Sabaj A20a 2022 Version Power Amplifier MA5332M Chip 350W Class D Bridge Tie Load Provide XLR & RCA Bluetooth 5.0/XLR/RCA Input, RMS 170W x 2(4Ω) 0.004% THD+N

Product Information

The amp is made in an aluminum case, it feels sturdy and beefy. The front of the amp has a mirror front and the volume controller has a dual function (volume and selector). When you press a few seconds on it , it powers ON / OFF. The amps also comes with a remote control. aptX-HD ..........................................................................24bit/48 kHz_576kbps 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. Subwoofer output level..............................................................................2Vrms THD+N ...................................................................................................0.004%

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. Anyway, no noise, no hiss, no distortion BUT I have not even gone close to turning it up anywhere near max (apartment). The color display screen and user-friendly operating system are easy to understand, equipped with full-function remote control function;

Balanced design

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). Standby power consumption.........................................................................<0.5W SABAJ A30a Power Amplifier 200W*2 Axign AX5689 XU208 DSD512 Bluetooth LDAC Apt-X HD AAC For Passive Speaker & Active Subwoofer USB transmission ....................................................................Asynchronization Since I'm basically "throwing the book" of measurements at this device, we can see that certain characteristics are the result of the ESS DAC chip itself. For example the "hump" (THD and IMD) between -45 to -25dBFS or so, and the sinusoidal pattern of odd harmonic distortions when examined in very close detail with 0.1dB steps using a low-noise notch filter.

I listened to the amp with my favorite Audiophile Playlist for 1 hour yesterday, it is really impressive @ first listening. Seems promising in relation to its ration performance / price. SBC ..............................................................................16bit/44.1 kHz_328kbps SNR ..........................................................................................................116dB

BTL mode

I'm running it right now on my "test bench" (aka in the garage) before I move it inside. I'm connected to some Snell K/IIs I keep down here for just such an occasion.

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. Channel separation .....................................................................................90dB

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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.