Yep, looks like Lepai has a new 'A' version. I guess we can't blame PE for that!
So much for replacing the resistors (what gets surface mounted, stays surface mounted). Being a new board, it's a new ball game. Mods for the original board may not be applicable, or desirable for that matter....
Thanks for the pics!
My power supply lasted less than one hour.
Out of the box it tested 13.56, I always test before using.
Tested the DC offset and it didn't look that good.
Sometime in the next hour I noticed the unit had shut down, crap! I was happy to see my power supply producing 0 volts. I used one of my 12V 2A units that tested at 12.26 and it's all good again.
Tested the DC offset again and it looked very good.
No listening yet.
Out of the box it tested 13.56, I always test before using.
Tested the DC offset and it didn't look that good.
Sometime in the next hour I noticed the unit had shut down, crap! I was happy to see my power supply producing 0 volts. I used one of my 12V 2A units that tested at 12.26 and it's all good again.
Tested the DC offset again and it looked very good.
No listening yet.
OK, I just got mine form China today.
Doesn't have the bypass button and only has one op-amp
Sounds good. No speaker pop on startup, sounds better than the old one.
Will post pictures tomorrow...
-Nick
Doesn't have the bypass button and only has one op-amp
Sounds good. No speaker pop on startup, sounds better than the old one.
Will post pictures tomorrow...
-Nick
have had my 2020A+ a few days,amending my comments...there isn't a "pop" at startup so much as a soft thump with a little cone movement. Not anywhere like what i recall with other amps. For fun I tried it with a 12in. dual coil old skool AC12 sub...it sounded fine and barely got warm,even tho I had the volume to 1pm...I think the sensitivity on the sub was 89db...I was feeding it the sub output from the home receiver, so only sound under 80hz...I regained my senses and went back to the old Luxman I was using before. I am looking forward to any insights and improvements. Figures I get the amp just as they change it!
I also ordered a Lepai LP-2020A+ from a Korean company (I live there). I received it yesterday, in good order.
The chip is a Tripath TA2020 (The packaging is the same for two models: LP-2020A+ and LP-V3, one photo of each model on each side, with a sticker to indicate which one is included).
This is a photo of the internals:
The chip is a Tripath TA2020 (The packaging is the same for two models: LP-2020A+ and LP-V3, one photo of each model on each side, with a sticker to indicate which one is included).
This is a photo of the internals:
Sorry. The photo is here : 
The PCB says LP-2020B. But it's written LP-2020+ on the aluminium casing. Also, there is no tone defeat button.
The PCB says LP-2020B. But it's written LP-2020+ on the aluminium casing. Also, there is no tone defeat button.
Burnt 1 up today curious if anyone would know what happened, I plugged ina 52 amp 12 volt power supply , I accidentally had the groudn and hots backwards smelled copper burning voltage still seems to run throughout with no problems what so ever 12 volt everywhere on the board( that I can think to check) but no sound anymore. (still turns on just fine just no sound whatsoever)
Any Ideas ?
Any Ideas ?
Sorry. The photo is here :
The PCB says LP-2020B. But it's written LP-2020+ on the aluminium casing. Also, there is no tone defeat button.
The one that I bought looked just like that, just without the tone controls. Only has one premp, no clicks ect. on startup, and sounds very well.
Where did you find yours?
If found mine here: Gmarket - Buy and Sell Apparel, Cosmetics, Jewelry, Electronics & more at low price
And the PCB full size pic is here : Lepai LP-2020A+ - My Photo Gallery
On mine, the left/right input channel are reversed.
And the PCB full size pic is here : Lepai LP-2020A+ - My Photo Gallery
On mine, the left/right input channel are reversed.
Mine came from Parts Express in the USA. I think you will need to check there which model they currently peddle. It appears the ones they have now have the tone defeat button, but mine I received several weeks ago, does not. No complaints with the sound, but the relay delays startup up to 20 minutes. I just leave it on continuously.
Thanks. My Lepai is ok, I use it to power a pair of bad computer speakers now. But the result is quiet stunning. I never thought junk speaker could sound that good... (relatively speakingm of course).
I probably will not mod it now. I'd rather buy a decent pair of speakers and an amp6 kit first.
I probably will not mod it now. I'd rather buy a decent pair of speakers and an amp6 kit first.
I bought 2 new 101110PC LP-2020A+. Both DOA. No sound output. Looks like ground wasn't wired right. I'm wondering if any one else had the same issue or know of a fix.
Thanks
Thanks
Mintos. Have you checked the voltage of your DC power source? I've read in this thread that if it is too high (I forgot the exact figure, but it's lower than the Tripath TA2020 specs), the Lepai does exactly what you describe. 12V is safe.
Mintos,
Have you left it plugged in for a period of time with an audio source? My Lepai has this relay that delays output from anytime between 5 and 30 minutes. This is probably a flaw, but for my purposes as an amplifier for a PC sound system it isn't an issue as I leave the power on all of the time.
It seems these Lepai amps are as the sands of the sea as far as how they are constructed, and how they perform. Mine sounds wonderful, as long as I turn it on many minutes before I wish to hear it play.
Have you left it plugged in for a period of time with an audio source? My Lepai has this relay that delays output from anytime between 5 and 30 minutes. This is probably a flaw, but for my purposes as an amplifier for a PC sound system it isn't an issue as I leave the power on all of the time.
It seems these Lepai amps are as the sands of the sea as far as how they are constructed, and how they perform. Mine sounds wonderful, as long as I turn it on many minutes before I wish to hear it play.
That would be what's printed on the power supply, right? Are you able to measure it with a multimeter? I got a 2020+ and it was DOA as well. I got mine from PE in the US and they said the power supply was rated at 12VDC but should actually put out at least 13.5VDC. I was getting nothing out of the speakers but the blue LED was on. They're sending me a replacement so I started looking through my stuff and found a 12VDC 5A power supply with the correct size plug and tried it and it works. I measured the power supply I have and it puts out 12.2VDC. What they told me seems to be opposite of what I read here (that the voltage needed to be below 13.5VDC) but in any case, the 12VDC power supply that I have that actually puts out 12.2VDC works. The one that came with my amp that is marked as 12VDC actually puts out 13.44VDC does not work.
If you aren't able to measure the actual output of your power supply it might not hurt to try another, compatible supply that is also rated at 12VDC and at least 2A.
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