Cheap 200w 2.1 Amplifier - Wuzhi ZK-TB21 Unboxing Assembly and Test

The listing I bought it from: www.amazon.co....
Songs used (in chronological order):
Mortals - Warriyo • Warriyo - Mortals (fea...
Insight - Haywyre • Insight
Divide by Four Add Seven - C418 • Divide by Four Add Seven

[@izaias20silva35]

É impressionante um amplificador tão pequeno ter todo esse poder sonora com tanta qualidade, fantástico😱

[@xandegameplay]

Tem o link dele?

[@duh_matos_]

~e 2.1 x 5,5 o input pra fonte dele? seria o plug p4 ne? qual fonte eu adquiro pra usar ele?

[@folteaiustindaniel4099]

That woofer is beautiful😍.

[@speakeradventures]

Way cool video..that amp is pretty neat. Liked how you assembled it on camera. Nice speakers as well, good sound and clarity 👌.

[@DmitriNesterov]

Это определенно шедевр Д-класса! :-) Пойдем, поищем класс А :-)

[@RamilOmon]

@@DmitriNesterov qudoqq

[@Tampo-tiger]

Please don't say qudoqq my friend. It frightens the animals. @@RamilOmon

[@kolsuzlartime]

I had this amp. I really recomend it.

[@Perk-that]

Same

[@YureUre]

I have a qustion If you connect it by Aux , Do you have to adjust input mode by every time turn it on?

[@kolsuzlartime]

The device automatically detected inputs and it's automatically select which has the signal.

[@YureUre]

Thank you

[@AjitNishad-773]

1​@@YureUre

[@13091975daniel]

Am cumparat si eu amplificatorul.Merita chinezaria toti banii.Suna perfect!

[@scellysspeakers]

Ma bucur foarte mult

[@DmitriNesterov]

Ну я пока на том же уровне. 2.1 это всё, что я могу себе позволить. Но это не мешает мне развиваться! :)

[@zramonlopez4382]

Do you have the link for the subwoofer?

[@abdalmoman9572]

We need to try more speaker available in stores to choose the right one

[@jiangzhao1142]

I buy same model today, 59rmb(about 8$ us dollar) on Taobao, thanks your video, so helpful!😅

[@princecopenhagen7614]

Can you give the link on taobao?

[@TomTom-cn1vv]

For 10W such high output, wow

[@scellysspeakers]

the woofer isn't loaded in a box so it is free to move as much as it wants

[@Denisaviches]

Заказал себе это творение, 670 рублей всего, точно такая же модель, жду недождусь. Хочу сделать небольшой саундбар. Спасибо за обзор!

[@дмитрий-у5р1е]

Где заказал по такой цене?

[@ОксанаКоваль-х8ю]

Здравствуйте! Скажите пожалуйста где заказали такой усилитель по такой цене?

[@Denisaviches]

На озоне, была распродажа, открывалась на 5 часов. Была по 900 рублей, + бонусы списал. Сейчас уже дороже, от 1400.. Эх надо было 2 брать..

[@дмитрий-у5р1е]

@@Denisaviches спасибо за ответ! Не подскажете в чем отличие этого усилителя от zk-mt21?

[@ОксанаКоваль-х8ю]

​@@Denisavichesспасибо! Можно ссылку прислать сюда где заказывали?

[@ivin59]

Pwede itry din pano set up sa motor.. connection sa battery..

[@chancho00]

I have the model, ZK-MT21 but it looks exactly like this one, one thing I don't like is the Bluetooth for some reason skip like 2 seconds of the start of every song, no matter how many times reset, unpair and pair the unit, also if you turn the amp off the Bluetooth continues to be connected to my phone and I have to disconnect the power to be able to connect to my headphones, have you noticed any of this troubles or has been fixed on this model?

[@scellysspeakers]

Yes it's the same with this one. They all use the same jieli Bluetooth/aux chip. It is just how A2DP Bluetooth works, it takes a while for the chip to start the output after periods of silence because when there is no signal on the Bluetooth audio it mutes the output to reduce the hiss, it takes a while for it to realise there is music playing and to unmute it.

