TDA7498E class D stereo amplifier board test and review

It's been a while since I reviewed any of these budget class D amplifier boards, so let's see what this one is all about.
Thank You!

[abunk]

John I want to say thank you for making this video and the amplifier pop on sounds video you made convinced me to get the TDA7498e. I found it normally around 10USD, but with some deal hunting and waiting I got it down to about 5USD making it my cheapest amplifier purchase to date.

Currently testing it with a 19V 45w laptop charger with great results and its way better than any of my other Class D amp boards.

It has some slight differences to the one you have. Biggest one is that it has a green PCB. Other differences include a different style screw terminal that's smaller, pin header gain control instead of switches, no included nylon standoffs, and reversed RCA inputs (Red on Left and White on Right).

The reversed color RCA inputs tripped me up, but its ok since just a simple cable swap fixes that.

Its pretty quiet with no audio playing, no pop sounds on power on, and best of all it doesn't have the auto mute after being silent for a while that a lot of TPA3116 boards have that can make the first second or two after playing something again to be only silence which I find particularly annoying especially for video.

Thanks again.

[indraptor]

Hey John this is John from India 😁yaay I get to put the first comment. Thanks for the video meant to use this with a pair of 60w 6 ohm speakers

[rsn]

Some of these new Class-D chips have Single-ended, Bridge-Tied-Load and Parallel-Bridge-Tied-Load configurations. The PBTL configurations can be a real pain to layout on PCB sometimes but my current favorite is a TPA3255 with an OPA1632 on the analog inputs to keep it from randomly hitting overcurrent protection at high power. The TPA chips with their protection circuits really love having perfectly balanced inputs for some reason and the OP1632 fully-differential op-amp works great for this.

[BBXFX]

Definitely would respect your professional opinion reviewing the TPA3255 used in some low-cost boards. Your suggestions over the last 5 years have led to great results so far.

[danielostlund]

Hi there John. I had also bought this amp some years ago and i have tested on 6ohm load diy 2way loudspeaker and i can say it sounded pretty good. Good bass response and overall good mid and high. But i guess it have some more detail in the highs in 8ohm.
I have tested the amp on around 30-32v dc on a linear powersupply. Also tested on a switched 360w 36v on 2x 4 ohm subwoofers with good punch resultts. Higly reccomended cheap amp dor dc psu or dual 12v battery in serie to 24v.
Thanks for the very informative and honest videos.

[voltagefreak]

Thanks John. Mouser has this as STEVAL-CCA044V1 listed at $76.25. What could the big difference be? The chip is only $6.39. There is another version rated @ 100w + 100w listed as a TDA7498TDR FOR $8.11.
Very sorry about Snickers passing. He was a very sweet cat. I too have lost many cats in the past and I still miss them all. We have 4 cats, 1 is hers 2 are ours and 1 is mine. All strays. God always keeps us plenty of companions around.

[robinbrowne]

Class D amps are interesting. Back in the 80's I used to work on ways to transmit audio using PWM and we used to listen to the Beegees, Beatles, Rolling Stones, etc as a test signal :-)

[steveswan]

Hi John this is a top class amp to me 👍the frequency response of my ears rolled off to 9khz a few years ago 😂

[timffoster]

I have NO idea what all you were saying. But at ~$20, I'm going to give it a shot.
Thanks for taking the time to make the review and tests.

[nikolatesla]

OK, my measurements on 4 Ohm load in parallel output - PBTL MONO mode (with jumpers J1 to J4 set to ON), clean output power like you measure it, just below fuzzies:

at 24V Ucc Pout = 60, 6W
at 27V Ucc Pout = 70, 2W
at 32V Ucc Pout = 101, 3W
at 36V Ucc Pout = 135, 2W

The distortion (checked with FFT of oscilloscope) is around 1%
I am very very impressed. I paid for it 14€.
(I need it for bass instrumental amp so roll of at HF doesn't bother me)

[davidkclayton]

Just a note that most speakers past 10 khz the impedance tends to go up

[joelcarson]

If I want hiss I'll listen to one of my cassette decks using a Type One tape without Dolby NR. A-B amps for the win.😎

[ranbymonkeys]

You make it back just from the pure joy that you get dealing with us alone, haha.

[dbanda_yt]

Thank you very much for the review it was very informative

[seanmcguire]

I pre-ordered the Wuzhi/Sinilink 7498 amp last year, put it on 24v6A supply and it is still too loud in the Arizona heat! I Recommend most of the black boards, no matter the brand.

[gamerpaddy]

i once built a amp and used one of these modules, i hooked it up to my rectifier / cap bank and upon turning it on it blew the chip and traces around it. it did work before that.

[mrb.]

It's a rough old waveform into 4 ohms .... I think I'd prefer to listen to your JAT501 amp, John !

[williamphillips]

I'm finding all these "higher wattage" TDA amps to be fairly noisy. The quietest ones I've found are the little blue "60watt" mono TDA3118 board.

[saanjayray]

For $20 in India you can easily get class AB that can deliver 100 watt per channel @0.1 distortion .

[gamerpaddy]

did you saw the topping pa5? its a tpa3255 based amp that blew every other one away, even ones that were like many many times more expensive in terms of distortion and noise . its not ebay china board priced tho.