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Rapid 10W + 10W Stereo Amplifier Kit

<P>Our most powerful audio amplifier kit has 10W per channel, meaning it can drive much larger speakers to give a loud, clear sound. The kit is available with speakers or without if you would prefer to add your own.</P>
  • Kit includes PCB and all components to make one stereo amplifier
  • 10W power per channel
  • Connecting cable supplied
  • Available with or without speakers
  • Requires 4x AA batteries (not included)
  • Empty printed circuit board also available separately
Note: Colour of individual components may vary from those shown.
Order codeMftrs Part No.
70-018810W - No Speakers
70-018910W - With Speakers
70-0195RKAMP4 PCBPCB Only
*Question functionality currently disabled


19 January 2017 Question by: james
Q. What are the physical dimesion for the speakers
A. Hi James, thank you for your question. The speakers measure as follows: 43mm height x 78mm x 78mm.


03 December 2015 Question by: Tom MacMillan | Product code: 70-0189
Q. Hi, One of my students has soldered up a kit, but there is lots interference or buzzing when power is switched on. I cant see any faults with his soldering and there is no problem finding with the build instructions. Do yo have any idea what could be causing it?
A. Hi Tom, thank you for your question. Double check C10 and C11 are 100n and C4 and C5 are 100n as the most common issue as these have been swapped over by mistake causing the amplifier to oscillate and check the 3.5mm input lead hasn't got a broken earth.


22 May 2015 Question by: Derek Pirie
Q. What would be a suitable power supply as an alternative to batteries?
A. Hi Derek, thank you for your question. 90-2641 can be used and would be suitable.


13 May 2015 Question by: Alan Short
Q. Thanks for previous answer regarding this product. 2nd question - do you produce an alternative power supply unit i.e. 240v transformer down to 6v? Considering this as a CGSE project.
A. Hi Alan, thank you for your question. We would recommend 85-2955.


19 March 2015 Question by: Rich
Q. Which DC power unit would you recommend to use if you do not want to use batteries?
A. Hi Rich, thanks for your question. 85-2955 would be a good option to use as a PSU: 85-2955.


07 February 2015 Question by: Freddie
Q. Is there any way I can add another product to make the amplifiers bluetooth wireless?
A. Hi Freddie. Thank you for your question. You could use 49-0663 connected to a jack input to make the speaker bluetooth.


01 January 2015 Question by: C.Rayment | Product code: 70-0189
Q. would this improve quality of TV sound(frlat screen)?
A. Hi C Rayment. Thank you for your question. This kit may improve sound depends on the quality of the original speaker the flat screen TVs tend to have the speaker at the back so often have a muffled sound so plugging this in, may offer a much better sound. The kit does not come pre-built so requires soldering.


01 December 2014 Question by: Richard
Q. Hi, what power units are needed if not using the battery clip?
A. Hi Richard. Thank you for your question. If the battery pack is not being used, any DC power supply can be used as long as it outputs between 4.5 and 24V DC ideally with at least 300mA; this range would be an option.


01 December 2014 Question by: Paul Blackburn
Q. Hi just wondering,does this run off 9v DC power? Also does it come with a BOM list? Thanks
A. Hi Paul. Thank you for your question. The unit will run from battery power between 4.5V DC and up to 24V DC. The full parts list can be found here.


06 November 2014 Question by:
Q. is there a vidio tutorial on how to construct this product for people who are less experienced in electronics
A. Hi, thank you for your question. Unfortunately no video is available to show construction of this unit.


02 November 2014 Question by:
Q. Is there a circuit diagram available for this kit please?
A. Hi, thank you for your question. The data sheet contains the requested circuit diagram.


28 June 2014 Question by: kieran | Product code: 70-0188
Q. Can you connect two kits together?
A. Hi Kieran, thanks for your question. Unfortunately you cannot connect the two kits together.


26 June 2014 Question by: reece
Q. can this product also be mains operated ?
A. Hi Reece, thanks for your question. Yes, you could use the mains to operate this. You could use a 6V DC mains adaptor to supply power, and use the wires that would normally go to the batteries and connect the wires from an adaptor instead.


11 June 2014 Question by: Alex | Product code: 70-0189
Q. What is the depth of the speakers
A. Hi Alex. Thank you for your question. These speakers have a depth of 42mm.


29 April 2014 Question by: victor | Product code: 70-0188
Q. Can you power this via a USB-power supply (5V) ?
A. Hi Victor. Thank you for your question. As USB 2.0 can only deliver around 500mA it will not be ideally suited to power this kit as it may damage the USB device it is plugged into.


10 April 2014 Question by: Tim | Product code: 70-0188
Q. Do you have a recommended enclosure for this unit?
A. Hi Tim. Thank you for your question. There are many different types suitable for the kit, although we do not have recommended enclosure 30-6270 would house the PCB and allow enough room for the external connections excluding your chosen speakers.


06 April 2014 Question by: James | Product code: 70-0189
Q. Do you get 1 or 2 speakers? Can you add your own speakers
A. Hi James. Thank you for your question. This stereo amplifier comes with 2 speakers.


