ART Cleanbox mod thread

[ccdoggy]

I am always interested in moding devices to improve their performance. and with the release of the info that the Cleanbox is really killing the low end I think that we all need to pool our knowledge to mod them to improve where it is lacking.

I personally have no real technical knowledge of how this stuff even works, but I can give you high quality pics and any detailed info you want about it in the effort to improve. I am forced into using it, or something more expensive.


I just thought this needed a new thread as the other one is just bringing the news to light.

[ccdoggy]

The green caps say 473J 100uf
anything else just ask.

[ccdoggy]

what would be the difference going with a 1uF compared to a .47uF?

thinkin i might try and get a few caps today and see what happens.

[ccdoggy]

so it would be fine if i wired them in parallel for testing to show the difference right as it would be a minor increase with the .047 in there.

Also polarity wise does it matter or which prong on the green is positive?

[ccdoggy]

I picked up some Metalized-Film caps 1.0 uF, 250WVDC max. thats all they had for 1.0uF at radio shack.

I dont have any way of measuring a difference using REW as the ART converts to XLR and i cant plug that into my computer.

I could loop it through itself but that would be maybe doubling the problem? worth a shot i guess just to see before trying to mod it.

and that is true about source equipment, but i think i got that covered. My reciever is a Arcam AVR-300 with a Denon 2800 dvd player and a computer connected.

[ccdoggy]

I tried to loop it back on itself and measure but it came out really flat the first time, and almost as flat the second time. so what ill do is to use my SPL meter and a tone generator to take some measurements by hand and that should show some difference.

[ccdoggy]

So i attached the 1uf cap to both green caps and took measurments before and after. looks like i do get a bit better response out of the lower end and it is definetly flatter when taking measurments.

although my testing method has many holes, Using a RS spl meter, using a digital connection to reciever that would take a good amount of effort to calibrate, room not so great its a small box of a room, and construction goin on accross the street noisy.

but i think it does show some improvment. alas i cannot test as others have on its exact response as it converts to XLR and i have no way of connecting an XLR cable to my computer to measure.

just listened to some blueman group and the bass drums do seem a bit punchier and allot more noticeable.

Now that we know it works (nothing on fire) is there anyone out there that could do the mod and post some graphs on how it improved?

here is what i came up with,

Hz Before After mod
10 74.5 85
15 78.3 85.2
20 88.5 104.3
25 101.7 108.1
30 96.7 101.3
35 85 90.2
40 94.8 97.6
45 96.6 97.3
50 94.2 94.6

[Ilkka]

ccdoggy wrote:

Now that we know it works (nothing on fire) is there anyone out there that could do the mod and post some graphs on how it improved?

I can do the mod and measure it, but not until after a few weeks.

[ccdoggy]

i can get a pic up maybe tomorrow or so. Its kinda sorta half assed on there right now, but will do a better job once it is confirmed and no more mods needed or what not.

I must say that the response is all around better, but still lackin a tad in the low end, but i think thats an issue with my computer's digital output and not with the Art. then again i cant really tell as i cant really measure it very well. But it is better and thats what counts.

[brucek]

i cant really tell as i cant really measure it very well.

Why not? Doesn't your soundcard have an analog line-out and analog line-out for use with REW?

brucek