Topping DX3 Pro USB DAC Headphone Amplifier DSD512 32Bit/768kHz XMOS XU208 APTX Bluetooth Optical Coaxial Stereo Audio Amp Decoder

It is very similar to TP30 in appearance, but in reality, its functionality is close to TP32 with no display (LEDs as state indicators) and no remote, but with ~20% more power (12V vs. 14V power supply), higher resolution 96K/24 DAC. Same as TP32 : Separate Headphone amp (dual amps), digital controls, auto on/off via USB, kind of important when used with computer and it does work. 96K/24 DAC is good for someone with 96K/24 music collection, otherwise it will put more load on CPU (~1%) to handle up conversion without much of any benefits for 44K/16 music collection.Some difference on DAC implementation (TP32 vs. VX1):1. TP32 allows volume level adjustment on computer and amp. VX1 allows to change volume level on amp and OS on Windows, on Mac you cannot adjust volume on OS, mute works though.2. TP32 allows frequency adjustments: 48K|44K|32K/16. VX1 is hard set to 96K/24.It is great unit, if you need little bit more power to drive less efficient speakers or larger room. The volume level wise - VX1 will give you same volume level @ 50% vs. TP30/TP32 @ 60%.For reference (TP32 w/Micca MB42X via USB DAC): Bob Acri "Tribute To Buddy" will deliver crystal clear sound @ 85% Volume @ 3.5ft: average @78db, peaks @86db.Another improvement: VX1 power LED is "breathing" when computer/amp is sleeping, TP32 has no indication of sleeping - it just turns amp and display off - it simply has nothing to "show off" during sleep :-).Just an observation, Topping amps seem to have less sensitive inputs and most likely the correct sensitivity levels. Input levels are also consistent between Analog vs. USB. For example, Lepai LP2020A+ seems to have more sensitive inputs, but then you will overload amp at high volume levels easily. No way you will listen to Lepai @ 85% volume level, amount of distortion will force you to back off the volume level.Little bit of advise: do not cheap out on speaker wire - use 14-gauge Oxygen-Free Copper Speaker Wire.I am using VX1 paired with Pioneer SP-BS22-LR via USB DAC in the small office, so far I am very happy. TP32 had some trouble to keep up with Pioneer with its puny 15WPC. VX1 matches Pioneers perfectly and I have no reason to push volume above 50% level. A great pair.BTW, I have tried to swap power supply on TP32 (14V), but it did not have any effect in output level. Save yourself time, do not bother with 14V PS on 12V gears. Internal voltage regulator will lover 14V to 12V, so it is pointless.Note: I was referring to Mac/Hack as computer initially. Later, I had a chance to use it with PC. It was fully automatic, Windows automatically selected it as default audio output device. There is a way to adjust bit rates in control panel advanced speaker properties, but changing rates is only allowed for TP32 (possibly TP30), with VX1 there is nothing to adjust really. All figures are measured with Radio Shack Sound Level Meter (33-2055).

Because of the good reviews I bought this as an alternative to the Lepai LP-2020 (which I have in my office at work).When I first hooked up the Topping the sound seemed muffled, with a lack of presence. To get reasonable volume I had to turn the volume knob almost all the way up. Since this amp is well regarded I figured it was just been my imagination, and didn't think anything of it.Tonight I brought the Lepai 2020 home from the office and did an A/B comparison of the two. The Lepai produces MUCH greater volume and the sound is noticeably clearer. The difference is like night and day, or like the dead of a Siberan winter versus the peak of a Mediterranean summer. So it wasn't my imagination at all.Looking more closely at the reviews shows a couple of other people have gotten duds. I'd expect better quality control than the el-cheapo Lepai but the percentage of lemons seems comparable if not higher than the Lepai. Giving it three stars instead of one or two because it does pass signals, and I cannot objectively disprove that it delivers its rated power.Thank goodness for Amazon's consumer-friendly return policies.

Great amp in many ways. Topping really thought this through. It's a shame that more higher end amps/dacs don't have this combination of features.It is thoughtfully designed, and a beautiful addition to your desk with its brushed aluminum case. Five stars. However, thereis just one negative. I noticed that the output is not as clean as other more expensive units. I've done most of my listening tests via headphones, comparing the headphone jack on the Audioengine D1 versus connecting the D1 line-out -> VX1 line in and then connecting my headphones to the VX1. I noticed that there was some distortion in the base, and that the unit didn't reach as high into the treble. Also, there wasn't quite as much stereo separation. This wasn't as pleasing to my ears. So -1 star for that.These are minor niggles though, I really recommend this unit.Pros:1/4" headphone jackbuttons for switching between speakers, headphones, and speakers+headphones. Leave your phones plugged in all the time!USB DAC and AUX in, with a physical switch for themVolume knob has position indicatorAuto On/Off by USBPop/click supression during power on/power off and when unplugging headphonesVery low noise via USB or AUXExcellent price/performanceUSB device doesn't disappear from Mac device manager when powered downConsHeadphone amplifier is not quite as good as the top end products like AudioengineSame for the DAC

El amplificador Topping VX1 tiene muy buen acabado y materiales de primera. Se ve bien y se escucha bien. El tamaño es adecuado para estar en escritorio o como parte de un sistema stereo hifi. Se puede utilizar como convertidor digital / analógico usando el USB o con entrada de línea. El amplificador de 25w tiene salida stereo con conectores de banana. Lo conecté a un par de bocinas Dayton B652-AIR y se escucha muy bien. Una ventaja adicional es que se puede escuchar con audífonos. En ambos casos el sonido es limpio y cristalino. El único detalle que no me agrado es que el cable de la fuente de poder llegó con una clavija qué no corresponde a la usada en USA o México.

Good amplification and clean sound. My only quibble is that they do not power on and off with the USB. With no USB input, there is a slight hiss from the speakers, meaning they must be turned off manually. However, there is no hiss when the USB is active.I have this connected to a pair of AudioEngine P4N speakers and supplied from a USB port from the dock for my Lumia 950 (using Continuum). I connect the phone and the sound comes out through these.I do like the button to switch between speakers or headphones (or both) so that I don't have to unplug my headphones if I don't want to use them.

Wanted hi-fi sound from my computer. Bought this amp to drive a pair of Sony SS-B1000 bookshelf speakers. So far, so good.-Solidly built, small footprint-Controls are simple and logical-Flexible; will accept either a digital or analog output from the computer-Plug 'n play. Loaded the drivers automatically. I only had to change the default sound device via the Windows Control Panel-Sounds great. Drives the speakers well enough to get more than enough level in a den-sized room.-Great price.Time will tell how reliable it is.

Did everything I wanted it to. Drives my M50x's with no problems. Delivers crisp clear sound and is a big difference from onboard sound. I love the ability to connect more than one input as well as the ability to connect speakers as well as headphones. Overall a very versatile unit that is great for someone like me who is new to high quality audio. Would recommend

As described,, on time