My guess is full range on the stereo channels. With a sub, usually only a low pass is implemented, perhaps they expect folks to use satellites with built in caps for high pass filter?
My Chinese friend also says that the white connector on the bottom left of the Feixiang 2.1 board is for a Mute switch
Maybe first check the circuit and draw it on paper ? It could be an error with the extra circuit or for instance caps that are underrated...
Same thing over here with the YJ blue board. Caps are aligned so that the text is readable. YJ took effort to make the blue version a better version. Most parts are better quality compared to the red board. I guess aligning all caps so the user can read the text is part of that 😉 I was planning to change the cap orientation too. I think I will use MKP/MKC caps instead. Case is ready, PSU is ready but no time this week to finish it.
The problems with cold joints are standard nowadays. I see it in various devices. Recently I had it with a transformer. The insulated connection wires were poorly soldered to the winding wires. It helps being slightly technical and it is advisable to check all electronic stuff you buy for soldering errors. Even branded stuff has the same problems but their QC filters a lot out.
I hope lead-free solder will be further improved but till then....
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Anti-thump & Lead free solder?
There is no doubt that lead free solder is more problematic than solder containing lead because of its properties. You can not expect the best quality when you pay such low prices for assemblies. Just the reality of the situation. As said many times before, you get what you pay for!! to expect anything else is well, unlikely.
I do wonder why they have chosen a lead free solder process when they have not attempted to obtain any regulatory authority for selling any of their devices in the first place. In other words, know one is imposing ROHS requirements upon them that I see. It is not like the US has any ROHS import requirements yet, it is basically a EU directive, so far. I guess if they are using a smt line that was setup for lead free then it is too much of a change to go back to a lead solder process.
Turn on thump. I am surprised that some of you are experiencing this. I have not experienced this in my TPA3100 design.
Have to ask where is it coming from?, the TPA3116/18 device or other parts of the design.
In my TPA3100 design, I have not done anything special. I pulled up both SD & MUTE and in my BASCOM code, using a xmega device, I did this
I would be interested to find out which designs are thumping and why it is so that I do not fall into the same trap.
P.S. Good luck in the hockey game today!!
Cheers
Rick
There is no doubt that lead free solder is more problematic than solder containing lead because of its properties. You can not expect the best quality when you pay such low prices for assemblies. Just the reality of the situation. As said many times before, you get what you pay for!! to expect anything else is well, unlikely.
I do wonder why they have chosen a lead free solder process when they have not attempted to obtain any regulatory authority for selling any of their devices in the first place. In other words, know one is imposing ROHS requirements upon them that I see. It is not like the US has any ROHS import requirements yet, it is basically a EU directive, so far. I guess if they are using a smt line that was setup for lead free then it is too much of a change to go back to a lead solder process.
Turn on thump. I am surprised that some of you are experiencing this. I have not experienced this in my TPA3100 design.
Have to ask where is it coming from?, the TPA3116/18 device or other parts of the design.
In my TPA3100 design, I have not done anything special. I pulled up both SD & MUTE and in my BASCOM code, using a xmega device, I did this
Code:
Config Portd.2 = Output
Tpa3100_sdx Alias Portd.2
Set Tpa3100_sdx
Config Portd.3 = Output
Tpa3100_mute Alias Portd.3
Set Tpa3100_mute
Config Portd.4 = Output
Tpa3100_gain0 Alias Portd.4
Reset Tpa3100_gain0
Config Portd.5 = Output
Tpa3100_gain1 Alias Portd.5
Reset Tpa3100_gain1
Config Portd.6 = Input
Tpa3100_fault Alias Pind.6
Portd_pin6ctrl = &B00_011_001 'Enable Pullup and reaction on rising edge at PIND.6
'^ ^
'^ Reaction on rising edge
'^
'Enable Pullup
Portd_int0mask = &B0100_0000 'include PIN6 in INT0 Mask
Portd_intctrl = &B0000_00_01 'Low level interrupt
'^
'Low Level INT0 Interrupt
On Portd_int0 Tpa3100_fault_isr
Enable Portd_int0 , Lo 'Enable this Interrupt as Lo Level InterruptI would be interested to find out which designs are thumping and why it is so that I do not fall into the same trap.
P.S. Good luck in the hockey game today!!
Cheers
Rick
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I do not have problems with turn on thumps. When I powe the amp off, I hear a faint tick through the left channel speaker, but it's nothing to be concerned about.
I have an YJ board that does the same for the left channel and the excursion goes 10mm+ . I have not tried to find the cause as I don't use the YJ boards but if you have a high displacement then you should worry about your tweeters and maybe your woofers.
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10mm! Wow. My YJ red boards also thump in the left channel, but nothing like that. I make a practice of turning the volume down before power up and power down.
The new blue board has a very small thump. I'd thought it silent earlier, but I had it running through my Adcom preamp, and it was dead silent. On its own, with a dedicated pot, the new board does seem to have much less of a thump than the old.
Very odd.
The new blue board has a very small thump. I'd thought it silent earlier, but I had it running through my Adcom preamp, and it was dead silent. On its own, with a dedicated pot, the new board does seem to have much less of a thump than the old.
