some additional data on my M8125X from my watt meter.
.58 Power Factor at idle (powered on, no music playing)
60 watts at idle
106 VA at idle
.88 amps at idle (same as listed in previous post)
After the M8125X has been on for a few minutes and warms up, those idle numbers drop a little. .85Amps and 58 watts and 103 VA.
Returned the Monoliths, will search for a more efficient solution. Posted this on AVS:
Re: NC502MP Power Consumption, wondering how it will compare to the NCx series:
NC502MP Datasheet:
3.3 Main SMPS: Idle Losses = 17W (4 of these per 8-channel amp)
3.4 Ncore Amplifier Specifications: Idle Losses = 4.8W per Channel
So when powered on, no audio running (or very low volume), the 8-channel total power consumption is: 17W(4) + 8(4.8W/CH) = 106W
Using a watt meter on two different Monolith M8250X units:
.54 PF
97W at Idle
178VA at Idle
1.48A at Idle
This explains why this amp runs so hot, even when just idling. Basically a 100W light bulb.
In Standby (12V trigger low), draw is negligible, works as expected.
NC252MP Datasheet:
3.3 Main SMPS: Idle Losses = 8.5W (4 of these per 8-channel amp)
3.4 Ncore Amplifier Specifications: Idle Losses = 3.5W per Channel
Idle Power = 8.5(4) + 8(3.5W/CH) = 62W
Comparing to your results:
Some additional data on my M8125X from my watt meter.
.58 Power Factor at idle (powered on, no music playing)
60 watts at idle
106 VA at idle
.88 amps at idle (same as listed in previous post)
These numbers seem to agree pretty well. So how about the NCx500 OEM Datasheet?
NCx500 OEM Datasheet:
Main SMPS: N/A, module requires external power supply
2.4 NCx500 OEM Amplifier Specifications: Idle Losses = 5.3W/CH (typical) --> slightly worse than the NC502MP amplifier stages
So for the Buckeye 3-CH amp, with custom Micro-Audio SMPS, what can we expect overall?
i.e., : Main SMPS Idle Losses + 3(5.3W/CH) =
16W + SMPS Idle Losses = How Much Total Idle Losses?
Not unhappy with the 100W idle consumption of this M8250X 8-channel amp. Pretty much defeats the purpose of bothering with Class-D to improve thermals/efficiency when paired with my Cinema 40. As these sit in a cabinet, running two AC Infinity T9's all the time just adds to the noise/hassle. Looking for a more efficient solution, thinking that the Buckeye 3-CH NCx500 amp plus Cinema 40 for the 4 surrounds may be a better solution. Asked Dylan for some Idle power consumption estimates, awaiting an update.