Picture of the setup attached. Hardly an acoustic paradise down here, but at least the Snells make everything sound fun. In fact the amp is using exactly the same components as the SMSL DA 9. The design is just different. Notice that I've turned on the "Peak" tracing as well to capture the highest values across the 8-average readings. Not unusual to see some 60Hz mains hum with harmonics getting into the measurements with unbalanced connections. We're basically looking at -110dB RCA and -120dB XLR noise floor and distortions otherwise.

Subwoofer output level..............................................................................2Vrms Low pass cutoff frequency...................................................................70~200Hz AAC ..............................................................................16bit/44.1 kHz_320kbps Built-in multiple EQ modes and high/bass adjustment functions to easily match various speakers and music;

Most read over the last year...

aptX .............................................................................16bit/44.1 kHz_352kbps So, I'm very happy so far! I'd love to know how this measures. Or maybe not, 'cause I'll be slightly sadder if it bombs. Channel separation .....................................................................................90dB You have the possibility to adjust the bass / treble, the amp also has some presets, I'm not a fan of it, I left it in "direct" mode. SNR ..........................................................................................................103dB

Since I own almost all TPA325X in the market and some Hypex Ncore and Purifi at home, I can tell you that it is pretty good even very good in comparison ... for the little that I have heard. Initial impressions are great. No noise that I can hear (disclaimer: I'm in my early 50s). It's driving these speakers with plenty of volume, and I haven't tried to really push it yet. At about 30 min of steady medium-high volume it's cool to the touch. Bluetooth specification...................................................................................5.0 SBC ..............................................................................16bit/44.1 kHz_328kbpsI'm running in bluetooth right now, just because I don't want to haul too much stuff down here tonight. Connecting was easy/normal w my Samsung phone. Unfortunately this phone doesn't do Aptx HD, so I can't test that. As we end off Part II with a detailed look at PCM fidelity, I can say that from an objective fidelity perspective, basically what I'm seeing is an ESS ES9038PRO-based DAC that's performing on par with the best devices available today as published here and on other audiophile objective measurement sources. The XLR 4.77Vrms output is clean with dynamic range of 130dB and 0dBFS THD+N better than -123dB. In a similar way, the RCA 2.35Vrms unbalanced output gives us an excellent THD+N of -120dB. On my more complex Triple-Tone signal, I'm seeing a TD+N of -118dB through the XLR and -111dB through the RCA which are again excellent.

I tried to open the case to take pictures of the module, the PCB etc .. but unfortunately it is complicated to dismantle ... THD+N ................................................................................................0.0008% Weight ..........................................................................................3.3kg/7.28lbs This is my second amp based on this chip. I had already reviewed a fully symmetrical dual Mono MA12070 that I had built a few months ago.

Sabaj

Using the latest DSP chip with ST high-power amplifier chip, carefully designed and debugged, its distortion is as low as 0.0008%; THD+N ...................................................................................................0.004% Just received the new Sabaj A20. This a brand new class D amp made with a dual Infineon Merus MA12070 and fully balanced. bits resolution is really not much to ask of modern DACs these days and the graphs basically look like they're layered on top of each other with minuscule variations. Notice that the only mentionable difference is that DACs do have slight frequency response variations, but even this is less than 1dB difference up at 20kHz (and often this is a reflection of the filter selected). USB compatibility ..................................Windows 7 / 8 / 8.1 / 11(Needs Driver) Mac OSX、Linux(Driverless)