Hmm... I'm wondering if you understand what the High Pass Filter is for, because you're comparing it to tone controls and talking about interference. The HPF along with the full range aux out is provided for more seamless sub integration with a 2.1 system. I don't think anyone is going to high pass their speakers if they aren't sending the lower range somewhere else. The HPF allows you to remove a couple lower octaves off your speaker's mid-drivers to clean up the midrange a tad, but also providing a TON more headroom in your amp's power (because it's driving the lower frequencies that takes power), and thus letting your very capable sub handle those lower octaves. Most subs only have a low pass filter. So combine this amp with a capable sub, set the HPF here and LPF on sub's plate amp to match, and you've got an effective crossover at around whatever frequency you want (which is probably going to be 80hz for most people with their bookshelves, which most people will probably be using this amp with.) Doul would have made that process a WHOLE lot easier here if they would have labeled marks on the knob to tell you where 80 hz, 90 hz, and so on are. DOH!
The high pass is what i like for amos and main speakers if they are small woofer types . It gives the amos a better time as well as keeping distortion and cone break up . Cheers 🥂
Johnaudiotech recently measured the distortion to be 15 times higher than what it should. I suspect the chip to be fake. Unfortunately you didn't disassembled to see the writing. The output capacitors, red Wima are intended for input level dc blocking, unsuitable for 1.3A 450khz peak pulses.
Hmm... I'm wondering if you understand what the High Pass Filter is for, because you're comparing it to tone controls and talking about interference. The HPF along with the full range aux out is provided for more seamless sub integration with a 2.1 system. I don't think anyone is going to high pass their speakers if they aren't sending the lower range somewhere else. The HPF allows you to remove a couple lower octaves off your speaker's mid-drivers to clean up the midrange a tad, but also providing a TON more headroom in your amp's power (because it's driving the lower frequencies that takes power), and thus letting your very capable sub handle those lower octaves. Most subs only have a low pass filter. So combine this amp with a capable sub, set the HPF here and LPF on sub's plate amp to match, and you've got an effective crossover at around whatever frequency you want (which is probably going to be 80hz for most people with their bookshelves, which most people will probably be using this amp with.) Doul would have made that process a WHOLE lot easier here if they would have labeled marks on the knob to tell you where 80 hz, 90 hz, and so on are. DOH!
AY up mate , i was just looking at the amo yesterday and wanting info from a proper lad . Cheers , from a american slag 😂
👍
The high pass is what i like for amos and main speakers if they are small woofer types . It gives the amos a better time as well as keeping distortion and cone break up . Cheers 🥂
👍
Have you had chance to take a look at the similar looking Douk audio Q11 DAC?
No, hopefully one for the future.
Johnaudiotech recently measured the distortion to be 15 times higher than what it should. I suspect the chip to be fake. Unfortunately you didn't disassembled to see the writing. The output capacitors, red Wima are intended for input level dc blocking, unsuitable for 1.3A 450khz peak pulses.
Thanks for the info
I am looking for subwoofer amp with crossover controls for my passive subwoofer
Fosi Audio do one. fosiaudioshop.com/diyaudio