Very odd.
As I said in some other post, compared to the 2.1 from YJ, but used as a 2.0 with a 4ohms resistor in the sub out, I like a lot more the little blue one, tested with the same psu and same speakers.
Wich by the way, I believe that this little board its made by feixang as well, as it uses the same components.
Good to know... cause I did not have the chance to go to my little "Dexter Lab" to try it out... its been a busy week!!... Sorry!!!
So seller Alieexpress Beauty really (ER BAO) could be cancelling these orders for ChengZhi boards for another reason.... meantime it looks like FULL REFUND on Alieexpress, means they deduct a $15 fee LOLOL for seller cancelling and not delivering upon salesagreement the buyer is charged $15 ??? Well if this is true this will be last time I buy anything there ...
Which board are you referring to when you say "Little Blue One"? The "Danzz" YJ 2.0 Blue Board? Or the Feixiang 2.1?
Yes, indeed it is. I couldn't search for it, but the direct link seems to be working: TPA3116D2Êý×Ö¹¦·Å°å 50w+50w ³¬TA2024 TA2020 TA2021-ÌÔ±¦Íø
I do think the sound will be great, it's one of the best rated board by Saturnus. But what I fear is the mentioned short circuit problems.
Breeze amp
A little while ago, I put a post up after receiving my Breeze amp. The soldering was extremely shoddy, power switch wasn't working, the amp was running very hot, even with volume turned right down etc. etc. .
By way of update:
I contacted the vendor who finally responded after considerable delay and then tried to convince me that this was perfectly "normal".
Opened up a dispute with AliExpress and the vendor did not respond within the required 4 day period so AliExpress emailed me and said that I'd be getting a refund.
Just thought I'd let people know if anybody was considering buying this amp. Like with a lot of this stuff from China its 'buyer beware'.
A little while ago, I put a post up after receiving my Breeze amp. The soldering was extremely shoddy, power switch wasn't working, the amp was running very hot, even with volume turned right down etc. etc. .
By way of update:
I contacted the vendor who finally responded after considerable delay and then tried to convince me that this was perfectly "normal".
Opened up a dispute with AliExpress and the vendor did not respond within the required 4 day period so AliExpress emailed me and said that I'd be getting a refund.
Just thought I'd let people know if anybody was considering buying this amp. Like with a lot of this stuff from China its 'buyer beware'.
I purchased from aliexpress ONCE and I will never do that again. Seller shipped my order 36 days after the payment and even after that my order wasn't delivered. It was needed 180+ days and alot of stress to receive a refund.
Thanks for the heads up. I was just looking at some other stuff made by Breeze - or at least has their logo on the front. Never had an issue with AliExpress either, but let us know how the refund process goes. As I stated in another post (not sure if was in this thread or nor), I try and stick with a couple select eBay sellers that I know are very legit and most of the time offer what I want or need. Plus I've had very good business relationship with them - even taking special request for items not shown on their seller's site.
For instance when I started building amps after a 3 decades break🙂)) a few years ago, I want to get a good supply and variety of those little brass standoffs. I asked my eBay supplier and sure enough he quoted me a price for large quantities in variety of sizes - and at a fair price.
I finally worked my way through this whole thread, and while I did a fair amount of skimming, I didn't see anyone who actually created a pair of monoblocks or a "dual mono" amp...
I was thinking about getting two of the "AudioBah" green PBTL boards from ebay and creating a dual mono amp.
Question: would it be possible to run two of these boards off a single power supply, such as the Connex SMPS300RE?
Any thoughts on how such a dual mono TPA3116 might compare to my IRS2090-based SDS-470 from Class D Audio? I'm quite happy with the SDS-470, except that it runs a little hot (but it is capable of 600 WPC at 4 ohms). The TPA3116 would obviously be a step-down in total power, but if I can get the same or better sound quality in a physically smaller footprint, and use less electricity, I'd call it a win!
I have built a little TPA3110 based amp from the $10 Sure board. I use it for my desktop system, and it sounds great... ridiculously good considering the $10 price!
I was thinking about getting two of the "AudioBah" green PBTL boards from ebay and creating a dual mono amp.
Question: would it be possible to run two of these boards off a single power supply, such as the Connex SMPS300RE?
Any thoughts on how such a dual mono TPA3116 might compare to my IRS2090-based SDS-470 from Class D Audio? I'm quite happy with the SDS-470, except that it runs a little hot (but it is capable of 600 WPC at 4 ohms). The TPA3116 would obviously be a step-down in total power, but if I can get the same or better sound quality in a physically smaller footprint, and use less electricity, I'd call it a win!
I have built a little TPA3110 based amp from the $10 Sure board. I use it for my desktop system, and it sounds great... ridiculously good considering the $10 price!
Hi there.
I am also on the Audiobah green boards. I plan on doing a 6 or 8 channel amplifier using these, not sure about the PS config I will have.
Yes, you can have two boards sharing a single power supply but you need to set one board to SLAVE and then connect SYNC pin in between boards to set the clock for the slave board. TPA3116 Datasheet - Page 15
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Why does the clock need to be sync'd to share a power supply? I know TI shows in their datasheet a master/slave for a 2.1 config.