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Post by leonski on Sept 26, 2013 21:50:20 GMT -5
IF Anyone with the XPA-1L has a Kill-A-Watt meter, I'd love to know how much it draws when in 'A' standby and 'AB' standby, too.
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Post by deltadube on Sept 26, 2013 22:04:43 GMT -5
they dont draw much in stand by .. but when on in A mode they are draw alot of power constantly think i hear like 180 watts..
cheers
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Post by Dark Ranger on Sept 26, 2013 22:30:10 GMT -5
IF Anyone with the XPA-1L has a Kill-A-Watt meter, I'd love to know how much it draws when in 'A' standby and 'AB' standby, too. When you say "standby," do you actually mean "idle?" In other words, with the amplifier turned on but with no incoming signal. When the amp is turned off (standby), it uses a very small amount of power like any other electronic component in sleep state. I measured my XPA-1L back in March. Here are the figures from my Kill-A-Watt P4400.01: Class AB mode current (idle): ~1.13 amp, ~140 VA, ~95 watts (123.4 volts) Class A mode current (idle): ~2.34 amp, 288 VA, ~201 watts (123.1 volts) The idle current will change a bit depending on operating temperature. Since I've installed active cooling, the XPA-1L usually pulls about 2.5 amperes in Class A mode (idle). |
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Post by novisnick on Sept 26, 2013 23:04:49 GMT -5
I believe deltadube is correct. 180 idle.
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Post by pedrocols on Sept 26, 2013 23:20:24 GMT -5
I remember Lonnie recommending to switch it to A/B when at idle if you are concern about idle consumption and then switch it back to class A for when you are listening.
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Post by leonski on Sept 27, 2013 0:01:38 GMT -5
Whatever 'state' the amp is in.....it is drawing a pretty good amount of current.
I'll go with Dark's measured data. I've found the Kill-A-Watt meter to be both reasonably accurate and repeatable.
For the 'next' phase of information, it also measures Power Factor which is a function of how reactive (capacitive or inductive) the load is.
Your electric bill at home is billed as KiloWatt Hours = KWA but you use VA which is always higher except for a purely resistive load.
My computer is a bad example having a power factor of about 0.95 drawing just over an amp for about 134 watts and 139va.
That means it is nearly a pure resistive load. My line voltage tonight is about 118vac, about normal.
Big factories are billed a surcharge when the powerfactor drops TOO LOW.
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Post by leonski on Sept 27, 2013 0:05:27 GMT -5
It would appear that the power supply of the XPA-1L has a power factor of about 0.70
It would be an additional expense and add parts and complexity, but maybe a PFC (Power Factor Correction) circuit could be applied so the amp
appears more as a resistor to the power line.
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Post by deltadube on Sept 27, 2013 0:41:40 GMT -5
I believe deltadube is correct. 180 idle. Nick is that your new xpr 1 amps in the pic ? i think there are upside down buddy... i wonder how much power Nick is drawing dawn tonight thought my lights where dimming a bit  mega watt mono blocks eh.. topdognick now! cheers |
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Post by danny01 on Sept 27, 2013 4:18:25 GMT -5
stores.ebay.com/AV-Cabinet-Cooling?_trksid=p2047675.l2563The guy has 12v trigger controlled fans that can be hooked up to the trig out on the amp. I haven't been able to find a 12v fan that can be placed (not rack mounted) on top of an amp. The only thing holding me back from purchasing these is that they lack noise measurements and seem a bit over priced unless the fans are of high quality on par with Noctua fans. I guess its either one of these or DIY.
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Post by leonski on Sept 27, 2013 16:17:32 GMT -5
The Noctua fan should be on any short list. Very quiet and long lasting.
I'd test 'em on less than 12 vdc to perhaps make 'em even quieter.
Maybe a 9vdc Wall Wart?
How elaborate do you want to get? Include a temp switch or even a fan speed control?
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Post by danny01 on Sept 27, 2013 17:09:24 GMT -5
I would be satisfied with fans inaudible at 8 feet, 12v trigger controlled, and constant voltage, no need for a controller if they are inaudible and durable. Seems like building the frames to hold the fans would be the hardest part. But I don't know, I'm a lazy guy so I might just take a chance on those eBay fans.
