tp21 Topping Mini amplificateur numérique classe T avec 25 WPC Casque
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- Module amplificateur de casque intégré, peut convertir automatiquement lorsque la prise pour écouteurs
- Condensateur intérieur de Haute capacité (3000x2 220 * 5 = 7100uF), prend en charge les besoins dynamiques et améliore le son de l' interrupteur de l'adaptateur d'alimentation
- Protection de haut-parleur, brache le circuit à retard, afin d'éliminer le bruit sec de commutation
- Composants assemblés HIFI professionnels
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Descriptions du produit
Le TP21 Topping est un classe T Amplificateur intégré, basée sur le chipset TA2021. La puce utilise une sorte de «Puissance de traitement numérique", c'est, plus ou moins, un amplificateur de classe D avec des propriétés de commutation à haut débit. Op amp d'écouteur intégré, supporté des casque de charge d'impédance 16 Ohm~200 Ohm, le haut-parleur peut être coupé automatiquement lorsque la prise d'écouteur branchée. 3000x2+220x5=7100uF Super grande capacité avec châpeau ELNA «Pioneer» de grade audiophile, ESR très faible et la réponse à grande vitesse est beaucoup plus clairement en détail et plus énorme de basses profondes. Composante de haute qualité, Résistance Dale, Châpeaux ELNA, contrôle de volume ALPS, PCB de couche d'or, prise RCA de cuivre pur Haut-parleur à haute sensibilité (plus de 86dB). Son exceptionnel et clair. TP21 Paramètres: T-Amp IC: Tripath TA2021: Puissance de sortie 2 x 25W @ 4ohm, 2 x 14W @ 8ohm Rapport signal sur bruit (SNR) 98dB Gamme dynamique 100dB IHF-IM Distortion 0.1% @ 1W, 4ohm THD Distortion 0.03% @ 9W, 4ohm 0.1% @ 12W 4ohm 0.1% @ 7W 8ohm 10% @ 25W 4ohm 10% @ 14W 8ohm Efficacité de l'alimentation 81% @ 25W, 4ohm, 88% @ 13.5W, 8ohm Sensibilité d'entrée 200mV Audio IN RCA (Gauche / Droite) x 1 Prise de courant(5.5mm/2.1mm) x 1 Sortie Haut-Parleur (Gauche) x 1 paire (+ / -) Haut-Parleur (Right) x 1 paire (+ / -) Prise casque 3,5 mm de sortie x 1 Voyant d'alimentation (LED Bleu) x 1 Alimentation entrée DC 12V~14.6V 5A Dimensions (W)113mm x (H)43mm x (D)172mm Poids 620g
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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. To be sure, this is a lot of praise for what I heard through patio speakers but these speakers are very expensive for patio speakers and they have wide bandwidth for their size (47Hz - 20kHz, ±3dB).
Another reviewer commented on a loud click when turning the TP21 on. I didn't notice this with my unit. In fact, each time I powered on or off I noticed that an internal relay kicked in apparently to mute amplifier thumps from power surges (exactly what you'd expect from a decent home amplifier or receiver). So my experience was all good. Yet another reviewer stated that the left channel wasn't working until he plugged and unplugged the headphone jack. Well, I may be lucky because I didn't experience that either. Of course, quality control kinks may have also been ironed out since the older reviews.
I have nothing but admiration for this power amplifier. This power amp can be used for so many applications. I can picture using it for a homemade mini-stereo with a passive source switching device and a pair of audiophile speakers. Couple this setup with a Korora phono preamp, a high-end turntable and a CD player and you have a complete analog and digital source setup.
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. It has an awful circuit board design and assembly quality, and sounds way off. I actually bought that about a year ago to replace the Sonic Impact, but after one listening, I immediately put the Sonic Impact back. This time, though, Sonic Impact can finally retire to a secondary use.
Update (2012-01-28): I succumbed to temptation and bought a TP20 Mark II also.
I uploaded a bunch of comparison images for all to enjoy.
Using the exact same power supply and speaker pair, the first thing I noticed is that the TP20 Mk2 has much more idle noise. I can hear the hiss when I get my ear to about a foot from the speakers. In comparison, I hear nothing with the TP21 connected. Interestingly, the loudness of the hiss does not change with the volume control, so it is literally the noise floor for the amp. It bothers me a little, but it might be because I bought the TP21 first.
As for the sound quality, I'm tempted to say that TP20 has a nicer sound (despite the higher noise floor), but my ears aren't some sort of precision digital measurement devices, so who knows? I just feel that TP20's sound is ever so slightly softer (less irritating), yet with good punch anyway. But as I keep saying, even if it were true, it's all pretty subtle.
