Hi everyone,
Just joined and been thinking of building a wireless speaker for the garden. Started off simple but now I'm just lost so wondered if someone could help.
I will build myself a bespoke box to house the 2 6x9 4ohm speakers ( laying around from an old car of mine). The box will be a bit of a chore to build but its the electronics side that is causing me a headache so Ill try and keep it simple.
I was looking to use the KKmoon TDA7492 Wireless Bluetooth 4.0 2*50W 2-channel Audio Receiver Stereo Digital Power Amplifier Board Module
Specs here -https://www.amazon.co.uk/gp/product/B019ZAP25S/ref=ox_sc_act_title_5?ie=UTF8&psc=1&smid=A1XTJ6FZJZ40TR
and to power it a XTPower® XT-16000QC2 Power Bank - modern DC / USB QC2 battery with 15600mAh
Specs here - https://www.amazon.co.uk/gp/product...act_title_4?ie=UTF8&psc=1&smid=A1ZK71SG13GHLQ
Now this may seem unusual perhaps, but I don't like Bluetooth so will use a Chromecast audio, the power supply allows me to use 12v dc ( other voltages are available from the power bank) but also power the Chromecast via a USB socket supplying the 1 amp it needs.
The questions are, is the battery ok? Can anyone work out roughly how long it would last ( I know this would depend on volume etc but a rough estimate would be fine ) and last would anyone (bearing in mind that I need to power the chromecast audio as well ) make any changes like the amp or the battery?
I chose this amp as I'm hoping its powerful enough for a half decent volume ( I'm not looking to stage a concert 🙂 ) and half decent battery life ( I'm hoping for 6 hours minimum )
The 6x9 if the information is needed are kenwood fc hq690 4ohms rated at 150-200watts, I think and I can not confirm this as even the paperwork for the speakers don't say, but I think its rated at 50w nominal input but I could be wrong
Any advice would be very welcome!
Thank you and hope to share my findings and work with you all 🙂
Just joined and been thinking of building a wireless speaker for the garden. Started off simple but now I'm just lost so wondered if someone could help.
I will build myself a bespoke box to house the 2 6x9 4ohm speakers ( laying around from an old car of mine). The box will be a bit of a chore to build but its the electronics side that is causing me a headache so Ill try and keep it simple.
I was looking to use the KKmoon TDA7492 Wireless Bluetooth 4.0 2*50W 2-channel Audio Receiver Stereo Digital Power Amplifier Board Module
Specs here -https://www.amazon.co.uk/gp/product/B019ZAP25S/ref=ox_sc_act_title_5?ie=UTF8&psc=1&smid=A1XTJ6FZJZ40TR
and to power it a XTPower® XT-16000QC2 Power Bank - modern DC / USB QC2 battery with 15600mAh
Specs here - https://www.amazon.co.uk/gp/product...act_title_4?ie=UTF8&psc=1&smid=A1ZK71SG13GHLQ
Now this may seem unusual perhaps, but I don't like Bluetooth so will use a Chromecast audio, the power supply allows me to use 12v dc ( other voltages are available from the power bank) but also power the Chromecast via a USB socket supplying the 1 amp it needs.
The questions are, is the battery ok? Can anyone work out roughly how long it would last ( I know this would depend on volume etc but a rough estimate would be fine ) and last would anyone (bearing in mind that I need to power the chromecast audio as well ) make any changes like the amp or the battery?
I chose this amp as I'm hoping its powerful enough for a half decent volume ( I'm not looking to stage a concert 🙂 ) and half decent battery life ( I'm hoping for 6 hours minimum )
The 6x9 if the information is needed are kenwood fc hq690 4ohms rated at 150-200watts, I think and I can not confirm this as even the paperwork for the speakers don't say, but I think its rated at 50w nominal input but I could be wrong
Any advice would be very welcome!
Thank you and hope to share my findings and work with you all 🙂
The Powerbank looks Ok, but is very expensive for its capacity.
Using powerbanks is possible, but can be a bit tricky sometimes, as they have a few annoying (safety) features.
