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Stereo Amplifier

5.05
Exclusive to Kitronik
Teaching Notes
Key Stage 3
The Stereo Audio Amplifier Kit can be used with any Personal Stereo Equipment. Output power: 1W per channel. Supplied with 2 speakers and a pre-made Jack Lead.

Availability: In Stock.

Code1+ 5+ 50+
2136£5.05
(£6.06 incl VAT)
£3.85
(£4.62 incl VAT)
£3.45
(£4.14 incl VAT)
OR

This stereo audio amplifier kit can be used with any personal stereo equipment, including MP3 players.

It uses a NJM2073D audio amplifier IC which can output 1W per channel. The kit is supplied with two speakers and a pre-made 3.5mm jack plug.

It works nicely off a 9V battery (not supplied) or if you want to run it of the mains why not try our 12V wall power unit.

Features:

  • 1W per channel stereo amplifier.

Contents:

Dimensions:

  • PCB Length: 58mm.
  • PCB Width: 35mm.

Requires:

Resources:

This product is also available in retail packaging making theman idealgift. Click here to view the retail version.

Free samples:

Teachers can order a sample of this kit (one per school) here. You will need to select the kit from a list of all the sample kits; the stock code for this kit is 2136.
Note: this service is only offered to schools for evaluation purposes only.

Buy British:

 This kit is designed and manufactured in the UK by Kitronik.

Physical characteristics:

  • PCB Length: 58mm.
  • PCB Width: 35mm.
  • PCB Component Count: 21.

Electrical characteristics:

  • Voltage Nominal: 9V.
  • Voltage Range: 2V - 15V.
  • Standby Current: 7.5mA.
  • Current Max at Nominal Voltage: 180mA.
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Questions:

Page:
  1. 1
  2. 2
Posted by jonathan blackmore, Wednesday, 8 March 2017 on product Stereo Amplifier
  • 0
    vote
    A:

    Hi Jonathan, It depends really on how confident you are at soldering. If you are experienced it should only take around 5-10 minutes. If you are new at soldering it may take slightly longer maybe 20 minutes to get it fully soldered and working.

    Posted by Michael Lockhart on Wednesday, 8 March 2017
Posted by ok, Sunday, 5 February 2017 on product Stereo Amplifier
Posted by ben, Friday, 13 January 2017 on product Stereo Amplifier
Posted by Dillon, Tuesday, 13 December 2016 on product Stereo Amplifier
  • 0
    vote
    A:

    Hi Dillon, You can add a volume control system by using a dual swipe potentiometer and connecting one side to the source input signal, the other side to ground and the middle to the input on the PCB. If you are not sure how to do this or want a neater way of doing it the Deluxe Stereo Amplifier includes a volume knob which saves you this hassle.

    Posted by Michael Lockhart on Tuesday, 13 December 2016
Posted by Maddie, Monday, 12 December 2016 on product Stereo Amplifier
  • 0
    vote
    A:

    Hi Maddie, Again as per my previous answer this amplifier kit hasn't got the circuity built in to allow it to charge either a phone, IPod or MP3 player. Sorry.

    Posted by Michael Lockhart on Monday, 12 December 2016
Posted by dan rogers, Thursday, 30 June 2016 on product Stereo Amplifier
  • 0
    vote
    A:

    Dan,

    An old mobile phone charger with a mini / micro USB connector will output 5V and probably is good for over an amp of power which is far more than the amplifier will use. Other mobile phones are likely to be a similar voltage, but I’d recommend checking the voltage printed on the back of them. It needs to be within the operating voltage of the amplifier circuit which is 2V to 15V. You will need to work out which wire is the 0V and which is the positive using a multimeter and connect them the right way around.

    Please note the higher the voltage you run the amplifier on (up to the limit of 15V) the louder you will be able to turn the volume without it distorting.

     Also if you don’t mind spending a bit more money, we do a better amplifier that comes with an on board micro USB connector that may be compatible with your old phone charger.

    Best regards

    Michael

    Posted by Rob Haywood on Thursday, 30 June 2016
Posted by Harry, Monday, 6 June 2016 on product Stereo Amplifier
  • 0
    vote
    A:

    The amplifier would amplify the signal from the condenser microphone, however it is difficult to say how loud this would be. It would depend a lot of the circuity and the microphone you have.

    Posted by Michael Lockhart on Monday, 6 June 2016
Posted by lesley, Thursday, 3 March 2016 on product Stereo Amplifier
  • 0
    vote
    A:

    There could be a couple of reasons why the sound is distorted and varies in quality at different volumes. It could be a dry joint on the speakers or the cable hasn’t been soldered to the speaker. There are a few possible reason which can be viewed in the fault finding flow chart, found within this link on page 5, https://www.kitronik.co.uk/pdf/2136_stereo_amplifier_essentials_2_0.pdf

    Posted by Michael Lockhart on Thursday, 3 March 2016
Posted by lesley, Tuesday, 23 February 2016 on product Stereo Amplifier
  • 0
    vote
    A:

    Hi Lesley, Yes we would recommend soldering the each component in as you go through the build instruction. This will ensure that you don’t miss any joints as you build the kit.

