Great review on a wonderful little amp board. Thank you John

Thanks for your efforts, your review is very comprehensive.

Excellent review! And great recommendations with supply voltage

Wow, thankyou for your prefect video. You did a great job. It was a pleasure to watch.

Love the references of both AVE and EEV! Keep it up.

Those little amps are sold as an amp for DC and AC input voltage. That's also why that diode is there as well. Its a half wave rectifier. Although I always have used DC input to reduce noise. I have purchased amd used 4 or 5 of these. I am very impressed with these amps.

Awesome video. I just bought four of these amps. Glad to see it wasn't a waste of money. I paid $1.89 CAD each for them.

Nice review.. getting one soon thanks.

Thank you Very much for the Video.

Love watching your videos, especially the testing. I wish you could run some temp tests directly on the chip itself, using a 1khz waveform input. Thanks!

Hi John,,, thank you for doing your review,, I was wondering if it would be possible to add what Current draw for voltage these amplifiers use?

Great review once again!

Nice video John! When you say clean power - do you mean that you don’t see any spikes reaching to the 1% reference point that you show on your scope?

Focus you FAAAK! Recently sub'd, love your work

I am using if for a piezo pickup amp for my guitar and uke. Works great. And cheap. Wish it had a tone pot though. Anyway to add a tone pot?

John I'm playing with its bigger brother the TDA7375 I took out of a Blaupunkt car stereo here in Australia. Thanks for your review and sharing.

great review thanks

In a bridged amplifier like this one , is there any necessity to add output coupling capacitors at outputs to prevent DC from going to the speakers & damaging them ? Does DC really harms the speakers ?

I've got an idea for you. How about testing cheap caps vs high quality ones. Maybe show any difference in them in a working crossover circuit. I've heard arguments that there's no audible difference and some say they can hear differences even between the highest quality parts. It applies to both active and passive circuits. Just a thought. I respect your honest opinions. Hope you get more support from companies looking for an honest critique or just more exposure.

Hi John. Could I use this amp on the headphone jack on my Samsung tv. Doesnt have audio outputs.

Generic question here but im strongly considering using this board for a DIY "Sound Bar" for my TV as this TDA chip has the specs i'm looking for. Do you think a Mean Well LRS-50-15 will be able to have this IC reach full power into 8 Ohms? i know that supply is only 15V but it can be adjusted from 13.8V to 17. something volts. ill most likely set it to 16V OR Would i be better off going with the Parts Express PAM8610 board? both options seem to put out the same power into 8 Ohms at 14-16 volts Thanks in advance, love the vids! www.mouser.com/Search/ProductDetail.aspx?R=LRS-50-15virtualkey63430000virtualkey709-LRS50-15

Can i connect car high freqvency speaker paralel with a loud-mid speaker?

will this work with a turntable have a tube amp thats completely failed need something to replace to drive 1 six inch speaker and 2 small tweeters

Nice review

Can this be used by 9 volt external battery or 5.5 volt battery?

Can I disable the LED by snipping it off?

How can you tell if the Chip Amp Ic is fugazzi? (Counterfeit?) I bought the same module at Temu and wanted to know the difference.

Great video, I have that amp, great to buid something that sounds good

Thank's! What's the power bandwidth?

Hello, thx for the review, I bought 4 of them in china, 2 of them are working perfectly but 1 has no output at all and 1 is making pops and cracking noises when playing, did you ever had similar issues? Could it be that tda chip is defect?

Please answer me sir which is better amplifier pam8610 or tda7297 in detail ?

Power output u calculated is Per channel or it is total power combined on both channel ??

Hey John. Enjoy the video's. Is there any way to add any circuity to the LED to reduce the brightness? I have always wondered. I have several devices that have super bright LEDs that I wish were not so bright. Maybe you could do a video?

sir i having 10 inch pioneer subwoofer 2 speaker sujest me subwoofer board for two speaker..... i need only bass on speaker....

I have the 7377 and I really like the little amp. I guess this is its little brother.

So this amp should not stress that much if I'm running it on a 6 ohm load at 12V (2A)? Got this for 3$ and waiting for the package to arrive!

Pls john from your experience pls recommend me a amplifier i should buy for true rms ranging 30 to 50 watt rms per channel

great Channel .Jon congratulations for all of your [ help to us ] by your channel. Jon i am thinking about 1 month now for buying this Amp.TDA7297 stereo audio amplifier but my problem it is that i canot find the frequency responce range. of this board and the 90%of all Amplifiers. Can you tell me please Jon it is the regular 20HZ to 20KHZ ? ? ?. Or its diferent ? thankou for all. my best regards, from thessaloniki Greece.