Best thing to do is using these(4 in series):
NCR18650B 3.7V 3400mAh 18650 Protected Li - ion Battery Rechargeable ( 4 PCS )-16.59 Online Shopping| GearBest.com
But you need a special charger or integrated charging circuit.
Your speakers have a good sensitivity, I would guess around 20h play time at bbq party volume level(~3W average) WITHOUT the chromecast. Including the chromecast(1.8W): maybe 13h.
Using powerbanks is possible, but can be a bit tricky sometimes, as they have a few annoying (safety) features.
Best thing to do is using these(4 in series):
NCR18650B 3.7V 3400mAh 18650 Protected Li - ion Battery Rechargeable ( 4 PCS )-16.59 Online Shopping| GearBest.com
But you need a special charger or integrated charging circuit.
Your speakers have a good sensitivity, I would guess around 20h play time at bbq party volume level(~3W average) WITHOUT the chromecast. Including the chromecast(1.8W): maybe 13h.
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I don't see the point in buying a Bluetooth board to simply ignore the Bluetooth functions.
You'd be better off with a simple stereo amp.
I just spotted this one HERE
Now I can't see what is in the box from that ad but a whole amp-in-a-box for that money seems a good deal. You'd have to find or make a power supply cable to the 5.5x2.1 power connector.
The very cheapest on eBay are under £4 for a TPA3116D2 amp. But.... They seem to be a bit bare. My dual chip board cost say £8 a little while ago but came with brass standoffs assembled and a JST XH 3 pin cable to provide audio input.
My advice would be to look around at what is included in the price.
Also, also..... Unless your power supply or powerbank is very trick you will get a ground loop passing all manner of pops, fart and digital squirrels through the speakers. Budget for a ground loop isolator for the audio input cable from the CCA to the amp.
I got THIS ONE
You'd be better off with a simple stereo amp.
I just spotted this one HERE
Now I can't see what is in the box from that ad but a whole amp-in-a-box for that money seems a good deal. You'd have to find or make a power supply cable to the 5.5x2.1 power connector.
The very cheapest on eBay are under £4 for a TPA3116D2 amp. But.... They seem to be a bit bare. My dual chip board cost say £8 a little while ago but came with brass standoffs assembled and a JST XH 3 pin cable to provide audio input.
My advice would be to look around at what is included in the price.
Also, also..... Unless your power supply or powerbank is very trick you will get a ground loop passing all manner of pops, fart and digital squirrels through the speakers. Budget for a ground loop isolator for the audio input cable from the CCA to the amp.
I got THIS ONE
Hey guys,
Thanks for your responses!
Jerms, The Bluetooth point is something that I have thought about, it the event that I use the speaker somewhere else the Bluetooth option is handy ( music at home is streamed from my NAS). I have looked at the amp and similar you mention and seem fine for what I need, the only thing is as the amp will be mounted within the speaker housing the push buttons seem a better option for me than the rotary nob, and the audio input would inhibit how close to the speaker housing I could place it as the audio input again will be connected internally, but the are some options like yours that have the input on the rear. I have read that most people seem to think that the TPA3116 has a better sound but either would be fine.
I do not really understand what you mean about the ground loop, I presume you mean some sort of noise through the speakers when volume is low (humming/buzzing etc?) If so thanks I will get one of those isolaters as well Cheers!
Jim Beam, You areright, the powerbar is expensive for its capacity, I presume this is because it can supply at 12, 16, 19 , 21 and 24v via a DC output ( laptop style connector) which many don't, this also has 2 USB outputs that supply up to 2.1 or 2.4amps ( chromecast needs 1amp) and they both work at the same time. Again I did look at all types of batteries including the nes you mention, as you say I would have to add a balance circuit etc and I would have to somehow get a DC and usb power from them, something that adds extra time and would have to research about that as well. Also could double up as an actual power bank while I'm on holiday etc. If ou think I could get 13hours then that's excellent, I was oping I could get 10 so I'm more than happy with 13. Thankyou very much 🙂
All I got to do now is start designing the speaker Ill pop some photos or might do a youtube video, will be a while though.##Thanks
Thanks for your responses!
