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Dayton Audio DTA-100a Class-T Digital Amplifier 50 WPC (Black) (Discontinued by Manufacturer)

3.6 out of 5 stars 120 customer reviews
| 7 answered questions

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  • Automatic switching 3.5 mm input jack allows you to select audio sources quickly
  • Provides superb, audiophile-quality sound - less than 0.01% THD @ 30 watts
  • 1/4" headphone jack facilitates use as a high fidelity headphone amplifier
  • Compact extruded aluminum housing with thick black anodized faceplate
  • Short circuit, thermal, and overload protection ensures worry-free operation

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Technical Details

  • Headphone output
  • Front panel line input

Product Description

Clean-sounding, efficient, and versatile, Dayton Audio's DTA-100a packs audiophile-grade sonic performance into a package just slightly larger than pocket-sized! The DTA-100a utilizes the Tripath TK2050, a high-performance chipset that delivers 50 watts of continuous power per channel (100W total) into an 8 ohm load. The Dayton Audio DTA-100a's Class-T mini amplifier circuitry offers the audio fidelity of a Class-AB amplifier while providing the > 85% power efficiency of a Class-D design. This compact powerhouse also features a convenient front-mounted 3.5 mm stereo input for quick connection of iPods, MP3 players, and other portable audio devices. A rear-mounted RCA-type line level input is also provided for permanent connection of larger devices such as CD players. Speaker output connections are high-current banana plug receptacles spaced on 3/4" centers and compatible with standard double banana plugs (sold separately). High quality screw-on banana plugs that will accept 10 to 18 AWG wire are included. The DTA-100a also doubles as a high fidelity headphone amplifier that will drive any headphone easily, and delivers colossal sound stage from 20-20,000 Hz with a signal-to-noise ratio of 103 dB (A-weighted). The 1/4" stereo jack simplifies connection of larger home and studio style headphones. An adapter is also provided so smaller 3.5 mm personal-style headphones can be used. The amplifier comes complete with a world compatible power supply and its associated connectors. Dimensions: Faceplate dimensions: 1-29/32" H x 3-3/8" W x 5/16" D; Body dimensions: 1-3/4" H x 3-1/8" W x 4-5/8" D; Overall dimensions: 2-1/8" H x 3-3/8" W x 5-1/2" D (feet, faceplate, and volume knob included).

Product Information

Product Dimensions 5.6 x 3.4 x 2 inches
Item Weight 2.8 pounds
Shipping Weight 3.3 pounds
Manufacturer Dayton Audio
Item model number DTA-100a
Customer Reviews
3.6 out of 5 stars 120 customer reviews

3.6 out of 5 stars
Best Sellers Rank #326 in Electronics > Home Audio & Theater > Home Theater Systems > Receivers & Amplifiers > Amplifiers
#1,561 in Electronics > Home Audio & Theater > Stereo System Components
Date first available at December 15, 2010

Warranty & Support

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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

By Lawrence H. Bulk VINE VOICE on June 25, 2011
I have owned a Dayton Audio DTA-100 (the original version) for a year now and, just two days ago, I received this Dayton Audio DTA-100a Class-T Digital Amplifier 50 WPC, the upgraded version.

I am as pleased as is possible with both of them. The sound quality produced by these amplifiers is nothing short of amazing.

Both versions use the Tripath TK2050 chipset which offers extremely - and I mean extremely - clean and neutral sound (at its true high fidelity rating of 30 W/Channel) plus very high electrical efficiency (> 85% claimed). It is as 'green' as it comes.

I had written to Parts Express asking them to tell me the difference between the -100 and the -100a; their technician's reply was that the new -100a has an improved headphone amplifier circuit; nothing else has been changed. I wouldn't know about this - I do not often listen to music through headphones and I have never tried using headphones with either of these amplifiers.

Via loudspeakers, the sound produced is the same with both models. And, as stated, it's just great!

I have read where 30 W/channel is "not enough" power. I disagree with that statement; how "loud" music sounds is a function of the sound amplifier power, true to some extent, but it is much MORE a function of the efficiency of the speakers used in conjunction with that amplifier.

Connect a pair of Klipschorns (sensitivity of 105 db/1W/1M - the most efficient speakers ever made - I own a pair) to a 30 W/channel amplifier and that system could "blow you out of the room" (maybe out of your house - maybe even off your block!).
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This incredible little amplifier has allowed me to assemble a very good sounding stereo system for just over $500. Back in 1990, I was an audiophile always looking for better sound. I had about $6000 into a system that sounded extremely good. I had Apogee Stage planar speakers, a rather large Vandersteen powered subwoofer that reached all the way down to 20Hz, B&O preamp and amp, a top of the line turntable and cartridge, an excellent CD player, and a very good quality cassette deck. The system was carefully voiced to the room and there were patches of sound absorbent material on the walls to quell reflections. There were people who spent more, but I was very happy with the system and everyone who heard it was duly impressed. $6000 in 1990 would be $10,000 to $12,000 today. Because of personal circumstances, I dropped out of the audiophile hobby in 1995 and gave the system to a close friend's son. Recently, I got tired of listening to music through portable players and decided to set up another system. I was a lot older and had many other things that took priority financially. I decided to see if I could set up a cheap two channel stereo system that had reasonable sound. I had heard of the Tripath chip sets that allowed manufacturers to put together an incredibly small, low powered amp that was very musical in its sound. These chipsets were supposed to have a wide soundstage, tight bass and clean and well defined treble. Using them, manufacturers built variants of a Class D amplifier that were very small yet very musical. Because they all used the Tripath chip sets, they named them Class T amplifiers (but they are just a variant of a Class D amp). Class D amps are very green. They are super efficient and use 85 to 90% of the electricity to generate power. They only waste 10 to 15% as heat.Read more ›
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While it worked, Dayton Audio DTA-100a was an excellent medium-power stereo amplifier. It was very neutral and produces a much more detailed and clear sound than my old Sony receiver. An additional benefit is that it is light, hardly takes any space, and accepts world-wide voltage (110-240 Volts). It used to drive a pair of my Mission 772 speakers just fine, even though the speakers have relatively low sensitivity (sensitivity 85 dB, impedance 8 Oh, recommended amp 25-100 W). Note that DTA-100a specifications claim low total harmonic distortion (THD < 0.01%) only for output power up to 30 Watts (thus, you effectively have 30 Watts instead of 50 Watts per channel, two channels in total). The amplifier's manual says that the speaker impedance must be at least 6 Ohm (otherwise you can check a less powerful Dayton Audio DTA-1 amplifier, also sold on amazon).

Dayton DTA-100a is a type T amplifier, it is a new technology. I bet that in few years, as this technology develops further and T-amps become more powerful, makers of old-style heavy and bulky amplifiers will have hard time selling their "dinosaurs". Note that this is a review for DTA-100a, not an earlier model DTA-100 (DTA-100 has a slight channel imbalance problem, DTA-100a does not). You can also find a detailed review on the web by searching for "Dayton Audio DTA-100a - class D integrated amplifier".

USEFUL HINT: if the amplifier's power indicator blue light is annoyingly too bright for you (as it was for me), then use a small piece of dark paper and a duck tape to cover and dim it.

P.S. Failed after a month (one of the audio channels died), but I got a replacement and I am still happy. They should had made it more reliable even if it would have cost little more money.

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