You are right, only 15W per channel with the included power supply. If you go to this page in the Part Express Website, you will find this, under "All the features you need": Please Note: The included power supply is capable of driving this amp at 2 x 15 watts per channel. To realize the full potential of this amp (>20 watts per channel), we recommend a power supply that is capable of producing 60 watts of total output. (And a heatsink, of course, as you have already established per T.I. Data Sheet) www.parts-express.com/lepai-lp-2020ti-digital-hi-fi-audio-mini-amplifier-with-power-supply--310-3000. Thanks for your review, greatly appreciated.
Good info, thanks for posting. It's nice that Parts Express posted that info. I'm quite impressed with the Lepai LP2020-TI - it's very clean. It would have been nice had Lepai just put an asterisk by their 20 watt power rating so that we would know to read the subscript for caveats or other notations. Regardless, 15 watts is less than a DB from 20, so it's no big deal. I now want to mod this amp for the higher output. I'll make a vid of that too. ;-)
Thanks! After being in the electronics and broadcast industry forever, there are standard procedures for testing and getting accurate results based on these tried and proven methods. Works for audio amps too. ;-)
Thanks for this! Informative! PS - I just got one yesterday and I have to say it sounds excellent through bookshelf speakers! Warm and clean sounding to my ears.
Thanks! Yes, I think this is the cleanest class D amp I've seen for the money. I'm currently working on another vid on how to modify it for 35 watts RMS (4 ohms) per channel . The TPA3118 chip will do it. Not all Class D amps are that great. I've eval'd one of these amps... ruclips.net/video/jGWGAgPx_jw/видео.html They're ok, but I'd much rather have a Class AB amp. ;-)
nice explanation ,and you showed it on screen how you found out the values....with scope and analyzer and dmm proved it out....thanks for sharing...................ray
Yo Bob (Old Mel Brooks movie) Bob as I was watching your RUclips "Lapai LP 2020-TI" and I was in complete agreement with you, but, I am not a Electrical Engineer as you seem to be, in fact I'm not even close ! Notice the Power Supply, I have learned on my own that the "minimal" power supply that can be used on any of these Mini-12v amplifiers is 12v-5A at 60 watts (In fact I totally recommend a 12v 6a = 72 watt Power Supply (Despite what the specs from the manufacturer recommend, and... they run just fine @ = 75% Volume)) including the Kinter MA-180 which at 12v 5a on a two speaker system (I actually used it on 4 - 40 watt (RMS) 4" Speakers and it sounded unbelievably great !)) which will run perfect ! Point being, You're the expert not Me !!! Half way through your 2nd update video I thought of exactly what you said when I came back and finished watching your RUclips video, "Yes, how can I attach a 25m x 25mm 12v "micro-fan" on the side of this Lapai 2020TI (AND maybe drill two holes the way you did and attach a very small heat sink inside (40mm x 40mm x 10mm Aluminum IC DDR RAM VGA Memory Chip Heat Sink 55mm that has a center open to drill the holes that you did)) and keep it completely cool (With 2 drilled holes on the other side for venting just as You recommended), BUT, HOW CAN YOU/I REDUCE THE ELECTRICAL FLOW DOWN TO 12V - LESS-THAN 1A (AMPS) FOR THE MICRO FAN AND WIRE THEM TOGETHER WITH THE LEPAI AMPS (KINTER TOO) AS NOT TO "FRY" THE MINI-FAN ??? YOU CAN ATTACH THAT FAN, but I don't have a clue on how to do it, I would just be guessing and probably fry both !!! But I'll keep on trying because if so, instead of the "Sound Storm SMCM200 MINI 200-WATT MONOBLOCK (I'm going to "try' to make this one work first!), I will try to get this to work on/in a 6.5" Down-Firing Subwoofer (I've got (Recently I purchased) a Logitech 2.1 System without realizing it was a 25 watt System (???) with only 15 watts going to the 4" Sub and you can't believe how great this Sub sounds, cranked up to 3/4 volume you will notice it 3 bedrooms away, when you're trying to sleep!) and beat the Logitech Sub by at least 4x in performance !! Point being x 2, HOW CAN I CONNECT A MINI-FAN UP TO ANY OF THESE AMPS WHEN THE FANS ARE 12v - 1a FANS ??? A degree in Electical Engineering MATTERS ! Your reply is helpful !!! Rick - SoCal
Rick S. - Thanks for your comments. So, if I understand correctly, you want to make the high power modification, but you need to get the right voltage to the fan. first, I'd recommend a12v fan. then, assuming a 20 volt supply, a resistor connected in series to drop the voltage to the fan.. that's it. The resistor will probably be 80 to 100 ohms 2 watt for this, depending on the current draw of the fan. That's what I did for 1 of my other amps... ruclips.net/video/PvCATGgXnTg/видео.html . Go 3:18 into this vid and I explain how I connected the fan. This can help you with yours.
