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05 January 2020 Question by: Musaab Ait Brahim
| 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.
30 April 2019 Question by: Rapid Customer
| 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.
11 March 2019 Question by: Rapid Customer
| 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.
02 November 2018 Question by: Rapid Customer
| Product code: 70-0189
Q. If I wanted to use an alternative type of switch, what kind of contact configuration does it require?
17 June 2018 Question by: Rapid Customer
| 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.
08 June 2018 Question by: Rapid Customer
| 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.
04 May 2018 Question by: Rapid Customer
| 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.
13 November 2017 Question by: Rapid Customer
| 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.
21 September 2017 Question by: Rapid Customer
| 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.
20 February 2017 Question by: Rapid Customer
| Product code: 70-0189
Q. Would it be possible to use this speaker kit with a PP3 battery - 9V battery - instead of the 4 AA batteries? (A PP3 battery holder would be purchased separately)
A. Hi IA, thank you for your question. This will work only at low volumes as a PP3 battery does not have the capacity to drive at high volumes. We would suggest a PSU like 85-3080 for best results and please use a heat sink and paste (36-0292 & 87-1130) on the output device or it will run hot and then fail.
09 January 2017 Question by: Rapid Customer
| 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.
15 November 2016 Question by: Rapid Customer
| 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 and paste (36-0292 & 87-1130) on the output device or it will run hot and then fail.
03 October 2016 Question by: Rapid Customer
| 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.
24 August 2016 Question by: Rapid Customer
| 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.
27 July 2016 Question by: Rapid Customer
| 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.
23 May 2016 Question by: Rapid Customer
| 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.
23 May 2016 Question by: Rapid Customer
| 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.
20 February 2016 Question by: Rapid Customer
| 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.
04 February 2016 Question by: Rapid Customer
| 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.
03 December 2015 Question by: Rapid Customer
| 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.
25 September 2015 Question by: Rapid Customer
| 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.
01 January 2015 Question by: Rapid Customer
| 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.
11 June 2014 Question by: Rapid Customer
| 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.
06 April 2014 Question by: Rapid Customer
| 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: Rapid Customer
| 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: Rapid Customer
| 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.
26 November 2013 Question by: Rapid Customer
| 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: Rapid Customer
| 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.
31 May 2013 Question by: Rapid Customer
| 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.