    Posted by Michael Lockhart on Tuesday, 23 February 2016
Posted by Caroline, Monday, 20 April 2015 on product Stereo Amplifier
  • 0
    vote
    A:

    Hi Caroline, Firstly the IC for version 1 can’t be used in version 2 and vice-versa. For version 1 you need the TBA820M Audio Amplifier IC and for version 2 you need LM386 Pre-amplifier. Fault finding for version one can be found via the pre-built version 1 model which is still on the website, code 2115B, or by following this link https://www.kitronik.co.uk/pdf/2115_mono_amp_essentials_2_1.pdf

    Posted by Michael Lockhart on Monday, 20 April 2015
Posted by Annie Shaw, Tuesday, 18 November 2014 on product Stereo Amplifier
  • 0
    vote
    A:

    This kit is louder than the mono kit with 2 speakers. Adding a second speaker does very little for increasing the volume with the mono amplifier chip as the power output is limited by the chip it uses.

    This kit uses a more powerful chip that is designed to drive two seperate speakers You can add a volume control system by using a dual swipe potentiometer and connecting one side to the source input signal, the other side to ground and the middle to the input on the PCB. If yo are not sure how to do this or want a neater way of doing it the Deluxe Stereo Amplifier includes a volume knob which saves you this hassle. 

    Alternatively if you want a really nice sounding set of speakers with even more power you may want to take a look at the 3W Amplifier, it has a volume knob, a high quality pair of Visaton speakers and can be run from 3xAA batteries or a 5V power supply (you can use an old mobile phone charger and plug it straight into the micro-usb socket on the PCB!).

    Posted by Aaron Sturman on Tuesday, 18 November 2014
Posted by Stephen, Wednesday, 12 November 2014 on product Stereo Amplifier
  • 0
    vote
    A:

    Hi, it is possible but you won't get the best performance out of the kit at that voltage. It should be okay up to a moderate volume but you might experience clipping and distortion at full volume. 

    The more powerful 3W Stereo kit works very well from the 5V that the usb power supply cable provides. It also has a built in micro-usb socket so you can use a USB to Micro USB cable without any soldering if you wish.

    Posted by Aaron Sturman on Wednesday, 12 November 2014
0
vote
1
Answer
Posted by dave, Wednesday, 22 October 2014 on product Stereo Amplifier
  • 0
    vote
    A: It's pretty loud at full volume!
    Posted by Aaron Sturman on Wednesday, 22 October 2014
Posted by Mel, Monday, 13 October 2014 on product Stereo Amplifier
  • 0
    vote
    A: Two enclosures would be fine, if the PCB is going to be in one of the enclosure though it's probably worth deciding which one it will go in before you cut the speaker wire. That way you can cut one short speaker wire and have a longer one for the second enclosure.
    Posted by Aaron Sturman on Monday, 13 October 2014
Posted by Alex Gilbertson, Thursday, 31 July 2014 on product Stereo Amplifier
  • 0
    vote
    A: Hi, the IC is pre-programmed. Just plug it in and it will work.
    Posted by Aaron Sturman on Thursday, 31 July 2014
Posted by geoffrey rothwell, Tuesday, 27 May 2014 on product Stereo Amplifier
  • 0
    vote
    A: Hi, it is possible but you might not need a pre-amp depending on what your signal source is. Can I ask what you are using it for?
    Posted by Aaron Sturman on Tuesday, 27 May 2014
Posted by Chris Mills, Friday, 11 April 2014 on product Stereo Amplifier
  • 0
    vote
    A: We have tried this kit with an iPod and whilst it does work there is no volume control on the iPod or on the amplifier kit so you get the music played at full volume which is inevitable distorted. I suspect that an iPhone will be the same as the iPod, but haven't tried this. It would be possible to use two potentiometers to create a volume (and balance control). The speakers could be changed however the IC on the board will only drive 1W into each speaker so you wouldn't necessarily hear the benefit of using better speakers.
    Posted by Matt Macleod on Friday, 11 April 2014
Posted by Emma Powell, Friday, 11 April 2014 on product Stereo Amplifier
  • 0
    vote
    A: The boombox is available separately. There is a link in the related items on the left of this page. You can also see some pictures of how schools have boxed the mono amplifier using other materials by clicking on the camera icon. We often find that if schools are short on time and want to focus on the electronics then they will use the boombox which can easily be personalised. If more time is available then students will be able to make their own enclosure, in this case it is often useful to have some boomboxes to hand as there will often be the odd student that hasn't managed to finish their case and still will get to take away a finished product.
    Posted by Matt Macleod on Friday, 11 April 2014
Posted by Chris, Friday, 11 April 2014 on product Stereo Amplifier
  • 0
    vote
    A: We have tried this kit with an iPod and whilst it does work there is no volume control on the iPod or on the amplifier kit so you get the music played at full volume which is inevitable distorted. I suspect that an iPhone will be the same (unless it has a 3.5mm jack) as the iPod, but haven't tried this. It would be possible to use two potentiometers to create a volume (and balance control). The speakers could be changed however the IC on the board will only drive 1W into each speaker so you wouldn't necessarily hear the benefit of using better speakers.
    Posted by Matt Macleod on Friday, 11 April 2014
Posted by Simon, Friday, 25 January 2013 on product Stereo Amplifier
  • 0
    vote
    A: We do a deluxe version of the stereo amplifier which includes a volume control, power LED, on/ off switch and optional DC jack plug, for product details see: https://www.kitronik.co.uk/products/project-kits/ic-based-kits/deluxe-stereo-audio-amplifier-kit/
    Posted by Geoff Hampson on Friday, 25 January 2013

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