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  • Lepai LP-2020A+ Tripath TA2020 Class-T Hi-Fi Audio Amplifier with Power Supply
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Lepai LP-2020A+ Tripath TA2020 Class-T Hi-Fi Audio Amplifier with Power Supply

by Lepai
| 508 answered questions

List Price: $34.99
Price: $26.75 & FREE Shipping on orders over $35. Details
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In Stock.
Ships from and sold by Amazon.com. Gift-wrap available.
LP-2020A
  • Compact size makes this amplifier great for projects and DIY audio applications
  • 3.5 mm jack allows for easy connection to iPods, cell phones, and all sorts of mp3 players
  • Aluminum enclosure that is lightweight, yet sturdy, and acts as a heat sink
  • Tripath TA2020 amplifier chip provides efficient, powerful sound
  • Economical price and tremendous performance
13 new from $25.00 2 used from $24.91
$26.75 & FREE Shipping on orders over $35. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

Lepai LP-2020A+ Tripath TA2020 Class-T Hi-Fi Audio Amplifier with Power Supply + AmazonBasics 16-Gauge Speaker Wire - 100 Feet
Price for both: $36.57

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Size: LP-2020A
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WARNING:
CHOKING HAZARD -- Small parts. Not for children under 3 yrs.

Product Description

Size: LP-2020A

This Lepai Tripath-based mini audio amplifier is ideal for both home and car audio applications. The amplifier's TA2020 amp chip is a 20W/ch continuous average two-channel Class-T Digital Audio Power Amplifier IC that incorporates Tripath's proprietary Digital Power Processing technology. Class-T amplifiers offer the audio fidelity of Class-AB amps combined with the power efficiency of Class-D amplifiers. The Lepai amp's clean, 20 watt output makes it perfect for most any auto or home audio project or DIY application. Google Lepai TA2020 and you'll find this little amp has been discussed and raved about! Each unit has an RCA Left and Right channel input, or you can use the 3.5 mm stereo input jack for plugging in almost any music source, such as iPods, cell phones, or MP3 players. Convenient spring terminals make connections to your speakers quick and easy! The Lepai mini amplifier has an aluminum enclosure that is lightweight, yet sturdy, and acts as a heat sink to keep the amp running cool. Color may vary.Includes 13V, 3A power supply. Specifications: Power output: 2 x 20 watts RMS ; Input impedance: 47k ohms ; Frequency response: 20 Hz - 20 kHz ; Input sensitivity: 200 mV ; Minimum THD: <0.05% ; Dimensions (D x W x H): 120 x 147 x 42 mm.The power supplies that come with the unit may vary, operating voltage is up to 14.6 V.

Product Details

Size: LP-2020A
Product Warranty: For warranty information about this product, please click here [PDF]
  • Product Dimensions: 4.7 x 5.8 x 1.7 inches ; 1 pounds
  • Shipping Weight: 1.1 pounds (View shipping rates and policies)
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • ASIN: B0049P6OTI
  • Item model number: LP-2020A+
  • Average Customer Review: 4.0 out of 5 stars  See all reviews (433 customer reviews)
  • Amazon Best Sellers Rank:
  • Product Warranty: For warranty information about this product, please click here [PDF]
  • Date first available at Amazon.com: October 28, 2010

Customer Questions & Answers

Customer Reviews

This amp DOES NOT come with a power supply.
P.G.
If you are looking for a small power amp that is light weight, takes up very little space, and sounds really good, look no further.
Jon Norris
No buzz noise. just very low volume of sound with knob turned all the way up.
Linda Eckhardt

Most Helpful Customer Reviews

224 of 259 people found the following review helpful By RoyTech VINE VOICE on March 15, 2012
Size Name: LP-2020A Verified Purchase
This is a clean sounding amplifier with only the controls one really needs. So its great for my parents who don't have the frame of mind to fiddle with too many controls. However, be aware of power supply issues.

