XY-S350H is where it's at you can hardly find a cleaner more dynamic audio IC then it's TDA3521 it's the best sounding class D I've come across and so long as you have a good lithium battery to feed it you will get over 220 RMS per channel and a bit over 350 RMS on the sub channel I think I got 255 per channel full range using a 10ah 38v lithium battery made from A123B cells rated for extremely high amperage (120a per cell and a total of 48 cells lol) it's crazy that you can get about 800 water RMS out of an amp the size of your wallet and cellphone combined lol
Hi have 2 360w rms(6ohm) woofer and 2 260w sub(8ohm)in parallel and 2 180w satellite speakers (12ohm) I want to use 1woofer and 1satalite speaker in perallal in pairs
Link to Wuzhi Audio App play.google.com/store/apps/details?id=com.jieli.case_jingbode_first Hello guys i have a little update. I found how to adjust the input signal of the amp from 30db to lower. It seems from factory its sent maxed out, so you can barely turn the volume up. Somehow with this app you can adjust the master volume and fix this issue and get more volume out of the amp. When i first had it, i could barely turn the volume up past a quarter way. Now after adjusting the master volume from the app to around 3/4 instead of full, i am able to turn it up halfway and still have plenty of volume left before distorting..etc. i plan to do a little more listening and messing around with the amp/app and then i will do an update video and show how the app works..etc
I purchased ZK-AS21P two times because the first ZK-AS21P I received has no audio output in the LIFT CHANNEL but the right channel has a good audio output. Unfortunately after I received my second purchase the issue remains the same.
Thanks forr all the detailed information. A fool question before buy one this. The sufwoofer feature means that i can connect an Passive subwoofer, or only work with an Active subwoofer? Thanks
I tried mine on a 38v 11a supply and also a 40v 18ah lithium bank and CANNOT get much bass output unless I use the app. The stereo channels sound great but the bass output just lacks unless I use the app and adjust the eq in it. This is why I often suggest the HT21 over any other amp because there is plenty of output
I have a zk ht21... hhhmm this amplifier sound bass are good and bass treble.. I like this set up my sub woofer... 12v supply to 15volts power supply.. I use dc boost converter..
Lmao yeah i was surprised too but i dunno if i like it as much as the HT21. This one has plenty of power but it seems like the stereo channels are crossed extremely low, like 50hz and have a 3db slope or something. They seem to get just as much bass as the sub channel does lol. My little 6.5 Wharfedale bookshelf speakers are hating life right now lmao. Tomorrow i am buying some used Sony SS-MF550H floor standing speakers that can soak up the power and is a 3way setup so the 8" driver in it will be able to handle the low end thats getting through and the other drivers are crossed over accordingly, so should sound much better and be really fucking loud lol
Do you use old version ZK HT21 without App? I bought the ZK HT21 updated with App and I didn't like its subwoofer frequency cut, it cuts very little mid-bass, in the ZK TB21 model the frequency cut in the subwoofer is excellent... can you tell me if the frequency cut of the Does the subwoofer on the ZK HT21 model without an App work the same as on the ZK TB21 model? you can even look in the advertisements that the components near the subwoofer frequency potentiometer is different in the ZK HT21 model without App and model with app.
I don't use the app on any of these amps, it's kind of useless in my opinion. I just adjust the knobs until I find a happy medium. And do you mean you're using the ht22? The ht21 and as21 have vocal bleed, seems like it's crossed around 200hz or so, and then they just add the crossover potentiometer atop that
I own ZK-HT21 but it is broken after 15 Minute Party. I coul not find any Fuse on the Board. There is only the big Diode (tested OK) and 3 Voltage-Regulators 78M05 that is maybe broken. At the moment there is not even the Power light. How can I bring it back to Life?
Take the fan off by pushing in the push tabs and see if the chip(s) are burnt. Really though, these amps are so cheaply made that they aren't really worth spending the money on to repair, unless ofcourse you want to. You'd need to be able to test each component on the board to see what is good and what isnt. You can do a bit with just a multi meter. Get on www.bcae1.com and check out the amp repair section.
I use a HongPoe 36v 11a power supply. It has an adjustment potentiometer on the side you can adjust from around 24v to 38v. I have a small video on it titled "how to choose power supply for mini amps" or something like that, it will explain how to wire it up and so on. www.ebay.com/itm/293570750488?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=st2sdz4-q-e&sssrc=2349624&ssuid=CxCvqTMMQZ2&var=&widget_ver=artemis&media=COPY
@@scarr3ll can I use a 36v 20A power supply with 720w watts, right zk-as21 790watt power, if I use a 36v 11a power supply with 400w watts, it's not optimal for zk-as21
@@scarr3ll but the description on the amp is that the adapter power supply is 12v - 38v 10A, is it okay if I use 20A, I'm afraid the amp will overpower and overheat
@@luckyalfa1651 no you will be totally fine. The voltage is the main thing, just Do not exceed the 38v it is rated for. The amperage can be as high as you want. The amp will only use as much amperage as it is pulling. So if at full volume the amp pulls 8amps, you still have 12amp or so left out of the 20. Hope that helps and makes sense.
