Anthem MRX1140

[John Burlket]

Can the Anthem MRX1140 work with 6- 4ohm speakers for surround and Atmos and 6 ohms for the LCR

 

[PENG]

Can the Anthem MRX1140 work with 6- 4ohm speakers for surround and Atmos and 6 ohms for the LCR

It depends on the spl you need at you seating positions and the specifications of your speakers. Under some conditions, even 4 ohm speakers may not be an issue, but under other conditions, it will not even be able to work with 8 ohm speakers (I say this just to emphasizing the point that more info is need).

Peak SPL Calculator (hometheaterengineering.com)
Crown Audio - Professional Power Amplifiers

Those calculators are based on 8 ohms, for 4 ohms, double the calculated "watts" for the same spl.

 

[lovinthehd]

The 1140 has lesser amps for other than the main five channels, too, but don't see that the impedance rating varies (nor 4 ohm rated particularly). But as was said more information about spl level, distance from speakers, particular speakers, etc....so, maybe?

 

[John Burlket]

It depends on the spl you need at you seating positions and the specifications of your speakers. Under some conditions, even 4 ohm speakers may not be an issue, but under other conditions, it will not even be able to work with 8 ohm speakers (I say this just to emphasizing the point that more info is need).

Peak SPL Calculator (hometheaterengineering.com)
Crown Audio - Professional Power Amplifiers

Those calculators are based on 8 ohms, for 4 ohms, double the calculated "watts" for the same spl.

I have 6 JBL SCL-8 – 4ohm speakers in the ceiling. 2 for rear surround and 4 Atmos. The FCR are 6 ohm JBL’s SCL-6 2.5 with one sub.

 

[everettT]

I have 6 JBL SCL-8 – 4ohm speakers in the ceiling. 2 for rear surround and 4 Atmos. The FCR are 6 ohm JBL’s SCL-6 2.5 with one sub.

Does having the rear surrounds in ceiling mess with ATMOS tracks at all?

 

[gene]

Can the Anthem MRX1140 work with 6- 4ohm speakers for surround and Atmos and 6 ohms for the LCR

I wouldn't use 4ohm speakers on the 1140 height amps. Definitely get some external amplification from Monoprice or Anthem if you can swing it.

 

[PENG]

I have 6 JBL SCL-8 – 4ohm speakers in the ceiling. 2 for rear surround and 4 Atmos. The FCR are 6 ohm JBL’s SCL-6 2.5 with one sub.

Trust the spl calculators! It really depends. People say the KEF LS50s are hard to drive, and they are in my living room, but when I use them for my desktop system, they sounded great with my little 50 W integrated amp, and I know I could get by with a 5 to 10 W amp. So again, it really depends. Of course if you hook up a 500 W amp then you know it will be good regardless, but in such approach, no questions need to be ask, just go with the maximum recommended power, and double it!