Rs180P/RS28F vs. small DC160 3 way

[filmslayer]

rpb , cuae you asked . 3ft on my design axis as loud as i felt comfortable testing,3rd order ...

[filmslayer]

rpb , i took a bunch of measurements today , i also have that driver at 3ft on design axis . i can go back and pull that up if ya like .

[filmslayer]

That driver looks nice, and smooth, but the 3rd order distortion looks off. Third order distortion measurements are not normally that smooth on drivers I've tested. I suspect that the distortion is lower than shown, and maybe you are measuring the noise floor. If you measure from a couple of feet away, and at a louder spl, I would expect the distortion will be lower over much of the frequency range.

that was the second measurement , first time thedust cap hit the mic ! that was as close as i could get !!! as you know i'm using Holm ???

[rpb]

That driver looks nice, and smooth, but the 3rd order distortion looks off. Third order distortion measurements are not normally that smooth on drivers I've tested. I suspect that the distortion is lower than shown, and maybe you are measuring the noise floor. If you measure from a couple of feet away, and at a louder spl, I would expect the distortion will be lower over much of the frequency range.

[filmslayer]

Whoa!!! Well behaved driver for the price! Looks like you have a winner! :D

yeah , not bad at all for an $8 driver ...

[NyxOne]

Whoa!!! Well behaved driver for the price! Looks like you have a winner! :D

[filmslayer]

with third order distortion ...

[filmslayer]

i'm kinda impressed . Famous Maker 3" raw driver near-field ...

[filmslayer]

UHG !!! with the woofer up 5db at cross i'm gonna go back and redo this with in box measurements ....

[jhollander]

a couple of concerns as ready this for a listen . i hope i got the back side of mid scalloped enough , this tiny lil driver is all but swallowed in a 3/4" baffle and i hope the 3" PVC cap i'm use to seal it is large enough ... what should i be looking at in my measurement when i get around to it ?

See where the mid rolls off with a nearfield measurement. I'm thinking you want a liter maybe a tad more for the DS90, but I like a qt between .5 and .7

[filmslayer]

[filmslayer]

went to 4ohm on the tweet and running the mid wide open un-padded , sounds much better to my ear ! will let the drivers break in now then pull it out in the middle of and try to get some good measurements .
here's where its at now . the bump in the top does not show up in measurements .

[filmslayer]

couldn't stand it ! had to take a look ... i think i need to remove the 1ohm in front of the mid and try a 4-4.5 ohm in front of the tweet instead of the 5 i have ... this was not placed in the perfect spot to measure but taken from where i'm listening to it from 3ft .

[filmslayer]

UHG !!!! not thrilled with first listen ... though it is a live Rush track and the drivers not broke in i feel i'm gonna have to un-pad the mid . balance seems way off . i'll give it while to break in before measurements ...

[filmslayer]

a couple of concerns as ready this for a listen . i hope i got the back side of mid scalloped enough , this tiny lil driver is all but swallowed in a 3/4" baffle and i hope the 3" PVC cap i'm use to seal it is large enough ... what should i be looking at in my measurement when i get around to it ?