Which one would I buy? Duh. I bought both! Which one would I recommend? *shrug* Now everyone's going to vote my review as "unhelpful." But no really, I don't know! Aah, if I had to choose, I guess I'll pick TP21. But I might change my mind tomorrow.
Here's a sound assessment
I can really hear the effects of the audio grade caps and resistors in the signal path. The sound is smoother and more dimensional thanks to these components. So in a way, this amp does sound similar to much more expensive audiophile amps. Right away upon powering it up, I could hear spaciousness and clarity in voices that surprised me for a 70$ amp. The amp does have a very low noise floor and offers good detail and transparency, but of course it is not as good as the 2 channel amps approaching 4 digits. The sound is very clear and balanced throughout the audio spectrum, I watch a lot of movies with this amp and it never lacks on dialog intelligibility. Sound effects and instruments and clear and colorful, which lends to very low listener fatigue. I would describe this amp as musical or colorful, which to me means you do not miss out on anything. Or it just means the opposite of "dull". you hear the occasional raspiness of the violin strings, but you also hear the smoothness of the note, from the low end to the top.
I compared the sound of this amp to a Qinpu a6000 mk2. The tube is more powerful, has slightly better dimensionality, and has more tangible sound. But the highs are rolled off significantly. The topping has lower distortion and slightly better transparency, but the overall sound is far better for me because of the present and sweet highs the topping is good at reproducing. Everything sounded more real with the topping, including pianos, voices, and sound effects such as breaking glass. At worst the qinpu could sound a bit dull with some material. Although I did not really critically review the headphone outputs, I listened for about 10 seconds, the topping easily trumps the qinpu for headphone out functionality and SQ. In conclusion, if I had to listen to a record such as the doors, I would pick the qinpu, the better dimensionality makes an older recording such as the doors, or a mono movie more interesting to listen to. But if I had to watch a contemporary film or more modern record, I would definitely go with the topping because it can reproduce the more dynamic modern sound tracks better. Interestingly, I prefer classical music on the topping because things tend to sound a bit more real. I think most people tend to think a classical recording is not complex material, but the instruments do require a lot of tweeter to reproduce, so the rolled off highs of a tube amp just do not cut it for me, even on jazz or classical.
Despite some comments in the reviews, I would not say that the topping is too forward in the highs, but it might seem that way if you play it to its limits, because the midrange tends to fall apart, distort, and become thin, which could lead to a perception of an aggressive high end. My speakers are custom made, but I would compare the sound and quality of crossover components to a high end bookshelf speaker, such as vienna acoustics. My speakers do have a very flat response from the midrange to the high end. So their are no inherent peaks and valleys in their response. If you believe your speakers are bright, or do not like the sound of the tweeters, maybe a tube amp like the qinpu would be better for you.
The amp never becomes warm to the touch, and draws very little power, less than 4 amps. The topping just worked for me better than the qinpu, the sound is better with my speakers and room. Plus I like the fact that it is so small and efficient.
My signal chain is as follows: iMac USB out => Schiit Modi DAC => TP21 => Energy C100 speakers. All with high quality interconnects and speaker wire. First the good. The TP21 is small but packs a lot of volume. Especially for efficient speakers. My C100s are not the most efficient speakers out there, probably middle of the road, but the TP21 has more than enough amplification to get loud. The sound quality is great, really transparent and crystal clear amplification. Another quality I really like is that this amp has a very low noise floor. When I crank the volume to 100% with no audio playing, I hear absolutely nothing. The build quality is superb and by the looks of the inside Topping uses quality components.
Now for the not so good. The headphone out is good but not great. A minor complaint because any serious headphone listener would get a dedicated headphone amp anyway. A second very minor gripe is the 4 rubber feet on the bottom are not exactly level which causes a slight wobble. But now I'm nit-picking.
If you're looking for a desktop amp, or small amp to power bookshelf speakers, the TP21 is worth looking at.
Just for a test, I replaced this unit with a dayton dta-120, to see if there would be much of a difference. I have micca mb42x bookshelf speakers. The difference was like night and day! On the topping, I have to keep the knob at 75-100% for decent volume, and even then the sound gets hissy. With the dayton, my speakers get much louder than the topping can at only 40% volume, and I think it sounds way better.. a lot more clearer, no hissing or distortion. It almost sounds like different speakers. I've since kept the dayton as my main computer amp. I'm not sure what I'll do with the topping at this point, as it's too late to return it.