Lepy LP-2020A Compared to Lepai LP-2020A+
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- เผยแพร่เมื่อ 1 ส.ค. 2018
- This video compares a Tripath chip Lepai LP-2020A+ to a cheaper Lepy LP-2020A. The look is similar but the performance is very different. The Lepai has more audio out. It uses a Tripath chip. The Lepy uses a cheap LP2020 chip which is poorly engineered and produces an enormous amount of RFI. The interference is so strong I cannot use the amp with my shortwave receiver. The Lepai also produces an lot of RFI but not as much as the Lepy. Neither one is a good choice for using around shortwave radios.
- วิทยาศาสตร์และเทคโนโลยี
Class D amplifiers in general produce RF-spectrum interference that must be suppressed somehow. This is done by the output filter so the speaker wires do not become the radiating antenna, but if you remove the case then the board traces themselves can become the radiating antenna.
Thanks for this video! I'm now building out a DIY upgraded audio solution for a 1UP Mini Arcade cab.
At first I thought it was a typo on the brand name of the amps I was browsing. I was looking at a Lepy LP-168 plus w/ bluetooth as a un needed but nice to have extra feature.. but now I will skip on the bluetooth and get a Lepai. Thanks!
I found the lepai amplifier today at the local salvation army. It is a beast. I hooked up two Bose speakers and pushed the button for direct. Definitely using this at my job when they do free movie night. Thanks for the amazing review. Hope you and your family doing well Sir. Thanks again.
Your an legend bro you donated 💯 wow man you rock I subed
Thanks for the video, sir!
Than you for your excellent video
l had the original tripath lepai 2020A+ amp and that thing was a beast. l mean for such a small and cheap amp it carried it's weight. the lepy's class-D chip is more power efficient than the lepai's class-T but it doesn't sound as good. but as far as chinese mini amps go these 2 are the best of the bunch. they are the gold and silver teeth at the bottom of the dumpster.
Where I can buy LP2020A+ kit? Only Tripath version which comes with TA2020 020 chip
which speakers do you recommend if I want to use it together with any of the GEEKOM minis?
WWV Fort Collins, Colorado. That was really unexpected. I liked it!
have you looked at the lepy v3s? I have the 2020A+ and I want to buy the best available similar unit.
Does the RF emit even if it's switched off? Or do you have to unplug? Does any of the RF detectable with the case on? Thanks for the vid!
The spurious emissions are created and transmitted along with the audio whether in the case or not. When switched off everything is OK.
Okay so one has loud distortion and the other has louder distortion
I have the Lepy and it has way more volume than most people will ever need and I have not heard any distortion.
Question: Why did you put a resistor in the other speaker plug?
A speaker output should always have a speaker attached or a load resistor equal to a speaker impedance. On tube amps it prevents voltages from spiking and burning out the transformer. On this small transistor amp it prevents the output transistor from being unloaded and out of control which can also cause failure.
are ether of these good for arcade cabinet builds i cant find the + version for a good price
They are definitely audio amps but you will have to test to see it they suit your purpose.
yeah they'll do the trick.
I really want to know can you please explain why when you put your finger on the chip of the lp-2020a the interference goes away?
The chip is producing uncontrolled radiation caused by the poorly made power supply or internal to the chip. Placing the hand around the speaker wire, power supply wire or touching the chip interferes with the oscillation and makes it calm down. Everything is acting like an antenna.
@@charlessmith833 oh ok thanks
If you took insulated wires and peeled off the insulation you wouldn't expect the wires to still be safe to touch would you? I don't think it's a fair comparison to remove the shielding of these devices and then expect them to still work the same... Yes they work different under those circumstances but that's not the circumstances the manufacturer expects you to use this device, and that's to say they very well might have identical performances when fully assembled.
Wisdom from another planet?
Why you have resistor in the left channel?
I'm only using one channel. The other channel needs to have a load resistor to keep it from damaging the output at high volume. Standard procedure.
R38 is BRUNET! on the Lepai LP-2020A+
Towards the end of the video you point out that both amps are made in Bukang, and say that they're "both made in China." Not that it makes any difference in terms of build quality, but Bukang is in Indonesia, not China.
Wow, thanks guy. You are right. Thanks for noticing the error in my video. That's the first time I have ever been wrong (heh heh). If they had paid attention to the EMI and RF they emit these amps could be great. Unfortunately they cannot be used alongside my shortwave receivers. The FCC has requirements for this type of emission but it just doesn't get enforced. China is flooding us with substandard products that produce a lot of EMI. Sorry to see that other countries are slipping in the same type of stuff.
,,.,,
@@charlessmith833 The company is Chinese but they're outsourcing some of their manufacturing to (cheaper) places like Vietnam, Indonesia and now Africa.
Again, its about reminiscing because the 2020A is no longer available.
Richard Waters many reviews and photos point to shady build quality
nice review, Bukang is in Indonesia tho
no, bukang is in philippines
I am SO confused! I am looking for some way to listen to quality sound music through my laptop. Can I use the Lepai to play music connected to regular stereo speakers?
You certainly can use it with your laptop if you are happy with the sound. It will connect to regular speakers. It may be louder with 4 ohm rather than 8 ohm speakers because of the loading. If you want better sound connect your laptop to your home stereo system.
I brought Lepy2.1 Lp838.
I wonder if I can use these products to watch movies
Yes, that should work very well.
or do you have a suggestion for this
Don't understand the question. The Lepai with Tripath chip is better and will work OK if you are not using it for Radio Communications equipment. The Lepy uses a cheap chip and is tinny sounding. It produces a lot of RFI (Radio Frequency Interference). If you want decent audio invest in a used Public Address amp of 20 watts or so that uses analog technology like the ones Radio Shack used to sell. If it doesn't work it can be repaired.
Damn it why do I always get the bad products 😥
Bad products make good TH-cam videos. Thank goodness there are a lot of comparison type videos to help us out.
@@charlessmith833 yeah
i have the old lepai btw
Sounds like the Lepy has paranormal demon screech coming from it . Yikes!
I have one don’t waste your time they are horrible
what are you doin men?
Both sond same. Same amount of crappy static. Static at any level sounds like ass!
Pretty much just good for testing audio inputs .