New Purifi 9040 now out on the Purifi Web site!

[goryu]

Those Purifi modules are pricy but I'd hardly qualify $50 as "A lot more expensive." I'd go DIY and get what you want.

I think you'll find the Modu cases less expensive than Ghent and at least as nice.

Martin

I would hardly qualify the diy cost as half of retail. There is also the time factor and the loss of the variable gain and auto off.

 

[Koeitje]

Agree but they may reconsider this for a 16A one:

View attachment 368617

The 10A one used is just barely enough for the two PSUs used and some headroom never hurts.
(yes,I'm talking about the extreme case one will use it to it's full potential)

I don't get it. You mean the socket? How do you know its not already rated for the full 230V/16A

 

[Sokel]

I don't get it. You mean the socket? How do you know its not already rated for the full 230V/16A

10A



16A

You can tell them apart from the orientation of the pins.

 

[songOVERsound]

I like to put my bare feet on top of my A/B parasound 23. Even in the summer time, the warmth feels nice and helps with blood flow

 

[Koeitje]

View attachment 374386
10A


View attachment 374388
16A

You can tell them apart from the orientation of the pins.

I looked it up, but the top one is still rated for 2500W (250V 10A) according to IEC 60320. Should be plenty, but can't hurt I guess. 2000W PC PSU's also use the bottom connector (it will pull more than 2000W, because it needs to provide 2000W), then again the loads on that will be consistently higher than what you would expect from an audio amplifier. Besides, remember that these Purifi amplifiers aren't rated for continuous power output. Basically the continuous output is thermally limited and I've never seen a home audio amplifier with enough fans to cool 2000W+. The amplifier will go into thermal protection LOOOOOOOOOOONG before the plug gives out.

 

[Sokel]

I looked it up, but the top one is still rated for 2500W (250V 10A) according to IEC 60320. Should be plenty, but can't hurt I guess. 2000W PC PSU's also use the bottom connector (it will pull more than 2000W, because it needs to provide 2000W), then again the loads on that will be consistently higher than what you would expect from an audio amplifier.

Suggestion is upon the PSUs power,each rated for 1350W max,so 2700W but as I said is probably barely adequate for the 10A one.

 

[Kim Nordtorp Madsen]

I looked it up, but the top one is still rated for 2500W (250V 10A) according to IEC 60320. Should be plenty, but can't hurt I guess. 2000W PC PSU's also use the bottom connector (it will pull more than 2000W, because it needs to provide 2000W), then again the loads on that will be consistently higher than what you would expect from an audio amplifier. Besides, remember that these Purifi amplifiers aren't rated for continuous power output. Basically the continuous output is thermally limited and I've never seen a home audio amplifier with enough fans to cool 2000W+. The amplifier will go into thermal protection LOOOOOOOOOOONG before the plug gives out.

A note to continuos rating for the Purifi Amplifiers - they can all run indefinitely - as long as they are cooled adequetely.
The 1ET9040BA have a power efficiency of around 94% at 750W, giving a power loss of 45W. see datasheet figure 12 & 13. With a heatsink of less than 1K/W the fet temperatures can be kept below the shutdown limit of 75degreeC.
The typical power supply used with our amplifiers are not designed for continuous operation - so they will limit what is possible before the amplifier module.

rgds
Kim

 

[Sokel]

A note to continuos rating for the Purifi Amplifiers - they can all run indefinitely - as long as they are cooled adequetely.
The 1ET9040BA have a power efficiency of around 94% at 750W, giving a power loss of 45W. see datasheet figure 12 & 13. With a heatsink of less than 1K/W the fet temperatures can be kept below the shutdown limit of 75degreeC.
The typical power supply used with our amplifiers are not designed for continuous operation - so they will limit what is possible before the amplifier module.

rgds
Kim

For a finished amp we should add PSUs losses too but I guess it could occupy the other end of a nice big,heatshinked case.

 

[Koeitje]

A note to continuos rating for the Purifi Amplifiers - they can all run indefinitely - as long as they are cooled adequetely.
The 1ET9040BA have a power efficiency of around 94% at 750W, giving a power loss of 45W. see datasheet figure 12 & 13. With a heatsink of less than 1K/W the fet temperatures can be kept below the shutdown limit of 75degreeC.
The typical power supply used with our amplifiers are not designed for continuous operation - so they will limit what is possible before the amplifier module.

rgds
Kim

Ah nice, then its going to be the PSU. PC PSU's that provide that kind of power are designed for continuous operation and they all have a 120MM fan to be able to do that.

 

[songOVERsound]

Purifi has their own input board available, the FE-03. Vendors assembling the new 9040 amps are all using input boards of their own (or contracted) design with their own selection or chosen op amps, etc. Some of these vendor input boards have been shown to actually degrade the performance of the 9040. I would prefer just to use the Purifi designed input board but it seems that is not an option any vendors are $upporting.

So vendors are cutting costs on the power supply, buffer board, and op amp because they are already using the Purifi name?

Or is there another unobtainium type of reason? Like it’ll never happen because ______. Which wouldn’t surprise me, after all, there is a reason why we can’t get our hands on a fully built purifi amp to begin with, which I would also like to know

I can hold on to my parasound a23 and get the soldering iron ready. I’d rather do DIY even if it costs a little more if it means avoiding a weak link in the chain

 

[goryu]

No, in order to differentiate their products, vendors are offering their own input board and in some cases, power supplies, and added features. They all likely pay the same wholesale for the amps and power supplies and use their own input boards as a way to increase their margins.

 

[songOVERsound]

So it is a “purifi” amp, but only that one component of the signal chain. Input/buffer board > OP amp > Purifi amp. Only 1 of 3 items in the signal chain is Purifi.

The power supply arguably I don’t count because it’s not in the signal chain. The chassis I don’t count… sorry if this seems obtuse, I’m only just learning about this stuff.

Does what I said seem correct or am I off course?

 

[goryu]

So it is a “purifi” amp, but only that one component of the signal chain. Input/buffer board > OP amp > Purifi amp. Only 1 of 3 items in the signal chain is Purifi.

The power supply arguably I don’t count because it’s not in the signal chain. The chassis I don’t count… sorry if this seems obtuse, I’m only just learning about this stuff.

Does what I said seem correct or am I off course?

Yes, most vendors are only using the Purifi amp module.