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  #1  
Old 05-07-2013, 05:50 PM
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Default sub unloading?

so ive got my opti6k wired at 2ohm (4k) on 2 10" hdc3's in a 3cu box with a 8" aero, tuned to 38hz...when i get to actually turning them up, they get stinky fairly quick...on some songs, they bottom out quickly as well...how do i diagnose exactly what my issue is?...im thinking it either too much port, causing them to unload or too much power
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Old 05-07-2013, 05:54 PM
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box specs?

Edit: I fail hard, didn't read that part I guess lol
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Old 05-07-2013, 05:57 PM
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double baffle, 3cu net...45s in corners...5 1.75" dowels for bracing...one layer of fiberglass...i noticed one sub seems to get hotter as well...but the box is the same on both sides so idk why one would be doing it over the other
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Old 05-07-2013, 06:01 PM
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just glancing at the specs an it sounds like too much port, too big of a net volume, and too high of a tuning..... plus alot of power

itll probly take a good design to get that much power right
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Old 05-07-2013, 06:02 PM
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that box sounds a bit big for 2 10's
have any pics?

I would drop it to 2cf, and If you can add like 4" to the port
or try 2.5cf

stick a brick in the box for something! haha

also try to see if its just one sub or both.
you may have a high pressure side or low pressure side from port orientation
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Old 05-07-2013, 06:02 PM
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turn the gain down. see if they get hot as fast. they bottom out because its a ton of port in a large box for two tens. you're tuned at 38 as well. with the box/port/tuning, dont expect to play below say 35 with any authority/without damage
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Old 05-07-2013, 06:02 PM
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Amp setting all good/same as before? Sub sonic should stop the bottom out... is it clipping?
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Old 05-07-2013, 06:04 PM
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Subsonic too low bottoming out below tune
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Old 05-07-2013, 06:08 PM
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How new are the subs?
tuning is real high also
live and learn
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Old 05-07-2013, 06:09 PM
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i dont think its clipping...had them in a 2cu box before tuned to like 31hz and the gain was around the same spot on the amp...they are ALOT louder in the 3cu box...night and day difference...thats why i think it might just be a little too much port..i might try a 6" aero...and as far as sub orientation, its sub/port forward, port in the middle...the best song ive found soo far is Phone Numbers from the Decaf zip...it gets violent...and from what ive seen, AQ's like bigger boxes
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