Measurements of Singxer SA-1 Headphone Amp(Preview)

[AdamG]

How do you open the case? I removed 5 long screws from the bottom, but the top doesn't want to come off.

Welcome Aboard @NeuroAudio.

 

[amirm]

I just tested the unit. Need to do a bit more and will then post the results (tomorrow my time).

 

[amirm]

Review is out: https://www.audiosciencereview.com/...xer-sa-1-review-balanced-headphone-amp.23365/

 

[Celty]

Review is out: https://www.audiosciencereview.com/...xer-sa-1-review-balanced-headphone-amp.23365/

Fantastic, had been hoping you would do that review. Now to read it

 

[pimy]

Singxer SA-1 Balanced Headphone Amp Review:

 

[deafenears]

H-z is to change the output impedance of the headphone output from 1.4 to 10 I think it is. I don't see why you would want to do that unless it was to mess with the sound or to use 600 ohm headphones or something.

On Passion for Sound's YouTube channel, it shows a bit of bass boost with the Focal Utopia with H-z:

The Utopia has an impedance of 80Ω.

Might also help with some IEMs such as the ThieAudio Monarch per Crinacle's testing (site seems to be unresponsive to me at the moment so unable to link to the graph, but when it's up - https://crinacle.com/2020/08/26/thieaudio-monarch-and-clairvoyance-review-twin-wins/).

 

[tom.chen]

In the high resistance mode, the control power of the diaphragm will decrease, so the low frequency will be enhanced.

 

[JohnYang1997]

In the high resistance mode, the control power of the diaphragm will decrease, so the low frequency will be enhanced.

 

[Veri]

In the high resistance mode, the control power of the diaphragm will decrease, so the low frequency will be enhanced.

Orrrr the impedance mismatch causes a slight elevation of "low end energy"?

 

[Extreme_Boky]

In the high resistance mode, the control power of the diaphragm will decrease, so the low frequency will be enhanced.

Hi Tom,

I hope you are still lurking....

I posted in the other thread, so I'll try here as well:

Can you please tell me which serial numbers are going to ensure that, If I buy an SA-1, I will get a unit with the additional power rails' decoupling SMD caps (placed around those blue coloured 10ohm SMD resistors)?

I also see 8 protruding solid core wires, coming from underneath the PCB... are there high power resistors mounted underneath.... maybe in contact with the bottom plate, to dissipate the heat

Many thanks for your reply!!!