8 Ohms, just like amp manufacturers use. Point is you don't need a special amp feature to see what a lower DF amp would sound like.What assumptions did you use for the speaker, among other things?
8 Ohms, just like amp manufacturers use. Point is you don't need a special amp feature to see what a lower DF amp would sound like.What assumptions did you use for the speaker, among other things?
But... My speakers now are bi-amped by CXR200, maybe C298 would be even a downgrade...
The short paragraph on '7.4.3 Damping factor' is sufficient to understand how complex the theory can be and I think this one is closer to reality:
Link
-> In reality with transient signals, each turn of the voice coil couples individually and proportionately, so the resistance is distributed!
They will most likely sound thinner.Heco Celan Revolution 3. Would it be a good upgrade from Cambridge Audio CXR-200 to NAD C 298?
Your "experience with different amp DFs" appears to be an advertisement for a random amplifier. Again.They will most likely sound thinner.
According to STEREO (a German audio magazine, who have tested the T+A A200) and my experience with different amp DFs:
All loudspeakers, from large-volume bass monsters to compact shelf speakers or speakers with low chassis mass, should now be able to exploit their full potential. DF switching is done by means of a push button.
Your "experience with different amp DFs" appears to be an advertisement for a random amplifier. Again.
Well, it a sin for T+A allowing users to play with holy audiophile parameters ) Like an EQ or color scheme presets of monitorsThey will most likely sound thinner.
According to STEREO (a German audio magazine, who have tested the T+A A200) and my experience with different amp DFs:
All loudspeakers, from large-volume bass monsters to compact shelf speakers or speakers with low chassis mass, should now be able to exploit their full potential. DF switching is done by means of a push button.
Stereophile measured 1% THD+N power at 255 and 275 into 8 ohms for the M33 and M298 respectively and 460 and 510 into 4 ohms, respectively. The knees of the curves are also at higher output powers for the C298. Regardless of how NAD rated them the C298 measures more power out at 1%. Perhaps the ambient temp inside the M33 case is a good bit higher due to all of the digital processing that is not present in the C298. Otherwise their internal arrangement is similar as are the heat sinks attached to the bottom plates of the Purify modules.Very welcomed addition with good features at a fairly affordable price, considering this is from a well established brand. Look, however, is... nothing to talk about, really.
Trying to understand why it is rated lower than the M33 (200W/8Ω, 400W/4Ω) using the same modules (assuming there's only one Purifi ET out there). Could be downpowered by the SMPS, or the ajsutable gain too low at maximum? I don't know.
Yes! That’s bothering me… in my mind lowering gain should lower THD, not add!?I very much doubt there are audible differences, but check these measurements:
SoundStageNetwork.com | SoundStage.com - NAD C 298 Stereo Amplifier Measurements
www.soundstagenetwork.com
Variable gain added a bit of THD and channel imabalance on the C298. I’m going to guess the switch to a three position switch on the M23 cleans up all of that. With your speakers I can’t imagine you wouldn’t be on the lowest setting in either case.
Are you referring to this part?Yes! That’s bothering me… in my mind lowering gain should lower THD, not add!?
If so, the difference is completely insignificant. Also, that's THD+N so could just be thermal noise from the pot resistance; that .0004% is -108dB at only 10W, which is very close to the noise floor of the device.In fixed mode, THD+N (A-weighted) at 10W into 8 ohms measured approximately 0.0004%, while variable mode yielded 0.0006%
NAD announced the M33 last year as a suitable upgrade for the M33:I don’t see much use in the M23 over the C298 for most people
Yes! That’s bothering me… in my mind lowering gain should lower THD, not add!?
But how does the whole thing look after a few years later, when e.g. a mechanical poti has aged?True, except when you do it with a "variable" feature you have to add something and that "something" will add distortions and/or noise. The difference is only 0.0002% that is negligible in this case.
But how does the whole thing look after a few years later, when e.g. a mechanical poti has aged?