Best source Without distors on max volume?

Sold out, I guess it's popular. Nice!

Great timing John, I purchased a couple of these in kit form just a few days ago (waiting on delivery). What I think I might do is omit the diode as it's not shown as required on the datasheet, think it's just there for reverse polarity protection.

Which kind of you are listening music .it's depend on bass or treeble

John I am enjoying your videos, thanks. Can you recommend a small stereo amp board that can manage 4 ohm speakers at 12 VDC? I have a bunch of them as well as some 16 ohm speakers. Any help would be appreciated.

You may be able to run it at 4V, but how hot does it get?

+JohnAudioTech What is the size of the DC input socket? 5.5x2.1 or 5.5x2.5? Thanks for the great video!

so the big question is: is it better than the pam8610? i made some speakers and they are 25w each. i tried them with the pam8610 but it sounds horrible. so should i get this one?

I've had this thing for several years and its got it quirks. It's being used 24/7 with my computer and powering a couple of cheap speakers. Computer on I hear a pop. Same when the computer switches off. It needed a new electolytic cap after a year. The old one began to buldge. It seems to have some grounding problem in relation to what the computer is doing. If you just disconnect the inpute it develops a loud buzz. Just a few weeks ago it developed a cracking sound on certain frequencies though one channel. It could be the speaker but its hard to tell.

Hello. I have bought this tda7297 board from amazon. I have hooked it up to two sony speakers rated at 25 w 6ohms. I use a power supply of 12 volt 3 amps to power it. I was wondering what would happen if i connected a preamp board board between this and the 3.5 mm output?

Very useful review- looking for a 9v amp for a bench amp to test pedal effects. Tried a pam8610, but found it noisy, and an lm386 (noisy cricket) but the power was underwhelming (was only able to get 0.3w clean). Price of this module is very cheap now, so worth trying it out- hopefully 2.7w clean output on 8r will work out. Would be useful to learn if and how this amp (module) could be bridged for more power!

I bought this amplifier for 4" full range speakers. Sound quality is great but it needs power supply ground separated from source, otherwise you will hear noise comming out of speakers.

@JohnAudioTech Made a monoblock of this PCB using only one speaker channel out. The specification says: 2A "Output Peak Current (internally limited)" Is that limit 2A for the total chip current draw. So when I use only one channel is that allowed to draw up to 2A or is it divided between the channels to 1A each? That is a interesting question how the limitation is implemented in the chip. If the limitation is on the whole chip or on each channel 2A/2?!

What about bridging the 2 audio outputs together? What kind of results would you get?

I TRY using at 4 ohm load at 16V the heatsink it get really hot

I'm going to buy a linear power supply soon is there anyway to set the supply to where it shows the current its drawing and to let it go up and down accordingly?

I'd love to see a test on a little board I just received... I have no idea what chip it's using; however doing a search of "20w Bluetooth 2.1 channel board" on eBay will show you what I have. It has two knobs on the front side and comes with jst pigtail connectors for battery, left channel, right channel, and subwoofer. I had a nice voombox Bluetooth speaker that the board died on me, and having tiny smd components I decided not to bother trying to fix. I harvested the speakers, passive radiators, and the subwoofer to reuse and I'm glad I did. $4.62 for the amp board. I can assemble a high capacity 1s li-ion pack for no out of pocket cost.. now I'm just looking into enclosure materials and design.

I have questions- 1. Can this chip be powered by a 12 Volt transformer which outputs around 20 volts @ no load ? 2. If this chip is used with higher wattage speakers like 40 watts (6 inches speakers) , will it lead to overheating of the chip ?

Can i connect 6ohm speaker

Heaps of these on aliexpress... and the prices vary wildly. A lot seem to omit the heat sink and given how large they are... guessing they're there for a reason. Hate the way most mount the audio input on the front near the volume knob as it limits how it can be used. I have a similar lm386 amp at the moment I use on an ESP32 and it works great... but eventually I want to get stereo output going.

Do you remember vaugely how much current this pulled from the power supply 16v 8ohm @ clean full output? Cheers

How do you get 8.4rms (i.e. 24Vpp) from 16v power supply?

