LP-2020A+ Lepai Tripath Class-T Hi-Fi Audio Mini Amplifier with Power Supply - Hi guys, this time I will try to describe and review the products LP-2020A+ Lepai Tripath Class-T Hi-Fi Audio Mini Amplifier with Power Supply, maybe any of you who are looking for the best products, so please feel free to buy it by pressing "Goto Main Store" at the bottom of this article. We also have set up a tutorial step by step how to buy this product until the product LP-2020A+ Lepai Tripath Class-T Hi-Fi Audio Mini Amplifier with Power Supply really have to buy from here.
Actually, this product has been widely known and indeed very hard sell in the market, but never mind I will review it again, probably there among you who do not know about this product LP-2020A+ Lepai Tripath Class-T Hi-Fi Audio Mini Amplifier with Power Supply.
This is a picture of a product LP-2020A+ Lepai Tripath Class-T Hi-Fi Audio Mini Amplifier with Power Supply that I took from the real source, so if you want to buy this product by pressing the "Goto Main Store" that exist under this article then you will get the products as shown below :
LP-2020A+ Lepai Tripath Class-T Hi-Fi Audio Mini Amplifier with Power Supply Rating :
Customer Reviews
Most helpful customer reviews
115 of 130 people found the following review helpful.
Throw away the AC adapter!
By Mojave Bob
For the first couple of weeks, I hated this amp. Connected to my Denon speakers, it has terrific sound, and seems well built, but it had this nasty buzzing sound that drove me up the wall whenever the amp was on but nothing was playing loud enough to drown out the buzz. If you read the reviews on this amp, many, many people complain that there is no power adapter included. Then, you will find some comments that they are including a Vonage power adapter with it now. You will also find some complaints about an annoying buzzing sound. Well, my friends, the buzzing noise comes from that Vonage power adapter. If you provide your own 12v power supply, it works great and has very clean sound. I thought about returning this unit, but I can't get anything comparable for even twice the price, and 12v adapters just aren't very expensive. In my case, I had one just sitting around, and was delighted with the result. The amp is a keeper, the Vonage power supply is a tosser.
82 of 94 people found the following review helpful.Just be aware of power supply requirements
By B. Roy
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. So this amplifer does fine to fill up a room with sound using reasonably high efficiency speakers (I am using Bose 301's). Just don't expect to pump your subwoofer with it!
7) There are two LED's inside. Not sure why only one of them lights up (in both the amplifiers I purchased).
8) Its tone control implementation can do with a bit of improvement.
458 of 556 people found the following review helpful.
great little amp - UPDATE - August 2011
By Jon Norris
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.
UPDATE: August 2011
In the interest of clarifying the power output capability of this amp (which has caused some contention - see comments), I am re-producing the stats for the TA2020-20 chip from Lepai's own spec sheet, which is freely available on the web.
"The TA2020-020 is a 20W (4ohm) continuous average per channel Class-T Digital Audio Power Amplifier IC
using Tripath's proprietary Digital Power Processing (DPPTM) technology. Class-T amplifiers offer both the
audio fidelity of Class-AB and the power efficiency of Class-D amplifiers."
"Class-T architecture
Single Supply Operation
"Audiophile" Quality Sound
0.03% THD+N @ 10W 4ohm
0.1% THD+N @12W 4ohm
0.18% IHF-IM @ 1W 4ohm
High Power
25W @ 4ohm, 10% THD+N, VDD=14.6V
22W @ 4ohm, 10% THD+N, VDD=13.5V
13W @ 8ohm, 10% THD+N, VDD=13.5V
High Efficiency
88% @ 12W 8ohm
81% @ 20W 4ohm
Dynamic Range = 99dB
Mute and Sleep inputs
Turn-on & turn-off pop suppression
Over-current protection
Over-temperature protection
Bridged outputs
32-pin SSIP package"
"APPLICATIONS
DVD Players
Mini/Micro Component Systems
Computer / PC Multimedia
Cable Set-Top Products
Televisions
Battery Powered Systems"
The diagram with power to distortion curves is even more instructive, and I will try and add a jpeg of that so people can judge for themselves if Lepai is lying about the specs.
Are they fudging a bit calling this a 20 watt per channel amp? You could certainly make that case, given that they are quoting those specs at 4 ohms and 10 percent distortion, which is more distortion than most people would find acceptable in an audiophile application. Is Lepai pushing it a bit? Yes, but no more so than most consumer amp companies, or virtually ALL computer speaker makers, none of whom quote accurate specs for their systems.
I have been told by tech support for a well-known, widely sold PA amp manufacturer that they considerably over-spec their amps - their 120 watt amp can only be driven to 80 watts; if you go beyond that they WILL fail (which ours had done). Yet, they still sell the amp as a 120 watt amp and no one sues them. Lepai is not fudging anywhere near that badly, and they publish the actual specs for all to see. Carvin is the only company I have found to be truly honest about amp specs (although there may be others). Lepai at least gives one the specs so one can see how much they are fudging.