I don't know any amplifier that you can get the total watts out of it as called out on the product of packaging. Parts Express has a video on this when you look at the item and the person on the video specifies 14 watts x 2. I'm ordering one today because the price is marked down to $24.88. Using it for some 5.25 two-way polk speakers.
That TPA3118 chip has a solder pad on its base and is intended to use the ground-plane of the PCB as a heatsink. A PCB properly designed around it (with decently thick copper) _easily_ cools it well enough for maximum output with a c. 18-20V supply, but I assume this hasn't been implemented by Lepai. The TPA3116 version of the chip is designed to use a heat sink and cope with maxxing out on a 24V supply. The TPA3110 is the same chip again, but with no facility for heatsinking at all, intended to be limited to c. 12V, and implemented the way Lepai have the 3118 on this board.
Hey, I have a question. If I have a 19 volt, 3 amp power brick, and if I add a heat sink to the amplifier with a fan, will it work with my power brick? I assume that when you were using 20 volts, you had 3 amps. I wonder if 19v 3 amps will work after mod. Thanks.
Nice review, thank you. So how do you think this amp will behave if i put it in my car and power from the battery at 14.5 volts and drive 4Ω speakers? Do i need in that case to add a heat sink?
Thomas Karagiannis - Thanks. This amp should work ok with 14.5v in the car. It should produce 20 watts rms into 4 ohms without a heat sink with no problems. Just remember not to connect the (-) speaker wire to your car's ground; run speaker wires back to amp.
You are right, only 15W per channel with the included power supply. If you go to this page in the Part Express Website, you will find this, under "All the features you need":
Please Note: The included power supply is capable of driving this amp at 2 x 15 watts per channel. To realize the full potential of this amp (>20 watts per channel), we recommend a power supply that is capable of producing 60 watts of total output. (And a heatsink, of course, as you have already established per T.I. Data Sheet)
www.parts-express.com/lepai-lp-2020ti-digital-hi-fi-audio-mini-amplifier-with-power-supply--310-3000.
Thanks for your review, greatly appreciated.
Good info, thanks for posting. It's nice that Parts Express posted that info. I'm quite impressed with the Lepai LP2020-TI - it's very clean. It would have been nice had Lepai just put an asterisk by their 20 watt power rating so that we would know to read the subscript for caveats or other notations. Regardless, 15 watts is less than a DB from 20, so it's no big deal. I now want to mod this amp for the higher output. I'll make a vid of that too. ;-)
You're welcome, and waiting for your next video. Deeply appreciated. Greetings from PR.
I've made a Part-2 to this vid... ruclips.net/video/NsnPGUZEca8/видео.html
Thanks for your kind invitation. Deeply appreciated.
This is amazing. I wish everything was reviewed like this :)
Thanks! After being in the electronics and broadcast industry forever, there are standard procedures for testing and getting accurate results based on these tried and proven methods. Works for audio amps too. ;-)
Thanks for this! Informative! PS - I just got one yesterday and I have to say it sounds excellent through bookshelf speakers! Warm and clean sounding to my ears.
Thanks! Yes, I think this is the cleanest class D amp I've seen for the money. I'm currently working on another vid on how to modify it for 35 watts RMS (4 ohms) per channel . The TPA3118 chip will do it. Not all Class D amps are that great. I've eval'd one of these amps... ruclips.net/video/jGWGAgPx_jw/видео.html They're ok, but I'd much rather have a Class AB amp. ;-)
Great test, thanks for sharing!
BigDWiz - ;-)
nice explanation ,and you showed it on screen how you found out the values....with scope and analyzer and dmm proved it out....thanks for sharing...................ray
Thanks! I like it to be accurate and nformative.
Yo Bob (Old Mel Brooks movie) Bob as I was watching your RUclips "Lapai LP 2020-TI" and I was in complete agreement with you, but, I am not a Electrical Engineer as you seem to be, in fact I'm not even close ! Notice the Power Supply, I have learned on my own that the "minimal" power supply that can be used on any of these Mini-12v amplifiers is 12v-5A at 60 watts (In fact I totally recommend a 12v 6a = 72 watt Power Supply (Despite what the specs from the manufacturer recommend, and... they run just fine @ = 75% Volume)) including the Kinter MA-180 which at 12v 5a on a two speaker system (I actually used it on 4 - 40 watt (RMS) 4" Speakers and it sounded unbelievably great !)) which will run perfect ! Point being, You're the expert not Me !!! Half way through your 2nd update video I thought of exactly what you said when I came back and finished watching your RUclips video, "Yes, how can I attach a 25m x 25mm 12v "micro-fan" on the side of this Lapai 2020TI (AND maybe drill two holes the way you did and attach a very small heat sink inside (40mm x 40mm x 10mm Aluminum IC DDR RAM VGA Memory Chip Heat Sink 55mm that has a center open to drill the holes that you did)) and keep it completely cool (With 2 drilled holes on the other side for venting just as You recommended), BUT, HOW CAN YOU/I REDUCE THE ELECTRICAL FLOW DOWN TO 12V - LESS-THAN 1A (AMPS) FOR THE MICRO FAN AND WIRE THEM TOGETHER WITH THE LEPAI AMPS (KINTER TOO) AS NOT TO "FRY" THE MINI-FAN ??? YOU CAN ATTACH THAT FAN, but I don't have a clue on how to do it, I would just be guessing and probably fry both !!! But I'll keep on trying because if so, instead of the "Sound Storm SMCM200 MINI 200-WATT MONOBLOCK (I'm going to "try' to make this one work first!), I will try to get this to work on/in a 6.5" Down-Firing Subwoofer (I've got (Recently I purchased) a Logitech 2.1 System without realizing it was a 25 watt System (???) with only 15 watts going to the 4" Sub and you can't believe how great this Sub sounds, cranked up to 3/4 volume you will notice it 3 bedrooms away, when you're trying to sleep!) and beat the Logitech Sub by at least 4x in performance !!
