TheGiantHogweed
Newly Enlightened
- Joined
- Sep 11, 2015
- Messages
- 35
I am having a lot of difficulty in getting what seems a good quality 12v power supply. I wondered weather to ask here or on headfi as I also use them for audio stuff too.
The problem I have is that I am incredibly sensitive to sound. I find the high pitched buzz emitted from a lot of power supplies almost unbearable even if it is pretty quiet. The issue with using them with LEDs is that dimming only makes the noise change and generally get louder. I have bought many from different places, some of which turn out to be suitable if the LEDs are used on full power, but produce a horrible noise when dimmed. It also brings the noise of the power supply to the dimmer itself, making it even harder to hide the noise. Interesting thing is that some old 12v power supplies i had lying around seem to be really good quality. For example an LG 12v 2A power supply that came with an optical drive for a PC, this one makes no audible noise what so ever, even when dimming. I tend to find that the sort with an mains lead to the transformer tend to be better built and emit less noise, but that is not always the case. All of the good ones I have are what happened to not be needed as the device they came with either no longer worked or was not used. As I find is the case with most things built these days including power supplies, they used to be built better. This LG one will probably be nearly 15 years old.
Out of all the ones i have bought being over 3a in the last few years have been noisy in some way. Either the whole time or when the LEDs are dimmed.
https://www.amazon.co.uk/gp/product/B071VW5R3P/
https://www.ebay.co.uk/itm/DC-12V-1...=174061254712e4ce5b151f68419ca2215588c9688679
I bought a couple from ebay and probably should have known better. I usually notice suspicious things in pictures, but i didn't until I received it and found out that the earth pin was sleeved. That surprised me as they are selling something that is illegal to ship from this country. Anyway, I tried the transformers with my own IEC leads, and they both did the job, but were so noisy. I'm going to request a refund for both anyway as they shouldn't be sold.
So far, going cheap or expensive, I can't seem to find any new 12v power supplies that don't make any audible noise. I just have to keep looking around and using ones from dead equipment that used them as branded ones (that are not sold separately) seem far better.
I have the same problem with 12v audio amplifiers. The amount of noise most power supplies send to the speakers is awful, but it amazes me how good a dirt cheap amplifier can sound if you use a good supply like my LG one.
Any advice on where to buy good 12v power supplies would be appreciated, Thanks.
The problem I have is that I am incredibly sensitive to sound. I find the high pitched buzz emitted from a lot of power supplies almost unbearable even if it is pretty quiet. The issue with using them with LEDs is that dimming only makes the noise change and generally get louder. I have bought many from different places, some of which turn out to be suitable if the LEDs are used on full power, but produce a horrible noise when dimmed. It also brings the noise of the power supply to the dimmer itself, making it even harder to hide the noise. Interesting thing is that some old 12v power supplies i had lying around seem to be really good quality. For example an LG 12v 2A power supply that came with an optical drive for a PC, this one makes no audible noise what so ever, even when dimming. I tend to find that the sort with an mains lead to the transformer tend to be better built and emit less noise, but that is not always the case. All of the good ones I have are what happened to not be needed as the device they came with either no longer worked or was not used. As I find is the case with most things built these days including power supplies, they used to be built better. This LG one will probably be nearly 15 years old.
Out of all the ones i have bought being over 3a in the last few years have been noisy in some way. Either the whole time or when the LEDs are dimmed.
https://www.amazon.co.uk/gp/product/B071VW5R3P/
https://www.ebay.co.uk/itm/DC-12V-1...=174061254712e4ce5b151f68419ca2215588c9688679
I bought a couple from ebay and probably should have known better. I usually notice suspicious things in pictures, but i didn't until I received it and found out that the earth pin was sleeved. That surprised me as they are selling something that is illegal to ship from this country. Anyway, I tried the transformers with my own IEC leads, and they both did the job, but were so noisy. I'm going to request a refund for both anyway as they shouldn't be sold.
So far, going cheap or expensive, I can't seem to find any new 12v power supplies that don't make any audible noise. I just have to keep looking around and using ones from dead equipment that used them as branded ones (that are not sold separately) seem far better.
I have the same problem with 12v audio amplifiers. The amount of noise most power supplies send to the speakers is awful, but it amazes me how good a dirt cheap amplifier can sound if you use a good supply like my LG one.
Any advice on where to buy good 12v power supplies would be appreciated, Thanks.