dipswitch settings, speakers connections/phase
Hello Irribeo, sorry for the very delayed reply
Here are the dipswitch settings on my Weiner
SW1 1=1; 2=1; 3=0; 4=0
SW2 1=0; 6=0 all the rest of the switches in between are set to 1
My speakers are Tannoy Mercury V1i bookshelves on stands. I am pretty sure they are not out of phase.
1.2MHz 1SPW 26dB with speakers that form slightly overdamped filter with 15uH/0.47uF, so outputfilter ringing precaution for 1SPW operation seems taken care off imo. Selecting energy savings modulation with 1200kHz max switching speed seems a little irrational, but probably makes it sound warmer.
Bass reduction mmmmm
Bass reduction mmmmm
Checked screw's all connections ? A Wiener has significantly more bass output here than a standard Sanwu. The opposite result is strange, has it been powered for 2 years continiously ? Also powered on when not listening I mean ? External powersupply was new and branded product ?
Try this board, you wont have to do any mods.
m.ebay.com/itm/XH-M189-TPA3116D2-2x50W-Digital-Power-Amplifier-Board-Class-Stereo-Audio-TE743-/262975067368?hash=item3d3a8914e8:g:qUUAAOSwlndZETDw&_trkparms=pageci%3Ab6d315ff-6aa3-11e7-bc51-74dbd1803c05%7Cparentrq%3A4eaf64a315d0aa1182997857fffb7b79%7Ciid%3A3
Sent from my ASUS_Z00AD using Tapatalk
This board looks like a clone of one of mine. But mine has a number of markings and label on the bottom side of the PCB. The one I have sounded pretty good without adding anything. For someone who wants to check out these inexpensive amps, not a bad choice.
Regards,
Hi,I would like to ask for help with some amplifier issues that i'm experiencing. So I 've bought two of tpa3118 mono boards dirt cheap and I'm getting some annoying white noise /hiss issues . As showed in previous posts I removed 100k resistor in order to lower the gain thus reduce the hiss, but such reduction did't occur in significant maner, the hiss is still loud.
Here are pics of testing set up ,I'm using 16,8v (18650 with bms) battery pack.
Connecting signal source doesn't bring any improvement on hisss situation, just saying though.
Here are pics of testing set up ,I'm using 16,8v (18650 with bms) battery pack.
Connecting signal source doesn't bring any improvement on hisss situation, just saying though.
Attachments
Well, the daisy-chaining of power is (at least) A problem, if not the root-cause of your issues.
You want power wires running to your two amps, from the same "starting points".
In addition to that, syncing up the two amps might not hurt either... That plus the stock gain setting that, from what i've read here, is maxed out on these blue boards.
You want power wires running to your two amps, from the same "starting points".
In addition to that, syncing up the two amps might not hurt either... That plus the stock gain setting that, from what i've read here, is maxed out on these blue boards.
Thanks for the help , shorting out input did the trick .
One more question is there a way to get rid of power surge "pop" on start up ?
I'm running those borards in this box , I'd say that they sound decent enough for the price .
You fixed the noise issue your setup had ?
Shorting the + input only shows what is ampboards own noise contribution with both +/- inputs grounded. It may help eliminating potential causes for the noise, but fixes nothing.
One more question is there a way to get rid of power surge "pop" on start up ?
Install a switch on the mute pins and use that to switch your amp on
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