The Official Acoustic Audio Subwoofer Owners Thread

[mj79]

Originally Posted by ZIPPO

He hasn't said he's tried Option 2 yet. It's a cheap fix( cheaper than a new RCA sub cable ), using a grounding adapter like these:

Attachment 10805

Attachment 10806


Acoustic Audio suggested this as a solution for "Humming Sound". Give it a try it might work.

I agree I guess I misread. I already thought he tried that. I have a bunch of those for work, and in the right situation they actually work pretty nice. But I don't think that's gonna clean up his signal but it might considering it will be a break in the direct amp to wall plug in. But what I would try also just because the amp doesn't have a ground is to really try to break it up and use that adapter in the wall then hook up a 5 outlet strip or surge protector to utilize the ground. Hope that made sense I'm on my damn phone and I hate texting :/

[Laramie55]

Hey all, just got the HD-12 in the door. Beautiful and UPS must've only dropped it once as one of the feet came off bent. I was able to screw it back in even bent so no real harm. The UPS guy said, " Boy, I'm glad you were home!" He didn't relish carrying the sub back to his truck. To my Point!
Why do they send this with cheap-o RCA cable and the 'Y' for that when most? folks have a sub-out and need the reverse 'Y'? I guess it could be me but I bought an excellent sub cable and have to attach it to a Y I don't have. Wish they would have included both 'Y's.
Ok, done *****in' but if someone can explain why they went so cheap i would appreciate it as RCA cable is common as dust and not bothered and simply include both types of 'Y's and don't know who has it in stock. Guess I wan't done *****ing after all! If I want to use my sub cable alone for now(yes, I read it will be a few db less) does it matter which RCA jack on the back of the sub I plug into? I know I saw a post on it in this thread but searching did not turn it up.
Thanks,
Lar

[dvdphile]

Originally Posted by Laramie55

Hey all, just got the HD-12 in the door. Beautiful and UPS must've only dropped it once as one of the feet came off bent. I was able to screw it back in even bent so no real harm. The UPS guy said, " Boy, I'm glad you were home!" He didn't relish carrying the sub back to his truck. To my Point!
Why do they send this with cheap-o RCA cable and the 'Y' for that when most? folks have a sub-out and need the reverse 'Y'? I guess it could be me but I bought an excellent sub cable and have to attach it to a Y I don't have. Wish they would have included both 'Y's.
Ok, done *****in' but if someone can explain why they went so cheap i would appreciate it as RCA cable is common as dust and not bothered and simply include both types of 'Y's and don't know who has it in stock. Guess I wan't done *****ing after all! If I want to use my sub cable alone for now(yes, I read it will be a few db less) does it matter which RCA jack on the back of the sub I plug into? I know I saw a post on it in this thread but searching did not turn it up.
Thanks,
Lar

I agree. Most new avr's have a single sub. out connection. They're probably thinking two subs. so a line out going each direction then to a "y". Who knows??? And yes, you will lose a few db's by not connecting both line ins with a "y" connector. Generally if using only one input its the (l) red but doesn't really matter. For these subs its best with the "y". Cost is about $2-$4. Good luck.

[mj79]

Originally Posted by Laramie55

Hey all, just got the HD-12 in the door. Beautiful and UPS must've only dropped it once as one of the feet came off bent. I was able to screw it back in even bent so no real harm. The UPS guy said, " Boy, I'm glad you were home!" He didn't relish carrying the sub back to his truck. To my Point!
Why do they send this with cheap-o RCA cable and the 'Y' for that when most? folks have a sub-out and need the reverse 'Y'? I guess it could be me but I bought an excellent sub cable and have to attach it to a Y I don't have. Wish they would have included both 'Y's.
Ok, done *****in' but if someone can explain why they went so cheap i would appreciate it as RCA cable is common as dust and not bothered and simply include both types of 'Y's and don't know who has it in stock. Guess I wan't done *****ing after all! If I want to use my sub cable alone for now(yes, I read it will be a few db less) does it matter which RCA jack on the back of the sub I plug into? I know I saw a post on it in this thread but searching did not turn it up.
Thanks,
Lar

Lol just cuz you have a sub rca doesnt mean its best alone.. Its for LFE.. That amp has no LFE, Your gonna be better off using a rca or Y, but to each his own.. Plug into Red then

[ryandubbz]

Originally Posted by mj79

Lol just cuz you have a sub rca doesnt mean its best alone.. Its for LFE.. That amp has no LFE, Your gonna be better off using a rca or Y, but to each his own.. Plug into Red then

Hey mj you think i should try the 3 to 2 prong adapter even though my Sub only has 2 ac prongs?

[ryandubbz]

Originally Posted by mj79

I agree I guess I misread. I already thought he tried that. I have a bunch of those for work, and in the right situation they actually work pretty nice. But I don't think that's gonna clean up his signal but it might considering it will be a break in the direct amp to wall plug in. But what I would try also just because the amp doesn't have a ground is to really try to break it up and use that adapter in the wall then hook up a 5 outlet strip or surge protector to utilize the ground. Hope that made sense I'm on my damn phone and I hate texting :/

so i should buy a 3 to 2 prong adapter, plug that into the wall outlet, then plug a new Surge protector into that and then my sub into the surge protector????? Do i then have to add a ground from the 3 to 2 prong adapter to something???? Should i just open up the sub and see if i can see anything in there causing this, or is it most likely something internal of the amp

Does opening up the sub myself void my shady warranty with them?