29 January 2014 Question by: Joel | Product code: 70-0189
Q. Hi, What is the outside diameter of the speakers? Thanks, Joel
A. Hi Joel. Thank you for your question. The kit is supplied with the speakers 35-1400 which are approximately 78mm in diameter.


17 January 2014 Question by: john | Product code: 70-0189
Q. does the PCB board come without the components soldered on?
A. Hi John. Thank you for your question. This is an educational kit and as such needs to be assembled with a soldering iron. The kit has the PCB and all the components necessary to build a working amplifier.


16 December 2013 Question by: Tony Fitton
Q. Are the speakers available to purchase on their own.
A. Hi Tony. Thank you for your question. The speakers used in this amplifier kit are available separately (35-1400).


26 November 2013 Question by: Ross | Product code: 70-0189
Q. Trying to decide between kit with speakers and kit without. what is the recommended speaker impedance? What is the frequency response of the supplied speakers and finally could you please provide dimenesions of the speakers supplied with this kit - oh and dimensions for the PCB would also help me work out if I can fit it all in my enclosure! Thanks.
A. Hi Ross. Thank you for your question. The board dimensions are: 50mm width x 75mm length x 30mm height. Speakers are rated at 8 ohm, there is no current information on the frequency response. The speakers are 80mm width with a 50mm height.


07 November 2013 Question by: George | Product code: 70-0189
Q. Does it come with a battery holder for the 4 AA batteries required?
A. Hi George. Thank you for your question. The battery holder is supplied with the kit but not batteries.


04 October 2013 Question by: George Pearse
Q. Does it come with a volume control (potentiometer)?
A. Hi George. Thank you for your question. The volume is adjusted on the mp3 player that you connect. Adjust the volume in the same way as you would normally when wearing earphones. There is no additional volume control potentiometer.


25 September 2013 Question by: Alex Williams
Q. I need a circuit diagram for this circuit as i am using it for a school electronics project.
A. Hi Alex. Thank you for your question. The circuit diagram is in the technical data sheet.


08 September 2013 Question by: George Pearse
Q. Can you attach an ipod lead?
A. Hi George. Thank you for your question. An iPod can be used via the headphones output of the iPod. The cable is included in the kit.


28 August 2013 Question by: Gareth | Product code: 70-0188
Q. What is the lowest impedance speaker that this kit can drive?
A. Hi Gareth. Thank you for your question. The minimum speaker impedance would be 4 ohms per channel.


03 June 2013 Question by: James stamp
Q. i am doing a project at school and what to use thei for it and i need to know the size of the cuircut board and the speaker? Thanks:)
A. Hi James. Thank you for your question. The circuit board is 72 x 48mm. The speakers are mentioned in the Q & A for the module at 78mm diameter.


31 May 2013 Question by: Gareth | Product code: 70-0189
Q. Hi, two questions; 1) In the details it mentions that a heatsink would be needed if powering using more than 6V DC - do you sell these heatsinks? 2) Would it be possible to add a volume control into the circuit? Where would this go ideally? Thanks!
A. Hi Gareth. Thank you for your question. Suitable heat sink would be something like 36-0292 and a suitable heat sink (87-1130) - there is no extra function to control the volume on the PCB board. The volume control is only controlled via the music player that is attached.


17 May 2013 Question by: Martin McHugh
Q. Is there a way of powering the speakers other than the battery option?
A. Hi Martin. Thank you for your question. This is the information regarding running the unit for a power pack:
"When using a regulated DC PSU, 6V to 24V is recommended. When using more than 6V, it is recommended that a heat-sink is fitted to the TDA2009A chip. When the PCB is correctly powered and the switch is on, the green 3mm LED will light up."
Something like a 85-2956 would do the job.


03 May 2013 Question by: Callum | Product code: 70-0188
Q. Does it include the battery holder?
A. Hi Callum. Thank you for your question. A battery holder is included in this stereo amplifier kit.


04 February 2013 Question by: Paul | Product code: 70-0188
Q. Is there a set of instructions for building this kit?
A. Hi Paul. Thank you for your question. Instructions for construction can be found in the data sheet.


30 January 2013 Question by: Lloyd
Q. how big are the speakers?
A. Hi Lloyd. Thank you for your question. The speakers used are 35-1400 which are 78mm in diameter.


29 January 2013 Question by: Liam
Q. if I was to run 2 speakers from this kit what is the maximum watt that each speaker can be in order to get reasonable quality sound
A. Hi Liam. Thank you for your question. The maximum watt that each speaker can be to get reasonable quality sound is 10W.


29 January 2013 Question by: Liam
Q. Would this kit work with two of these speakers, 35-2953
A. Hi Liam. Thank you for your question. They would work with 35-2953 but at 20-30W they are way overpowered. 35-1400 are the ones actually supplied at 10W.


09 January 2013 Question by: Muntasir Uddin
Q. Hi there i was wondering what speakers come with the kit? whats ohms rating are they and watts? cheers Muntasir
A. Hi Mustasir. Thank you for your question. The speakers included in this kit are order code 35-1400 which are 10W 8 Ohm.