Cable for my Rythmik F12SE Sub

So if im going to go with line out (variable) on the amp to line in on the sub do i take Y splitters on both sides to hook up the subwoofer cable or get two cables?

Spoke to folks at Rythmik they recommend the Blue Jeans LC1 with Y splitters on both ends as i have RCA on amp and line in on the sub.

That is very bad advice IMO. I would absolutely not do that without first checking with Hegel and getting an ok from them.

Putting a y-adapter on the Hegel’s variable line-level outputs will short the left and right channel signals that are provided to those outputs together. While some people do that to provide a mono signal to a sub, and in many cases get away with it, at best it is poor practice, IMO. And depending on the design of the specific equipment (the Hegel in this case) the result could be a reduction in channel separation of the signals provided to the main speakers, or having a mono signal provided to the main speakers, or an increase in distortion, or degradation of the long-term reliability of the Hegel, or even immediate damage to the Hegel.

If an ok from Hegel to that approach is not readily obtainable, I would definitely advise running two cables. Shorting two outputs together is almost never a good idea.

Regards,
-- Al

Thanks Al. Returned the Y splitters If I'm going the way u said. Which makes sense. The blue jeans lc1 is ok for sub interconnect? Or u want me to
look at audioquest or kimber? Also subwoofer is for low frequencies would getting silver or silver coated cable make any difference or is that just snake oil?
thanks once again al u saved my amp!

As you most likely realize cable performance tends to be very system dependent, and I have no experience with Hegel products or with Rythmik subs. But FWIW my guess is that you would do fine with a stereo pair of Blue Jeans LC1 cables. Especially given that any effects they may have on mid and high frequencies won’t matter.

What can often be a more important consideration in connecting a sub to line-level outputs of an integrated amp (or a preamp), though, is impedance compatibility. Unfortunately neither the output impedance of the Hegel’s line-level outputs nor the input impedance of the Rythmik sub’s line-level inputs is specified. While I suspect it won’t be an issue in this case, it might be a good idea to ask the two manufacturers what those values are. In the case of the Hegel ask what the output impedance is at deep bass frequencies, and in particular at 20 Hz.

If the input impedance of the sub is at least ten times as much as the output impedance of the Hegel at 20 Hz impedance compatibility will be assured.

Good luck. Regards,
-- Al

thanks for your response Al. that was very insightful. Will order two blue jeans LC1 sub interconnect in that case. will ask Hegel and Rythmik about the respective questions. thanks once again Al. We only keep learning everyday something new from you always :) forever grateful to u for that.