[@gbresaleking]

I just ordered the more poweful version of this cant wait til it gets here tomm

[@akari7477]

I own its little Brother zk-mt21 so good no hissing sound or the soind like its going to blow out

[@xtreepvps]

What woofer is that? It looks good 👍

[@scellysspeakers]

TCP115-8

[@CoajaCristiandance]

that is now a 200w speaker, but maximum 30W

[@scellysspeakers]

the woofer is rated for 40w RMS I think

[@spoon527]

I have this exact model and it powers 12in full sub 2 6in mid subs 4 mid range 4in stacked with tweeters.

[@ytfanlingeric]

How's temperature of your amp, does it get very warm? Thanks.

[@righteouslife4279]

Nice setup i love it sounds crisp and clear

[@phongnguyen007]

The tb21 is reaaly good one

[@Jamiejany]

I also got those tv speakers just salvaged them from a average cheap tv

[@carlogarcia5273]

Sir tnry ko iconnect s aux ung magjc sing pero ndi sya gumana.gumamit ako ng adaptor to rca cable

[@_salvo234_]

Had the same exact model then sold it to a friend, 14v 3A, however, he's pumping out a 15 inch subwoofer and a pair of 3 way speakers. Now i have the later version (160w+160w+220w) with 32V 10A and it managed my two 12 inches subwoofers so well, sold 'em and got a single 15 inches, but still rocking it.

[@xNickerishx]

do you have a link

[@sergio13810]

What power adapter can i use with this amplifier? I cant find one around 30v and 8-10a i want to use a 10” sun with 6.5 2 way mids

[@_salvo234_]

@@sergio13810 24V 10ah

[@خسروافشاریان-ل4ن]

سلام مهندس جان چند قیمت و چند وات است ممنونم ❤❤❤❤❤

[@Tampo-tiger]

I wonder if it would sound ok through really nice speakers?

[@scellysspeakers]

Being a cheap device it definitely won't be audiophile levels of quality, but for non professional stuff I think it would be fine. Beware though that the 3.5mm input seems to have issues with these devices.

[@marcmolina6029]

Nice amplifier small but powerful how can order like that my friend 🥰

[@spapauw9384]

5:30 name of the song?

[@scellysspeakers]

All songs are in the description

[@bryannedamo384]

idol pwede mag tanong ilang klase ba ang amp na ganyan..mallit hanggang sa malaki

[@Geniusinventor]

I am interested in this amplifier. Can you tell Dose it has any start-up thumbing problem?

[@scellysspeakers]

No there is a delay from it turning on and the speaker output being enabled

[@Geniusinventor]

@@scellysspeakers thank you 😊. I have a problem with the Tpa3116d2 amplifier. It does that start-up thumbing.

[@scellysspeakers]

@@Geniusinventor I personally have not experienced it, you can see in the video when I power it on with the speakers connected that it's silent until the Bluetooth sound plays.

[@Geniusinventor]

@@scellysspeakers how is the sound quality on it? Does it have distortion on higher volumes?

[@scellysspeakers]

@@Geniusinventor Sound quality is generally good, there is distortion at high volumes if you use a power supply less than 19v.

[@NelsonCastillo]

I own a few and one by FOSI Audio. They are great for my use cases. The only think I dislike is that when I have aux connected the Bluetooth chip is still available for pairing, and it's not good to have your music stream interrupted in the best part. I've though of hacking the device to add a switch -- not sure it's easy to do. I've even thought of cutting the antenna and using external Bluetooth receiver. Thanks for the video.

[@scellysspeakers]

Yes that's common with the jieli microcontrollers on them, they can be flashed with firmware that gives aux priority over Bluetooth so you can't connect to it when aux is connected. I so far have not found any way to do this though. There are some forum threads online that discuss it but don't have any success.

