The Klipsch Palladium P-39F speakers are nominally 4 Ω, with an impedance minimum in the 2.7–3.2 Ω range (depending on the measurement). They are not extremely difficult loads like Magnepans, which can drop below 2 Ω with very poor phase characteristics. TOPPING B200: 8 Ω (various phases) 158–194 W; 4 Ω (various phases) 140–210 W; 2 Ω (0° resistive) ~71–84 W; 2 Ω (30°/60° inductive) 0 W (protection). I listen to music (and home cinema) at a maximum volume of 40 on the Denon AVR-8500H's 0–90 scale. Will this work? I’m not asking about the sonic benefits of the purchase, but rather whether the Denon will output sufficient signal to drive the power amps—specifically, if I set the TOPPING B200 to High Gain (22 dB), it requires only 3.9 Vrms for full power; will that be okay?
The Denon outputs 1.2 V – 2.0 V RMS from the factory. To fully drive the Topping B200 on the High Gain setting, you need an input signal of approximately 1.4 V RMS. I’d appreciate some help confirming if I’ve understood this correctly.
I think the Denon will drive the Klipsch easily despite the moderately difficult impedance.
It will also drive the Magnepan. Magnepan are actually mostly resistive loads. They are not exceptionally low impedance, and they typically have low phase angle. They are also low efficiency, which has caused people to drive them too hard, leading to the popular (but technically wrong conclusion) that they are somehow hard to drive or need massive power. Not saying they are easy, but they are not a problem for most amps. I sold them in the '80s and could drive them with any amp in our store, including Niles commercial installation amps.
But don't take my word for it, they have been measured, for example:
This is a review and detailed measurements of the Magnepan LRS (Little Ribbon Speaker). It was kindly sent to me by a member and costs US $650. NOTE: as you will see later, this is a special review with far more detail than I usually show in a speaker test. I thought it would be "fun" to see...
www.audiosciencereview.com
Sidebar 3: Measurements The Magnepan's estimated voltage sensitivity was on the low side, at 83.5dB(B)/2.83V/m. However, in a typical room the speaker's quasi-line-source vertical dispersion should make it sound a little louder than might otherwise be expected. (The in-room loudness of a true...
www.stereophile.com
Sidebar 3: Measurements On the face of it, the MG-20 is not very sensitive, 2.83V raising an estimated 80.5dB at 1m (B-weighted). In practice, however, the speaker's line-source radiation pattern will partially compensate for this. (The level of a true line-source speaker doesn't fall off as...
www.stereophile.com
None of these models are considered trivial loads, but also none are hard.
Back to your Klipsch. They also are not extremely difficult to drive, but do have a large negative phase angle at 80Hz and some large swings. The difference is they are rather sensitive, so not likely you will run out of power with any decent amp, unless you need to push them to maximum output, which would be dangerous to hearing in most reasonable sized rooms. And I doubt they cause any decent amp to become unstable, your Denon is better than decent.
You have an awesome AVR. I think it is vanishingly unlikely that the B200 will make an audible difference. If it does, the most likely is it's exceptional noise floor will produce less audible hiss during silent passages. The Klipsch are very sensitive so noise in your electronics can potentially be audible during silent spaces. But the Denon is a good performer, so even that isn't likely a problem.
The Denon will also help if you use the PEQ to tame your room's modal behavior, and even to reduce the treble since they seem slightly hot from the
Stereophile measurements.
I hope my observations help.