Subwoofer suggestions for amplifier

[Thines_1]

Hi, i have this amplifier (Alfa Linear AL320.4) in my car, the previous owner installed it, but the subwoofer isnt working. The amp has power going through it, so its still fine. Any ideas on what subwoofers supports the amp? Not sure how to select a subwoofer for the amp since there is watts and ohms matters..

 

[americanaudiophile]

That's a 4 channel amp that can be bridged to a 2 channel amp. Can't be bridged into a mono amp.
In 2 channel it will output 160 watts x 2 into 4 ohms. So you want a dual voice coil woofer that has 4 ohm impedance for each coil. It should be able to handle 320 watts using both voice coils. Add your price range and cabinet size to the information and start searching at Crutchfield.com

 

[Thines_1]

That's a 4 channel amp that can be bridged to a 2 channel amp. Can't be bridged into a mono amp.
In 2 channel it will output 160 watts x 2 into 4 ohms. So you want a dual voice coil woofer that has 4 ohm impedance for each coil. It should be able to handle 320 watts using both voice coils. Add your price range and cabinet size to the information and start searching at Crutchfield.com

For the impedance at crutchfield.com, should i choose '1 Ohms or 4Ohms' or just '4ohms'?
It seems '4ohms' has not many choice.