Class D = Trash?


So, I'm on my second class D amp. The first one, a Teac AI-301DA which claimed to use an ICE module, was unlistenable trash. I burned it in for a few weeks, it just couldn't perform, so I sent it back. Following that, I tried the new Emotiva A-300 (class A/B). It was significantly better, but lacking in too many ways for my tastes. So I changed gears, got an 845 SET from China -- and it was an immediate and massive improvement.

So, before I went further down the SET road, I wanted to try a better class D product using a modern class D module. I settled on the D-Sonic M3-800S with the Pascal module and custom input stage. I read from reviews that these things like to have big cables, so I picked up an eBay 8 gauge power cable (Maze Audio, el-cheapo Oyaide copy plugs, braided 4-wire cable) to go along with it.

Mid-range GONE.
Soundstage depth CRUSHED.
Euphonics DISAPPEARED.

Yes, resolution went up. Driver control went up, allowing me to play compressed rock/pop and orchestra with the speakers being able to render it all. But enjoyment in the sound is basically gone. Using my best power cable (LessLoss Original) improved performance, but didn't fundamentally change the amp's nature. I ran back to my headphones (Focal Utopias) to detox my ear canals.

So, how long does a class D need to burn-in? I want to give it a fair shake before writing the technology off forever. 
madavid0

Showing 3 responses by phd

The best Class D I have heard does use an analog power supply (a large Toroidal trans with banks of power supply caps). In addition, if bass is of the utmost importance then an oversize analog power supply is a must. Don't get me wrong there are some very nice sounding Class D amps with a switching power supply but they seem to excel in the Mids and highs but lack bass to some degree or another.
I don't think there is a specified time for Class D to break-in. If there is and it would vary from one manufacturer to another should be mentioned in the manual. What we do know is that the longer they are powered up, the better they sound. The most important thing to keep in mind as they do require a lot of experimentation with different interconnects and power cables to sound their best and patience will prevail.
Toddverrone, ah yes you could be right but somehow wyred4sound has managed to engineer the bass out of their amps. What I can say with confidence is that an analog power supply in class D does give you that full sound that class a/b amps posses.