure. I will hopefully have the first one ready to test today.

Since this is very experimental I am building just one to begin with.
I have both chassis built but I will not flush mount the front drivers until after testing.
If testing goes well I will cut off the front baffle and install a new one with chamfers.
Once that is complete I will apply my raw Afromosia Qtd veneer and then flush mount the drivers.

If testing does not go well I will replace the baffle and create a 2-Way with the DA175 following the alignment from Zaph's BAMTM design.

I have a friend that will come over to run a few passes w/ REW to get some measurements.

[tinitus]

Originally Posted by Einric

The sim on the first post shows the DA175 in BP4 w/ an RS100 in a .87 QTC Sealed sub-enclosure.

really
surpricing to see a 0.58 Qts driver looking that good in 4th. order bandpass
wonder what the secret is

will be interesting to hear the result

[Einric]

I just finished my front baffle and once the glue on the internal brace is finished then I will get the parts installed and test it out.

[Einric]

A little aquarium silicone and some wax paper forms a great gasket.

[Einric]

Here are some shots of the internals and the ports.
I am very close to completion, all I need is the pipe caps and final soldering.

[Einric]

The bass is there and the ports are moving an insane amount of air.
I'm wondering if the two 1.05" ports are not choking the woofer.
The bass is not very loud compared to the other drivers (I figured I'd find that).
The RS100 is still reaching X-Max when cranked even though it is in a .065 cu. ft. sealed enclosure....I have a pair of 250uf NPE's that might solve that.
The biggest problem I have with it is the bass lacks punch and definition.
I may just resort to Plan B and build a 2-Way with the DA175 & DC28F.

???Any Thoughts???

[tinitus]

Originally Posted by Einric

The biggest problem I have with it is the bass lacks punch and definition.

???Any Thoughts???

the punch is above of your sub frequency(DA175), and still left to be handled by your even smaller RS100

close the box, and try 3way active
doesnt have to complicated, or expencive
but much more flexible for 'future fun'

[Einric]

I do agree with your idea of a 3-Way and I'm looking at a 500-4k passive.
LR2xSS1-6xSS1-6.