Subjective comparison between a robust Onkyo and Integra flagship AVR's, Quad 606 and XLS2500 power amps and the Integra DRX3.4 AVR (same amps as the NR7100) - only the DRX3.4 sounded less than perfect driving my speakers - all the others handled the speakers fine and sounded as they should.
Any speakers with difficult load needs separate amps for any ave.
1.6ohm is very low. Most AVRs and a lot of amps will have an issue driving that. I don't think most 4ohm speakers even drop that low, it's usually just a few.
Like I've been saying - 8ohm speakers (nominal) should be fine, 4ohm speakers can be a problem - This is not a high current amp, and is not well suited to 4ohm nominal speakers... even the mildest 4ohm Nominal speakers tend to have dips down to 3ohm.
Not always, the vintage Onkyo SR876 and Integra DTR70.4 coped without trouble - the similarly endowed current generation RZ70, DRX8.4, LX805 should handle difficult speakers without trouble. - Horses for courses...
Ya had I known the 3.4 was going on sale for $20 more than the NR7100, I would've bought that instead. I didn't find out until months later.
On the other hand, I think people tend to worry too much about narrow dips in the impedance curves of speakers.
Exactly, but if a speaker dips to 1.6ohm for example, then it most likely has an overall low impedance around say 3ohm, but they label it a 4ohm speaker. That could be an issue for a lot of AVRs. IMO if you are buying speakers you should be using measurements to make your choice, and you should be aware of it's impedance graph.
What is your crossover set at?
80. Dirac sets them to 70, again sounds really good.
As bass management for Dirac is strictly on the AVR-side (Onkyo), I'm not sure how Dirac is "setting" it to 70 Hz. The 7100 doesn't qualify for DLBM or DLBC.
I have nothing to prove to you. Dirac sets all peakers to 70 and sub to 120. Screenshot doesn't show sub but in menu it can be seen it always sets sub to 120 and all speakers to 70 after calibration. FWIW, I have this receiver for a couple of years now, played with it a lot, tried different rooms, ran Dirac on it many times, etc.
They are a "true" 4 ohm design, measured by Amir at 3.8ohm absolute minimum.... which makes them fine with the NR7100 - where the low to midrange AVR's get into trouble is with 4ohm designs that have extremes down to 2 ohm or below (like mine!) - which is not uncommon for 4 ohm designs - hence my repeated cautions when combining 4 ohm speakers with the NR7100 or RZ50... - Check the impedance charts!
Might that be where Dirac is setting the "curtains"?
Here is the review/measurements of that speaker...
No idea. I just know that regardless of what I set crossover to, once I perform calibration (via Onkyo Controller app for phone) it changes it for all speakers and sub.
If you use the PC app, you will get more detail, and more control - (which won't necessarily improve the end result!)
Absolutely. Umik-1 arrives tomorrow (well, today, I'm in ET) and this is when I want to use Dirac on my laptop. The reason I've used basic mic and the phone app the entire time is that honestly I'm quite happy with the results. There were times where I found myself spending hours, days even, building and then tuning something, configuring, reconfiguring, etc... instead of actually listening to the music and watching movies. I'd like to change that, and I've made some progress.
