Measuring Leroy R's Minions III

[fixthedoor]

Re: Measuring Leroy R's Minions III

Another thanks. I just started eyeballing the TB for use in a computer system, along with the Voxel.

[donradick]

Re: Measuring Leroy R's Minions III

Thanks - I've been thinking about these.

[patrickm]

Re: Measuring Leroy R's Minions III

and since i was limited to 5 images per post, here are the two sets of 70db off axis-measurements together.

off-axis of original, w/sub, no BSC, ~70db. brightest line is on-axis, darkest is furthest off. ignore the blue.


off-axis of original, w/sub, with BSC, ~70db. brightest line is on-axis, darkest is furthest off. ignore the blue.

[patrickm]

Re: Measuring Leroy R's Minions III

I started replying with this info in Leroy's Minions II and III thread, and then realized it was in the gallery and this was better suited here.

There are now some preliminary measurements available, and more to follow. due to constraints on time and volume levels, these measurements still leave something to be desired. only the FR on-axis and distortion were taken at 90db levels, much was done around 70db, and some 80ish db in between. i also need to better characterize the room before i call anything final. all of the ones shown in this post are done with omnimic's blended method. i'm interested to try jeff's method, but excel doesn't live on this PC, so that's going to take some more time.

all testing was done with the minions III (w3-1053sc) in a 4.5" external cube made of 1/4" baltic birch, with a 1/4" roundover on the baffle and heavily stuffed (4" internal cube). for this first round, the only BSC filter tested was one i ballparked prior to building them, L=0.5 R=4ohm. the sub mentioned in some of them is this one under development for this project.


comparison of the raw minions with the BSC & sub. yes, this is an unfair comparison, but i wrote over the image with BSC and no sub and realized it later. (this will get re-done). but ignoring what's below 200hz, i think it shows the BSC circuit is an overall improvement, although without more testing, i don't know if it's the best BSC filter. i'm assuming at this point the dips around 100 and 200 are artifacts of the sub's phase and/or the room.


distortion measurements at 90db and 80db, with and without sub. notice that as you get louder, the distortion peaks become more significant, especially around 550hz and below 200hz. at 90db, some of these are around 3%. at 80, they're closer to 1.5%. as expected from a small full-range without any high-pass applied, there's a good bit of distortion under 100hz.

[patrickm]

Re: Measuring Leroy R's Minions III

[2 reserved for final version]

[patrickm]

[1 reserved for final version]