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  • Topping TP21 Class T Digital Mini Amplifier with Headphone 25 WPC
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Topping TP21 Class T Digital Mini Amplifier with Headphone 25 WPC

by Topping
| 9 answered questions

List Price: $68.00
Price: $62.99 & FREE Shipping. Details
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Sold by SHENZHENAUDIO and Fulfilled by Amazon. Gift-wrap available.
  • Tripath TA2021 Class-D/Class-T architecture for clean, efficient sound
  • High grade components provide audiophile performance
  • Ideal for multimedia sound applications
  • Space-saving small footprint perfect for desktop applications
  • Built in pre amp for use with headphones
4 new from $62.99 2 used from $43.00
$62.99 & FREE Shipping. Details In Stock. Sold by SHENZHENAUDIO and Fulfilled by Amazon. Gift-wrap available.

Frequently Bought Together

Topping TP21 Class T Digital Mini Amplifier with Headphone 25 WPC + Micca MB42X Bookshelf Speakers with 4-Inch Carbon Fiber Woofer and Silk Dome Tweeter, Black
Price for both: $142.98

Buy the selected items together

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Technical Details

  • Brand Name: Topping
  • Model: TP21
  • Item Weight: 1.37 pounds

Product Details

  • Product Dimensions: 6.8 x 4.4 x 1.7 inches ; 1.4 pounds
  • Shipping Weight: 2.3 pounds (View shipping rates and policies)
  • ASIN: B005CRLZGE
  • Item model number: TP21
  • Average Customer Review: 4.1 out of 5 stars  See all reviews (52 customer reviews)
  • Amazon Best Sellers Rank:
  • Product Warranty: For warranty information about this product, please click here
  • Date first available at Amazon.com: July 14, 2011

Product Description

The Topping TP21 features the Tripath 2021 Class T chip with 50 watts of power (25W per channel). Sleek design with advanced engineering for performance and longevity. For clean power in a mini amplifier that has headphone amplification, the Topping TP21 amplifier is the logical choice.

Customer Questions & Answers

Customer Reviews

This amp is no worse, which is to say, it sounds great.
R. H. Lee
I figured I'd have more options and could probably get better sound for less money.
Sacha Potter
Out of the box, I am very pleased with its quality and sound.
AJD

Most Helpful Customer Reviews

52 of 55 people found the following review helpful By R. H. Lee on January 16, 2012
Verified Purchase
Solid build quality(*), very good sound, and highly efficient.

I've just replaced my trusty Sonic Impact amp with this one, mostly for the heck of it.

Hooked up to an M-Audio Audiophile 2496 and JBL Control 1x speakers, my (slightly modified) Sonic Impact has been (and still is) a great little amp. When measured using the Dayton OmniMic measurement system, it recorded a perfect straight line except at the low end where the speaker simply did not produce anything. The lack of very low frequency response is, of course, expected from a set of small monitor speakers.

This amp is no worse, which is to say, it sounds great. In fact, this sounds a bit better than the Sonic Impact I've been using, but that could just be me being happy to get a new toy ;)

(*) Now for why I subtracted 1 star.
(1) The case is painted. It is not anodized. Properly anodized aluminum surface maintains its positive properties (good heatsink), whereas painted surface does not. And anodized surface looks better, too.
Does it affect performance? Nah. It'd never get hot enough to matter anyway. I'm just complaining because I expected to see a beautifully anodized black case when I ordered it.
(2) Another issue I had was, out of the box, left channel did not work! Needing to return it was not making me happy. Then I thought maybe the relay for the headphone connection was stuck, so I plugged in a headphone and then unplugged it. Voila! Both channels came alive. Kind of makes me wonder about the quality, but oh well, stuff happens. It hasn't done anything funny after that, so I'll just try to forget the initial glitch.

By the way, I also have a Dayton DTA-100a. It's a piece of junk, and yet it costs more than this, too.
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17 of 17 people found the following review helpful By vqworks on July 17, 2012
Verified Purchase
The Topping TP21 Power Amp is really living proof that cheap yet good quality audio equipment really does exist. While the previous reviews were all quite good, I was admittedly still skeptical. Besides, if you're an objective audiophile who also considers published specifications before purchasing equipment, the power rating is not very impressive. This is especially true when you notice that the 25 watts/channel rating is based on a 4 ohm load at 10% distortion while the 14 watts/channel rating is based on the more conventional 8 ohm load also at 10% distortion. No bandwidth/frequency range is even given with this power rating.

Of course, my curiosity got the better of me and I decided to try this unit because the price was right and my existing AudioSource amp was not working well for the patio speakers. Before ordering I also did a bit of homework and found out that power amplifiers with Class T topology behave very cleanly up until the point of clipping. This explains the ultra conservative power rating with the high distortion.

Having tried the power amplifier sans headphone output, I must say that I was very pleasantly surprised. Driving my somewhat sensitive patio speakers at levels loud enough to interrupt obnoxious conversation, the sound was still incredibly clean. There wasn't a hint of audible distortion and the bass was very full-bodied. To me this means that the patio speakers' 8-ohm load at fairly high volume was not taxing for the TP21 amp so it didn't congest the speakers' mid-bass where impedance load is usually at its lowest. Bravo! The midrange was also very transparent and the highs had a silky clarity without losing any bite.
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7 of 7 people found the following review helpful By ntscdan on October 1, 2013
I'm an audiophile. I won't bore you with all the details but my system is worth than most cars. Listening to what seventy bucks will buy you is pretty sobering.

For the price of a preamp tube you get a single input integrated amplifier that sounds great. It has proper connectors on the back that you won't find on some big box store junk that sells for ten times as much. It's dead silent and the volume control operates smoothly. I'm feeding it via Nordost iKable from a Dragonfly USB DAC plugged into a Mac tower. The speaker cable and bananas are nothing special.

The stated 25W output is with a 4ohm load with 10% THD. A worthless number. Most people are going to be driving an 8ohm load like the JBL Control 1's I have hooked up in which case it delivers 14W per channel but still with 10% THD which is a grim number. However it will deliver a few watts of clean power to an efficient speaker like the JBL which has a sensitivity of 89db. For those that don't know that means you will get 89 decibels of sound from 1 watt at a distance of one meter. So my only caveat for this terrific little amplifier is that you shouldn't expect to drive a pair of inefficient speakers to high levels. Otherwise be prepared to be shocked by the Topping, especially if you're a "golden ears" type.

Even the box that the unit came in was a class act. I bought the unit from Parts Express and would recommend them as highly as the Topping TP21. I'm not much of a headphone listener but it's still a nice option to have. I'm looking forward to experimenting with some better speaker cables and maybe doing something about the power supply...
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