View Full Version : Grainy Speaker Output?

05-04-2019, 08:39 AM
Good morning everyone, and May the 4th be with you!

As you can expect, I've got my older builds charged up and ready for today while I work on my next saber. While goofing about with my 2017 build, I noticed that the speaker now boasts a really "grainy" sound to it. It's not terribly noticeable during the motionless humming, but when the saber is swung, or clashed, or performing a blaster block/lockup, you can really hear how grainy the speaker sounds.

The build is a CF8 with 2W Bass speaker. I connected my rice cable recently and turned the volume down from 4 to 3 but that is about the only adjustment I've made which would involve the speaker.

Looking to see if anyone has come across this before. I assume it's either a connection that is becoming stressed or the speaker is going bad? I gave it time overnight to come to a full charge to see if that was the issue but the grainy-ness persists. I've had this saber completed since about August of 2017 and this is the first time I've heard it sound like this. I would love to avoid replacing the speaker as it's pretty snug in a chassis, but if that's what I gotta do then that's what I've gotta do.

Thanks everyone!


Forgetful Jedi Knight
05-04-2019, 11:06 AM
What kind of LED setup are you running? Does each die have a resistor on it?

05-04-2019, 11:34 AM
I've got the R/G/RB Cree Coppernova and the PC/CF Color Extender V3. The Red and RB are connected to the CEX and the Green LED goes through the high-power LED pads on the CF8, no resistor. I also have 2 illuminated AV switches which each have a DynaOhm resistor.

I adjusted some of my color mixing using the RICE configurator while I was in there adjusting volume. Do you think I may have set one of the dies too high which is causing this?

Forgetful Jedi Knight
05-04-2019, 11:36 AM
Which battery (specs) are you using?

05-04-2019, 11:38 AM
Panasonic 7.4v 18650 3400mAh Lithium Ion pack, hooked up to a recharge port.

Forgetful Jedi Knight
05-04-2019, 11:42 AM
What did you set your die settings to?

05-04-2019, 11:57 AM
I only adjusted one color profile, as I usually only run Green and I wanted my FoC to be yellow and not magenta as the default had been. Currently, that profile is running channel 1 @ 861mA while channel 2 & 3 are 0 mA.

My FoC settings, if those are helpful at all, are channel 1 @ 784mA, channel 2 @ 322mA, & channel 3 @ 0 mA

Forgetful Jedi Knight
05-04-2019, 12:02 PM
Well, that should cause any issues at all. It sounds like it might be the wiring form your speakers to the board. Id check that or the actual speaker itself.

05-04-2019, 12:06 PM
Sounds like a plan. Thanks for looking into this with me, FJK. I'll post an update if I find anything in that regard.