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For those that have bought an SMPS from connexelectronic, how was the experience? I ask because I placed an order for a 500VA unit 2 weeks ago and it still shows as 'processing' on their site. Aside from the auto-responder when I placed the order, I've heard nothing from them despite sending them a contact email via the form on the site.I did ask for a 32v version of the unit so it's possible that there is some work needed to process the order, but 2 weeks with no contact or feedback starts to get a bit concerning even for a smaller internet vendor.
If you want 60-70VAC that transformer is not correct. That will give you closer to 90VAC with a standard bridge.
You meant to say "DC" in both cases? The power supply requirements for the amplifier boards are in DC volts (i.e. +/- 60VDC to +/- 70VDC). The transformer specifications are in AC volts. After rectification the DC output will be 1.414 X the transformer secondary AC voltage. 60VAC input X 1.414 = ~ 85VDC70VAC input X 1.414 = ~ 99VDC Decide on your target DC voltage then either multiply that by .707 (or divide by 1.414) to determine the proper transformer secondary AC voltage. Example: 65VDC X .707 = 46VAC transformer secondary voltage Steve
So would this be suitable? http://www.antekinc.com/details.php?p=139
You guys are not going o like this.......I bought one of these, sent it back for gain change, upgraded the PS by more than doubling the capacity and did a bypass with high audio quality cap, burned in for over 200 hours and I still thinkg it sounds most lacking. No life, no envolvement. I keep visiting this thread hoping to read that someone has found the magic bullet to make this thing sound like what you guys are whistling.As it is its barely worth what I paid for it
Yes, the 45VAC secondaries would give you ~ 64VDC after rectification by the power supply. I always like to operate components at less than the maximum permitted voltages (but I have also been known to underclock my computers!). ........ Have fun with the build. I know some prefer SMPS power supplies vs traditional linear supplies, but I have not built one of these and can't comment on the difference with the Class D Audio modules. Steve
I have one SDS 258 and run it stereo using +-72vdc from a connex SMPS with classDaudio approval.It runs HOT! I will eventually get a PS with 60-65vdc for longer life.The SMPS generates less heat but more than I expected.I soldered the inputs on to the circuit board for improved sound. Biggest improvement was getting rid of the gain control and soldering in vishays I had used in other projects. Those pots suck.Sounds clean and clear, better than the icepower 1000 I was using. Great value.It'll end up on the back of a speaker bi amping it and I'll get another later for the other channel.
What value resistors did you use?
You want the SDS-254 unit that can handle lower ohm speakers. Really for your setup you need SDS-254 run bridged. I'd also consider the DPS-500-s SMPS from audio power. Only then will the IR PWM really perform on those Maggies!!!
