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A wishlist of gear to be reviewed by Amir

Silou

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Something like the Stax SRM1 Mk2 would be interesting to see. But is that even possible for the Audio Analyzer? The Output should differ a lot from normal headphone amps.
 

amirm

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Something like the Stax SRM1 Mk2 would be interesting to see. But is that even possible for the Audio Analyzer? The Output should differ a lot from normal headphone amps.
It is on my todo list to measure my three Stax amps. They are much older than current ones but will give us some data points. I will need to build a safe connector that avoids the high voltage bias.
 

RayDunzl

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I will need to build a safe connector that avoids the high voltage bias.

The signal voltage is high, too, is it not?

How do they compare?
 

amirm

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The signal voltage is high, too, is it not?
Yes although I don't know how high. My AP analyzer can accept up to 150 volts. If they are higher than that, I have a differential probe with 10:1 attenuation I can use. I am going to instrument it with my scope and this probe first before performing any measurements.

Alternatively I can open the box and go before the transformers.
 

RayDunzl

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How does what compare?

The bias and signal voltages.

You mentioned being wary of the bias voltage.

The signal voltage may be quite high too.

One schematic I looked at seemed to indicate 450Vrms for the signal.

On the panel speakers, my schematic is not marked, but elsewhere a 100:1 step-up signal transformer was discussed. That may be high, but...
 
Last edited:

RayDunzl

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Alternatively I can open the box and go before the transformers.

I didn't see output transformers on the Stax/Clone schematics.

Anyway, I might expect high signal voltages at "full scale" in addition to the known expectation for tthe bias voltage.

---
Stax 727 II specs
Max. Output Voltage: 450V r.m.s. (1kHz)
 

amirm

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2288481.png
 

Silou

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It is on my todo list to measure my three Stax amps. They are much older than current ones but will give us some data points. I will need to build a safe connector that avoids the high voltage bias.
Good to know! I am just curious if they Line Outs on these devices are any good, or if they affect the signal in any way.
 

vitalii427

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amirm

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Did you find it? I have one also. Very interesting how it measures.
Yes I did. It is a pretty solid little device mechanically. I will see if I can review it quickly....
 

amirm

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typericey

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Something for the masses:
Topping PA3 integrated amp
 

amirm

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That was my mistake as well, those are Singapore dollars, in USD it is $650. I'm considering to buy one after hearing lots of praise.
Ah, that is not as expensive as I thought. Are you in US and if so, want to buy one for me to test?
 

ReAlien

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Ah, that is not as expensive as I thought. Are you in US and if so, want to buy one for me to test?
Alas, I'm in Eastern Europe (Ukraine), otherwise, I'd gladly do that.
 

ReAlien

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Oh hello, fellow countryman. Which city are you from?
Oh, nice to meet you! I'm from Kyiv too! I'll write to you in personal messages so that we don't pollute the thread.)
 

westyjeff

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@amirm I just received the Hiby R6 Pro DAP, Would you be interested in testing this latest and "greatest" DAP?
 

amirm

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@amirm I just received the Hiby R6 Pro DAP, Would you be interested in testing this latest and "greatest" DAP?
I looked up its specs and saw this:

1549417232934.png


:)

But yes, if it is the greatest, let's measure it! Please start a conversation with me and we will take it from there.
 
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