-
WANTED: Happy members who like to discuss audio and other topics related to our interest. Desire to learn and share knowledge of science required. There are many reviews of audio hardware and expert members to help answer your questions. Click here to have your audio equipment measured for free!
Review and Measurements of Purifi 1ET400A Amplifier
- Thread starter amirm
- Start date
Read the NC400 thread to find information to the contrary.
From the SMPS600 datasheet.
As I said, hand-waving... I didn't feel it worthwhile to get into phase angles for charge/discharge and all that jazz. For the level the OP was asking, order-of magnitude seemed good enough to get across the concept. I.e. charge 100x faster, get away with 1/100 the capacitor value, for equivalent current flow.
You are certainly right that the time that the caps in a conventional linear supply needs to hold between recharges is much more. I did not mean to dispute that. Depending how one designs, the rails run at close to peak voltage, so the caps do have to carry the load 8-10 times longer, while sagging/rippling the whole way.
So, with two NC400s, there's higher output with this particular power supply, at 120VAC. I expect that is likely due to 60 vs 50 Hz.
It also says this on Page 10, section 8.1:
- 1x400 @ 4Ohm @ 240VAC @ 1%THD+N @ 1kHz when connected to NC400
- 1x300 @ 4Ohm @ 120VAC @ 1%THD+N @ 1kHz when connected to NC400
https://doc.soundimports.nl/pdf/brands/Hypex/SMPS600N400/pdf_Hypex_SMPS600N400_1.pdf
Last edited:
- Joined
- Oct 29, 2019
- Messages
- 59
- Likes
- 57
I am tri-amping my front speakers and needed 6 channels of NC400. I concluded that 2x stereo boxes with 1x SMPS1200 and 2x NC400 for mid/high range for each speaker plus monoblock for bass each side was the best option in terms of current deliver.
D
Deleted member 5620
Guest
Killingbeans
Major Contributor
I'm guessing: What ever they ask for! 
- Joined
- Oct 29, 2019
- Messages
- 59
- Likes
- 57
Slightly modified VAF i93 MK2 Signatures. Probably unknown outside of Australia. Forgive my poor photos but my room is so dark and has a lot of acoustic curtain (theatre black) so it’s very hard to get decent photos in there.
- Joined
- Oct 29, 2019
- Messages
- 59
- Likes
- 57
All of my amps are 240V too
- Joined
- Oct 29, 2019
- Messages
- 59
- Likes
- 57
The measurements I get from the NC400 and VAFs are astonishing
- Joined
- Oct 29, 2019
- Messages
- 59
- Likes
- 57
I definitely don’t want to hijack this very valuable thread about the Purify amps, so I’ll create another in ‘my system‘ or something.
- Joined
- Oct 29, 2019
- Messages
- 59
- Likes
- 57
Yes I studied those specs, and I believe that my stereo amps with SMPS1200s can draw a maximum of 1500 watts each from the wall, so I had a 32 Amp circuit installed with two 16 amp lines to the front of my room. Currently (pun intended) I’m using one 16A circuit per amp, and four normal 240 wall outlets for my (many) other power amps to avoid any possible current limiting. This may be overkill.240VAC has its advantages with the SMPS1200.
Is there really such a thing in this hobby? It's more a matter of degree... Nice setup
As of today, I heard "Yes, it's a bit delayed, but quite soon!" I still understand that the initial DIY offering will be the OEM evaluation kit, which is two modules, an audio interface board and maybe an interconnect cable or two. Essentially, the guts of what Amir tested in this topic, but without a power supply or case. Note that there could be a couple differences in details from the package tested here, such as on-board banana sockets and a mode switch - like in the third picture in Amir's first post.
SO! If you could buy it today, what would you do with it? Have a case lined up? Any other implementation plans?
I am trying to order a kit for evaluation. Buying might be easier in the future once they have a DIY shop set up.
Similar threads
- Locked
- Locked
