I'm a beginner so please be kind and straightforward.
Building a Bluetooth Speaker from a kit but only using one Woofer and Tweeter.
The kit is a C-Note bookshelf speaker (stereo) and the Amp is a Dayton Audio KAB250v3. So the amp has 2 sets of speaker leads, but I will only be using one tweeter and woofer. I have built the crossovers, but want to know how to wire the speaker from the Amp without causing any amp damage. Should I just pair the -ves together and do the same with the +ves or do I need to build a stereo/mono converter? thanks! Tom
Building a Bluetooth Speaker from a kit but only using one Woofer and Tweeter.
The kit is a C-Note bookshelf speaker (stereo) and the Amp is a Dayton Audio KAB250v3. So the amp has 2 sets of speaker leads, but I will only be using one tweeter and woofer. I have built the crossovers, but want to know how to wire the speaker from the Amp without causing any amp damage. Should I just pair the -ves together and do the same with the +ves or do I need to build a stereo/mono converter? thanks! Tom
It is probably better to leave the other amplifier channel unused. I realise this seems like a waste. Another option would be to use one for the tweeter and one for the woofer, but there is questionable benefit.
Your stereo to mono would have to go before the amp.
There are ways to get more out of the amp by combining two channels into one but they are small and a little complicated. If you connect the two positives together, expect to damage the amp.
Your stereo to mono would have to go before the amp.
There are ways to get more out of the amp by combining two channels into one but they are small and a little complicated. If you connect the two positives together, expect to damage the amp.
I thought the TPA3116 had to have a speaker load on both outputs so best to wire 1 channel to the tweeter via it's HP xo and the other to the woofer via it's LP xo.
You'd have to mix the stereo to mono on the input but that wouldn't work for the on board Bluetooth which would be stereo which means the sound to the tweeter and woofer would be coming from opposite channels. I wouldn't think you could mix the Bluetooth signal to mono on board.
If you can, best to use both sets of drivers to obtain stereo.
You'd have to mix the stereo to mono on the input but that wouldn't work for the on board Bluetooth which would be stereo which means the sound to the tweeter and woofer would be coming from opposite channels. I wouldn't think you could mix the Bluetooth signal to mono on board.
If you can, best to use both sets of drivers to obtain stereo.
Thanks AllenB. If I only use one stereo channel, which is the easiest and safest route, I guess the downside is I'll only have listening access to that one side of the stereo mix.
thanks rabbitz, detailed and helpful. Would the bluetooth signal leave the amp as stereo and then be converted to mono? and; you mention 'best to use both sets of drivers to obtain stereo'...do you mean, use both sets of speakers and crossovers? The thing/reason is i've set my heart of using a 1930s art deco speaker enclosure with only roof for 1 tweeter and woofer plus the electronics.
The Bluetooth would be stereo, i.e. left and right channel. The only way to get mono out of it is to have mono from the source. There's no way I know to get mono from the stereo power amp output.
Of course you could find the Bluetooth output on the module and cut and shut to add mixing at line level but very risky as it's all SMD components.
For analogue in it's easy and only requires two 10K resistor with one on each channel input and then joined after the resistor. You do lose 6 dB so may need a gain stage after it. See these resistors at point A to 5 on the attached circuit.
I only mentioned using both sets of speaker drivers and crossovers as stereo all the way through simplifies things but I see where you are coming from. A lot of builders use small full range drivers in this style of speaker so you can get a small enclosure and stereo sound. There's a few builds like this in the full range forum but AFAICR they are stereo.
Maybe someone in the Class D forum could help as I know no way to get a mono mix at speaker level.
Of course you could find the Bluetooth output on the module and cut and shut to add mixing at line level but very risky as it's all SMD components.
For analogue in it's easy and only requires two 10K resistor with one on each channel input and then joined after the resistor. You do lose 6 dB so may need a gain stage after it. See these resistors at point A to 5 on the attached circuit.
I only mentioned using both sets of speaker drivers and crossovers as stereo all the way through simplifies things but I see where you are coming from. A lot of builders use small full range drivers in this style of speaker so you can get a small enclosure and stereo sound. There's a few builds like this in the full range forum but AFAICR they are stereo.
Maybe someone in the Class D forum could help as I know no way to get a mono mix at speaker level.
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It isn't clear about the Dayton unit going through an analogue stage before the power stage, but Bluetooth is not an audio standard, but a data transfer protocol so maybe.
That would be best of course but there are a few options. Switching the source to mono would function well. Connecting the power amp outputs in parallel through the use of a small value mixing resistor can also work.
That would be best of course but there are a few options. Switching the source to mono would function well. Connecting the power amp outputs in parallel through the use of a small value mixing resistor can also work.
thanks. the mixing resistor sounds like it's worth a try? I don't want to do anything to the amp pcb..I just don't trust myself...