Recent content by Matias

I just measured mine using a bathroom scale: 11.0 kg (24.25 lbs) each speaker by itself. How precise it is, your guess is as good as mine. I don't know where @pierre got his number for Spinorama.org though...

Very interesting how this manufacturer of car audio amps not only uses a custom amp co-developed with Purifi using Eigentakt technology, but also TI OPA1612 opamps and ESS ES9039Q2M DAC chip. And Made in Germany too. What a beast of an amp! :oops: No idea on pricing yet, but of course it will...

My oldest Hypex items are the 2 x SMPS1200 and they are still running fine 5 years later.

Power at 1% THD+N 4 ohms, and price.

I am impressed how well @Rja4000 measurement system compared to Amir's APx555! :oops: https://www.audiosciencereview.com/forum/index.php?threads/topping-d50-iii-dac-review-and-measurements.53749/

@janbth and what are your impressions so far?

Or you can have multichannel amplifiers with no linear power supplies (and big toroidal transformers), and instead use smaller SMPS power supplies and higher power class D stages, with lower noise, distortion, weight, heat loss and price.

Klein + Hummel was the German company acquired by Neumann and the same designers kept developing the line. That's why they use the KH prefix to their monitor line. https://de.wikipedia.org/wiki/Klein_und_Hummel

Actually Bruno recommends OPA1656, so not sure why they chose the OPA1612 for the EVAL1...

Buckeye 3 x NCx500. https://www.buckeyeamp.com/shop/amplifiers/hypex/ncx500/3_channel

I own the same modules and opamps so our amps are 99% the same. :)

Excellent work, congrats! And awesome little DAC.

Welcome to ASR. Can you share details of the crossover changes? Also how it measured before the upgrade? Is the change something you did DIY for yourself and can share with others, or do you have commercial interest and will sell the upgrade?

Lots of noise and distortion added, no doubt about it. I just gave an alternative, not that I would use it myself. :)

@Megaken you can buy a class D amp from VTV with an internal tube buffer, if that is what you want. https://vtvamplifier.com/product/vtv-amplifier-custom-vacuum-tube-input-buffer-new/