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keep blowing subs.


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jpizzle 
Member - Posts: 3
Member spacespace
Joined: December 07, 2010
Location: Florida, United States
Posted: December 07, 2010 at 10:24 AM / IP Logged  

Headunit: Pioneer AVIC X920BT

Amplifier: Pioneer GM-D7500M - Class-D Mono Amplifier with 800 watts Max.  400 Watts x 1 @ 2 ohms

Subwoofer: Pioneer TS-W308D4 12" DVC 4 ohm Subwoofer.  1400 watts peak.  400 watts RMS.

Amp Wiring Kit: < color=#1a75cf>Scosche 680W 8-Gauge Wiring Kit for Single Amps

I had a cheaper Pioneer sub before, & I blew that in 2 days, but I had this subwoofer about 1 month before I blew it.  I was listening to White Girl by Jeezy & it started to smell...  :/  Haha.

The amp's gain is set directly in the middle, no bass boost on amp, no bass boost from radio, subwoofer level set anwhere from -4 - 0 on the headunit. 

I'm buying a new 4 gauge amp wiring kit & I'm trying the same subwoofer & amp again. 

Why do you guys think I'm blowing the sub?  Too loud & too long & too much bass?

Thank-you!

jpizzle 
Member - Posts: 3
Member spacespace
Joined: December 07, 2010
Location: Florida, United States
Posted: December 07, 2010 at 10:25 AM / IP Logged  
Car: 2009 Cobalt
icearrow6 
Copper - Posts: 497
Copper spacespace
Joined: February 02, 2009
Location: California, United States
Posted: December 08, 2010 at 12:31 PM / IP Logged  
Is your woofer in a ported box? if so what subsonic filter are u using?
jpizzle 
Member - Posts: 3
Member spacespace
Joined: December 07, 2010
Location: Florida, United States
Posted: December 08, 2010 at 7:53 PM / IP Logged  
Nope.  The sub was in a sealed box, although the box wasn't perfectly sealed.  (My friend gave me the box for free).
i am an idiot 
Platinum - Posts: 13,693
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: December 08, 2010 at 8:15 PM / IP Logged  
Whatever is controlling the output level of the radio is what is blowing your speakers.
howie ll 
Pot Metal - Posts: 16,466
Pot Metal spacespace
Joined: January 09, 2007
Location: United Kingdom
Posted: December 09, 2010 at 4:19 PM / IP Logged  
The gain is too high on the sub amp.
i am an idiot 
Platinum - Posts: 13,693
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: December 09, 2010 at 6:21 PM / IP Logged  
I figured at least you would get that one Howie.  I was talking about an overactive right hand.
howie ll 
Pot Metal - Posts: 16,466
Pot Metal spacespace
Joined: January 09, 2007
Location: United Kingdom
Posted: December 09, 2010 at 6:35 PM / IP Logged  
Couldn't make the link, right hand drive!
Maybe it's a faulty flux capacitor.
i am an idiot 
Platinum - Posts: 13,693
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: December 09, 2010 at 7:38 PM / IP Logged  
I have been wondering for a long time, On a Right hand drive car, what is the position of the clutch brake and accelerator?  Is the clutch against the transmission hump or next to the door?
rfhvhtoo 
Copper - Posts: 238
Copper spacespace
Joined: June 13, 2008
Location: Florida, United States
Posted: December 09, 2010 at 8:48 PM / IP Logged  
I'd say check your voltage drop with a DMM while playing that song and set your subwoofer gain with a DMM meter using the Power=Volts^2/Resistance) formula if you cant really hear the distortion as you set your gains, use a -6db 40-50hz test tone. If you're running the subwoofer @ 2ohms you'll need to get to about 30 volts AC out of your speaker terminals with all bass boosts at 0 (not in the negatives) UNLESS your KNOB is a GAIN knob. Figure that out, my amplifier had me stumped for a while because the knob clearly says "BOOST" on it, yet I called the Manufacturer and they stated that the knob actually controls the gain of the amplifier and the "bass boost" is on the side of the amp. Look into a BIG 3 upgrade if you haven't done that, you may just have bad ground connections. I've blown many subwoofers because of that simple misfortune. Hope it helps!
I can't hear you!
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