Do the Emotiva speakers use Rubber or Foam surrounds?
Specifically, the ERM 6.3, C1 and C2's.
Here in Arizona foam surrounds do not last.
I have some Klipsch's with rubber that are still fine at 30 years while JBL's and Snell's the same age have had the surrounds replaced twice.
Rubber vs. foam.....the driver responds differently depending on which is used so I would stick with what was OEM. As close as you can get, including the roll radius of the surround.
Allison IC-20's Allison Al 115 Allison NL 1440 Velodyne HGS 18 Emotiva XMC-1 Sunfire Signature 5 channel Amp. 3D Samsung BD-F7500 3D SONY UHP H1 Samsung 8000 3D 55" Denon cassette deck and VCR from the stone age!