Was curious, so went on the website for some more information. But I saw this "Noise levels are inaudible even with the most sensitive of IEMs", meanwhile noise level: 7uV. Wut?
Sorry if I'm being annoying.
Sorry if I'm being annoying.
Was curious, so went on the website for some more information. But I saw this "Noise levels are inaudible even with the most sensitive of IEMs", meanwhile noise level: 7uV. Wut?
Sorry if I'm being annoying.
Hi @Music1969Hi @March Audio
I don’t see the headphone output imedance on your website (maximum for 20Hz to 20kHz).
And what is the current output (RMS) into 8 ohms?
And can you please show a photo of the 12Vdc power adapter that it comes with, to show worldwide safety certifications?
I thought he asked for RMS current?Hi @Music1969
Amir measured the output Z at 0.8 ohms.
Current output maximum is 145mA.
I'm not in the office at the moment (won't be until Friday) so can't take a photo but the moment but the unit conforms to the following standards.
Standards Met: BS EN 60950-1, CE, EN 55022, FCC, RCM, SAA AS/NZS 60950-1, TUV-GS EN 60950-1, UL/cUL U 60950-1
Hope that helps
Hi @Music1969
Amir measured the output Z at 0.8 ohms.
Current output maximum is 145mA.
I'm not in the office at the moment (won't be until Friday) so can't take a photo but the unit conforms to the following standards.
Standards Met: BS EN 60950-1, CE, EN 55022, FCC, RCM, SAA AS/NZS 60950-1, TUV-GS EN 60950-1, UL/cUL U 60950-1
Hope that helps
The maximum sink is -130mA-pk so 92mA RMS.Thanks for the info.
Have I missed Amir’s measurements?
Or is it just something he’s sent you privately?
And yes RMS current output would be appreciated if you could.
Thanks for the info.
Have I missed Amir’s measurements?
Or is it just something he’s sent you privately?
And yes RMS current output would be appreciated if you could.
It was private of the prototype, but it's where the other measurements shown in the thread came from.
To clarify the max output current ls +— 145mA. Rms is 103mA.
Just curious what cans are you using with 8 ohms impedance?
Are you sure the sinking is -145mA?It was private of the prototype, but it's where the other measurements shown in the thread came from.
To clarify the max output current ls +— 145mA. Rms is 103mA.
Just curious what cans are you using with 8 ohms impedance?
Yes. It has been measured so please don't start quoting chip specs.Are you sure the sinking is -145mA?
hmm okYes. It has been measured so please don't start quoting chip specs.
Nope.The maximum sink is -130mA-pk so 92mA RMS.
Looking at inner fidelity tests they are 14 ohms, but of course being MP it's mostly a resistive flat line. It's still low for a typical MP.The very popular MrSpeakers AEONs which are ~12 ohms.
Asking about 8 ohms for margin/headroom
My concentration at the moment is on the new speakers and dealing with the impact of the Covid problems. It's a logistics headache in terms of supply chain and takes up a lot of time.There's obviously a lot going on in the world right now but is your HPA-1 impacted @March Audio ?
Do you have a timeline when Amir will be measuring production version of HPA-1?
Or is any kind of timeline off the table until things get better with the world situation?