Cymax Purifi 1ET9040BA with Weiss OP2-BP Dual-Mono Power Amplifier

[David_M]

In the +-32V version the voltage drops 0.2V at 930W from 64.5V to 64.3V. At 15A output current for 5 seconds.

All tests were made at 100VAC input.

Thanks

Is this when the current changes from 0 to 15A?

 

[MicroAudio]

Is this when the current changes from 0 to 15A?

Here you go

Please note that the voltage drop is NOT a fixed value at the output; it's only the voltage drop captured by the FLUKE 289 DMM at the load event.
The output voltage will recover to its V-out idle - 0.1 ~ 0.2 drop at Load-W.

Hope that answers your question

Thanks

 

[David_M]

Here you go

View attachment 505246

Please note that the voltage drop is NOT a fixed value at the output; it's only the voltage drop captured by the FLUKE 289 DMM at the load event.
The output voltage will recover to its V-out idle - 0.1 ~ 0.2 drop at Load-W.

Hope that answers your question

Thanks

Thank you for this data. A <1% load regulation at 12A is excellent. A < 3% regulation at 17A is good. I assume these numbers were for a fixed line voltage, correct?

When time permits, and you are preparing for a production release, it'd be nice to know the line regulation specs. Maintaining a constant output voltage (and hence output power) with a varying input (85VAC to 240VAC) is crucial.

Thanks again for the data!

 

[MicroAudio]

Thank you for this data. A <1% load regulation at 12A is excellent. A < 3% regulation at 17A is good. I assume these numbers were for a fixed line voltage, correct?

When time permits, and you are preparing for a production release, it'd be nice to know the line regulation specs. Maintaining a constant output voltage (and hence output power) with a varying input (85VAC to 240VAC) is crucial.

Thanks again for the data!

The SMPS is universal AC input 85VAC-260VAC. PFC.

Thanks

 

[Pausi]

I have started a new thread for all things related to Cymax Digital amplifiers.
You’ll find it here: https://www.audiosciencereview.com/...gs-about-cymax-digital-power-amplifier.68960/

 

[chaddawkins]

So now it seems the move from one model to the next is
MK2 to PRO - Independent Fuse Socket + XLR x2
PRO to PRO MK2 - taller chassis + Micro Audio

 

[Descartes]

I was hunting around for a Purifi 1ET9040BA implementation that I really like. I found this power amplifier from Cymax and wanted to share some photos of its design, which has been very thoughtful and high in its quality of implementation and design.

It has dual XLR inputs which enables me to connect my Network Streamer and LR channel of my AV Processor to the Cymax power amp, and have the inputs and gain easily selectable from the front with its rotary dial with LCD display. I love the shielded power supplies and that it uses a linear power supply for the input op-amp boards, keeping the Hypex SMPS1200A180 to power the Purifi 1ET9040BA amp module in dual mono configuration.

Their website allows configuring for various options so I have spec several upgrades

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Black shielding for Hypex SMPS1200A180 (Dual Mono)
Blue shielding for Linear Power Supply for input buffer and power management

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Rotary dial features a LCD display with user selectable XLR input 1 and 2, and user selectable Gain 1 (21.4dB) and Gain 2 (28.4dB)

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Equipped with Furutech FI-06 Rhodium NCF IEC socket.

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Input 1 - Furutech XLR Rhodium socket
Input 2 - Neutrik XLR Gold socket
Output - WBT 0703 Silver

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Weiss OP2-BP input buffer board fed by linear power supply. Neotech UP-OCC copper wiring, nicely implemented.

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It’s running in now on Sonus Faber Amati G5 speakers. First impressions are effortless dynamics, detailed (especially instruments and voice), neutral, bass is punchy (a little less weighty than my Parasound) but seem more textured.

How do they compare to Buckeye