Are there applications where 10 percent distortion IS acceptable? Certainly. Some small PA and background ambient systems would be fine with that level. Obviously, listening to pristine recordings of orchestral music would NOT. A great deal depends on program material, speaker quality, and application. For most applications, 10 percent is not acceptable.
Again, I run these amps at 8 ohms through efficient speakers (Carvin PM-5B and JBL studio monitors), and find them to be very good performers FOR THE PRICE. I would not recommend running them into 4 ohms, unless you intend to keep the power level down.
At 8 ohms, per their device curves, you can hit 10 watts per channel and stay near or under 1 percent distortion - which is the definition of "High Fidelity" by international standards, and beyond which the normal human ear cannot discern any further lowering of distortion, according to some. At 4 ohms, you can get close to 18 watts per channel and still remain under 1 percent. Is it fudging to call an amp that produces 18 watts per channel at 1 percent distortion a "20 watt amp?" Not by much, and certainly not by the usual standards of most manufacturers. NOTE that with the stock power supply, 12 volts at 2 amps, you could not possibly get more than 12 watts per channel, if it were a perfect world (which it is not). A beefier supply would be required to get closer to those rated specs for the chip in this amp. Personally, I would call this a 10 watt amp, not 20. More and more vendors are adding the channel outputs together, rather than giving the per channel output, which has been standard practice in the stereo world.
Even so, I find these to be very useful little amps, and will continue to buy and use them as long as they are available. If you cannot afford the rather modest price to find out, then don't risk your money. If you want a good performing amp for the price of a few lattes, then go for it. I think you will be happy with these. If you are looking for an amp for your Home Entertainment system, I think you will want something with a lot more power. These are small amps for small jobs.
Also, if you have a power supply failure, which I did have with one of these amps, Parts Express has very good replacements for a very good price. Parts Express is a very good vendor, and I have bought from them for many years. I bought all 7 of the amps I have used from Parts Express.
Still highly recommended.
Here is a description and product detail of the product LP-2020A+ Lepai Tripath Class-T Hi-Fi Audio Mini Amplifier with Power Supply, please read the to ensure that you actually purchasing the items you want.
Product Description
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.
Product Details
- Amazon Sales Rank: #70 in Receiver or Amplifier
- Color: Black
- Brand: Lepai
- Model: LP-2020A+
- Dimensions: 1.70" h x5.80" w x4.70" l,1.00 pounds
Features
- This special purchase Lepai Tripath-based mini audio amplifier is ideal for both home and car audio applications.
- The TA2020 is a 20W/ch continuous average two-channel Class-T Digital Audio Power Amplifier IC using Tripath's proprietary technology.
If you are interested in purchasing this product please click "Goto Main Store" below and follow the steps until you actually have to buy LP-2020A+ Lepai Tripath Class-T Hi-Fi Audio Mini Amplifier with Power Supply product.
ATTENTION : You will buy LP-2020A+ Lepai Tripath Class-T Hi-Fi Audio Mini Amplifier with Power Supply from Amazon site, which the site has been very reliable and has served thousands and even tens of thousands of purchases and sales each day.
How to Buy LP-2020A+ Lepai Tripath Class-T Hi-Fi Audio Mini Amplifier with Power Supply
1. Click "Goto Main Store" or click here
2. You will be redirected to a landing page that contains all of the products LP-2020A+ Lepai Tripath Class-T Hi-Fi Audio Mini Amplifier with Power Supply, and then click "Buy NOW!" (see picture)
3. Again you will be redirected to the purchase page, You will see product LP-2020A+ Lepai Tripath Class-T Hi-Fi Audio Mini Amplifier with Power Supply with a fuller and more pictures about this product. See the right side of the purchase page
If you would like to change the quantity of the item, Click the drop-down and select your quantity, then click "Add to Cart" Button
4. Then click the "Proceed to Checkout" if all the items in your cart are updated to the right quantity.
5. Please sign in with your Amazon account by entering email and password. If you feel you do not already have an account on amazon, just enter the new email in the email box and moved the option "I am a new customer". Then click on "Sign in our secure server".
For those of you who do not have Amazon account please register first finish
6. Then on the next page, fill in all fields.
Ensure that all information is correct. This includes the billing address, shipping address, payment accounts, credited amounts, etc.
- If not, you may click "Change" button that is located underneath each section.
- If you like to remove an item from your Shopping Cart, Click the "Change" button to this item quantity. Type "0" into the quantity. Then click the "Continue" button to save this change.
7. I think here you have to understand how to buy LP-2020A+ Lepai Tripath Class-T Hi-Fi Audio Mini Amplifier with Power Supply, because the next step will be the same as when you are buying online at other stores.
8. Congratulations youve managed to buy LP-2020A+ Lepai Tripath Class-T Hi-Fi Audio Mini Amplifier with Power Supply from here.
No comments:
Post a Comment