@@hottamtam this ZK HT22 claims to have TWS. These use the TDA7498 chips and sound great. www.ebay.com/itm/234966417493?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=x9yml-5zqpc&sssrc=4429486&ssuid=CxCvqTMMQZ2&var=&widget_ver=artemis&media=COPY
Hi, did you have a chance to test out this amp board cant wait for the actual review, there's another similar board XY-S350H it's about 95% identical with minor difference, upon reading the review of XY-S350H on banggood there are many complain about no bass, and i watched an review that shows the power draw was limited ruclips.net/video/I0w3vJIRnQM/видео.html (its in Thai I google translated the text into English) , i wonder if ZK-AS21 will preform better than xy-350h
Hello. This AS21 has plenty of subwoofer bass and stereo bass. I have been using the amp for the last few days and im not sure if i like it yet or not... the stereo channels have an immense about of low end coming through, like there is no crossover at all or anything, so its like the speakers get just as much bass as the subwoofer does! I CANT turn thr volume up more than a quarter of the way or the stereo channels are just too loud and over powered. With only bass and treble controls, its really difficult to find a volume that isnt over bearing or not loud enough. An external EQ is something to consider to help control the tone of the amp. Since i have not been able to actually test the power output, im starting to wonder if the amp just has a boosted signal or if actually puts out the power it claims. I think the HT21 may be a more solid buy but to clarify, i havent had any real trouble out of this AS21, it has plenty of bass for the subwoofer and stereo channels lol. Hope this helps, please ask any more questions if you need to
@@scarr3ll imgaz.staticbg.com/images/oaupload/banggood/images/D1/2E/147d8433-c725-4d7a-adca-1b4704c6b7db.jpg.webp maybe you can ask your seller about this
Speaking of how i mentioned it seems like the signal is boosted. I remember in my video reading you can change it from 30db or whatever. Id assume its already at 30db when sent to the buyer. But as i also mentioned, i didnt see any where on the board to attenuate the signal. When pairing it asked me to pair to an app, but i obviously didnt have it downloaded so it didn't work, and theres no mention of which app in the play store it is lol. But im not sure how you could Actually attenuate the signal with an app.... hell you could just turn your phone volume down instead.. just thought id mention all this aswell Edit: found the app. As i suspected, master volume is 100%. I adjusted it to half, now just to see if the volume changes in aux mode, or if you can only adjust it during bluetooth. If only during bluetooth, i would definitely suggest the HT21 over this, if you can adjust everything and the settings stay in all modes, this amp may be a good buy after all. Ill do an updated review soon after playing around with it more now that i have the app and such play.google.com/store/apps/details?id=com.jieli.case_jingbode_first
I just want a subwoofer amplifier module to run my jaycar response cw2198 10 inch subwoofer rated at 225 watts RMS? Otherwise I would love to see a review of jaycar Bridge module for amplifier? Cheers from Australia 🙂. Subbed and liked 👍
We don't have Jaycar in the USA, I'm not sure what you mean by Bridge module? And thank you for the subscription! I plan to put new videos out soon. If you'd like to see something specific from my previous videos, please let me know.
XY-S350H is where it's at
you can hardly find a cleaner more dynamic audio IC then it's TDA3521 it's the best sounding class D I've come across and so long as you have a good lithium battery to feed it you will get over 220 RMS per channel and a bit over 350 RMS on the sub channel I think I got 255 per channel full range using a 10ah 38v lithium battery made from A123B cells rated for extremely high amperage (120a per cell and a total of 48 cells lol) it's crazy that you can get about 800 water RMS out of an amp the size of your wallet and cellphone combined lol
I am confused which one should i get as-21 or xy-s350h
Hi have 2 360w rms(6ohm) woofer and 2 260w sub(8ohm)in parallel and 2 180w satellite speakers (12ohm)
I want to use 1woofer and 1satalite speaker in perallal in pairs
Link to Wuzhi Audio App
play.google.com/store/apps/details?id=com.jieli.case_jingbode_first
Hello guys i have a little update. I found how to adjust the input signal of the amp from 30db to lower. It seems from factory its sent maxed out, so you can barely turn the volume up. Somehow with this app you can adjust the master volume and fix this issue and get more volume out of the amp. When i first had it, i could barely turn the volume up past a quarter way. Now after adjusting the master volume from the app to around 3/4 instead of full, i am able to turn it up halfway and still have plenty of volume left before distorting..etc. i plan to do a little more listening and messing around with the amp/app and then i will do an update video and show how the app works..etc
Eagerly awaiting that review as well. Preferably mention how it compares to the zk-ht21. I'm currently torn between those 2 options. Much appreciated
I purchased ZK-AS21P two times because the first ZK-AS21P I received has no audio output in the LIFT CHANNEL but the right channel has a good audio output. Unfortunately after I received my second purchase the issue remains the same.
