I need to know the demensions for 10 inch subs

Does the enclosure volume and style/type match the sub requirements? Are the subs wired correctly? I've seen lots of marking on the wrong terminal. Try switching one of the subs from pos to neg and neg to positive. It will be dramatic and very noticable if that's all it is.
Is your cutoff frequency correct for the sub? Make sure they're not getting full spectrum frequency. Are the Subs physically hitting any part of the enclosure at any point in the excursion? Are they screwed securely to the enclosure? Is the sub surround intact and smooth through the full extcurion? Is the amp ok? Got enough current throughout the system? Battery, Capacitor, Wiring, fuses, speaker wire etc. Bigger is better but always the correct fuse rating.
Signal from the head unit? Proper preamp wiring?

You'll only get a subwoofer signal if your cable/satellite box or other source has a dedicated SUB output on a coaxial cable. If it does plug that into the 5.1 SUB input and then as the pic states.

Hello
Check all the input connections to the sub for any loose contact.

The computer sound card has to have enough umph to drive the speakers. Most Netbooks and some laptops just don't have enough power to create loud sound.

For optimal performance there is really only one size for the box .Firstly, you get two different types of subwoofers, an open air, or closed air sub. If it is an open air sub ( hole with mesh in the center of the magnet) no ports are required, and the box should be sealed on the inside with silicone sealant. If it is a closed air sub ( no hole in the magnet) you need a 50mm port about 120mm long. If it is a 12 inch speaker, the box size will be 13 inches x 13 inches x 13 inches. 15 inch, the box will be 16 x 16 x 16

If it is an open air sub ( hole with mesh in the center of the magnet) no ports are required, and the box should be sealed on the inside with silicone sealant. If it is a closed air sub ( no hole in the magnet) you need a 50mm port about 120mm long Box size will be 11 inches x 11 inches x 11 inches

if you dont have a crossover you will not get the best performance out of your sub. you need to seperate the frequencies and send only the lows to the sub woffers.

It sounds like the wiring either to the amp or to the subs is put together wrong. This can be because you have them setup in stereo but have the sub on bridge mode or vica versa. This can also be from how you ran the audio input wither from speakers or rca..either wired wrong or the switch for the two options is wrong. Also make sure your gain is turned up. Sound also depends on what kind of box it is in. It HAS to be in a box.

Could be Faulty RCA wires (they bring the sound from the radio to the amp) or a bad ground (the larger black wire coming out of the amp) This is under warrranty and you should not have to worry about it... bring it back, they make fix..

Dennis

First things first:
1) you can buy on audio stores, boxes for 10 inch speakers
then you can do this kind of work,
I try to do what you did, and you know what happend! *&^%$
Open Sky