Summer Project - Make an INSANELY LOUD Bluetooth Amplifier!

  • Опубликовано: 17 авг 2015
  • Here's the amp we'll be using Amazon:
    eBay (ships globally):

    In this video we'll be making a wireless bluetooth-enabled amplifier so that we can put old bookshelf speakers to good use!
    Not only is the sound quality fantastic, but it can also go super loud! It's also quite easy to build, and doesn't require any special tools - you can get away with just a hammer, nail, and a screwdriver if needed. Seriously!

    Full parts list (includes international purchasing links):

    Happy building!
    Oh, by the way, here's the note about the little switches:
    These switches change the gain mode of the amp. If they're both on, the amp can reach insane(er) volume levels. However, to hit these volume levels without distortion, the amp needs 25v, which is more than our batteries can provide. The amp is loud enough with them off, and it also means that the signal to noise ratio is MUCH improved, so I don't really recommend messing with them.
  • Хобби и стильХобби и стиль

Комментарии • 3 818

  • DIY Perks
    DIY Perks  Год назад +149

    Now it's even cheaper! $11.88 from here, and it ships from the US:

    • Zahid Shah
      Zahid Shah Месяц назад

      DIY Perks I found one at $7 at aliexpress

    • DEADPOOL 55
      DEADPOOL 55 2 месяца назад

      Hello I got one of those and I was trying to change the mode but my screwdriver slipped and hit the two contacts on it and the sound stoped but the bored was still on and Bluetooth and it was all connected but I could not get the audio to come out again I put it in the other connector it didn't come out I put it on another one and it still didn't come out so all I'm asking is can you find a solution or help me please thank you

    • lucasrosmano
      lucasrosmano 2 месяца назад

      Hey, man! Nice video! If I use this will be louder?
      Thank you!

    • Bas Ketbool
      Bas Ketbool 2 месяца назад

      DIY Perks ทำ

    • jakob findlay
      jakob findlay 3 месяца назад

      i have a question about your 2 bluetooth speaker builds in your opinion which of the 2 has better audio quality this amp or the one in the concrete speaker?

  • Big Iris Productions
    Big Iris Productions 3 дня назад

    Happy to say I made one and it's pretty incredible! Super loud! I take it with me when I go buy speakers from people so I can test the speaker. Found out one guy was trying to sell me a dud subwoofer. Ha! Nice work!

  • Christian Siefen
    Christian Siefen 7 дней назад

    if i wanted to turn this into a Wall Plugged bluetooth speaker how much amperage does the amp need to be able to draw? i want to find a proper adapter

  • lindner daniel
    lindner daniel 11 дней назад

    Das teil schluckt das aber bei zeiten leer

  • Quit
    Quit 16 дней назад

    Could i use a 19v 3.4a laptop power supply?

  • Luke Harket
    Luke Harket 17 дней назад

    @DIY Perks Is the 50Watt output from amp Peak or RMS and what are your speaker ratings? (impedance and wattage) Many thanks

    • Luke Harket
      Luke Harket 17 дней назад

      Have you considered using Lithium ion batteries for CCTV cameras instead? I think a few in parallel how last a lot longer

    • Luke Harket
      Luke Harket 17 дней назад

      This is an awesome simple build bwt, one of my favourite so far! The criticism is the battery life, surely it only runs for like 15minutes with 10, 1300mAh batteries?

  • pripras samanta
    pripras samanta 21 день назад

    Hello there I am your new subscriber and really like all of you works alot.
    Pls keep my one request please make a video of making coustomized wooden boom box with this tda7492 Bluetooth amp ckt with display and ir blaster(remote function).
    Please help me with this I really want to build one.
    Thanks in advance.

  • antoine serry
    antoine serry 24 дня назад

    Hi, when I power it and connect over Bluetooth i'm getting a very annoying background noise and I think it's going to push me to the purchase of another model, but has anyone an idea if it's normal for this amp or if mine is poorly built ? (I checked the two switch are on off and my power supply is a 2A 12 volts transformer)
    Thanks !