1) I bought two of these at different times from Amazon. Both did not ship with power supply - even though they claimed to include them. Amazon has not corrected the product description even after I told them about it.
2) The shipped power supplies were to be a 2 amp one and a 6 amp one in the second case.
3) If you run this amplifier from a 2 amp power supply - here is some news for you. The theoretical max watts your system can deliver would be 12X2 = 24 watts - However, since the amp is running around 80% efficiency - you can get approx 24X0.8 = 18 watts max from this amplifier (best case scenario) or around 9 watts per channel. The problem comes as you drive the amplifier harder. The power supply voltages will start dipping, and as it does so, the amplifier will distort. So your clean sounding amplifier, won't sound so clean after all once you drive it past 7 - 8 watts.
4) To really use this amplifier with low distortion at high volumes, you should use a switching powersupply that delivers 12 to 13.5 volts at 4 amperes. 6 amps is a bit of an overkill, but recommended if you will be using 4 ohm speakers.
5) You cannot use this amplifer with an un-regulated transformer type powersupply rated at 12 volt. Their no-load voltage can be anywhere from 15 - 20 volt and can even be dangerous if connected to this amp - since the supply capacitor is rated at 16 volt.
6) Don't forget the log relationship between perceived loudness and watts - a 100 watt amplifier is only double the loudness of a 10 watt amplifier.
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17 of 18 people found the following review helpful By Anthony DiSante on November 23, 2011
Size Name: LP-2020A Verified Purchase
This little amp is just amazing. If you're even remotely interested in audio, amps, etc, then this is a no-brainer: look at the price, realize that it's only $20, and just buy it.

For me, this replaced a $300 Sony receiver which had served me well for about 4 years, until its right channel suddenly died one day. (Actually, it's not quite dead, but it's permanently stuck at ~5% of the full volume coming out of the left channel.) And this little amp is somehow both louder and clearer than that 100-watt Sony receiver ever was (playing through the same speakers, a pair of Infinity RS3s, which have been going strong for about 10 years).

I'm a music lover with hundreds of CDs, but I wouldn't say I'm an audiophile; however, I have a friend who is, and he's been happily using one of these class-T amps for years.

The only real cons I see with this amp are:

1. Lack of remote control. I plan to eventually get a preamp with remote, so that will take care of it.

2. The obnoxious bright blue LED ring around the volume knob. Unlike many obnoxious LEDs on modern electronics, this one can't be fixed with a small square of electrical tape covering over it. I had to open the amp and desolder the two LEDs from the circuit board to remove them. And it was kind of a pain because they're positioned sort of halfway underneath the volume knob. So that took half an hour or so, but the amp's appearance is much improved by it. Note that the plastic ring around the volume knob is clear, not blue; it's the LEDs that are blue.

Regarding the included or not-included power supply: my amp was sold by Parts Express and fulfilled by Amazon, and it did NOT include a power supply.
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514 of 643 people found the following review helpful By Jon Norris TOP 1000 REVIEWERVINE VOICE on January 15, 2011
Size Name: LP-2020A Verified Purchase
This is a sweet little stereo amp based on T-amp chip technology. It is clean and powerful for its size. It comes with a wall wart power supply, but could also be battery powered if one desired. There are input connections in stereo RCA jacks and a 1/8 inch (3.5mm) stereo plug for mp3 players, CD players, video players, etc.

There is an actual power switch instead of a pot-based switch as on similar models previously offered by Sonic. There are also Bass and Treble controls, which can be quite handy in tailoring the sound a bit to the speakers and space.

I am using these for small PA applications and for desktop computer sound. I have plans to create a small guitar amp setup as well. I have used 6 of these in my "day job" and was so impressed I started buying them for home.

I have driven spot monitors like Carvin PM5-Bs and even JBL 10 inch 3-way studio monitors with these and similar amps, and they work very well, especially for small areas. One of these and a pair of Carvin monitors make for some pretty great desktop computer sound. (Until your cubicle neighbors complain, anyway.)

I haven't done any actual power measurements, but they are claimed to put out 20-25 watts per channel into 4 ohms, and my ears agree that those figures are probably accurate. I have only run them at 8 ohms, and have been pleased with the sound. I currently use one of these and JBL 10 inch 3-way studio monitors to provide computer sound for a 42 person classroom, and the sound is pretty amazing for a $20 dollar amp.

If you are looking for a small power amp that is light weight, takes up very little space, and sounds really good, look no further. Give these a try, I think you'll be impressed, too.

Oh, Parts Express is also great to do business with.
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Lepai LP-2020A+ Tripath TA2020 Class-T Hi-Fi Audio Amplifier with Power Supply
This item: Lepai LP-2020A+ Tripath TA2020 Class-T Hi-Fi Audio Amplifier with Power Supply
Price: $34.99 $26.75
Ships from and sold by Amazon.com