It depends on headphones impedance, AFAIK it has three modes: low(0.3v), line(1v), high(1.8v). I don't know how much impedance could trigger the high mode, it needs more test.@amirm It would be nice to know how much wattage this little thing can output compared to the Apple dongle
I've gotta say, the decision to use recycled AMD CPUs as case heatsinks is resourceful and clever. Takes me back too because one of those Athlon 64 X2 processors is still chugging away in my parents' desktop computer over a decade later. Maybe I could part out the case and upgrade it...I found one on Ali with a nice looking case
https://s.click.aliexpress.com/e/bc5tLGN2
I can't run my sweeps with this test setup. I also can't figure out how to get it to 1.8 volt output as opposed to 1 volt I got. Using 1 volt and assuming it can maintain that into 300 ohm, you get 1/300 or 3.3 milliwatts. If you can get it up to 1.8 volts, then you get 11 milliwatts of power into 300 ohm.@amirm It would be nice to know how much wattage this little thing can output compared to the Apple dongle
Someone mentioned it before. You need a higher impedance to get a higher output voltage. I think I read something like 50-60 Ohm somewhere in a German forum. A little impedance adapter should do the job.I can't run my sweeps with this test setup. I also can't figure out how to get it to 1.8 volt output as opposed to 1 volt I got. Using 1 volt and assuming it can maintain that into 300 ohm, you get 1/300 or 3.3 milliwatts. If you can get it up to 1.8 volts, then you get 11 milliwatts of power into 300 ohm.
I tried it with 33 ohm up to 100K but could not make it output more. It is clearly possible given other measurements I have seen but I only have so much patience for such things.Someone mentioned it before. You need a higher impedance to get a higher output voltage. I think I read something like 50-60 Ohm somewhere in a German forum. A little impedance adapter should do the job.
Don't put any adapters in between. Nothing is required there. The only issue you may have is lack of output voltage to drive the NX3 to max power. Check the specs on MX3 to make sure it doesn't need more input to reach its full power.Would it be a problem to connect this device with a Topping NX3 and put an impedance adapter between the two? Which parameters would be affected? It should be a bit quieter because of the higher impedance but anything else?
I think these kind of devices are the most interesting ones for me. I do not really care about phono stages or streamers but these cheap inconspicuous items are what I am here for. This is only my opinion ofc.It is clearly possible given other measurements I have seen but I only have so much patience for such things.
I tried it with 33 ohm up to 100K but could not make it output more. It is clearly possible given other measurements I have seen but I only have so much patience for such things.
The latter, if I connect the cord by itself, it will work in lineout mode and give a 1v max output.So you connect the extension cord by itself or while it is also hooked up to ER4B?
This is how I manage to maintain the high impedance mode:
1.Connect the device to host with USB,
2.Connect ER4B to an extension cable,
3.Connect the extension cable to device,
4.Since the step 3 boots the device, and it keeps working until you detach the cable from the device. So I can detach ER4B now, then I can connect other headphone to the extension cable.
Anyway I cannot confirm it's 1.8v, but it should be higher than 1v, since it produces much larger loudness.
If its the "External Device" mode in LG phones, you got Step 2 and Step 3 in reverse.
i) Connect extension first.
ii) Connect headphone / earphone to extension after playback software is loaded.
That's how I work mine from the G6 and now the V40.
This is a review and detailed measurements of a bare board LG G5 Hi-Fi Plus DAC and headphone amplifier. As the name indicates, it is an accessory piece for the LG phones to increase performance.
This was an accessory for LG *G5*. I tested the *G7* and it seems to have similar subsystem in it now. It would have been an improvement for G5 (I am assuming)So the was little or no 'increased performance' for the LG phone in real terms and you need to carry around a wiggly plastic box as well?