Rapid 10W Stereo Amplifier With Speakers

Rapid
MPN
70-0189
Brand
Rapid
Order Code
70-0189
Country of Origin
China
View Full Product Range (2)
Qty Unit Price (Ex VAT)
1+ £17.99
Price per unit {{ this._page.IncVat ? 'Inc' : 'Ex' }} VAT
12 in stock, despatched same dayAdditional quantity lead time 7 days

This stereo audio amplifier kit gives you more power and more volume than our standard kits. Each channel can deliver up to 10W for a louder, crisper sound. The kit is supplied complete with speakers. Supplied with assembly instructions.


  • Kit includes PCB and all components to make one stereo amplifier
  • Supplied complete with speakers (35-1400) which are 80mm in diameter by 50mm high with 8 ohm impedance
  • 10W power per channel
  • Stereo connecting cable supplied 3.5mm male to male
  • Requires 4 x AA batteries (not included)
  • Amplifier dimensions are 50mm width x 75mm length x 30mm height
  • Note: Colour of individual components may vary from those shown
Type Audio amplifier
Soldering Required Yes
Pack Size 1
Power 4 x AA

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Questions

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Question by: Product code: 70-0189

Q. How long is the wire that connects from the stereo amplifier to the input device?

A. Hi Musaab, thank you for your question. The overall length of the wire that connects the stereo amplifier to the input device is 120cm.

Question by: Product code: 70-0189

Q. how long is the wire that is connected to the speaker

A. Hi Hassan, thank you for your question. This stereo amplifier with speaker is supplied with 100cm of 01-0162, so 50cm per speaker.

Question by: Product code: 70-0189

Q. When I have only a mono input can I couple left and right hand inputs together?

A. Hi John, thank you for your question. Yes this is possible, use the supplied 3.5mm lead and connect the stereo end into the amplifier and remove the stereo plug and solder a mono plug on the source end to avoid any shorting of signal at the source.

Question by: Product code: 70-0189

Q. If I wanted to use an alternative type of switch, what kind of contact configuration does it require?

A. Hi Maddy, thank you for your question. Any type of SDPT switch should be fine, please see the datasheet schematic for details (page 4).

Question by: Product code: 70-0189

Q. How could you power this from either a usb or a dc plug?

A. Hi Luke, thank you for your question. This kit can be powered from a USB hub or a DC power supply between 4.5V and 24V, please see the data sheet.

Question by: Product code: 70-0189

Q. Is it compatible with a HC-06 Wireless Bluetooth module?

A. Hi Harvey, thank you for your question. The HC-06 Wireless Bluetooth module appears to only be for data transfer not audio. You would need a Bluetooth receiver with an audio output.

Question by: Product code: 70-0189

Q. Any info on battery life - assuming good brand 4x1.5 AA batteries playing music 75% maximum continuously? Would battery life extend to be more efficient with more batteries?

A. Hi Mike, thank you for your question. You could expect a good 2-4 hours running from a decent quality battery, as this can use 4.5-24V DC input. A much bigger capacity battery could be used giving a much better life.

Question by: Product code: 70-0189

Q. what size are the screwhole sizes?

A. Hi Will, thank you for your question. The fixing holes are approximately 4mm.

Question by: Product code: 70-0189

Q. Can this circuit be powered using a USB lead?

A. Hi Paul, thank you for your question. This should be OK with 5V as it requires between 4.5 and 24V. A USB port can handle a maximum of 500mA so it should be OK.

Question by: Product code: 70-0189

Q. If the batteries were in their adaptor and the circuit was plugged into a mains supply at the same time, would the batteries recharge or would this be dangerous?

A. Hi Jacob, thank you for your question. This kit requires standard AA batteries (not rechargeable) or a suitable PSU but only one source should be connected at any one time.

Question by: Product code: 70-0189

Q. How many amps would it require if I used a 12V DC power supply

A. Hi Sam, thank you for your question. This will depend on the input signal and volume setting a 3 amp or more supply will be fine, please use a heat sink (36-0292) on the output device or it will run hot and then fail.

Question by: Product code: 70-0189

Q. Is it possible to swap out the battery pack for a rechargeable battery circuit with battery or not?

A. Hi Robert, thank you for your question. Yes you can as long as the power supply is between 4.5V DC and a maximum of 24V DC.

Question by: Product code: 70-0189

Q. I have purchased this speaker kit for my GCSE project but am not sure how to solder it. Is there a component diagram for making this speaker as opposed to the circuit diagram in the data sheet?

A. Hi Thomas, thank you for your question. There is a component list in the instructions viewable here.

Question by: Product code: 70-0189

Q. Does this speaker need an ON/OFF switch or is one provided? If not, could you recommend one for me to use with this speaker system?

A. Hi Thomas, thank you for your question. This is a complete amplifier/speaker kit that requires soldering and has a power on/switch provided to solder onto the amplifier PCB.

Question by: Product code: 70-0189

Q. What are the dimensions of everything it comes with?

A. Hi Tiree, thank you for your question. The PCB is 75 x 50 x 30mm, speakers used are 35-1400 78 x 40mm and battery box is 18-0115 which is 58 x 28mm.

Question by: Product code: 70-0189

Q. Does solder need to be applied to both sides of the PCB?

A. Hi Edin, thank you for your question. This only requires soldering on one side of the PCB.

Question by: Product code: 70-0189

Q. Hi I would like to power this in my car using a 12v cigarette socket, apart from the heat sink and paste what adapter would you recommend?

A. Hi Paul, thank you for your question. You would need to make up a lead 2.1 x 5.5mm plug like 20-0905 to fused cigarette lighter plug like 20-3000 using any 2 core cable with a rating of 2 amps or a complete adaptor like 51-6913 if you don't want to make one up.

Question by: Product code: 70-0189

Q. Hello. Can you suggest a Mains to 6v transformer to use with this circuit instead of the battery supply?

A. Hi Aidan, thank you for your question. We would recommend 18-1484.

Question by: 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.

Question by: Product code: 70-0189

Q. What is the length of wire from PCB to speaker? Can I extend the length of the wire connecting speaker and PCB and Battery socket to PCB?

A. Hi A Patel, thank you for your question. The kit is supplied with 100cm of speaker wire so 50cm per channel which can be extended if required.

Question by: 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.

Question by: 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.

Question by: 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.

Question by: 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.

Question by: 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.

Question by: 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.

Question by: 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.

Reviews

Excellent piece of kit

The speakers alone are worth the money, big and solid, large magnet and they pack a punch. The kit is quite straight forward apart from the non electrolytic capacitors. There is one different one, but four that look the same (2 + 2) and I needed the £10 LCD Chinese component checker to find out which was which. Personally if you're going to run more than 6V then buy the heatsink at the same time, so you don't pay extra postage later. Having said that, the 6V battery holder it comes with packs more than a punch and I nearly blew my ears off. I connected it to an earphone matchbox radio I built for the cricket on LW and was it loud, very loud. It's an excellent amp to have for project building. Would I buy another? Yes indeed, worked first time, took a morning to put it together.

Reviewed by: -

Great little kit

This kit is fun and straight forward to assemble. All the instructions are clear within the PDF datasheet. The speakers pack a punch and the magnets are quite strong - worth looking into magnetic shielding if you're going to put this near to anything sensitive. You'll probably want to run it at more than 6V so it would be nice if there was an option to buy the kit with the heatsink you recommended.

Reviewed by: -

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