[@plgsekip]

if only you could show us how to cut the bluetooth output to the preamp section.... or perhapas any idea to mix the signal from bluetooth with some signals from microphone preamp?

[@KGrasso89]

I have this exact amp I bought 2 years ago and have abused it daily and it still works perfectly. However at some point the Bluetooth range went from a dismal 10' range new to about 12"! I literally had to leave my phone on top of the amp to get clear reception (have another 100wx2 amp that does this too). I bought a cheap Bluetooth antenna from parts express($5) and cut the PCB antenna about 5mm in and soldered the tiny antenna wires to it and now my range is about 20 feet! The antenna is a chassis mount and the antenna can unscrew from the mount. I drilled a hole to mount it in the top cover and when the antenna is attached lays almost flat with the cover. Antenna and cover are parallel to each other.

[@KGrasso89]

@voodooyam I've been very happy with the performance of the amps I own with exception to the Bluetooth range. I have no idea how the range can deteriorate like it did. I use one to power 2 old Polk speakers and an 8" subwoofer hooked to my TV. Another is used to push 4 8" ceiling mounted speakers(2 on each channel in parallel to make 4ohm load) in my enclosed porch.

[@Mavi222]

I wish I had a switch for bluetooth because my stupid neighbors are at the edge of the bluetooth connection and some idiot tried to connect to my speakers once, and now every time he's at certain range his phone tries to connect to the bluetooth and it does the constant "connected" sound.... :/ kinda wish I could disable the bluetooth completely if I can't toggle.

[@jamescarpio1105]

THE BEST YAN ANG LAKAS KAHIT MALIIT GAMIT KO 8 once 6" 2pcs. Parallel galit kapit bahay ko😅

[@BENCHAABELHARIZI]

How much does it cost and is delivery available to Algeria? Thank you

[@farhankhan-dh2tu]

I don't like those small speakers... Plz use huge cheap woofers... U might see the change clearly

[@scellysspeakers]

I have bookshelf speakers I can use but haven't gotten around to connecting them because they are currently connected to my computer amplifier

[@_salvo234_]

Tried the same exact amp with a 15inch subwoofer and a pair of three way speakers, absolute monster.

[@justins.1283]

That amp looks to be about right to use for making a portable boom box.

[@ijumpshot2613]

@@justins.1283 just thinking this. I think I'm gonna do it in the future. My girlfriend got a boombox3 recently but I'd like to my own now. Maybe I'll do two of them to make it better than the boombox. Definitely a cool project.

[@_salvo234_]

@@justins.1283 It is, it has a very little power draw, if you don't attach a subwoofer to it ofc

[@Z340_1]

This amp is very good but on online shop in my country some people sell it with fake Ic not the real Ic.Wuzhi zk tb21 using tpa3116 2.1 Ic,the fake ones use the others and it's not tpa3116 2.1, u can check it by opening the heatsink

[@scellysspeakers]

I think the ZK-MT21 is the one with the fake chip, you can also tell by looking at the components next to the speaker terminals.

[@nikolaprislin598]

can this amplifier be connected to the car?

[@scellysspeakers]

Any amplifier can in theory be connected to a car, but this one is not designed for that purpose. It doesn't use the connectors and wire harnesses that are for cars. You create your own custom harness for your car to connect to it and power it from the car's battery, but you will have to make these adapters and harnesses yourself.

[@brijeshdogra1]

what is the cost of that amplifier without speakers and woofer

[@scellysspeakers]

£22 from amazon

[@mbontotsetrong6411]

I just bought it and......wow tiny little cayenne pepper

[@shirleycabilan]

Bakit mag trip 1:25 off zk tb21 amp.ko pag nilalakasan ko....Ang power supply ko 12v 2a.lng ok ba Yun o hindi.paki sagot po naman Kong Ani Ang tamang power supply at amperes

[@techfitness8324]

Can I use 8 or 10 inch subwoofer with this device ...

