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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
3,130 customer reviews
| 575 answered questions

List Price: $34.99
Price: $22.99 & FREE Shipping on orders over $35. Details
You Save: $12.00 (34%)
In Stock.
Sold by Deeteck and Fulfilled by Amazon. Gift-wrap available.
LP-2020A
  • Enter your model number above to make sure this fits.
  • 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
20 new from $21.99 4 used from $25.00
$22.99 & FREE Shipping on orders over $35. Details In Stock. Sold by Deeteck and Fulfilled by Amazon. 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 - 50 Feet + Sony SS-B1000 5-1/4-Inch Bookshelf Speakers (Pair)
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Size: LP-2020A
  • Buy Used and Save: Buy a Used "Lepai LP-2020A+ Tripath TA2020 Class-T Hi-Fi Audio..." and save 28% off the $34.99 list price. Buy with confidence as the condition of this item and its timely delivery are guaranteed under the "Amazon A-to-z Guarantee". See all Used offers.

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 12V, 2A 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)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • Origin: China
  • ASIN: B0049P6OTI
  • Item model number: LP-2020A+
  • Average Customer Review: 4.2 out of 5 stars  See all reviews (3,130 customer reviews)
  • Amazon Best Sellers Rank: #55 in Electronics (See Top 100 in Electronics)
  • Product Warranty: For warranty information about this product, please click here [PDF]


Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

307 of 324 people found the following review helpful By Correy Samper on December 27, 2013
Size: LP-2020A
I have been using the Lepai amp for almost 2 years. There are good and bad things that I noticed. Below is my summary of the Lepai mini amp:

The GOOD:
1) This amp is really inexpensive. If you cannot spend more than 20 bucks then you may want to take a close look at this amp.

2) The sound quality albeit at low volume is pretty decent. This amp uses the TA2020 chip set which does offer quite low distortion at low volume.

3) The amp has tone controls so you can fiddle with the sound to some degree.

The BAD:
1) You'll be hard pressed to drive a pair of low-sensitivity or 8-Ohm speakers to decent volume with this amp. With an 8 Ohm speaker, you get clean sound to around 5 Watts only. If you crank the amp up to 10 Watts you'll already hit 10% distortion. With 4 Ohm speakers you can get up to 10 Watts per speaker. In fact, the wattage rating of this amp (2 x 20 Watts rms) is truly false. The power supply that comes with this amp gives 2 Amps at 12 Volts. At a power efficiency of 90% you'll get 2 x 10 Watts rms at the most. However, if you have some fairly small speakers then you may be fine. Otherwise, spend a little more and buy another amp.

2) This amp DOES NOT connect to many newer TVs which often no longer have analog RCA outs. Instead you'll either need to get an SPDIF-to-RCA converter or an amplifier such as the Amphony 250 or similar model that has an optical input which is compatible with TVs. My TV luckily does have RCA outs but be sure to check if your TV does.

3) The enclosure of this amp is fairly bulky and not exactly high quality. I opened up the enclosure and found that most of the interior is empty. What a waste of space!
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368 of 406 people found the following review helpful By S K on April 19, 2013
Size: LP-2020A Verified Purchase
After reading some of the other reviews I checked the ac adapter right away. It had a label marked Lepai AC ADAPTER OUTPUT: 12V 2A. I could see that there was another label underneath, so I peeled the silver Lepai label off and the black label underneath was marked TennRich AC ADAPTER OUTPUT: 12V 1.5A. I checked the amps on the adapter and it was 1.5A. That is why the amplifier is underpowered. I posted a picture of the adapter. Right now the picture is at the end of the list of pictures. It's just bad business to falsely relabel a product! I will try and contact the company and see if they will ship me a real 2A adapter.
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281 of 321 people found the following review helpful By RoyTech VINE VOICE on March 15, 2012
Size: 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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348 of 403 people found the following review helpful By Martin Lange on January 8, 2014
Size: LP-2020A
This amplifier is shipped with a 12 Volt power supply. If you are somewhat knowledgeable then you can do the math and figure out that given the 12 Volt supply voltage this amp can deliver without an excessive amount of audio distortion:

- 2 x 18 Watts with 4 Ohm speakers, and
- 2 x 9 Watts with 8 Ohm speakers.

If you further look at the current rating of the power supply then you can figure out that in fact the maximum wattage is 2 x 10 Watts regardless of the speaker.

Some other reviewers have suggested swapping the power supply with another one that has higher current to boost the power rating. However, since the supply voltage is fixed it wouldn't help at all if you are driving 8 Ohm speakers. You are still limited to a maximum of 9 Watts. To get more wattage, you'll need to look at another amp. Below I have listed some of the more popular mini amps on Amazon. I have ordered the list according to their cost. You can see the power supply voltage of each amp and the maximum wattage when driving 8 Ohm speakers:

- Lepai LP-2020 ($17): 12 Volts - 2 * 9 Watts @ 8 Ohms
- Amphony 200 ($69): 36 Volts - 2 * 20 Watts or 1 * 80 Watts @ 8 Ohms
- Topping TP20-MK2 ($70): 14 Volts - 2 * 12 Watts @ 8 Ohms
- Dayton Audio DTA-100a ($96): 24 Volts - 2 * 30 Watts @ 8 Ohms

I hope my review will help in your amplifier selection.
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