AV Receiver that deals with 6ohm speakers

Once again, Stereophile confirms (excerpt from link, above);

Its impedance (fig.1) remains above 6 ohms for almost the entire audioband, with a minimum value of 4.5 ohms at 165Hz. As well as being usefully sensitive, the RS6 is also an easy load for the amplifier to drive: textbook requirements for a speaker that will be used with inexpensive amplification.

NAD may want to cover their ass with the 8 ohm warning, but it's almost impossible to believe that this speaker will stress the power amp in the NAD. I'm sure that there are examples of (nominal) 8 ohm speakers out there that will be tougher to drive than these.

Marty

If NAD has a reason to “CYA”, then it’s only true with a few of their products. Most of the A/V receivers are rated for a minimum of 4 ohms. Looks like the amp stage is NOT the same for all of their receivers.

Stereophile link is for the RS6, and speaker in question is the RX6. As stated previously, the RX6 drops to 3.9 ohms/nominal 6 ohms. Then add the RX Centre with 3.0 ohms minimum/nominal 5 ohms for home theater, and the T748’s reliability is compromised.

Disagreeing with a manufacturer’s recommendation is just asking for trouble.

Sorry.

My bad read on the model # in the linked review (I assumed the link was for the speaker in question). Tls also makes a good point about disregarding a recommendation.

However, not all nominal 6 ohm loads are created equal, and I'm sure NAD's "CYA" 8 ohm warning is designed to minimize the likelihood that the T748 might see a really rough patch from a nominal 4ohm speaker. The RS6, per the review, looks to be a very benign load. Given the common provenance of the RS and RX, I kind of doubt that the RX6 and it's center/side companions would be a problem for the NAD, but I certainly cannot say that for sure, so...

as Tls points out - it's not entirely without risk.

Marty

Oops! Sorry for the wrong model number. The one thing that bugs me is, they were supposed to have settled on a 8 ohm standard for home theater years ago.