It will run cooler then, that's a fact ...I want a 3HP amp, maybe shoot some N2O in one of these amps so we can reach those levels of power with good distortion figures.
It will run cooler then, that's a fact ...I want a 3HP amp, maybe shoot some N2O in one of these amps so we can reach those levels of power with good distortion figures.
There is trim potentiometer in the back to set the input sensitivity. At first I left this in the default middle setting but that showed fair amount of channel mistmatch. So I set it to max and the two equalled out.
Seems like it was just discontinued as I checked the price yesterday and it was being sold for $300 or so from Amazon. The suggested replacement by Amazon is lower power (75 versus 100 watts for M-282) but is also cheaper at $210.
4 Ohm for an amplifier not really built for it is not going to work well. You will quickly get much worse distortion figures.I wonder if using a 4 ohm load increased the power requirements on the amp and led to more heat?
For really good results for a 100 watt integrated amplifier, see this test of the Yamaha AS 700: https://www.avhub.com.au/product-reviews/hi-fi/yamaha-a-s700-integrated-amplifier-393552 Its almost identical successor, the AS 701, sports digital inputs as well (optical and coaxial, the AS 801 has an additional usb input) and sells for 549 euro in the
YAMAHA A-S801
- Rated power (1% THD + N, 1 kHz) [W] 8 Ω, 2x 130
- Rated power (1% THD + N, 1 kHz) [W] 4 Ω, 2x 132
- Sensitivity (for maximum power) [V] 1x 0.22
- Signal / noise ratio (A-weighted filter, with reference to 1W) [dB] 83
- Dynamics [dB] 104
- Damping factor (relative to 4 Ω) 94
Once pushed to tune of 150 watts, the Onkyo distortion rises up across the board which is not surprising. But look at the huge rise in distortion as source frequencies got lower than 50 Hz. The inadequate power supply has more of a problem with long cycles of low frequencies.
You may have discovered a gold mine of a website! I'm hooked!!!!
That looks a lot as if bias on one channel (at least) is wrong, or busted.
I was searching for stereo Amp/DAC reviews in the last 2-3 days,like Marantz PM7005.That is the first site with measurements.
Testing amplifiers at 4 ohms only, is much like testing DACs at 44.1 only, it doesn't give the full picture.
S.
I want a 3HP amp, maybe shoot some N2O in
I find the Powercube to be a useful 'quick and dirty' visual representation of an amplifier's performance envelope, but only as an addition to the various graphs of power vs frequency, distortion vs power, distortion vs frequency, as well as distortion FFTs and residuals, frequency response into different loads and levels, IMD figures, noise etc etc. In other words, there is no one measure that characterises an amplifier, there are lots of separate measurements needed for that. That's why purely analogue instruments like the Lindos LA100 system have automated sequences as doing this sort of thing manually is pretty tedious.The best "picture" of amp output performance that I've seen is the 'powercube' measurement box from Swedish company, Audiograph, that integrates into the Audio Precision instrument. It measures variable loads, both capacitive and inductive. But is quite expensive (I've heard the device costs 20 large or so, but am not sure). You get a graphic display of amplifier power into various loads. I've attached a pic. If I had a ton of spare dollars, I'd buy one for amirm. But I don't. If it's the thought that counts, then he's got that going for him! LOL
View attachment 20219
I find the Powercube to be a useful 'quick and dirty' visual representation of an amplifier's performance envelope, but only as an addition to the various graphs of power vs frequency, distortion vs power, distortion vs frequency, as well as distortion FFTs and residuals, frequency response into different loads and levels, IMD figures, noise etc etc. In other words, there is no one measure that characterises an amplifier, there are lots of separate measurements needed for that.
S