Sub connection choices

[JES14]

I have always been using the sub or lfe out from the receiver, but I was re-reading the Velodyne manual and came across this method.

"Figure 1 shows connection to a pre-amplifier's main outputs and returning
them to your amplifier inputs.
When installed in this fashion, your satellite speakers will be crossed over
at 80/100Hz (or 85Hz for CHT-8/-10) which removes the lower bass from
your amplifier and speakers, enabling them to do a better job reproducing
high frequencies. By utilizing this method, you will have a bi-amplified
system, gaining improved power and headroom for your system."


Excuse my ignorance, but is this saying, use the receivers pre-outs for the main speakers to the subs input, then high pass output back to my amp? Will this work safely? Will there be a noticable increase in headroom and power?

 

[mtrycrafts]

I have always been using the sub or lfe out from the receiver, but I was re-reading the Velodyne manual and came across this method.

"Figure 1 shows connection to a pre-amplifier's main outputs and returning
them to your amplifier inputs.
When installed in this fashion, your satellite speakers will be crossed over
at 80/100Hz (or 85Hz for CHT-8/-10) which removes the lower bass from
your amplifier and speakers, enabling them to do a better job reproducing
high frequencies. By utilizing this method, you will have a bi-amplified
system, gaining improved power and headroom for your system."


Excuse my ignorance, but is this saying, use the receivers pre-outs for the main speakers to the subs input, then high pass output back to my amp? Will this work safely? Will there be a noticable increase in headroom and power?

I am not picturing what they really mean by this since they are talking about crossing the rears at the stated FR. That would mean access to all the channels and selecting out the lows from all the channels. That is what a bass management does in a receiver, so I don't see what they are talking about.

 

[markw]

This hookup assumes you can interrupt your signal path between the preamp and main power amp.

First off you would set your receiver's subwoofer to "off" to and set your front mains to "large" to feed the full range to your front mains.

You would first connect an interconnect from your preamp out to the subwoofer's line level input. You would then use another pair of interconnects to feed the subwoofer's line level output to your main amps input.

Basically, you are feeding feed the full range line level signal to the R/L subwoofer inputs. this is a good thing

Then, on the subwoofer, you would select either 80 or 100 hz for the cutoff point.

The sub would amplify the frequencies below that 80/100 figure and return the frequencies above that to your main amp's inputs. This would most certainly reduce the strain on your receiver's power amp by alleviating the need for it to reproduce the power draining low frequencies.

Of course, if you have a properly set up LFE output on the receiver this is a moot point. It's bass management should already do this.

 

[brendy]

By using the bass management of the receiver you do the same thing.Also,the bass management of most receivers gives you a lot more flexibility.

 

[JES14]

I see, so it's really just the long route, plus more expense for cables, from the lfe connection. If it's no improvement I'm not interested, thanks for the replys!