REL speakon connection to amp vs speakers

I have done both. On my old setup my fancy speaker cables were terminated in banana at my amp end and spade at the speaker end. I had some custom rel spec cables from an even earlier setup that were terminated in banana so I just piggybacked them off the speakers. It worked fine. 

whenever I upgraded to my current system, and my new speakers, cables, and Rels I made sure to order spades for my main speaker cables so i could piggyback the banana rel cables off the amp. 
 

i suggest calling rel and just asking what they think! 

 I am wondering if there is any audible difference between connecting them to the amp or to the speakers directly and am guessing somebody here has tried it.

Honestly I was confused by this question, and because others had chimed in with advice I thought I'd add my 2 cents.

@tony1954 for balanced amps you just need to "float" (not use) the ground for the supplied  speakon cables. The "issue" is 60Hz hum. Doesn't apply to either RCA inputs.

@andrewkelley +1 definitely call REL that's what I did 

I believe the OP was going to use the speaker-level connection.  His question was if there was a difference connecting at the amp vs the speaker.

Electrically, they are the same.  The REL input is "reading" the signal just like a volt meter and is a very high resistance device.

It should not make any difference.

Currently using two T/9x with Magnepans.

@macg19 

"@tony1954 for balanced amps you just need to "float" (not use) the ground for the supplied  speakon cables. The "issue" is 60Hz hum. Doesn't apply to either RCA inputs."

I am not sure you are correct with this. Below is the response I received from Rel regarding hookup to my MF integrated.

"Your Musical Fidelity M6si is a balanced differential amplifier, if you're hooking up a pair of T/7i's, don't hook it up to the negative speaker terminal with our SpeakOn cable.  Instead hook it up to the phono ground terminal and twist the red & yellow wires together and wire into the positive on each channel. 

If you only have one T/7i, then wire it from the preout to the low level input on the back of our sub. The low level uses the same exact audio filters as the high level. "

@macg19 

"@tony1954 for balanced amps you just need to "float" (not use) the ground for the supplied  speakon cables. The "issue" is 60Hz hum. Doesn't apply to either RCA inputs."

The issue is not hum. The issue is that with balanced amplifiers BOTH speaker terminals are HOT. Unlike typical amplifiers, where the red terminal is hot and the black terminal is the ground, both terminals are hot with the negative being 180 degrees out of phase with the positive terminal.

If you hook up to both terminals you are actually shorting the circuit. "Floating the ground does nothing.