How to install my jamo sub 210 subwoofer - Jamo SUB 250 Subwoofer

SOURCE: Jamo 250

hi, there must be this LINE IN socket (ur so called Hole), then on the onkyo, there must be this sub-line out socket, plug one end of the RC socket to the sub out of onkyo , and other to the line in of the sub, its all to do wirth its appropriate inputs and outputs,let me know

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: 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.