[@scellysspeakers]

You can as long as it is 4Ω or more but you'd probably want a bigger amplifier for something like that

[@The_Brick_Zone]

Hey guy’s what’s the RMS I have a 8inch 100w rms 200w peak sub with 8ohms and some speaker with 50w Max. 24V 6A power supplie is that ok or do I have to use a lower power sub?

[@zodiacfml]

This can do 50w RMS @ 4ohms on the subwoofer, so only 25wrms on your 8ohm sub. Also 50wrms for left+right channels.

[@Дядянарыбалке]

18- 20 ватт rms ,будет выдавать ваш сабвуфер при данном питании ,слишком много 8 Ом ,нужно 2 Ом

[@kuttermane2450]

The lower the ohms are the more power they pull,which in all actuality gives you more from your amp

[@v.k.ssenapati8082]

Is it class D amplifier?

[@scellysspeakers]

Yes TPA3116D2 operates as a class D amplifier

[@M.B.-Bulgary_Damenko]

Hi! Is it possible to use a switching power supply with a power of 150 W 24 V 6 amps, but not 5 amps???

[@TanJianWei92]

i've searched these matters before.. as long as you use 12-24v with at least 5a, example 12v 5a or 19v 5a, you can power it up but the speakers might be distorted on higher volume, if you're not using 24v.. but amps must be sure to match or higher.. do not get anything past 24v for this

[@M.B.-Bulgary_Damenko]

@@TanJianWei92 It is recommended to use 24v 5A, but I have a 24v 6A power supply.

[@женяиванов-ф8т]

Нужен 25в , 8-10 ампер

[@rodrigoamorim5537]

Este amplificador é sensacional! Recomendo muito para quem gosta de musica e de pequenos projetos qualidade HIFI. Alimentação em 19.5v 4a. Toca muito. Compre e seja feliz.

[@ezequiasdossantos3701]

Quanto é a potência desses alto-falantes

[@rodrigoamorim5537]

@@ezequiasdossantos3701 Os que eu utilizo em casa são (1 Tweeter Ultravox de 150rms; 1 Woofer Eros de 10 polegadas de 300rms e 1 sub Eastech de 250rms)... OBS: os falantes são mais potentes, mas desde que vc respeite a impedância... Vai tocar muito. Para meu uso está excelente.

[@BananaeEntretenimento]

@@rodrigoamorim5537 Sim, eu testei colocar a impedância abaixo de 4ohms pra testar o sistema de proteção, quando aumenta muito o volume, ele desliga para proteger o sistema, muito bom esse amplificador.

[@georgedacunha6236]

@@ezequiasdossantos3701 Eu tenho um apesar no manual diz 2 falantes de 50w cada e um sbwoofer de 100w porém eu uso caixas mais fortes que isso no talo a unica coisa que venho reclamar é dos vizinhos que vem bater na minha porta pedindo para abaixar o som kkkkkkkkkk

[@belinhampeg5486]

Curuis😮.. lascou tudo uai😅

[@soyelbarcena627]

Que marca y modelo son las bocinas?

[@scellysspeakers]

El woofer es de Dayton Audio, TCP115-8 y los parlantes más pequeños son de un televisor JVC, no tienen un número de modelo específico.

[@amitagrawal7748]

Bus ya car ya Tector ya koi bhi bahan me chala sakte hain ishe

[@zodiacfml]

wow 700k views for a device like this on a channel with 2.7k subs. congrats! I exactly have a copy of this but it has completely no right channel using AUX/Line IN. another problem is electronic noise at higher gain/volume setting. Electronic noise disappears when you don't play anything or immediately after stopping audio. Do you have a problem like this?

[@scellysspeakers]

I have had some issues with the 3.5mm input where I'd have to hold the connector a specific way to make it work, but it hasn't been an issue for me since I am using it almost exclusively with Bluetooth. As for the noises, I think that's just part of the experience with cheap Bluetooth devices. I haven't noticed it much because I don't use it at very high volumes.