Sent from my HTC6500LVW using proboards
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Post by novisnick on Sept 27, 2013 17:30:48 GMT -5
I would be satisfied with fans inaudible at 8 feet, 12v trigger controlled, and constant voltage, no need for a controller if they are inaudible and durable. Seems like building the frames to hold the fans would be the hardest part. But I don't know, I'm a lazy guy so I might just take a chance on those eBay fans. Sent from my HTC6500LVW using proboards Beg Emotiva to bring back the C-12 |
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Post by danny01 on Sept 27, 2013 17:44:53 GMT -5
I would be satisfied with fans inaudible at 8 feet, 12v trigger controlled, and constant voltage, no need for a controller if they are inaudible and durable. Seems like building the frames to hold the fans would be the hardest part. But I don't know, I'm a lazy guy so I might just take a chance on those eBay fans. Sent from my HTC6500LVW using proboards Beg Emotiva to bring back the C-12 Yeah they were perfect. Except I only have 2 inches of clearance above each amp (I believe the C12's were 2.25" high), which is why I am looking into forced air. |
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Post by Chuck Elliot on Sept 27, 2013 18:04:40 GMT -5
The Noctua fan should be on any short list. Very quiet and long lasting. I'd test 'em on less than 12 vdc to perhaps make 'em even quieter. Maybe a 9vdc Wall Wart? How elaborate do you want to get? Include a temp switch or even a fan speed control? Most of the Noctua fans come with an inline resistor plug(optional) that runs the fans below 12V. |
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Post by novisnick on Sept 27, 2013 18:06:38 GMT -5
Beg Emotiva to bring back the C-12 Yeah they were perfect. Except I only have 2 inches of clearance above each amp (I believe the C12's were 2.25" high), which is why I am looking into forced air. In my best " Get Smart " voice, " Missed it by just That Much " |
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Post by leonski on Sept 29, 2013 10:45:18 GMT -5
Thanks, Chuck.
Rite you are. And at the lower voltages, the Noctua are QUIET and'll still move a bunch of air.
For my 0.02$, they are THE way to go for quiet cooling in a DIY setup.
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Post by dac0964 on Oct 1, 2013 22:34:16 GMT -5
Ok, I installed this afternoon my XPA-1Ls and as far as the heat goes, it is pretty hot! But not hot enough to burn your hand unless maybe if you touch it for a long time.
My first impression was the sound seems to be lower or softer than the UPA-200 that they replaced. I always listen at -30dB to -28dB on my XDA. But when I hooked up the XPAs I had to crank it up to -26dB to get the same approximate loudness of the -30dB before. Also, I initially could not hear the difference (SQ-wise) with the UPA-200. As the amp heated up a bit, I think I was able to pick up the improvement but can't say it is a night and day difference. Hopefully it is money well spent.
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Post by novisnick on Oct 1, 2013 23:02:39 GMT -5
Hi dac0964,
Are your 1Ls brand new or restocks? When I got mine there was a period of , ok I'm going to say it, break-in. There was heating and cooling cycles that made creeping sounds from the units. This is normal. After time the -1Ls made a noticeable difference in the caricturistics that are its won.I liked the sound of these amps.
Further I believe the numbers on any dial are just a reference point and not a significant indicator of anything. Enjoy your very good investment!
Of anything . IMHO
Nick
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Post by dac0964 on Oct 1, 2013 23:17:02 GMT -5
Hi dac0964, Are your 1Ls brand new or restocks? When I got mine there was a period of , ok I'm going to say it, break-in. There was heating and cooling cycles that made creeping sounds from the units. This is normal. After time the -1Ls made a noticeable difference in the caricturistics that are its won.I liked the sound of these amps. Further I believe the numbers on any dial are just a reference point and not a significant indicator enjoy a very good investment! Of anything . IMHO Nick Hi Nick, they are re-stocks. Got them from last week's warehouse sale. So there shouldn't be a need for break-in. There was no creeping sounds though on the units. |
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Post by leonski on Oct 2, 2013 19:32:54 GMT -5
I believe the 'gain' of the 1L is lower than many other EMO amps...that would account for the higher vol level setting for the same perceived loudness.
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