2.1Amp and passive sub sounds bad :-(

DIY Products&Projects
1

I 3D printed Hexibase’s subwoofer enclosure and put in the same Tang Band WS-1876S driver he used. This sounds great on a Dayton Audio KABD amp, but not so great when I plug it into the Sub jacks on the 2.1Amp.

Is the 2.1Amp supposed to use an active subwoofer? Oddly enough, the sub sounds much better when I plug it into the Left Speaker jacks on the 2.1Amp.

I’ve played around with ACPWorkbench and tried to lift up the low end… it only sounds worse.

SB

2

Sorry to hear that. The Up2Stream 2.1 amp is not supposed to use an active subwoofer. It is supposed to deliver up to 100W (under optimal conditions) to a passive subwoofer. The subwoofer channel works great in my boombox. I used a Tang Band W5-1138SMF plus passive radiator.

3

Thanks for confirming. I’m sure it’s something I’m doing wrong. I’m brand new to building my own speakers and amps.

SB

4

One point for your reference, the subwoofer channel has a hardware low pass filter with cutting frequency 300Hz.

5

I think 300Hz is too high for sub bass frekvencies, maybe 100Hz could be better…