I'm wondering which power supply to use with this amp: https://www.allo.com/sparky/volt-plus-d-amp.html
I have plenty of used laptop power supply around, they are probably very noisy,
If I understand correctly the amp's circuit has one of these to clean the noise somewhat:
https://www.allo.com/sparky/capacitance-multiplier.html
I suppose the best would be to still use a decent power supply, but I'm wondering how much noise will be introduced by using an old laptop power supply.
Potentialy stupid question: would adding another capacitance multiplier, on top of the one on the board help ?
I have plenty of used laptop power supply around, they are probably very noisy,
If I understand correctly the amp's circuit has one of these to clean the noise somewhat:
https://www.allo.com/sparky/capacitance-multiplier.html
I suppose the best would be to still use a decent power supply, but I'm wondering how much noise will be introduced by using an old laptop power supply.
Potentialy stupid question: would adding another capacitance multiplier, on top of the one on the board help ?
It depends on the laptop power supply switching frequency, if it is in the audio spectrum or not. The good news is that kHz noise frequency can be filtered with an LC filter, with inductance and capacitors values lower than the ones required for 60Hz ripple from a classic power supply with a transformer. If they laying around you why don't you just try it and see.
The laptop power supply voltage is usually is around 20V (less than 23V recommended on the website) and with that, you will probably get less than 60W with one channel driven. To get 2 x 60W you need like a 23V, 150W output (or more) laptop power supply.
Changing the subject, in my humble opinion I think you might be misguided: unless you have space constraints or power consumption restraints, like this will be powered by a battery in a car (which I guess you don't because you want to use a laptop power supply) I think that you would be better buying a used receiver (on eBay or Craig's list for example) at the half the price I see at the link you provided. You would no longer have to worry about the power supply, you get an incorporated FM tuner maybe a 5.1 receiver with plenty of power, usually 80-100W (more than 60W) per channel, maybe with a remote...
And if you use all the money $129 +$15 you plan to spend on allo, you can get a nice used receiver with HDMI and all the above.
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The amp's purpose will be to power an instrument amp.
The reason I chose this amp, is that it had a nice objective review by Amir on audiosciencereview, but also because it can be powered by a battery as well as AC, provided I add a power supply.
By receiver, do you mean radio (AM/FM) receiver ?
Larger laptop supplies work great for the tpa amps, the 19v is about perfect really.
Was comical and frustrating watching those on that other site try and figure out what the allo actually was, there is more information about that on Allo’s website even.
Was comical and frustrating watching those on that other site try and figure out what the allo actually was, there is more information about that on Allo’s website even.
One thing about a laptop power supply, is that they do have to meet "certs" in order to be sold as a commercial product. Chances are, if from a reputable manufacturer / OEM, that some attention was paid to the EMI coming out of the thing, on top of or along with the DC.
You could always search ebay and come up with a full linear;
You could always search ebay and come up with a full linear;
Power-One F24-12-A Industrial 24V 12A Linear Open-Frame Power Supply Unit
That's going to do it. You can adjust down to 20V easily. I use something similar on my class D amps, only 6A. Industrial means 24/7 operation at full load, connected to that amplifier would be a walk in the park for it. There's a second one for sale at ~$50...Buy a receiver, rig it for battery.
Meanwell are known for good quality SMPS. a laptop supply may or may not be suitable.
Meanwell are known for good quality SMPS. a laptop supply may or may not be suitable.
Yes, I didn't want to put specific links here because they might not be valid for people reading this forum later, but here it is a general one; unfortunately for this one, you have to do a lot of selective browsing as it contains a lot of other things and you should probably scroll over the ones with the total (price + shipping) under $25:
https://www.ebay.com/sch/i.html?_fr...=recall_filtering&rt=nc&LH_ItemCondition=3000and attached a picture with a few of the deals available at the time of this posting. I just took the first ones that I saw, there are others; with a little time investment and research, you can find a nice one.
If working on a battery is a requirement, you can also check the class D amplifiers, like for example https://www.ebay.com/sch/i.html?_fr...itleDesc=0&_odkw=stereo+d+amplifier&_osacat=0 i
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For an instrument amplifier the volt + would be more than enough. The one you linked to has many upgrades for better stereo (2 channel) reproduction. With a mono input those features may not be as useful. I have the Volt + running on a beefy (4.5 amp) 12V supply and it sounds very good. If the other one is what you want buy it, but look at the volt + as it is much less expensive.
You mean much more expensive (like the volt is 4 times more expensive):
Volt Plus D Amplifier : $129 price + $59.40 shipping = $188.40 total for an amplifier with 2 channels, 60W each channel (power supply not included)
Sony STR DE545 5.1 Receiver: $44.99 +Free Shipping = $44.99 total for an amplifier with 5 channels, 100W each channel
Prices based on the link TroubadourZ provided compared with eBay item number 403391036542 (see attached picture)
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My Volt + was 39 dollars. Not sure you are talking about the right product or helping the OP. He is looking for a device that is not like the device you are recommending. Your price is for the volt plus double. I mentioned the volt plus because it is 39 dollars and can be portable. The reciever you recommend is not portable, is used, and may not even work. Please try to be helpful.