  • MEH man
    MEH man Месяц назад


  • Fabio Candido
    Fabio Candido Месяц назад

    Its much cheaper if you buy a 12volt batterypack they fist about 15$

  • Osjohn Magpale
    Osjohn Magpale Месяц назад

    i love this man alot! more power DIY Perks!

  • alex hair
    alex hair Месяц назад

    Fantastic idea, one modification I would make is to upgrade to li-ion or li-po batteries, though.

  • sidfebkj
    sidfebkj Месяц назад

    Hello, do you know if exist for make a 5.1 system?

  • Tiziocaio
    Tiziocaio Месяц назад

    2100mA battery.
    2amp*1.5V * 10 batteries.
    15+15W for 1h.
    10+10W for 1.5hours.
    50+50W for 20mins.

  • Kieran Nally
    Kieran Nally Месяц назад

    can I connect uk mains to the card?

  • rockey Saini
    rockey Saini Месяц назад

    You gandu boy

  • Samster Birdies
    Samster Birdies Месяц назад

    wahoo finally enough power for my headphones

  • Yatin Manocha
    Yatin Manocha Месяц назад

    hi very nice video tutorial. I am planning to do the same project for my car, i dont want to spend on costly branded music systems and this seems to be in budget and also makes for a wireless music system. I have 2 speakers (power range 20W-40W) already installed in my car, i want to use this circuit to power these speakers, however i am having problem in deciding how to power the amp? can i use the wire which use to power the current audio unit? but then i feel 2 problems - one that it doesn't fry up the circuit during the ignition process, 2nd to attach a switch control to switch the amp on and off.
    basically i want to knw how should i provide a reliable power source for this inside my car. And also if it is recommended to use in car or not since the amp has a very high distortion value of 10%.

  • shockie paul
    shockie paul Месяц назад

    Hi may I ask how long do the power sells last plz as I may make one but change to a longer lasting sell.regards

  • Scooba Doo
    Scooba Doo Месяц назад

    hi i saw this. hoping that you can read this. can i use 18650 batteries and should i solder it also in series?

  • Beboop Bedoop
    Beboop Bedoop Месяц назад

    This song is called season 2

  • Kyle B
    Kyle B 2 месяца назад

    Just picked this exact amp board up. Pretty sweet for the price. Plenty loud, the Bluetooth works better than my expensive Sony amp receiver. I think that audio sounds so clear here partially because of the clean power source. I used a 19 volt laptop power supply, there's a slight hum I have to keep gain and volume down a bit, I'll try other power supplies too. Wonder if you can bridge the channels on this. I bought this amp with an included little acrylic case for $20, using a nice pair of bookshelve speaker to listen to music while I brew beer.

  • Eddy Yu
    Eddy Yu 2 месяца назад

    Great job, guy!

  • Avi Assayag
    Avi Assayag 2 месяца назад

    I'm sorry to say - but the whole thing doesn't work for me. II followed the instructions to the letter - and the cheap Chinese receiver didn't function. I had to throw it away, a real shame :-/

  • Basti !
    Basti ! 2 месяца назад

    1:11 the butterfly is thinking like kill me please

  • Prince of Bama Dillingham
    Prince of Bama Dillingham 2 месяца назад

    So I could power thur the fuse box in a car ?

  • Amanda Hugenkiss
    Amanda Hugenkiss 2 месяца назад

    Baad asss

  • Anirudh Sharma
    Anirudh Sharma 2 месяца назад

    can i use my 19 v 3.3 amp 60 watt charger.......if not please give another alternative........other than your smart charger ...thanks

  • Nadir Ilyas
    Nadir Ilyas 2 месяца назад

    I love You bro Your invention is amazing

  • felix lu
    felix lu 2 месяца назад

    hey bro the problem is that how you charge the battery? and what kind of battery you use?

