Comments on: C-MEDIA CM6206 5.1 USB Audio Sound Card Line-In & Line-Out Bass Extension Low Frequency Response Upgrade https://tehnoblog.org/c-media-cm6206-5-1-usb-audio-sound-card-line-in-line-out-bass-extension-low-frequency-response-upgrade/ phones ● computers ● audio ● video ● technology Thu, 21 Aug 2025 10:08:51 +0000 hourly 1 By: TehnoBlog https://tehnoblog.org/c-media-cm6206-5-1-usb-audio-sound-card-line-in-line-out-bass-extension-low-frequency-response-upgrade/#comment-1362 Thu, 21 Aug 2025 10:08:51 +0000 https://tehnoblog.org/?p=9818#comment-1362 In reply to Raj.

Not sure you will gain anything by replacing those output caps in that case tbh. Regarding U2 chip, the connections seems to go to pins 14-17 EEPROM interface signals.

]]> By: Raj https://tehnoblog.org/c-media-cm6206-5-1-usb-audio-sound-card-line-in-line-out-bass-extension-low-frequency-response-upgrade/#comment-1361 Thu, 21 Aug 2025 08:49:17 +0000 https://tehnoblog.org/?p=9818#comment-1361 In reply to TehnoBlog.

I will be connecting all the outputs to an external power amplifier (6 ch. AVR analog IN).. This is my attempt to bypass the AVR’s non repairable HDMI card (infamous for Cinema DSP TI chip failure).I will also solder a red LED (D1) Btw any ideas about the optional sop IC (U2) not soldered on the board ? Thanks

]]> By: TehnoBlog https://tehnoblog.org/c-media-cm6206-5-1-usb-audio-sound-card-line-in-line-out-bass-extension-low-frequency-response-upgrade/#comment-1360 Wed, 20 Aug 2025 07:59:29 +0000 https://tehnoblog.org/?p=9818#comment-1360 In reply to Anonymous.

No, output capacitors should not be lower than factory values (100 uF), but ideally they should be at least 1000 uF, as explained in second section of the article. I thought you are referring to the input capacitors where 4.7 uF should be fine.

If you don’t need low impedance headphones output, e.g. you are connecting the card directly to the line inputs of your amplifier (10 kOhm input impedance or higher), then 4.7 uF will be fine, but so will be with current capacitors.

]]> By: Anonymous https://tehnoblog.org/c-media-cm6206-5-1-usb-audio-sound-card-line-in-line-out-bass-extension-low-frequency-response-upgrade/#comment-1359 Wed, 20 Aug 2025 06:34:19 +0000 https://tehnoblog.org/?p=9818#comment-1359 Opps I missed it while scrolling
So I can replace all electro capacitors in reverse polarity with eight 4.7uF film , except mic as I don’t use it
Btw I checked 5.1 ch with Saving Private Ryan” , they work perfectly in VLC on Win10 . Also I played stereo flac files with multi ch. option + room effects enabled. It kinda worked ok.
On Rasperry Pi + OSMC OS. , only 2 ch setup works for flac stereo.
One more request, can you make a tutorial for headphone jack , volume control , dual mono mic mod please
Thanks

]]> By: TehnoBlog https://tehnoblog.org/c-media-cm6206-5-1-usb-audio-sound-card-line-in-line-out-bass-extension-low-frequency-response-upgrade/#comment-1358 Mon, 18 Aug 2025 19:03:24 +0000 https://tehnoblog.org/?p=9818#comment-1358 In reply to Raj.

Hi, as shown in the table at the end of the YouTube video, 4.7 uF will give you 1.7 Hz cut-off frequency (-3 dB), which in turn should give flat response from 20 Hz and above, so the answer is – yes.

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