Hello John, I subscrbed to your channel and like your reviews. John, I bought one of these TDA7293 amp boards that require a AC input and the ad mentions only 12-50Volts AC. I want to make it into a 100watt (peak) guitar extension speaker that will be slaved off the the headphone mini-jack from , my Fender Champion 40w SS amp that already uses a similar audio IC (TDA7294). The AC input (Hammond transformer with centretap ) available is either a 185E36 (36 volt secondary CT @2.2 amps) or 185E28 ; 28 volt secondary CT @2.8amps. Which one should I use not to exceed the DC rail voltage, and still get a good power level from this amp? From my calculations, 28volt secondary rectified by a full wave bridge is 28 AC x 1.41= 39.5 vdc peak no load. With a the TDA7293 load (2amps @80watts? peak), the power rails shouldn't drop down much below 25vdc. Not sure what the Chinese advertiser means about 12vac -> 50volt AC ..Does it mean I can only use a Max 50volt AC secondary? That could mean thatthe 50volt AC which would exceed the rating of the chip? max 50vac x 1.41 = 70.5vdc (+/- 35 vdc per rail). With a 8ohm load the avg dc would be around 50vac x 0.90 = 45vdc or about 22-23vdc per positive and negative power rail. Should I use a 28v ct or a 36v ct and still be safe witout power rail regulator (T0-220) to be on the safeside? I'm also putting in a speaker fuse (2A fast blow) to protect a expensive guitar speaker (Celestion V series $131) since this TDA is dc coupled directly to the speaker and COMMON.

Jonh I studied your video here and went to look at the full data sheet of TDA 7297 altho I just didn't understand all the points and FIGURES give. One thing I noted immediately was its output is actually more or less 5wpc rms at 16.5vdc, output measured at 8 ohms THD< 1%. I use two pairs of jbl 4320 speakers and they are very efficient, @96dB SPL 1 metre. And so I decided to order 2 of these amps, assembled. At taobao, these cost me peanuts, literally. Long story short, they are doing an incredible job here. And so I am wondering. The jbl 4320 was produced with an active amp'ed in its time for studio applications, and two way low level active cross-over boards pre-assembled kits are the way for me to go (yea coz the fun is huge, init?). So, maybe I'll give it a go.

who is better , this or pam8610 ?

Once again a great informative video with no woffle. My amp driving my PC speakers is over 10 years old and getting a bit of a hum. If I can't fix it this will do nicely. Ebay UK it's £1.93 ($2.52) free postage. I'm getting 2, how do they do it for $5.

how amp its need.for making a subwoofer with low pass filter.please tell.

ebay sellers claim 2x15W, your test equipment is out of whack they cant lie on ebay........ great vid i'm just looking at cheap boards to make some pc speakers a little better than its 2w things

Do you have the schematic of this amp?

I have 3 of these and I`m pretty happy with the little amps, I`m getting some hum when touching the volume knob at anything beyond 1/3rd volume though, but no biggie.. I run one of them in a DIY speaker with 2 samsung ht 2.5" 15W 8ohm speakers in a 2.5Liter box using a 11.1V LiPo, and have a balance charger inside the box, and a voltmeter up front with the volume knob. Next edition will be 1.5L and I`ll include a low voltage cutoff :) OR, I`ll use 2 of these and 4 drivers, as I have four of them lol, I also have two 20W tweeters, so I guess I could make a much bigger box too.. Time will tell :) Long rant, good little amps..

Sir, please review tpa 3118d2 Mono board

Which is the best chip,lm 1875 or tda7297

Bought two of these type of boards from HiLetGo. Neither have any output. Very frustrated right now

I'm not a tech-head, so what I'm asking may not be relevant to your other followers. I came across an old late 40s/early 50s radio that has a nice case. I want to put an F.M radio in it, but maintain the vintage look. Most of the inexpensive kits would be hard to adapt, since they're stereo. I don't want to bridge both outputs to one speaker. The cheesy kits are all I've seen in my price range. Would using the TDA 7293 amp be a realistic way of getting good sound out of this?

i think i have the album Embryonic Journey was on

My board has no audio output so far very sad :(

This is nice amplifier ,but this os very hots too....,power output is good ,i using adaptor 12v 3a

Which is better amplifier pam8610 or tda7297

You can play it if it's for educational purposes

power supply can be old laptop brick 18-19V IBM

what is the name of your cat??? i like your cat it is not in this video but the thumbnail of the last video makes me feel happy because of that cat!!

it would be nice if a MOSFET amplifier is made

wish they had RCA inputs

TONSIL GDWT??? 7:00

Sir which country you belong

How to bridge this chip amp

You should test it bridged in mono

15w

3245

Check out lpman and and vinyl obsession videos they claim its for educational purposes demonstrating the record player

Use Ncs Music!

Koto dam , kothay thake kinbo mo number dene

too much advertising on your channel my friend, it's a shame!!!

Beware if you buy this thing that there is no thermal compound between the chip and the heatsink!!

Ahhh someone else who watches AVE