Говоришь много, усилитель хороший?
Thanks forr all the detailed information. A fool question before buy one this. The sufwoofer feature means that i can connect an Passive subwoofer, or only work with an Active subwoofer? Thanks
Passive only
It really comes to life when you hook it up to a 38v 10ah lithium battery lol it's night and day difference
I tried mine on a 38v 11a supply and also a 40v 18ah lithium bank and CANNOT get much bass output unless I use the app. The stereo channels sound great but the bass output just lacks unless I use the app and adjust the eq in it.
This is why I often suggest the HT21 over any other amp because there is plenty of output
One question, the zk-as21 220, how many hours can music be playing??? please help
What do you mean
I have a zk ht21... hhhmm this amplifier sound bass are good and bass treble.. I like this set up my sub woofer... 12v supply to 15volts power supply.. I use dc boost converter..
I love the HT21. I've bought 3 of them so far for a back up and other project. They sound great. Way better than the AS21
yes mt21 my back up amplifier.. but zk ht21 is the best....
THEY MADE AN EVEN BIGGER ONE???? 790w HOLY S*IT i have to get i only owned the baby one zk-mt21 and i blew it up by accident 🤣 was a good amp tho
Lmao yeah i was surprised too but i dunno if i like it as much as the HT21. This one has plenty of power but it seems like the stereo channels are crossed extremely low, like 50hz and have a 3db slope or something. They seem to get just as much bass as the sub channel does lol. My little 6.5 Wharfedale bookshelf speakers are hating life right now lmao. Tomorrow i am buying some used Sony SS-MF550H floor standing speakers that can soak up the power and is a 3way setup so the 8" driver in it will be able to handle the low end thats getting through and the other drivers are crossed over accordingly, so should sound much better and be really fucking loud lol
@@scarr3ll lmao as a person who loves bass that won't bother me a single bit tho lol
Do you use old version ZK HT21 without App? I bought the ZK HT21 updated with App and I didn't like its subwoofer frequency cut, it cuts very little mid-bass, in the ZK TB21 model the frequency cut in the subwoofer is excellent... can you tell me if the frequency cut of the Does the subwoofer on the ZK HT21 model without an App work the same as on the ZK TB21 model? you can even look in the advertisements that the components near the subwoofer frequency potentiometer is different in the ZK HT21 model without App and model with app.
I don't use the app on any of these amps, it's kind of useless in my opinion. I just adjust the knobs until I find a happy medium.
And do you mean you're using the ht22? The ht21 and as21 have vocal bleed, seems like it's crossed around 200hz or so, and then they just add the crossover potentiometer atop that
I own ZK-HT21 but it is broken after 15 Minute Party. I coul not find any Fuse on the Board. There is only the big Diode (tested OK) and 3 Voltage-Regulators 78M05 that is maybe broken. At the moment there is not even the Power light. How can I bring it back to Life?
Take the fan off by pushing in the push tabs and see if the chip(s) are burnt. Really though, these amps are so cheaply made that they aren't really worth spending the money on to repair, unless ofcourse you want to. You'd need to be able to test each component on the board to see what is good and what isnt. You can do a bit with just a multi meter. Get on www.bcae1.com and check out the amp repair section.
Saludos se pueden emparejar vía Bluetooth dos amp ZK-AS21?
I don't think the AS21 supports TWS mode. Try the HT22 or updated HT21, they use the tda7498 chips and sound great, plenty of power.
how do you connect zk ht21 to digital echo or tone control...please tell me (video link)
I'm not sure what you mean. I'm sorry
Добрый день, какой из этих усилителей рекомендуете ?
