In an effort to avoid playing too much with 240v would a constant current LED driver like this work acceptably with Pass or similar class A amps? One per channel
HLG-100H-24 is a 96W 24V 4A Single Output LED Lighting Power Supply | Power Supplies Online
HLG-100H-24 is a 96W 24V 4A Single Output LED Lighting Power Supply | Power Supplies Online
Dear JRKO,
In general, you need constant voltage supplies for amplifiers (including class A). A constant current supply would require some additional hardware and control techniques to be added to it before being used to power an amplifier. Therefore, in my opinion, the applicability of an LED driver depends on the design skills of the user.
All the best.
In general, you need constant voltage supplies for amplifiers (including class A). A constant current supply would require some additional hardware and control techniques to be added to it before being used to power an amplifier. Therefore, in my opinion, the applicability of an LED driver depends on the design skills of the user.
All the best.
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Constant voltage? Sure, they would work really well, especially with Class A amplifiers that have heavy quiescent loading characteristics. Do make sure that the supply is well filtered, add extra filters if necessary.
The link you gave IS steady-voltage up to a quite large current.
I knew a guy used the hundreds-volts versions to power a stage-shaking tube amp for an alternative- stoner- hard- alternative- metal band. I warned him it could collapse on heavy load, but he did not get back to me with problems.
I knew a guy used the hundreds-volts versions to power a stage-shaking tube amp for an alternative- stoner- hard- alternative- metal band. I warned him it could collapse on heavy load, but he did not get back to me with problems.
as a single supply for both channels how do you think this would stand up?
RSP-320-27 is a 321.3W 27V 11.9A Single Output Enclosed Power Supply with 88 - 264VAC input voltage from Power Supplies Online | Power Supplies Online
Ill be using a capmx per channel to clean things up a touch,
RSP-320-27 is a 321.3W 27V 11.9A Single Output Enclosed Power Supply with 88 - 264VAC input voltage from Power Supplies Online | Power Supplies Online
Ill be using a capmx per channel to clean things up a touch,
Now I’m confused
There’s a +V terminal, a -V terminal output and earth, Live & Neutral input
So the -V doesn’t make a +/- PS?
There’s a +V terminal, a -V terminal output and earth, Live & Neutral input
So the -V doesn’t make a +/- PS?
No, sorry.
And the next question should be:
Can I connect two of those supplies together to make a bi-polar supply?
A: In theory, but since the datasheet does not mention connecting it that way, then I don't know. Hopefully somebody can explain this better....
And the next question should be:
Can I connect two of those supplies together to make a bi-polar supply?
A: In theory, but since the datasheet does not mention connecting it that way, then I don't know. Hopefully somebody can explain this better....
Don't try that, either find a 48V DC SMPS, common enough, and split it using a false ground.
Or build one yourself.
Constant current supplies are intended for steady loads, and amp loads vary with the music.
The LM317 could be used as constant voltage or constant current, read the data sheet.
Putting two SMPS on the same output will result in harmonics as the switching frequencies will not match, apart from that they will go nuts matching load.
Have fun.
Or build one yourself.
Constant current supplies are intended for steady loads, and amp loads vary with the music.
The LM317 could be used as constant voltage or constant current, read the data sheet.
Putting two SMPS on the same output will result in harmonics as the switching frequencies will not match, apart from that they will go nuts matching load.
Have fun.
If I were you, I would prefer two regulated power supplies to a single +/- supply, as the loading on the + and - voltages are never equal and it always helps if they're separately regulated. It is worth noting that this imbalance is aggravated during playback of lower frequencies (bass).
That one appears to have the proper positive, gnd, and negative output, but it doesn't list the output current or the ripple. You could get the 30V version and filter it some more.
With two power supplies, there would be as many transformers, controllers and feedback loops as there are voltages i.e. one each for the + and - outputs. And since the two units operate independently, both these voltages would be correctly maintained at their nominal values, irrespective of any differences in loading.
On the other hand, an SMPS with +/- outputs feeds back information from:
1) Only one of its outputs (usually the positive)
OR
2) Across the series combination of both outputs i.e. a +/- 30V unit would actually be regulating the net voltage that appears across the far ends of the dual supply (equal to 60V), while the midpoint (GND), which remains unregulated, is at the mercy of the transformer winding ratio (only).
Thus using two separate units in series tends to give a better (stiffer) dual power supply when compared to one with dual outputs, especially in applications involving heavy load currents such as Class A amplifiers.
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mpmarino knows something....
https://www.diyaudio.com/forums/swa...vi-lul-iu-28v-smps-class-amp.html#post6732298
https://www.diyaudio.com/forums/swa...vi-lul-iu-28v-smps-class-amp.html#post6732298
You could easily utilise 2 Meanwell SMPS that come with the ACA kit. They are fantastic, will not sag the voltage even if loaded at 4A constant current. I actually installed them inside the ACA and used point-to-point copper/silver ribbons.... just for fun.
Have a look at the photos. it is IMPORTANT to lift the ground pin from common (returns) on both SMPS. Once lifted, you can connect them in series and have:
1. +24V
2. zero (this is a connection between two SMPS, -24V of the first SMPS and +24V of the second SMPS)
3. and then what's left is -24V of the second SMPS.
The above will give you +24V zero -24V
Once again, NOTE: the 2. above can be done only if you lift the mains ground from -24V tabs on both SMPS.
I tried using them (Meanwells) inside my Aleph J... the sound was great. They just need a bit of attention with decoupling at high frequencies... but even without that filtering, the sound was great.
Attachments
JRKO, I would really go with the Connex SMPS300REh power supply. Custom output of +-24V will be only 7.50$ extra.
As for messing with 240V, this is as easy as it can get. Use fully isolated 4.8 - 6.3 mm crimping spades and thick cables between a panel mounted IEC C14 connector (with a fuse!) and the power supply.
From the picture on Connex homepage it seems that the earth connector is connected to the base plate. This will reduce the need for a separate chassi ground cable.
In fact, I'm about to order one for my F6 which I will put into a proper cabinet in the coming weeks.
As for messing with 240V, this is as easy as it can get. Use fully isolated 4.8 - 6.3 mm crimping spades and thick cables between a panel mounted IEC C14 connector (with a fuse!) and the power supply.
From the picture on Connex homepage it seems that the earth connector is connected to the base plate. This will reduce the need for a separate chassi ground cable.
In fact, I'm about to order one for my F6 which I will put into a proper cabinet in the coming weeks.
Just found this which seems to be a true +/- supply. Please tell me it is.
https://www.audiophonics.fr/en/smps-power-supply/switching-power-supply-module-700w-30v-p-15592.html
https://www.audiophonics.fr/en/smps-power-supply/switching-power-supply-module-700w-30v-p-15592.html