[mj79]

Originally Posted by ryandubbz

so i should buy a 3 to 2 prong adapter, plug that into the wall outlet, then plug a new Surge protector into that and then my sub into the surge protector????? Do i then have to add a ground from the 3 to 2 prong adapter to something???? Should i just open up the sub and see if i can see anything in there causing this, or is it most likely something internal of the amp

Does opening up the sub myself void my shady warranty with them?

umm.. yes..?? Trying to limit whats wrong i guess.. But all surge protectors have a ground, So plug the adapter into the wall, then the SP into the adapter, that way you have things hooked up as best as possible to try to eliminate any interference that might be in your homes electrical.


Maybe its your receiver

[mj79]

http://www.google.com/products/catal...586&sa=title#p


http://www.amazon.com/Belkin-12-Outl...2731959&sr=8-1

[ryandubbz]

Originally Posted by mj79

umm.. yes..?? Trying to limit whats wrong i guess.. But all surge protectors have a ground, So plug the adapter into the wall, then the SP into the adapter, that way you have things hooked up as best as possible to try to eliminate any interference that might be in your homes electrical.


Maybe its your receiver

Ive brought my sub upstairs and plugged it alone into an outlet and it still hums. I plugged my htib yamaha sub into the same outlet and the yamaha sub doesnt hum

[ryandubbz]

so before i run to radio shack, and get a 3 to 2 prong adapter, Is this what i want to do?

Plug the surge protector into the 3 to 2 prong adater
then plug the 3 to 2 prong adapter into the wall
then just plug all my electronics back into the surge protector

And hopefully this fixes the hum?

Any other things i should pick up at radio shack? Leavin in like 30 mins

[mj79]

Originally Posted by ryandubbz

Ive brought my sub upstairs and plugged it alone into an outlet and it still hums. I plugged my htib yamaha sub into the same outlet and the yamaha sub doesnt hum

Like I and a few others suggested 5 pages ago.. Its your amp.. Just like a hum in your car through your speakers is 99% of the time caused by your alt ( and 1% a bad ground ) This is almost as obvious.. If you have a standard home your wiring is 14/2 or 12/2 And if it was an electrical issue , you would be experiencing a hell of alot more issues than humming.. Starting back at the breaker where each 110 splits into the box.. Its your amp.. send that bish back

[ryandubbz]

Originally Posted by mj79

Like I and a few others suggested 5 pages ago.. Its your amp.. Just like a hum in your car through your speakers is 99% of the time caused by your alt ( and 1% a bad ground ) This is almost as obvious.. If you have a standard home your wiring is 14/2 or 12/2 And if it was an electrical issue , you would be experiencing a hell of alot more issues than humming.. Starting back at the breaker where each 110 splits into the box.. Its your amp.. send that bish back

ive tried 2 times today calling and Sent emails on wanting an rma on this brand new sub and they send automated emails back to me and never anwer the phone. And let me guess i have to pay for shipping to ship this 45 pound sub back. THat will cost like 35 bucks. and then whats the turn around time?

[mj79]

Originally Posted by ryandubbz

so before i run to radio shack, and get a 3 to 2 prong adapter, Is this what i want to do?

Plug the surge protector into the 3 to 2 prong adater
then plug the 3 to 2 prong adapter into the wall
then just plug all my electronics back into the surge protector

And hopefully this fixes the hum?

Any other things i should pick up at radio shack? Leavin in like 30 mins

if that Adapter actually makes a difference i will more than likely crap myself...

[mj79]

Originally Posted by ryandubbz

ive tried 2 times today calling and Sent emails on wanting an rma on this brand new sub and they send automated emails back to me and never anwer the phone

yea you gotta call in the AM , they claim to call you back in 2-3 hrs, but thats not the case all the time.. Where is that AA rep that was in here a while back??

[mj79]

Originally Posted by ryandubbz

ive tried 2 times today calling and Sent emails on wanting an rma on this brand new sub and they send automated emails back to me and never anwer the phone. And let me guess i have to pay for shipping to ship this 45 pound sub back. THat will cost like 35 bucks. and then whats the turn around time?

Yup you gotta pay to ship and return ship... Tell them your not gonna pay full price to ship something back that was busted out of the box, tell them your sending amp only... $5 shipping

[ryandubbz]

Originally Posted by mj79

Yup you gotta pay to ship and return ship... Tell them your not gonna pay full price to ship something back that was busted out of the box, tell them your sending amp only... $5 shipping

Thanks man, so should i even try the 3 to 2 prong idea or is this for sure the amp

[mj79]

Originally Posted by ryandubbz

Thanks man, so should i even try the 3 to 2 prong idea or is this for sure the amp

I cant say "for sure" but it really sounds like an amp issue, especially from what ive read on humming issues with the amp in this thread.. You could try it i guess, its probably only a few bucks, but i dunno "for sure"

[ryandubbz]

Originally Posted by mj79

I cant say "for sure" but it really sounds like an amp issue, especially from what ive read on humming issues with the amp in this thread.. You could try it i guess, its probably only a few bucks, but i dunno "for sure"

does it hurt anything losing that third ground for the surge protector?

[mj79]

Originally Posted by ryandubbz

does it hurt anything losing that third ground for the surge protector?

like you wanna break it off?

[ryandubbz]

Originally Posted by mj79

like you wanna break it off?

I mean when i plug my 3 prong surge protector into the 2 prong adapter and then plug that into the wall outlet. Does losing that 3rd prong hurt any electronics? Wont that make it so if my receiver metal case became energized and i touched it i would get zapped?