Hi,I have a jamo s210 subwoofer,it's got current,light on but no sound.what may the cause? input all connected well

SOURCE: I have no amp for jamo 1060 sub

Dual Voice-Coil
The unique Dual Voice-Coil design allows both left and right channel sound from just one speaker. Simply hook up both the left and the right channels to the special terminals on the speaker. Hook up one channel only, if the speaker is to be used in a conventional stereo set-up.
I found this on jamo site hope that will help you

SOURCE: sound faliure

If the subwoofer has its own power cord seperate from the rest of the audio system, the internal amplifier could be fried or u have a loose connection inside the box

SOURCE: How to connect to an subwoofer

You need a subwoofer cable then you attatch the cable from the back of the amp into the sub and power on the subwoofer and amp and hey presto your away.

SOURCE: cannot get jamo 250 subwoofer to work via marantz

hdmi has digital audio in it. no need for optical from same device.
check menu settings in receiver to activate sub, set crossover point and levels

SOURCE: My subwoofer is connected correctly (test mode it

What's the make and model of the subwoofer? It sounds like it's a passive (unpowered) speaker.

http://www.retrevo.com/support/Denon-AVR-589-Receivers-manual/id/23110dj893/t/2/

See page 9

I seriously doubt your test mode worked fine on the subwoofer level adjustmnent.

Get a powered (active) sub.