Buckeye Amps: Purifi 1ET6525SA (the successor to the 1ET400A)

[Buckeye Amps]

Not looking for any pats on the back. But I know my lead times have probably lost me some customers and/or had others question just how serious my business is.

I don't blame those thoughts. I definitely get it. And I know I've said a few times "things will speed up, just a little longer and I'll be ahead on orders".

Well, it's 5pm on a Saturday and I've already filled seven orders today.

I promise, I am working as hard as I can and appreciate everyone's patience. Wait tmes WILL decrease.

 

[Rottmannash]

No rush on my part. Just excited to get my 3ch Buckeye Purifi amp hooked up for my front 3 channels. We all need to be patient, as this new board must be tested and once cleared for use the assembly should speed up considerably.

 

[Buckeye Amps]

Final pictures for the website

 

[bkdc]

Very nice. Can’t wait to receive mine although there might be a delay with the speakon option.

 

[goryu]

which power supply withy the 3 channel?

 

[Buckeye Amps]

which power supply withy the 3 channel?

The SMPS1200.

When designing the 3ch, I talked with Hypex and they were very confident the 1200 would handle (3) 1ET400A's into 4ohms without limiting peak power. Testing so far hasn't shown any issues.

 

[Buckeye Amps]

Dylan,
How is the heat on the Purifi two channel case versus the NC502MP after 30 minutes of use? Thanks!

This I haven't tested myself yet. Mainly due to the lack of NC502's to test with.

I am going to replace my workhorse 4ch NC502MP I have been using for LCR duty for two years now with a 3ch Purifi when I have a little free time, so I can report on the heat difference in my setup I notice.
However, the 4ch 502 case/design I am using is one of my first ever builds so it won't be a completely fair comparison to the new cases with more cutouts/etc I use now.

 

[goryu]

Does using the Hypex SMPS1200A400 power supply drive the 1ET7040SA module to full output power or leave something on the table?

 

[Buckeye Amps]

Does using the Hypex SMPS1200A400 power supply drive the 1ET7040SA module to full output power or leave something on the table?

Full power, no issues there

 

[goryu]

Full power, no issues there

For a monoblock but not in a stereo application though right?

 

[Buckeye Amps]

For a monoblock but not in a stereo application though right?

Mostly correct. In a monoblock 1ET7040SA configuration, the SMPS1200 is more than enough power.

However, for the 1ET7040SA stereo scenario, the SMPS1200 would not be enough power for 2ohm loads, but would be fine for 4/8ohm loads.

 

[DesertHawk]

Final pictures for the website

Amir will love it! (the XLR jacks aren't upside down )

 

[DesertHawk]

Amir will love it! (the XLR jacks aren't upside down )

This was a joke and had a wink emoji. The emoji isn't showing and without it, I sound like a jerk. Hope you took it the right way!

 

[goryu]

I just checked and I am hearing that new Purifi 7040 needs 75 volts to reach full rated power but the power supply from Hypex smps 1200a400 only puts out 64 volts, while the smps 1200a700 puts out 85 volts, which would be too much. How does this reach rated power with the Hypex smps 1200a400, even in a mono mode, if the voltage output is below that required for full power?

 

[Meanpeak]

I just checked and I am hearing that new Purifi 7040 needs 75 volts to reach full rated power but the power supply from Hypex smps 1200a400 only puts out 64 volts, while the smps 1200a700 puts out 85 volts, which would be too much. How does this reach rated power with the Hypex smps 1200a400, even in a mono mode, if the voltage output is below that required for full power?

You may take a look at this supply. it's available in +-70VDC in the selection, as far as I know they can customize it for you.

SMPS1K-PFCR2 – MicroAudio

micro-audio.com

You will get the same output voltage even if your line voltage goes down to 100VAC or up to 260VAC

 

[goryu]

You may take a look at this supply. it's available in +-70VDC in the selection, as far as I know they can customize it for you.

SMPS1K-PFCR2 – MicroAudio

micro-audio.com

You will get the same output voltage even if your line voltage goes down to 100VAC or up to 260VAC

That won't get you to full rated power either at 70V without customization from the manufacturer. Since the amp module from Purifi is only available to OEM's, this might be of interest to them.

 

[Meanpeak]

That won't get you to full rated power either at 70V without customization from the manufacturer. Since the amp module from Purifi is only available to OEM's, this might be of interest to them.

That manufacturer can build +-75V I think, still, you have to check

If you don't get the full output power with that supply, then make sure that the Hypex will give you even worse results, especially at 120VAC

 

[Buckeye Amps]

I just checked and I am hearing that new Purifi 7040 needs 75 volts to reach full rated power but the power supply from Hypex smps 1200a400 only puts out 64 volts, while the smps 1200a700 puts out 85 volts, which would be too much. How does this reach rated power with the Hypex smps 1200a400, even in a mono mode, if the voltage output is below that required for full power?

Let me double check something and I will get back to you with a correct answer (on my end).

 

[Meanpeak]

That won't get you to full rated power either at 70V without customization from the manufacturer. Since the amp module from Purifi is only available to OEM's, this might be of interest to them.

If I understand you correctly, then all those manufacturers who are selling or going to sell any amplifiers with the 1ET7040SA modules will be selling it by misleading the customers. Specially if the SMPS1200 from Hypex is +-64 and subject to the AC line variations.

For example if my AC line voltage is 225VAC, and at other place 240VAC what do you expect?

 

[goryu]

Output voltage in the data sheet mentions that it is proportional to the line input voltage. Even if your line voltage is at the maximum allowed below, you will not be able to drive the 7040 amp module to full power with the Hypex supply. With normal line voltages, the max output should be derated 12%-15% if using the 1200a400 power supply so maybe 800 watts max at 2 ohm versus 450 watts max at 2 ohm for the 400A module. At 4 and 8 ohms, it would be on par with the 400A amp, so unless you have large, low impedance loads, the 7040 isn't getting you anything more than the 400A module offers power-wise. Distortion seems a bit worse than the 400A.




SMPS1200A400
10xx 20-07-2021 5
3 Electrical Specifications
3.1 Power Specifications
Parameter Conditions Symbol Min Typ Max Unit Note
High Line Input Voltage - VB 180 230 264 Vac 1)
Low Line Input Voltage VB,FP 90 115 132 Vac 1
3.2 General Performance Data
Parameter Conditions Symbol Min Typ Max Unit Note
Output Voltage Main A400, symmetric VOUT 2x49 2x63 2x72 Vdc 1), 2)


Note 1: Output voltage is proportional to the mains line voltage
(Min@180Vac, Typical@230Vac, Max@264Vac).
Note 2: These outputs are fully long term shortcut protected: outputs to ground, output to output.