Jamo sub has power and just the red light on but no green light, if i unplug it from the Yamaha receiver and plug it back in it works then eventually the green light on the sub goes to red and no bass

SOURCE: just got a jamo A3SUB.3

check all your plus sign and minus sign that connected to the receiver , if connected wrong you will not have any bass,because it going backward. Good luck!! any quest email me [email protected]

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: JAMO SUB 650

The jamo sub is a fine buy but also look at subs from REL as they can hit hard when needed and are great for music.Now on to your amp,look round the back and you should find a socket marked sub pre out,plug a sub or phono lead into this and then into the input on the sub,this could be marked in or line in,turn up the volume or gain on the sub and also make sure you have the sub turned on in the speaker settings in your amp.

Hope this helps.
Cable guy.

SOURCE: my jamo sub 200 & pioneer vsx517 receiver is not working properly

What do you mean that it sometimes doesn't work? It doesn't power on automatically?
Check settings of your receiver - if it has subwoofer output enables and if low frequencies from all channels are directed also to the SUB. By default only the LFE channel (.1) of 5.1 signal input is fed to the subwoofer. So Sub will work in this case only when you listen to 5.1 signal (DVD movie for example), but for radio or stereo music, only front speakers are used. By configuring this bass redirect, you can use subwoofer for all signal types.

SOURCE: I have bought JAMO sub 250 subwoofer and Pioneer

Hi,
You don't need such cable, although you can use it if you have one. If receiver has only mono SUB output (as majority of receivers have), you just connect it to the Left socket on the Sub and it will work.

Using the Y cable would probably cause that you will fed the same signal to both left and right sockets, but half the intensity (you would divide the output from receiver by 2). So in the end the Sub would receive exactly the same signal as when using normal straight cable.