Just starting out and need advise for sub woofer connection


Hi I’m a rookie you guys are the big leagues so I am asking for your help.
I recently purchased a Canton K9 bookshelf speaker and stands. This speaker has a set of speaker cable posts for high and midrange and another set for the bass with jumper bars attached to the two sets of posts. Adrian the seller was so kind to include a Jamo c80 sub in my purchase. Which I hooked up as Paul McGowan the PS Audio poobah suggested by running speaker cable from my amp to the c80 cable posts for both left and right channels. Given this set up since both my main Cantons and the sub are receiving bass frequencies and both are playing them, this seems to be a duplication of effort and seems wrong. I was wondering could I, should I remove the jumper cable from my Cantons and attach my speaker cable to the terminals marked high and midrange? I assume doing so stops my Canton drivers from having to play bass frequencies. That Would free up these speakers from bass responsibilities? Is that a good thing? Should I do this ? and what must I be mindful about if I do this? Do I have to do anything to my subs crossover a knob reflects 40HZ to 200HZ  The canton literature mention a cross over at 3000 hz which to me woulld mean at the very least the difference between 200HZ and 3000 hz would be lost or should I forgetabout using the sub? The c80 also has what look to be RCA connectors titled Line left and right in and left and right out. Finally there is a LFE connection which is the same as the RCA left in. Thank you in advance for your help. Regards Scott
scott22
Keep your Cantons fully connected with the jumper. They go down to 25Hz. If the crossover is 3,000Hz, you lose most all of the speakers capability. The Jamo goes down to 20Hz with a lower cut-off at the sub of 40Hz. I would hook up as you explained via the high level speaker terminals. Then to start, set the crossover at the sub to the lowest setting of 40Hz and adjust the gain. Bottom line, you are going to have to experiment with the subs best placement within your room, and the gain while playing a dynamic recording. And, who knows, you may even try raising the cut-off higher at the sub. No two rooms are the same, so there isn’t just one solution to this.

But don’t worry about the speakers and subs ‘being redundant’, when you get everything balanced, the extra bass can make a nice difference and will help the Cantons, not take away from them. Again, you just have to experiment and find out what makes your Canton’s sound best with the additional bass from the Jamo. The key is for both to sound as seamless as possible, and not to know there is bass coming from the sub specifically. In other words ‘disappear’. If the Jamo is obvious, you have work to do with placement and settings.

I am being extremely basic here.

As far as the RCA inputs, does your preamp or integrated have RCA outputs for this purpose? Does it have LFE? Personally, for music, I would disregard the LFE completely. And simply do as Paul describes, and which you referred to.

You will have many other suggestions, but I would start as suggested above. Just don’t not lose the majority of your Cantons capability, actually you would be using less that half if you took out the jumper.

I wish I could help but the C80 manual don't git it. It sez hook it to the amp outs.. Fine. Then what? No mains?
You can not parellel them without a padded speaker switch. The only sub I have hooked to an amp output (outside) is fed by a 5 pair switch. Then the tiny main speakers for this set is fed from the sub out which is crossed high. All my other subs are hooked via line outs. This makes more sense since they are powered by their own amps.
I do not see ANY of those options for you.
Unless your amp has A & B speakers, you need one of these:
https://www.amazon.com/dp/B00DIGD604/ref=cm_sw_r_cp_apa_i_rvMdFbNSJ95NJ
Make sure it's rated for your power.
Run the mains full range as intended.
The C80 Manual does not state hooking up the sub via the ‘main outs’, but the pre/integrated ‘sub outs’ or LFE. Or, via the high level speaker terminals, which I would recommend, personally. The last thing I would do is use LFE for music. Home theater? maybe, but that’s a whole nuther can of worms.
Does the sub have line in?
I can not tell, I can find no photos. If so, you amp setup is all important. I've added RCA's tapped to the volume pot on an ntegrated before.
More info necessary to remediate.