QSC MX3000a question

[AngrySailor]

Caps are more expensive than replacing the boards. I have spare compression drivers so I’ve ordered new diaphragms for 4 tweeters @ 16 ohm so I can parallel 2 for 8 ohm and split the power between them. I’ve also order attenuators to drop the voltage and extra dB the from the added drivers.

The only benefit of ordering caps would be to use a pair of polar caps rated for 200v as I cannot get the value I need in a non polar cap...

 

[laatsch55]

By God AS, you're getting a handle on it sounds like..

 

[AngrySailor]

Trying to rein in 10.1876 horse power and guide them out my speakers! Just a days work...

 

[laatsch55]

No worse than keepin a ship runnin right??

 

[AngrySailor]

Ran some frequency sweeps on the sub cabinets as I wasn’t happy with their sound. They checked out as resonating at 35hz which is below spec for tuned frequency for these speaker. I cut the ports shorter until I reached 43hz (Eminence recommended 40-44hz). I did one cabinet first and compared them back to back. The 43hz tuned cabinet sounded much punchier and pleasing to the ear. I tuned the other the same.

Parts arrived today, 4x16ohm tweeter kits, attenuators and new crossovers. Next couple days I will install these parts. Need to borrow a ladder to access the cabinets though. I have to cut new openings for the added horns and attenuators. Soldier and shrink wrap some new wiring to do a neat job of things.

 

[laatsch55]

PICS!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 

[AngrySailor]

PICS!!!!!!!!!!!!!!!!!!!!!!!!!!!!

I cut the ports with a zip wheel on a die grinder. Wasn’t too exciting. They were about 8” long x 4 ports per cabinet. Took 2 1/2-3” off to achieve the change I wanted. Next couple days I’ll take pics as I put the new goodies together though!

Been solid snow here last few weeks so here’s a few pics of my adventures lately. We crossed about a mile of Atlantic Ocean to reach that lighthouse, my friend found some thin ice!!!

 

[laatsch55]

LOL!!!! Ok AS ya got me~!!~

 

[AngrySailor]

Opened the box of goodies just now

 

[laatsch55]

That's a few goodies there bud...

 

[AngrySailor]

That's a few goodies there bud...

Just parts. Wasn’t huge $, just hope it helps make shit work if I don’t get over the top with input voltage!

 

[laatsch55]

Yeah, just a bit further to the right....

 

[AngrySailor]

Yeah, just a bit further to the right....

...it’s hard not too!

 

[laatsch55]

Oh, believe me ....I know.....

 

[AngrySailor]

So my spare compression driver magnets were left on the shelf... BEHIND MY SURFACE GRINDER!!! Damn it!!! I’ve got one voice coil gap almost clean. Half a roll of masking tape and an hour or so later...

 

[laatsch55]

Oh....I bet that's tedious!

 

[AngrySailor]

All done! 4x16 ohm drivers ready to install. Now I’ve got to bring the cabinets down it get a ladder to cut some holes.

 

[AngrySailor]

One side done! Sounds much better with the tweeters attenuated a bit.

The porting change made a HUGE difference. Stuff that’s been hanging on the wall for the last 4 years started falling off!

 

[laatsch55]

What's the watt rating on that L-Pad??

 

[AngrySailor]

What's the watt rating on that L-Pad??

100w rms. The tweeters are 80w rms each and the crossovers are 400w rms.

Got the other side done! Sounds much better, now see how long it lasts...