[@zodiacfml]

​@@scellysspeakers thanks! my dilemma if I should return mine. I also resorted to Bluetooth but it is not too reliable under Windows PC once I started touching settings, on top of the tiny latency. The small amp is indeed powerful but I did a lot of tweaks to enhance low bass/subwoofer channel while reducing the rest of frequencies. now I'm around 80% volume. I slightly made the noise less noticeable by using smaller weaker main speakers and reducing treble on device and equalizer. anyways you say it is normal so it won't make sense to return mine and buy a more powerful one like the Zk-HT21. I'll probably reuse this amp for a DIY bluetooth speaker in the future. thanks again, subbed!

[@vdsmade]

Super 😎👍💣

[@tesstickle1182]

i want u to use this in car with car stereo..

[@dylanortiz6357]

I have the upgraded version with th2 cooling fan and it feels like it will burnout a pair of sony lbt soeakers and a 10" sub

[@scellysspeakers]

When pushing a lot of power through it you will absolutely need a fan

[@dylanortiz6357]

Agreed, but the small one is impressive with the right power source, I'm running a power source with 24v @ 3amp and it makes the amp run solo good

[@Aivideos-g1p]

Subwoofer name , power and online shopping link 🙂

[@virtualnoor2]

Bro you should have used case woofer to test

[@scellysspeakers]

I don't have one, that small woofer was all I had to test with.

[@byahengmatatag]

Matik nb to n may bluetooth?

[@wisnoeaprijadi3853]

Is there any video review of the Sinilink Xinyi amplifier?

[@scellysspeakers]

There are some reviews on KZbin for this, but maybe one day I'll make my own.

[@jaysongidorio9947]

Maliit lng cia pero sulit nman tumunog

[@pahlevirei]

Have you tried the AUX-in plug? I have this amp, AUX-in jack is Mono, Bluetooth Stereo. don't know if it's original or not, my unit has a tpa3116 D2 32pin IC

[@scellysspeakers]

Many people have reported the same, I think it is a design flaw. On my unit I have full stereo, others report is is mono.

[@DJLAWOLF]

When you see 200 watts those speakers look like they came out out of a TV can flat screen TVs use those kind of speakers

[@scellysspeakers]

Yes this amplifier is described as being able to output 200w, but I'm not driving it even close to that in this video because I do not have any speakers even remotely capable of it. It's more of an unboxing/building/simple test video.

[@Iinustechtips]

also, which subwoofer are you using?

[@scellysspeakers]

Dayton TCP115-8

[@tulokapiklo]

Hi. Some say, with aux sound is mono. Did u encounter that?

[@scellysspeakers]

I have been using it with aux mode and have not experienced this, however the connector is very fussy with what cable I use. Some cables do not give a good connection and only work at specific angles while others work perfectly.

[@Dane_Naraine]

Bro what’s the name not the bass speaker?

[@Bagchaser2233]

I got the same amp but mines sound distorted and chaotic

[@scellysspeakers]

What power supply are you using?

[@SuperAtung]

Spec wofer and satelite please?

[@nullnullgermany7641]

Super Preis Leistung Verhältnis

[@emesacolney2756]

Can i use 12v 10ampere, is it enough for power supply

[@scellysspeakers]

You would want to use a 24v power supply of at least 5 amps current capacity to get the most out of it, if you use anything under 18v it will distort heavily at high volumes.

[@emesacolney2756]

@@scellysspeakers but 10A.

[@scellysspeakers]

@@emesacolney2756 That bit is fine but you won't get the full power out of it unless it's a 24v input, no matter how big the current capacity is you will still get distortion at high volumes if it's under 18v

[@emesacolney2756]

@@scellysspeakers thanks, ...... I ordered on amazon and almost arrive, ZK TB21

[@scellysspeakers]

@@emesacolney2756 I hope you enjoy it when it arrives!

[@jordankirkham1657]

Careful with that amp i had one where the sub output blew after 2 days, and the left channel blew a week later and almost broke my speakers

[@scellysspeakers]

what impedance are your speakers and what voltage power supply did you use? these amps tend to overheat under sustained full power 4 ohm loads

[@jordankirkham1657]

@scellysspeakers the voltage was 24v with 4 ohm speakers

[@zotv923]

Sur,whats your sub woofer name/model?

