Sanwu Manuals / Docs / Anything?

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Tom2112

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Joined 2016
#1
Hello DIYers!

I've been reading the forum a bit and this is my first post. It seems that you guys are way ahead of me and dig a lot deeper than I do. I'm just cobbling parts together to make things that interest me - like a bluetooth speaker or an MP3 player with bluetooth.

Anyway... I have picked up a couple of Sanwu brand boards, but in both cases, all I got with them was the board. No docs, no manuals, no nothing. For the prices for these things (both under $11), I'm not expecting much, but I was hoping to find some docs somewhere. Alas, my google-fu is not powerful enough.

Does anyone here know where I can find docs on Sanwu HF-36 (a bluetooth, USB, TFT MP3 player) or Sanwu SW-HF01 (a TDP7492P amp/bluetooth board)?

I saw a couple threads where people were working on the TDP7492P, but didn't see any docs.

Thanks in advance,
Tom
 
#2
Like this?

$_20.jpg


I've just ordered a few. Hoping there'll be no problem with installation.
 
#4
Hi Tom

I finally got my modules last week. I did a write-up, as I bought the extra for sale to fellow local audio DIYers. It might be of some help to you, I hope.

http://www.elipse.co.za/Docs/Instr_CSR8635_BT_w_pic.pdf

Also, a short review:

Here is my review:
I bought this amp to make a portable speaker tester, as I sometimes buy used loudspeakers. See YouTube vid here: https://www.youtube.com/watch?v=N3k9lWz48rw for a project by DIY Perks. A fellow avforums member also sold a similar project here.

I had no problems pairing to this BT amplifier with LG G4 phone. Interactive controls do work, though I don't intend using them that much. The PLAY, BACK and NEXT controls can lag somewhat. This is my first experience with a Bluetooth interface of this kind, say I can't say if this is an issue or just on par. Sound quality from the amplifier output was good. The ability to adjust the amplifier gain is a very handy feature which ensures compatibility with a variety of source levels.

Unfortunately, there is not much information on how the analogue connection is supposed to work. The sound from the analogue (headphone) jack was good in the upper frequencies, but lacked bass extension. I also tried it with an analogue source; compared to the Bluetooth source, the upper frequencies seems to be rolled-off somewhat.

When driven hard (the speakers I tested it with are around 85dB/1W) the whole board gets warm. If used in this way, I would recommend adding a heat sink to the amplifier chip, as the heat spreads to the capacitors. The PCB is designed to act like a heat sink, so I would also recommend installation in a well-ventilated enclosure.

I also recommend adding a speaker protection relay, as there is a bit of turn-on and turn-off thump. I personally don't think it will fry your speakers, but it can be unnerving.

I recommend it for Bluetooth playback.
Click to expand...
 
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