Please help, been troubleshooting for more then a year

[thegeneralhackr]

Okay so here's my problem, my subwoofer is not very loud at all.

My friend has the same sub I do. His is double as loud.

Both my sub and his were wired in my car to my amp so I know it can't be anything to do with my amp or wiring.

The only difference between the two is the box design. (Internal cuft is the same, I modified mine to be the sane internal cuft as his 0.75cuft: note enclosed boxes)

So what's wrong with my sub? Its moving the same amount as his but not as much sound.

Could clipping cause breakdown of the motor in the subwoofer? I may have been clipping with my old amp for a long while. Could that have caused the lower output? And is there anyway I can test if the sub is still in good shape?

Sub pioneer tsw311d4

Amp pioneer GM-D8601

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[Zero_Ohms]

Is he using the same amp as you? The box design and the car it is used in can make a difference. Even if the box is the same volume inside the design being different can affect it. Put his sub in your box and see if it sounds the same as yours or try your sub in his car.

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[Slo_Ride 5,000+ posts]

If you are saying that you put his sub in you car with his box and it was twice as loud then that obviously narrows it down. The problems lies somewhere within the box, whether it's the box, the sub , or the wiring inside the box itself. Are both subs wired too 2 ohms or is yours wired accidently to 8 ohms? Check your coils with a dmm to make sure you haven't hurt the sub. Double check you box measurements as well as for air leaks.

 

[SuperDuty350]

I'd bet impedance

 

[SuperDuty350]

Edited: Post meant for another thread. Don't know how it got here