  • Romulo Ceretta
    Romulo Ceretta 2 месяца назад

    How many W and ohms in each bookshelf speaker?

  • Erik Stanek
    Erik Stanek 2 месяца назад

    Hi, very smart video. I like this, because ist's cheaper than other building instructions.

  • Anel Redzic
    Anel Redzic 2 месяца назад

    But how to charge it????

  • Anel Redzic
    Anel Redzic 2 месяца назад

    But, how to recharge it?

  • Pra Yag
    Pra Yag 2 месяца назад

    Does 2x9v battery is enough to power this ?

  • tri poloski
    tri poloski 2 месяца назад

    eh i dont want my amplifier to be loud i want my speakers to be loud..

  • Albert Magdelphi
    Albert Magdelphi 2 месяца назад

    Android app for all bluetooth audio device

  • Fran Maric
    Fran Maric 2 месяца назад

    Can you use that 3.5mm jack as audio input?

  • Emmanuel Bekele
    Emmanuel Bekele 3 месяца назад

    you dumb bitch. 12 volts kill the amp

    • Emmanuel Bekele
      Emmanuel Bekele 3 месяца назад

      you didn't say shit about wattage
      learn something for fucks sake

  • TheResidentSkeptic
    TheResidentSkeptic 3 месяца назад

    I finally got around to building this, but that amplifier is very distorted, even at just 75% volume with gain off. What gives?
    I've tried 8ohm speakers at 20v, and 4ohm speakers at 12v - same thing. Sounds like a dollar store stereo...

  • Another Dick
    Another Dick 3 месяца назад

    Its loud more because speakers high sensitivity, 50w isnt something crazy loud.

  • Allan Camara
    Allan Camara 3 месяца назад

    Hi! Do have any update for this video or build? Like adding a subwoofer?

  • GabrielTheGuitarist
    GabrielTheGuitarist 3 месяца назад

    Those are some really nice speakers...

  • GlareSoul
    GlareSoul 3 месяца назад

    How long does the batterys last?

  • Giossy
    Giossy 3 месяца назад

    How can you recharge the Batterypacks in these battery holders without taking them out?

  • Milton Freeman
    Milton Freeman 3 месяца назад

    this thing actually works just make sure u get the right one

  • Sebastian Beattie
    Sebastian Beattie 3 месяца назад

    What song was that? i love it!

  • cool guy
    cool guy 3 месяца назад

    That is seriously overpowering the drivers

  • Philip Feghaly
    Philip Feghaly 3 месяца назад

    Hey Matt,
    1- i have 2 spare 6 " speakers that i want to use for this project ( 25 W Nominal power & 240 W max music power ), Will the TDA7492P 50W+50W cover my needs ?
    2- i want to use 3.6 v 18650 batteries and charge them without the need to remove them, what additional hardware i need ?
    3- should i use 3.6 v * 3 or *4 or *5 (10.8 v or 14.4 v or 18 v) aiming for high volume.

  • charlie brownau
    charlie brownau 3 месяца назад

    higher bass doesnt equal louder volume if your going to only hear bass and miss out on guitar and vocals

  • mukesh kaviyath
    mukesh kaviyath 3 месяца назад

    How to charge those batteries? Can we use the same power jack?

  • xX_AceHunter_Xx
    xX_AceHunter_Xx 3 месяца назад

    you sir must be awarded =)

  • Yağmur Bayrakdarlar
    Yağmur Bayrakdarlar 3 месяца назад

    Hi, what camera did you use in the field , end of the video?

  • Göran Gustafsson
    Göran Gustafsson 4 месяца назад

    does anyone know a similar amp but for 2*120W?

  • Des Chew
    Des Chew 4 месяца назад

    Well done. Enjoyed watching your video. A worthwhile knowledge learning session. While I am might not build one same as urs as we live in city and apartment. How about giving a tutorial to build a mini Bluetooth speaker?

