That's fine. Lepai does not use a standard value throughout their amps even of same model.
By the way, C28 and 29 are ALWAYS 100uF 25V or 16V regardless of version.
As for C3, it can be either 470uF or 680uF. It doesn't matter.
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How can i measure the dc offset? Pin 10 to AGND (Pin 3,7,16)? There i have 2,5 Volt !?! Could that be or where to measure it? I have LP-2020A+ PCB. Thx!
You measure on each output channel between the output signal and ground, with no signal into the amp.
Just got one of these. It cuts out sometimes when I bring the volume passed a certain point. Maybe the power supply? It came with 12v 2A plug.
Also what speakers would you recommend to go with this? Is there an ideal impedance?
Currently I have it hooked up to a single speaker cone from an old pye radio but there is distortion.
Also what speakers would you recommend to go with this? Is there an ideal impedance?
Currently I have it hooked up to a single speaker cone from an old pye radio but there is distortion.
Well, there is not really an "ideal" speakers to go with the Lepai. I would say anything between 6 to 8 ohms works fine. I have used my Lepai to drive a Cerwin Vega 3-way floorstanders with 12" woofers without any issues. Currently, it is driving a pair of 3-way Onkyo floorstanders which I prefer.
The 12V 2A is sufficient but a higher current power supply will work better. As for the cut-off problem which you are encountering, yes, most likely it is due to the power supply.
As for the distortion, there are many factors and possibilities. Do you have another pair of speakers to test. If so, switch around to see if the amp is causing it.
Personally I prefer 8 ohms because low impedance load stresses the amp to put out more current, and that can be bad especially if Lepai is incapable of putting out the amount of current the low impedance speaker demands.
Never connect to just one speaker. You might damage your amp.
I'm new to these boards but have been tinkering with various amps and speaker set-ups for bicycle sound systems for a few years now.
I recently purchased two of these amps.
One I accidentally fried due to soldering the negative and positive connections to the wrong parts of the pin(my soldering skills blow and I'm still figuring out these electrical symbols.)
The second one I figured out and got to work right and it sounds great.
Problem is I'm getting sound out of the right channels, but the left is pretty much dead air.
Is there any particular way to get sound out of those channels without resorting to getting a third?
I've still got the first one I bought here and there should still be a few, usable pieces left on board.
I recently purchased two of these amps.
One I accidentally fried due to soldering the negative and positive connections to the wrong parts of the pin(my soldering skills blow and I'm still figuring out these electrical symbols.)
The second one I figured out and got to work right and it sounds great.
Problem is I'm getting sound out of the right channels, but the left is pretty much dead air.
Is there any particular way to get sound out of those channels without resorting to getting a third?
I've still got the first one I bought here and there should still be a few, usable pieces left on board.
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