Found this in a review of the device -
"This is the reply from Sound Devices:
Looks like you did NO research before posting this review. The Superlux is an almost identical copy of our HX-3, a product we designed and make here in Wisconsin. It is indeed a copyright violation of our design, down to the traces on the circuit board and text in our user guide. We introduced the HX-3 in 2001 and have been continuously shipping it since then. We focus on the production and broadcast markets, a world that looks so far from your focus.
You can certainly quote me above, and I recommend you get a quote from Superlux, as well. I’d love to see their response.
Sound Devices, LLC"
The review is at Superlux HA3D Amplifier | Headfonia
- being an owner of the SD version, I'm taken aback at how much of a clone it is now that I see the pictures in the review. It's a blatant ripoff.
However - when I bought the SD version I did so in a rush to fulfil a particular urgent requirement and only the SD device was readily available at the time. Ever since I've kicked myself for buying such an expensive device when it's hard to point to a cost benefit. I guess Superlux are selling it at a more proportionate price because they didn't have to do the R&D at the outset, but none the less, I can't help feeling that their pricing is more aligned to what such a device is really worth in many people's kit bag.