  • niknik992
    niknik992 4 месяца назад

    Is there the a way to use this with a power bank powering it? All those batteries seem like a hassle to buy and charge every time?

    NIK TECH 4 месяца назад

    It's called amplifier not blaster

  • Peter Hindes
    Peter Hindes 4 месяца назад

    what power jack do you need?

  • ibles bosuok
    ibles bosuok 4 месяца назад

    Awesome park

  • fredrik 887
    fredrik 887 4 месяца назад

    how is the piano background called?

  • Utkarsh Mathur
    Utkarsh Mathur 4 месяца назад

    Can i connect this directly to the socket instead of using batteries.
    If yes then what all precautions should i take?

    • Awais Ali
      Awais Ali 4 месяца назад

      you will need a 12V adapter

  • Julian Anthony
    Julian Anthony 4 месяца назад

    Hey do you know how I can add an equalizer on to this?

  • D- Gadgets
    D- Gadgets 4 месяца назад

    Hello. Can you help me? I want to know how to fix the loud poping noise when i turn on the switch!? Its making the speakers pop really loud when i turn it on..... Please help

  • Andrew Lofthouse
    Andrew Lofthouse 4 месяца назад

    why didn't you use a power brick, like a Navpower.???

  • Andrew Lofthouse
    Andrew Lofthouse 4 месяца назад +1

    how long did the batteries last??????

  • saad 208
    saad 208 4 месяца назад


  • Ali Waqas
    Ali Waqas 4 месяца назад

    Wasted your whole video on that fuc*ed up Music

  • Lev SC92
    Lev SC92 5 месяцев назад

    Can you also connect it to the car battery since it's 12v D.C.

  • Vedant Ghadi
    Vedant Ghadi 5 месяцев назад

    Oh thanks, but I will prefer DC adapter instead of batteries, as they will make my amp smaller..... and more powerful on 25 V!!

  • RighteousBruce
    RighteousBruce 5 месяцев назад

    How would one make like... 6 bookshelf speakers powered by mains but as one input to my PC via bluetooth or 3.5mm?

  • skyblou 87
    skyblou 87 5 месяцев назад

    Work 2x9v ?

  • Mohammad Ali
    Mohammad Ali 5 месяцев назад

    Super amazing video

  • Miguel Pagan Sr
    Miguel Pagan Sr 5 месяцев назад

    You’ve inspired me to build something, I’m thinking of making a cooler radio build. I have the amp with its own 24 volt power supply and I’d like to add Bluetooth to it but the Bluetooth only runs on 12 volts, any ideas? Thanks

  • Dragos Cutian
    Dragos Cutian 5 месяцев назад

    This guy looks like Jerry from Rick and Morty which is weird because Jerry is a retard.

  • Truth Seeker
    Truth Seeker 5 месяцев назад

    : ) !!

  • Ronald Lobo
    Ronald Lobo 5 месяцев назад

    I would like to know how much voltage battery u have used to do this.

  • Ronald Lobo
    Ronald Lobo 5 месяцев назад

    I have brought the same chip but the sound on that chip is getting cut on bloototh and audio jack is not giving sound so what u think is there issue with chipset or I am going wrong.

  • Paul Leishman
    Paul Leishman 6 месяцев назад

    RIP neighbors

  • Ahmad Idul Fatri
    Ahmad Idul Fatri 6 месяцев назад

    Song is hooky with sloane audio library

  • Alex L
    Alex L 6 месяцев назад

    18650's with a balance board would have made things smaller (due to higher voltage per battery), higher runtime, and the ability to be charged properly

  • anto leyo
    anto leyo 6 месяцев назад

    Wonderful garden! I want to eat em all nyum-nyum-nyum

  • 3.467328168890698e+23
    3.467328168890698e+23 6 месяцев назад

    I want to connect my computer to the speaker, but it can't find the bluetooth driver, is there a way I can create one or a site where I can download it?

