Search results

The Micro Audio SMPS2K runs cooler than the Hypex SMPS3KA700 without any load. I think it would be a real winner regardless of Hypex or Purified amplifier modules.

Is there an on-line manual for the boXem A 4216 series amplifiers?

Fans will be used and an opening is available. The cabinet is a Salamander Synergy Systems with ventilated front door. Generally I allow for 6-8” above amps & processors. Fans are from AC Infinity.

The temperatures are very reasonable. I want to stress again the measurements are on the surface of each module & PS. The case itself is quite cool. In comparison, the case of multi-channel HT audio-video processors get hotter. The reason for my measurements are not to denigrate any...

I don't think it's a difficult design challenge. It comes down to case size, heat sink capacity and proper ventilation. I saw one DIY amp here on ASR that had 3/8" thick copper plates on each of 8 modules, two case fans, two PSs and a large chassis. It looked like a really nice build.

I'll get around to actually installing it at the end of this week or when I get some time as I have to travel out of town on business. The amp itself looks like a good solid build, the only negatives I can give on initial observation is that there is no LED on the front panel indicating the...

Some initial temperatures of the boXem A 4216/E4 using a an infrared thermometer with laser pointer. 4-channel Purifi 1E6525SA module based amplifier. 1. No load and turned on idle for >1 hour. 2. Ambient air temp around 76F (24.4C) with low humidity. 3. The top of the chassis is 89F (31.6C)...

Wow, PS exploded? It should have shut down. That would be a fire hazard. A 5 year old would be the previous NC500 modules? The current NCx500 is from 2022 or 23?

Thanks. I would assume that this means on the Hypex based modules, one would have to use better heat sinks to mount them on. That is if heat dissipation is an issue during operation. I'll make some measurements with an infrared thermometer once I get my Purifi based amp and compare them to my...

Are the NCx500 Hypex modules considerably less efficient than the Purifi 1ET6525SA modules? I thought the difference was a couple of percentage points. Purifi being 94% efficient vs. 92-93% for the Hypex? Or is this due to the implementation of the power supply rail voltage selection?

Depends on your requirements of frequency range, noise, dynamic range and required gain. They can become difficult. Ask NG or Raytheon when they do radar or EW amplifier designs for aircraft and ships. Those analog circuits can put noise on digital circuits manifesting in strange results.

No. Eagle. Eventually Altium in a couple of years.

That's impressive. For the rest of us humans it takes at least 3-4 tries.

The Purifi modules are being mass produced for many different implementations. If you're building production amps, you want to get a reliable input gain stage design which can go into production. This is non trivial, but there are a fair amount of DIY implementations that look good and you can...

Obviously the Purify module, but implementation will vary between DIY and production. If you can get the required output power, gain and a SINAD > 100 dB with an additional 6-9 dB requires a bit of work.

Designing an input gain stage with the constraints of low noise and maintaining SFDR isn't trivial - given the amp's final output power requirements with a SINAD exceeding 100 dB. That too given the price of these amps in the range of $500-$800/channel.

The NCx500 with the Micro Audio SMPS2K is a beast. It just keeps getting louder without distortion. My wife cranked it up to very high SPLs Saturday night for over 3 hours. No fatigue in listening.

NCx500 3ch Amplifier is an absolute joy. It really opens up the Revel Be speakers. Could another Hypex NCx500 module be added without overloading the Micro Audio SMPS2K power supply?

I wish I had seen this post in this thread earlier. Can something like this be done using the Micro Audio SMPS2K power supplies?

Comparison with the Hypex SMPS3k. Output power with all channels active, overheating, clipping, distortion and so on. That's a nice build! You've got two power supplies, solid copper heat sink on each of the 8 channels with a backplane and a large cooling fan on the side. It must weigh close...