[@scellysspeakers]

dayton audio tcp115

[@BombasticVirus]

what does the frequency knob on the bass do? i mean the range is already between 20 to 200.

[@scellysspeakers]

it adjusts the low pass filter for the subwoofer

[@techsoundph6210]

Ano magandang 2way fullrange speaker para sa ZK-TB21 at ZK-HT21? Yung available sana sa pinas

[@techsoundph6210]

*Para sa Left and Right channel

[@scellysspeakers]

@@techsoundph6210 There is too much variety for only one recommendation, any passive 2 way speakers can be used. I use Eltax Monitor iii but any other models can be used as long as the impedance is 4-8 ohms and it can handle the power from the amplifier.

[@HappySlappyFace]

Gamer amp

[@Arnie_Liv]

does it automaticall power down after no input for a certain time?

[@scellysspeakers]

No it stays on

[@Arnie_Liv]

@@scellysspeakers thanks

[@impopio4987]

how to avoid humming buzzing noise?

[@scellysspeakers]

Make sure you use a power supply with very little DC ripple

[@impopio4987]

@@scellysspeakers can u suggest? what kind ?

[@scellysspeakers]

@@impopio4987 The best case scenario for clean DC power is an appropriately protected battery pack of the correct voltage, but almost any normal power supply of at least 20v should be fine.

[@ssanjoyd]

Which driver you using for base?

[@scellysspeakers]

TCP115-8

[@gilbertonovais5951]

bom amplificador 👍

[@electrokirana3668]

Hello friend the ic was hot or normal during playing time

[@scellysspeakers]

After a while I can feel the top plate is warm near the heatsink at about 60% volume for both L/R and subwoofer channels, it isn't hot enough to be a concern but if you are pushing it 100% for a long time I suggest adding a fan

[@electrokirana3668]

@@scellysspeakers Thank you

[@ihyaSakti]

Great.. 👍

[@Iinustechtips]

how much was it when you purchased it?

[@scellysspeakers]

£25.99

[@Iinustechtips]

do you think it has the power to drive a 10 inch sub?

[@scellysspeakers]

Probably but it might not drive it with very much power

[@deffington6627]

Hi, one problem I have with this board is that I see no BT-Wuzhi in bluetooth devices. Is my board bad, or is there a way to rest BT?

[@gaborkovacs189]

BT is off on my device when aux is connected

[@jejeykun6713]

is it on normaly temprature if i put 19v ? for daily uses ? not hot / overheat??

[@scellysspeakers]

For constant use I suggest you use a small fan on the heatsink to keep it cool, it will get hot if you use it at high power continuously.

[@jejeykun6713]

@@scellysspeakers thanks my broo... i've been subscribe to you 👌

[@youtubehugo9919]

Subwoofer brand?

[@scellysspeakers]

Dayton Audio

[@youtubehugo9919]

@@scellysspeakers can i buy in India

[@scellysspeakers]

You should be able to, they are distributed globally

[@youtubehugo9919]

@@scellysspeakers okk

[@jhas1980]

No Crossovers?

[@scellysspeakers]

It uses a crossover for the low pass filter on the subwoofer channel

[@jhas1980]

The amp already has a crossover for the woofer?

[@scellysspeakers]

@@jhas1980 Yes it only lets a frequency below a user-defined value to the woofer, that is what the subwoofer frequency knob does.

[@jiangzhao1142]

@@scellysspeakers Can I use it as a 2.0 amplifier? I don’t want to connect a subwoofer for the time being, will there be any sound loss?

[@scellysspeakers]

@@jiangzhao1142 You can, but the left and right channels have a high pass meaning the bass will be cut off. This amp is designed to dedicate all low frequencies to the subwoofer channel.

[@zombieryder]

hello, what are the specs of this woofer? size? watts? ohms?