Jerms, The Bluetooth point is something that I have thought about, it the event that I use the speaker somewhere else the Bluetooth option is handy ( music at home is streamed from my NAS). I have looked at the amp and similar you mention and seem fine for what I need, the only thing is as the amp will be mounted within the speaker housing the push buttons seem a better option for me than the rotary nob, and the audio input would inhibit how close to the speaker housing I could place it as the audio input again will be connected internally, but the are some options like yours that have the input on the rear. I have read that most people seem to think that the TPA3116 has a better sound but either would be fine.
I do not really understand what you mean about the ground loop, I presume you mean some sort of noise through the speakers when volume is low (humming/buzzing etc?) If so thanks I will get one of those isolaters as well Cheers!
Jim Beam, You areright, the powerbar is expensive for its capacity, I presume this is because it can supply at 12, 16, 19 , 21 and 24v via a DC output ( laptop style connector) which many don't, this also has 2 USB outputs that supply up to 2.1 or 2.4amps ( chromecast needs 1amp) and they both work at the same time. Again I did look at all types of batteries including the nes you mention, as you say I would have to add a balance circuit etc and I would have to somehow get a DC and usb power from them, something that adds extra time and would have to research about that as well. Also could double up as an actual power bank while I'm on holiday etc. If ou think I could get 13hours then that's excellent, I was oping I could get 10 so I'm more than happy with 13. Thankyou very much 🙂
All I got to do now is start designing the speaker Ill pop some photos or might do a youtube video, will be a while though.##Thanks
The 18650 I posted are "protected" ones, they have a built in protection circuit and can be used like normal batteries. No need for a balancer or other stuff, just take them out of the holder an put them in a standard 18650 charger.
Anyway, why don't you just use power extension cords, you have wifi there but no wall socket?
Anyway, why don't you just use power extension cords, you have wifi there but no wall socket?
Hi Jim,
This is my first project to involve electrics so my knowledge is lacking, yes there is a power socket outside so yes this would make it easier, the idea to make it portable was just a benefit in case I took it somewhere although that would be seldom. I still don't understand if I made it mains, or use the batteries and holder you mention how I would give the amp 12-16v (I've read nit to give more than 16v on 4ohm speakers - I'll probably want to give the amp 16v) and give the 1amp and 5v the Chromecast needs.
I'm open to suggestions, making it mains would probably save a bit of cash.
Thanks again
This is my first project to involve electrics so my knowledge is lacking, yes there is a power socket outside so yes this would make it easier, the idea to make it portable was just a benefit in case I took it somewhere although that would be seldom. I still don't understand if I made it mains, or use the batteries and holder you mention how I would give the amp 12-16v (I've read nit to give more than 16v on 4ohm speakers - I'll probably want to give the amp 16v) and give the 1amp and 5v the Chromecast needs.
I'm open to suggestions, making it mains would probably save a bit of cash.
Thanks again
You might should use a tpa3116 amp instead of the TDA7492, the tpa3116 can handle 4 ohm speaker up to 26V->70W/Channel instead of 30W/Channel.
But I don't think you really need all that power.
You can get 16V from 4 18650 connected in series or a notebook power supply and 5V from a simple Phone Charger, a cheap powerbank or a buck converter(20V->5V, 2$).
But I don't think you really need all that power.
You can get 16V from 4 18650 connected in series or a notebook power supply and 5V from a simple Phone Charger, a cheap powerbank or a buck converter(20V->5V, 2$).
Hi Jim, I like that idea, I think I will look at 3116d2 and a cheap power bank for the Chromecast, this will be less than half the price of the power bank I was looking at, and it doesn't really matter if it's not portable. I'll have a look. Thank you 🙂
One, there's a "GUEST" mode on the CCA. If you set a PIN number, you can cast to it from any wireless capable device. Provided you have the Chromecast app too. To make sure it's configured properly.
Check this out, would be ideal
Sure Electronics' webstore 2 x 50 Watt 4 Ohm Class D Audio Amplifier with Bluetooth 4.0 APT-X - JAB2-50
Sure Electronics' webstore 2 x 50 Watt 4 Ohm Class D Audio Amplifier with Bluetooth 4.0 APT-X - JAB2-50
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