Newer models that are out, like the ZK-AS21P or ZK-APTX2 that I would choose. Either is a good choice
I just bought something like this, but I'm confused about the power supply, can you recommend a power supply for Wuzhi zk-as21
I use a HongPoe 36v 11a power supply. It has an adjustment potentiometer on the side you can adjust from around 24v to 38v. I have a small video on it titled "how to choose power supply for mini amps" or something like that, it will explain how to wire it up and so on.
www.ebay.com/itm/293570750488?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=st2sdz4-q-e&sssrc=2349624&ssuid=CxCvqTMMQZ2&var=&widget_ver=artemis&media=COPY
@@scarr3ll can I use a 36v 20A power supply with 720w watts, right zk-as21 790watt power, if I use a 36v 11a power supply with 400w watts, it's not optimal for zk-as21
@@luckyalfa1651 yes that is fine to use. The amp will only use as much amperage as it draws so 20a should be more than enough
@@scarr3ll but the description on the amp is that the adapter power supply is 12v - 38v 10A, is it okay if I use 20A, I'm afraid the amp will overpower and overheat
@@luckyalfa1651 no you will be totally fine. The voltage is the main thing, just Do not exceed the 38v it is rated for. The amperage can be as high as you want. The amp will only use as much amperage as it is pulling. So if at full volume the amp pulls 8amps, you still have 12amp or so left out of the 20. Hope that helps and makes sense.
grand phater
Do these have the tws mode to pair 2 of these together??
I believe there are some UPDATED HT21 models with TWS
Because Amazon only shows the 50x2+100 as the highest watt value with tws, but I'd luv to find the 220x2+300 big daddy with tws.
@@hottamtam this ZK HT22 claims to have TWS. These use the TDA7498 chips and sound great.
www.ebay.com/itm/234966417493?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=x9yml-5zqpc&sssrc=4429486&ssuid=CxCvqTMMQZ2&var=&widget_ver=artemis&media=COPY
Hi, did you have a chance to test out this amp board cant wait for the actual review, there's another similar board XY-S350H it's about 95% identical with minor difference, upon reading the review of XY-S350H on banggood there are many complain about no bass, and i watched an review that shows the power draw was limited ruclips.net/video/I0w3vJIRnQM/видео.html (its in Thai I google translated the text into English) , i wonder if ZK-AS21 will preform better than xy-350h
Hello. This AS21 has plenty of subwoofer bass and stereo bass.
I have been using the amp for the last few days and im not sure if i like it yet or not... the stereo channels have an immense about of low end coming through, like there is no crossover at all or anything, so its like the speakers get just as much bass as the subwoofer does! I CANT turn thr volume up more than a quarter of the way or the stereo channels are just too loud and over powered. With only bass and treble controls, its really difficult to find a volume that isnt over bearing or not loud enough. An external EQ is something to consider to help control the tone of the amp. Since i have not been able to actually test the power output, im starting to wonder if the amp just has a boosted signal or if actually puts out the power it claims. I think the HT21 may be a more solid buy but to clarify, i havent had any real trouble out of this AS21, it has plenty of bass for the subwoofer and stereo channels lol. Hope this helps, please ask any more questions if you need to
@@scarr3ll imgaz.staticbg.com/images/oaupload/banggood/images/D1/2E/147d8433-c725-4d7a-adca-1b4704c6b7db.jpg.webp maybe you can ask your seller about this
Speaking of how i mentioned it seems like the signal is boosted. I remember in my video reading you can change it from 30db or whatever. Id assume its already at 30db when sent to the buyer. But as i also mentioned, i didnt see any where on the board to attenuate the signal. When pairing it asked me to pair to an app, but i obviously didnt have it downloaded so it didn't work, and theres no mention of which app in the play store it is lol. But im not sure how you could Actually attenuate the signal with an app.... hell you could just turn your phone volume down instead.. just thought id mention all this aswell
Edit: found the app. As i suspected, master volume is 100%. I adjusted it to half, now just to see if the volume changes in aux mode, or if you can only adjust it during bluetooth. If only during bluetooth, i would definitely suggest the HT21 over this, if you can adjust everything and the settings stay in all modes, this amp may be a good buy after all. Ill do an updated review soon after playing around with it more now that i have the app and such
play.google.com/store/apps/details?id=com.jieli.case_jingbode_first
@@scarr3ll so? is it worth it? i'm between ZK-AS21 and ZK-HT21
@@OrAlkon short answer, get the HT21. Check my latest video about the HT21 vs AS21
Xy-s350h make a reviewwwwwwwwww pleeeassssseeeee
If its anything like the AS21 than its poop. The HT21 is a better buy. Update review coming soon
I just want a subwoofer amplifier module to run my jaycar response cw2198 10 inch subwoofer rated at 225 watts RMS? Otherwise I would love to see a review of jaycar Bridge module for amplifier? Cheers from Australia 🙂. Subbed and liked 👍
We don't have Jaycar in the USA, I'm not sure what you mean by Bridge module?
And thank you for the subscription! I plan to put new videos out soon. If you'd like to see something specific from my previous videos, please let me know.
@@scarr3ll it's a module that goes in between amp and source for running a a subwoofer