Point being x 2, HOW CAN I CONNECT A MINI-FAN UP TO ANY OF THESE AMPS WHEN THE FANS ARE 12v - 1a FANS ???
A degree in Electical Engineering MATTERS !
Your reply is helpful !!!
Rick - SoCal
Rick S. - Thanks for your comments. So, if I understand correctly, you want to make the high power modification, but you need to get the right voltage to the fan. first, I'd recommend a12v fan. then, assuming a 20 volt supply, a resistor connected in series to drop the voltage to the fan.. that's it. The resistor will probably be 80 to 100 ohms 2 watt for this, depending on the current draw of the fan. That's what I did for 1 of my other amps... ruclips.net/video/PvCATGgXnTg/видео.html . Go 3:18 into this vid and I explain how I connected the fan. This can help you with yours.
Right On.......nice job, well done.
Enjoyed that video.......thanx !
J.a.J - Thanks! :-)
Nice review with plenty of info.. Big thumbs 👍🏻
Thanks! ;-)
Any word on when you're doing that modification? I'm REALLY interested in modifying one of these amps, or modifying my 2020A+ if possible.
Here it is... ruclips.net/video/NsnPGUZEca8/видео.html
I have a .55x.55x.24inchand a .35x.35x.2inch heatsinks and some thermal grease,
will I have to put holes in the board to hold then on.
I don't know any amplifier that you can get the total watts out of it as called out on the product of packaging. Parts Express has a video on this when you look at the item and the person on the video specifies 14 watts x 2. I'm ordering one today because the price is marked down to $24.88. Using it for some 5.25 two-way polk speakers.
Yes, I've seen the Parts Express video of this amp.. spot on.
That TPA3118 chip has a solder pad on its base and is intended to use the ground-plane of the PCB as a heatsink. A PCB properly designed around it (with decently thick copper) _easily_ cools it well enough for maximum output with a c. 18-20V supply, but I assume this hasn't been implemented by Lepai.
The TPA3116 version of the chip is designed to use a heat sink and cope with maxxing out on a 24V supply.
The TPA3110 is the same chip again, but with no facility for heatsinking at all, intended to be limited to c. 12V, and implemented the way Lepai have the 3118 on this board.
You're right. Here's Part-2 to this vid... ruclips.net/video/NsnPGUZEca8H/видео.htmlere, I've installed a heatsink... works great!
M R A Scott , so ur saying the 3116 is the better chip because it's designed to run at 24 volts right ?
Hey, I have a question. If I have a 19 volt, 3 amp power brick, and if I add a heat sink to the amplifier with a fan, will it work with my power brick? I assume that when you were using 20 volts, you had 3 amps. I wonder if 19v 3 amps will work after mod. Thanks.
8Bit Coder , of course it will work, just add a heat sink and cooling fan
Great review , appreciate it.
I have 2
Scosche HD4004 HD Speakers
4 oms 30 wat RMS 120 Peek
will the Lepai LP-2020TI drive both?
What's the highest voltage you'd recommend without any modifications? 19volts?
21v is the max... ruclips.net/video/NsnPGUZEca8/видео.html
I've made a Part-2 to this vid... ruclips.net/video/NsnPGUZEca8/видео.html
What is that ohm's law calculator you are using?
Andy Tejral - Here.... www.random-science-tools.com/electronics/dBm-Watts-volts.htm
Nice review, thank you. So how do you think this amp will behave if i put it in my car and power from the battery at 14.5 volts and drive 4Ω speakers? Do i need in that case to add a heat sink?
Thomas Karagiannis - Thanks. This amp should work ok with 14.5v in the car. It should produce 20 watts rms into 4 ohms without a heat sink with no problems. Just remember not to connect the (-) speaker wire to your car's ground; run speaker wires back to amp.
Thomas Karagiannis no
SHAZBOT NANO NANO come in mork
Thanks for the review , Had 4 of those n malfuction running on 12v 7ah they are a pos
fullpeladas - Can't imagine how they could fail on 12v. Then again, they are cheap. Glad you like the review.