I would be extremely comfortable.
My wife, however, is cold at 24 C (which is the temp that when I do nothing, I MAY not sweat [but probably will]).
So 23-24 (74 F) is the compromise.
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Bricks List: 36V & 48V Power Supplies (for Fosi, Aiyima etc.)
- Thread starter Zuiko
- Start date
My wife, however, is cold at 24 C (which is the temp that when I do nothing, I MAY not sweat [but probably will]).
So 23-24 (74 F) is the compromise.
Basilderat
Member
Does anyone know where I could source a 52V 6.5A power supply (Topping PA7 Plus)?
Roland68
Major Contributor
You would need to ask a Topping dealer for a replacement power supply, preferably on your continent, or directly from topping.
Alternatively, you could use a high-quality industrial power supply, but you would need to connect cables yourself.
Looking at two different power supplies for a Fosi za3.
Mean Well
HEP-320-36
320 watts - 36 volts - 8.9amps
HEP-320-48
320 watts - 48 volts - 6.7amps
Both 320 watts. Would they both produce the same audio power? Would the 36 volt run cooler?
This is really a more general question of lower voltage and more amps or higher voltage with less amps.
Mean Well
HEP-320-36
320 watts - 36 volts - 8.9amps
HEP-320-48
320 watts - 48 volts - 6.7amps
Both 320 watts. Would they both produce the same audio power? Would the 36 volt run cooler?
This is really a more general question of lower voltage and more amps or higher voltage with less amps.
The 48 V power supply will give you more power (a little less than twice), at least for loads at >4 Ω. Per the amplifier chip datasheet from TI, with 48 V power supply, the max power outputs (1% THD+N) are ~130 W for 8 Ω and ~230 W for 4 Ω [Edit 2]
With 36 V supply, the max outputs are ~70 W for 8 Ω and 130 W for 4 Ω.
[Edit] For class D amplifiers the output current/power is not limited by the max power supply current, but by the max power supply voltage/power.
The heat generated is a not a strong function of the power supply voltage, and I won't expect a big difference going from 36 V to 48 V.
[Edit 2] Oops. I guess nobody saw my mistake, or those that did were kind enough to just laugh it off and not bother to point it out. This is a stereo amp and the max power output wattage from TI are for 1 channel. The mistake does not change the conclusion that the 48 V power supply will give higher max output than the 36 V. Just that the 48 V 320 W power supply is insufficient to provide continuous max output the amp chip is capable of at 4 Ω. (Whether there are other bottlenecks, such as the (in)sufficiency of heat management, to limit the max continuous output to below the chip's capabilities, is a separate question.)
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Roland68
Major Contributor
I would advise against using HEP power supplies for audio amplifiers.
Firstly, these power supplies are specifically encapsulated for outdoor use and harsh environments, which can result in slightly higher temperatures. Secondly, they are industrial power supplies designed for a more consistent current draw and load.
The HRP series is much better suited; I've already written about this in another thread.
Mean Well HRP
yo!
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I used some LRS-350-N2-48 for PBTL amping (2 Ohm). Not sure about theroretical differs vs. the HRP series, but I'm very happy with the result and would choose them again without hesitation.
I adjusted them to 44V, a little less stress for the parts, a little cooler running, still loads of power.
I adjusted them to 44V, a little less stress for the parts, a little cooler running, still loads of power.
I have tried all of these power supplies and can't here any obvious difference in quality of sound or dynamic range. They all sound really good.
I do like the idea of sealed power supplies if they might end up lying on the floor behind a stereo rack getting covered in hair and dust...
Mean well HLG-320H-48 48v DC Power Supply (sealed)
Mean Well SDR-480-48 Power Supply
Mean Well SP-500-48 Power Supply 48VAC @10A
Mean Well DRP-240-48 Power Supply
Roland68
Major Contributor
The LRS series is good, proven, and affordable with an excellent price/performance ratio. I would always prefer something like that to a "brick."
The LRS N2 series also features technology for short-term 5-second overloads of up to 200%. I don't think there's an audible difference compared to the HRP series.
The difference compared to the HRP series is the improved efficiency, slightly cheaper construction, and shorter warranty period.
But that's complaining at a very high level. The LRS and the newer LRS N2 are years of development with very rigorous stress tests and inspections and a long service life.
yo!
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Correcto mundo. I did some setups with 'gan' bricks for testing, I was not convinced about the delivered power. Specially the 5A bricks were very thin sounding in fullrange setup, even for minor sound levels there was simply not enough current delivered for lower frequencies.
5A 'GAN' marketing gimmick vs. same priced LRS350N2 are two total different worlds!
I noticed this commercial amp using a meanwell supply
www.audiophonique.com
Looks like a tidy build, I do not recognize the amp modules but I would conjecture they are tpa3255 based
POWER AMPLIFIER 300D | Audio Phonique | High Performance Audio Products
www.audiophonique.com
Looks like a tidy build, I do not recognize the amp modules but I would conjecture they are tpa3255 based
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Roland68
Major Contributor
That's very clever. The SE series may be affordable, but it's significantly more trustworthy than any nameless SMPS or bricks.I noticed this commercial amp using a meanwwll supply
POWER AMPLIFIER 300D | Audio Phonique | High Performance Audio Products
Looks like a tidy build, I do not recognize the amp modules but I would conjecture they are tpa3255 based
The power supply has a sealed housing; Mean Well has thoroughly tested it and already taken care of all the declarations of conformity and certifications.
Do you know the price of the Audio Phonique Classic Line 300D Stereo Power Amplifier?
Looks like it is 4999 EUR ex VAT
More efficient and smaller isn't "buzz" though, it an actual real world advantage.
Roland68
Major Contributor
Wow, so almost €6,000? That's quite something.
Considering that PA5 II, 3E Audio, Sylph Audio, XRK Audio, etc., already represent the end of the line in terms of TPA325x amplifier development, that's a bit of an exaggeration.
That's probably two TPA3255s in mono mode, which is nothing other than a 3E Audio A7. It would cost around €500 with the same power supply.
I'd love to see an official review of the Audio Phonique Classic Line 300D, preferably here on ASR.
somebodyelse
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For something I pack regularly like a phone or laptop charger the premium for 'slightly smaller' might be worth it. For a static power brick I don't see the advantage. Similarly on efficiency - the benefit is probably at the upper end of output power rather than a fraction of it. For phone and laptop chargers that spend a lot of time near max output it may pay for itself, but for audio which spends most of its 'on' time at low but above standby levels it probably won't. Unless you're powering a Class A amp, but if you're doing that you obviously don't care about efficiency anyway.
These bricks are enormous and I already barely have room in the cable gutter underneath my desk. Halving the size is an enormous boon.