  • Rafael Almeida
    Rafael Almeida 6 месяцев назад

    Why did he used a battery instead of plugin in to the wall outlet ?

  • Plester
    Plester 6 месяцев назад +15

    All the other kids with their pumped up kicks better run better run...

  • Mogalize
    Mogalize 6 месяцев назад

    How long do the batteries last? Any chance of getting 10-12 hours from a battery pack?

  • Taco J
    Taco J 6 месяцев назад

    i need an amp that can take 7 speakers that includes 5 high-mid speakers 1 bass speaker and 1 high speaker

  • luke leunes
    luke leunes 6 месяцев назад

    I just bought 2 :)

  • Savage Tech
    Savage Tech 6 месяцев назад +1

    Can i use an 11.1v lipo battery?

  • Levi Jones
    Levi Jones 6 месяцев назад

    ok this is damn cool, considering the size of the batteries is there any system involved to let you know the battery level? Could you add something on like an LED to read out said level?
    Also could I bypass the volume buttons and replace them with a potentiometer?

  • I Make Things
    I Make Things 6 месяцев назад

    You are the greatest

  • QUIT.
    QUIT. 6 месяцев назад

    When I adjust the volume on my phone the amplifier beeps, is it the same with yours?

  • Mike Anaya
    Mike Anaya 6 месяцев назад

    Looks like it has some defects, I tried to purchase this yesterday and Amazon send me this:
    Sorry to bother you. We are just told by the supplier that this kind of items has some defects and need to be returned to factory to test again. We are not sure when this process could be done. To protect your benefits and save your time, we would like to refund you first. Do you agree? Sorry for the inconvenience.

  • Jyothish P kumar
    Jyothish P kumar 6 месяцев назад

    man u have a good garden

  • Sergei Comchatka
    Sergei Comchatka 7 месяцев назад

    To be clear this is a 25w per channel amplifier so it may seem it's 50w each speaker (which would be a 100w stereo amp) so it's still a good amplifier it's only 25 per channel just to clarify things still good video

  • William Townsend
    William Townsend 7 месяцев назад

    So I am wanting to make a Bluetooth speaker using the TDA7492 50 W + 50 W dual BTL class-D amplifier and a some automotive 2 way speakers. I also have 7 samsung icr18650-30a batteries that are 3.7v in series that's 25.9v and 19,000mah. So my question is what wall power adapter should I use to power and recharge the system? Also what would be the rough battery run time?

  • Kerry Kennedy
    Kerry Kennedy 7 месяцев назад

    Could I use this amp on a raspberry pi?

  • Timon Martin
    Timon Martin 7 месяцев назад

    Why didn't you do this project with a rechargeable battery, so it can be charged without removing batteries?

  • Woody
    Woody 7 месяцев назад

    I built this to work with high end Sharp speakers with low impedance. I will admit this amplifier can drive just about any set of speakers I own (a wide variety of different watt and impedance levels). But in order to drive the 3 other gain switches, let alone the default max volume, you need a much more reliable and constant power source. I wanted to do this project for sake of affordability, utility, and customization; but alas, I may have to spend quite a bit more money on a better battery system in order to use this to its fullest potential. It was never intended to run off of battery power. Cheapo dollar store AAs will definitely not cut it for this project the result of using such will cause the batteries to actually overheat and eventually swell and release an excess of battery acid everywhere. I'm not claiming that this video is falsely representing the capabilities of this amplifier, but you definitely need to pick an extremely reliable power source that can maintain higher voltages up to 24v and a longer lasting more consistent mAh rating. My battery setup contained a chain of 16 1.5v AA batteries in a 4x4 grid (using two 2x4 housing units).

  • Ante Odak
    Ante Odak 7 месяцев назад

    Is there a possibility to connect the amp to the city grid cause i dont really get the whole battery pack thing

  • Ante Odak
    Ante Odak 7 месяцев назад

    Whats the input voltage neccessary for the chip?