Bruno Strikes Again. Purifi 1ET7040SA VTV Amplifier.

[dlaloum]

Is there any word out there on Amps using the new 7040 module? - Apparently it might be capable down to 2ohm - are there any measurements anywhere?

 

[mSpot]

I'm late getting caught up with this thread...

Did Darko allow you to copy/paste his interview from Putzeys in your video?

Fair use (only 1 min 40 sec was used from a 21 min video).

Professional courtesy. Wouldn't you appreciate it if someone asked before copying some of your content? Darko makes a living from being a vlogger and podcaster, and has posted about how much work goes into his productions. Also, 1 min 40 sec is really quite a long excerpt. YouTube would surely take it down if Darko requested.

 

[Lord Victor]

Is there any word out there on Amps using the new 7040 module? - Apparently it might be capable down to 2ohm - are there any measurements anywhere?

I’m also curious if the increased power capability have had detrimental effects on the general performance in normal listening levels, or if it has remained the same/improved.
In other words, for the normal listener, where 175w is plenty, does the new module present a hypothetical upgrade, or merely something useful for fx. Subwoofer designs, people with colossal rooms, etc?

 

[mimaximax]

Can someone explain the advantages of going for a stereo 1et7040sa instead of two stereo 1et400a bridged?

 

[dlaloum]

When you bridge an amp, you effectively halve the impedance of your load... so the now higher powered amp is now also required to provide double the current...

With typical 8 ohm speakers, dropping them to 4 ohm won't cause issues with your bridged amp and you will have much more headroom.

But with a 4 ohm speaker - or perhaps one with impedance which at some frequencies drops below 2 ohm... you are halving the extremes - so that amp now has to cope with a 2 ohm (nominal) speaker and dips that drop below 1 ohm.

Many amps don't cope well with that - in the old days, many would go up in a puff of smoke... nowadays they usually have some form of built in protection circuits.... but needless to say, they don't sound great when under that sort of stress... their distortion rises dramatically, they are well outside their optimal performance envelope.

 

[mk1classic]

ROUGE STUDIO N8
PURIFI 1ET7040SA according to their facebook page.

 

[EdW]

March Audio are showing 1ET7040SA monoblock amps with delivery early April along with a new reduced power Purifi stereo amp.

P501 Mono-Block Power Amplifier - March Audio

The P501 is a Purifi 1ET7040SA based mono-block amplifier. This simply elegant product is milled from solid aluminium with a tough anodized treatment. Exceptional fit, finish and build quality. Class leading technical and subjective audio performance.

www.marchaudio.com

P262 Stereo Power Amplifier - March Audio

The P262 is a Purifi based stereo power amplifier. This simply elegant product is milled from solid aluminium with a tough anodized treatment. Exceptional fit, finish and build quality. Class leading technical and subjective audio performance.

www.marchaudio.com

 

[dlaloum]

P501 is specced at 950W into 2 ohm, 500W into 4 ohm - this should handle difficult speaker loads with ease... nice!

Would love to see one of these on the bench.

 

[Matias]

@boXem | audio and @Apollon Audio would you please share some previews too?

 

[BossBunos]

@boXem | audio and @Apollon Audio would you please share some previews too?

Interested as well!

 

[KMO]

Apollon now has listings for amplifiers on their site, but no indication of availability:

PET 900 Monoblock (1x 1ET7040SA, 1x SMPS1200A700, Weiss OP2-BP Op Amp) €2495+VAT; or €2345 with SI990
PET 900 Stereo (2x 1ET7040SA, 2x SMPS1200A700, Weiss OP2-BP Op Amps) €4490+VAT; or €4190 with SI990
Pure 3-5 (3-5x 1ET7040SA, 1x SMPS3KA400, OPA1612 Op Amps) €3090+VAT upwards
Pure 6-12 (6-12x 1ET7040SA, 2x SMPS3KA400, OPA1612 Op Amps) €4990+VAT upwards

(Something's not quite right there - presumably they should all be A400 or A700 power supplies?)

No equivalent of the 1ET400A Mini shown though (cheaper 2-channel in the Pure 3-12 style with OPA1612).

Having just received a 1ET400A Pure 5, I'm pleased to see there is an even more ridiculous Apollon product. I feel less extravagant now.