[@scellysspeakers]

Dayton audio TCP115-8, 4" 40w RMS 8Ω

[@emosch_20]

Do I need a 100w subwoofer or can I use the 800w ?

[@scellysspeakers]

You can use a 800w subwoofer, but this amplifier will not drive it at its full potential. Also, if you are going to use the amplifier at full power for a long time, make sure you keep the amplifier chip cool with a fan on the heatsink.

[@TahirKhan-nh4wy]

Market Mein available hai kya aur price kitna hai uska

[@scellysspeakers]

मुझे यकीन नहीं है कि क्या आप इसे अपने बाजार में पा सकते हैं। इसकी कीमत £26 GBP है

[@galahad3750]

Does your subwoofer clip at high vol?

[@scellysspeakers]

Yes it bottoms out, it's only designed for around 40w RMS

[@frostysleeps7727]

Could you use a rechargeable battery?

[@scellysspeakers]

if its of a sufficient voltage then sure

[@christianjohnplacido5639]

Kaya poba nian120watt na speaker ko? 12v 6amp na power supply

[@Rex_two]

What a subwoofer?

[@SeanbaiSuryvanshi]

Can you share the subwoofer purchase link please

[@scellysspeakers]

www.amazon.co.uk/TCP115-8-Treated-Paper-Cone-Woofer/dp/B07C7MY2D5 This is where I bought my one

[@mukeshkamboj7654]

Subwoofer's specifications and Brand ?

[@scellysspeakers]

dayton audio tcp115-8, 40w RMS, 8 ohms

[@makecreativeprojects]

wow great

[@navteh534]

why buy tb21 instead of mt 21? whats the difference?

[@scellysspeakers]

TB21 uses genuine Texas Instruments TPA3116D2 amplifier chips and has more filtering circuitry, MT21 uses a Chinese chip and has less filtering.

[@denspants7852]

Question... the bluetooth is always on even if the power/volume knob is off. is there a way to add a switch or tie the bluetooth power to the knob??

[@scellysspeakers]

For me turning the amplifier off also turns off bluetooth. Maybe you have a different model or a fake version?

[@denspants7852]

@@scellysspeakers just plugging the amp to a power source turns the bluetooth on even if the volume knob and the indicator light is off.... i might have a fake one. do you have the datasheet of the bluetooth ic? ive been looking for the it but no luck. maybe i can mod the ic and add a physical switch.

[@denspants7852]

​@@scellysspeakersi mean u can try it on the amp. unplug everything connected the amp... make sure to turn the amp off... plug to power... then scan the amp bluetooth or connect to it....

[@scellysspeakers]

@@denspants7852 yes when i turn the power off from the volume dial it also turns off the bluetooth chip, when its connected to power but turns off there is no bluetooth signal broadcast, i don't have the datasheet because it is unfortunately proprietary

[@denspants7852]

@@scellysspeakers mine does not turn off. maybe its fake.😥😥😥

[@tysinner]

what’s the difference between this amplifier and the zk mt 21

[@scellysspeakers]

MT21 uses a generic chip instead of TPA3116D2 and has fewer supporting components

[@steemo1385]

How did you change the name of the Bluetooth name

[@scellysspeakers]

You need to use the sinilink app but I don't trust it much

[@mihaifodor7919]

Suported 4 or 8 ohm? Thank you

[@scellysspeakers]

It supports 4-8 ohm speaker drivers according to the datasheet for the amplifier chips used.

[@tm02019]

I am using this circut, it't good enough for me

[@The_McCoon]

What to do when it turns on the. Off

[@Дядянарыбалке]

Он расчитан на саб 100 ватт 2 Ом, 50 ватт 4 Ом х2,при питании 24 вольта 10 ампер

[@maZAR_biker-zx250...]

bas mantap gak bos

[@jairoramirezfonseca6669]

Que bocina utilizaste para la subwoofer ? Necesito saver

[@scellysspeakers]

Dayton Audio TCP115-8

[@jairoramirezfonseca6669]

Muchas gracias !!!!!!!!!!