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skateit_12 
Member - Posts: 34
Member spacespace
Joined: April 22, 2009
Location: Ontario, Canada
Posted: June 29, 2010 at 2:28 PM / IP Logged  
Hey guys,
I am ready to pull my hair out with my system its giving me nothing but grief. I have an 10" alpine type x in a small sealed box, powered by a bassworx 1200.1d amplifier all hooked up to a pioneer deh-p6700mp. The sub is wired to give the amplifier 2 ohms which means 800w rms the sub is receiving. I cant even get the gain to half without the sub sounding terrible and distorting. The sub has never been over powered so if it is damaged I have no idea how. I turn the gain down to where it doesnt distort and you can barely hear the sub it sounds like its 100w sub. The LPF is set to about half way and that is all I can really tune. I had the head unit professionally tuned before so should not be the problem. I have also changed the RCAs 3 times with no improvement.
So I guess what I am really asking is what are some of the most common reasons for really bad distortion? Any tips for me?
skateit_12 
Member - Posts: 34
Member spacespace
Joined: April 22, 2009
Location: Ontario, Canada
Posted: June 29, 2010 at 2:35 PM / IP Logged  
also the head units preamp voltage is only 2v could this be the issue?
topinstaller200 
Copper - Posts: 164
Copper spacespace
Joined: June 02, 2010
Location: Florida, United States
Posted: June 29, 2010 at 2:42 PM / IP Logged  

the recommended size of the box seales is between .5 and 1 cu ft . Is the box within parameters?

try different set up. Test your sub. use just one voice coil then the other

DYohn 
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Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: April 22, 2003
Location: Arizona, United States
skateit_12 
Member - Posts: 34
Member spacespace
Joined: April 22, 2009
Location: Ontario, Canada
Posted: June 29, 2010 at 3:34 PM / IP Logged  
topinstaller200 wrote:

the recommended size of the box seales is between .5 and 1 cu ft . Is the box within parameters?

try different set up. Test your sub. use just one voice coil then the other

The box is just under 1 cu ft, I just tested both voice coils seperatly and they both do the exact same thing, they sound fine lower but once turned up bad distortion.
DYohn wrote:
https://www.the12volt.com/installbay/forum_posts.asp~TID~85479~PN~1
I know how to set the gain, but my point is when i turn it down to the level where there is no distorion you can barely hear the sub, and it is 1000 w rms you should definitly be able to hear this.
DYohn 
Moderator - Posts: 10,741
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: April 22, 2003
Location: Arizona, United States
Posted: June 29, 2010 at 3:56 PM / IP Logged  
Check your VC polarities, and if you know how to set the gain then is your amplifier clipping?
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spmpdr 
Copper - Posts: 456
Copper spacespace
Joined: March 22, 2009
Location: Oregon, United States
Posted: June 29, 2010 at 5:18 PM / IP Logged  
skateit_12 wrote:
Hey guys,
I am ready to pull my hair out with my system its giving me nothing but grief. I have an 10" alpine type x in a small sealed box, powered by a bassworx 1200.1d amplifier all hooked up to a pioneer deh-p6700mp. The sub is wired to give the amplifier 2 ohms which means 800w rms the sub is receiving. I cant even get the gain to half without the sub sounding terrible and distorting. The sub has never been over powered so if it is damaged I have no idea how. I turn the gain down to where it doesnt distort and you can barely hear the sub it sounds like its 100w sub. The LPF is set to about half way and that is all I can really tune. I had the head unit professionally tuned before so should not be the problem. I have also changed the RCAs 3 times with no improvement.
So I guess what I am really asking is what are some of the most common reasons for really bad distortion? Any tips for me?
Do you have settings for your sub channels on your h/u ? Check those as well.I had a similar problem and it was solved by adjusting my sub channel volume from my h/u.
-A vision without a plan is just a hallucination-

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