 

[EdW]

Apollon now has listings for amplifiers on their site, but no indication of availability:

PET 900 Monoblock (1x 1ET7040SA, 1x SMPS1200A700, Weiss OP2-BP Op Amp) €2495+VAT; or €2345 with SI990
PET 900 Stereo (2x 1ET7040SA, 2x SMPS1200A700, Weiss OP2-BP Op Amps) €4490+VAT; or €4190 with SI990
Pure 3-5 (3-5x 1ET7040SA, 1x SMPS3KA400, OPA1612 Op Amps) €3090+VAT upwards
Pure 6-12 (6-12x 1ET7040SA, 2x SMPS3KA400, OPA1612 Op Amps) €4990+VAT upwards

(Something's not quite right there - presumably they should all be A400 or A700 power supplies?)

No equivalent of the 1ET400A Mini shown though (cheaper 2-channel in the Pure 3-12 style with OPA1612).

Having just received a 1ET400A Pure 5, I'm pleased to see there is an even more ridiculous Apollon product. I feel less extravagant now.

Interesting - the less expensive Pure series amplifiers use the 3.6KW Hypex power supplies. These power supplies are best suited for bridged amplifiers since they do not have 2 quadrant operation.

https://www.hypex.nl/documenten/download/2357

Workarounds would have the 2 channels of a stereo amplifier amplifier working with one channel running in opposite polarity to the other (Not sure how this works with an odd number of channels though)

EDIT: also concerned that one Hypex psu might not be capable of powering 5 amplifiers driving 2 Ohm loads? A major reason to buy the 1ET7070SA in preference to the 1ET400 is, after all, its ability to drive exceptionally low impedances.

 

[BossBunos]

I hope Apollon releases a model with 'normal'/less expensive op amps but in their nice premium casing. Like the mini. Would love to see the nc1200/2k in such a case as well

 

[B&WTube]

I did read through this thread, but I still have a stupid question: Beyond the power/ohm changes from the 400ET- are there any other design/hardware improvements we know of?

 

[jae]

I did read through this thread, but I still have a stupid question: Beyond the power/ohm changes from the 400ET- are there any other design/hardware improvements we know of?

I believe the specs in terms of noise/distortion actually rise (get worse), albeit marginally.

 

[boXem]

I did read through this thread, but I still have a stupid question: Beyond the power/ohm changes from the 400ET- are there any other design/hardware improvements we know of?

Designs look very close. The most noticeable thing is a new modulator board with higher complexity. I was told it was to accommodate higher power modules (bridged?).

 

[Lord Victor]

The fact that these modules are technically on market now, and still not available for purchase directly, worries me - anyone heard news in that regard?

 

[drewdawg999]

March Audio are showing 1ET7040SA monoblock amps with delivery early April along with a new reduced power Purifi stereo amp.

P501 Mono-Block Power Amplifier - March Audio

The P501 is a Purifi 1ET7040SA based mono-block amplifier. This simply elegant product is milled from solid aluminium with a tough anodized treatment. Exceptional fit, finish and build quality. Class leading technical and subjective audio performance.

www.marchaudio.com

The P501 looks awesome! Though having to buy a pair would be too rich for my blood. I got the March P502 not too long ago, which seems to have been sold out and phased out, as March Audio has gone all Purifi. I'm doubtful I could tell a difference though, as the P502 does its job incredibly well, driving my Vandersteen 2ce Sigs properly, making them sound the best they ever have in my 20 years of owning them. The P502 does have more power, at 350 watts into 8 ohms, making it a sweet bargain! Some users have both Hypex and Purifi and report that they sound the same, so chasing SINAD may be futile for penny pinchers.

 

[beantownT]

Interesting - the less expensive Pure series amplifiers use the 3.6KW Hypex power supplies. These power supplies are best suited for bridged amplifiers since they do not have 2 quadrant operation.

https://www.hypex.nl/documenten/download/2357

Workarounds would have the 2 channels of a stereo amplifier amplifier working with one channel running in opposite polarity to the other (Not sure how this works with an odd number of channels though)

EDIT: also concerned that one Hypex psu might not be capable of powering 5 amplifiers driving 2 Ohm loads? A major reason to buy the 1ET7070SA in preference to the 1ET400 is, after all, its ability to drive exceptionally low impedances.

i had a chat w/ their support team yesterday about my PNC1200 Stereo amp shipping delay. Hypex hasn't sent them the amps so the delay in setup/ship. Interestingly, during the chat, the agent mentioned if i wanted to switch the PNC1200 w/ the 1ET7040SA purifi modules as they could ship it asap.

i hesitated as
1) I have an 8 channel Hypex being shipped from them
2) not enough info on the 7040SA in the wild yet and dont want to be the super early adopter

i hope i made the right choice to stick w/ the PNC1200 Stereo

 

[stren]

Curious with Apollon's pricing - the 2 channel and 5 channel versions are almost the same price?