How are you all running multi channel amp boards to a single unit?
This will be my first build and I just want to make something small. Just a woofer or two and maybe a tweeter. Or maybe a 7" and two 3". Or maybe just a single full range in a horn.
It will be just for my bedroom to run the alexa speaker off an aux input (I know, terrible input source but I'm sure anything I make will blow away what the stupid echo dot can do)
Can I just run both outputs to the single set of speakers? Is that what "bridging" is? Can all amps do this or they need to be designed for it?
One more question.... I see playing around with frequencies that for a tower (this question if for another build I have in mind) I would really want 2 mids and one tweeter to match the SPL. Seems like almost all the tweeters run 10-15 DB higher than the mids. Is that why everyone is using 2 mids for each tweeter? Now, how do you run a crossover with two mids and tweeter? Do you just paralell the outputs of the crossover to the mids? Would that halve the amount of power going to each woofer?
Sorry for so many questions right in a row. I am a beginner. Research tends to take me all over the place without getting definite answers to exactly what I am trying to figure out. Porbably because my questions are so elementary.
Thanks for all the responses.
PS: pics attached are of a build style I am going for in the bedroom. The amp board pic is one I am considering buying. The third pic is the specs of the amp board.
This will be my first build and I just want to make something small. Just a woofer or two and maybe a tweeter. Or maybe a 7" and two 3". Or maybe just a single full range in a horn.
It will be just for my bedroom to run the alexa speaker off an aux input (I know, terrible input source but I'm sure anything I make will blow away what the stupid echo dot can do)
Can I just run both outputs to the single set of speakers? Is that what "bridging" is? Can all amps do this or they need to be designed for it?
One more question.... I see playing around with frequencies that for a tower (this question if for another build I have in mind) I would really want 2 mids and one tweeter to match the SPL. Seems like almost all the tweeters run 10-15 DB higher than the mids. Is that why everyone is using 2 mids for each tweeter? Now, how do you run a crossover with two mids and tweeter? Do you just paralell the outputs of the crossover to the mids? Would that halve the amount of power going to each woofer?
Sorry for so many questions right in a row. I am a beginner. Research tends to take me all over the place without getting definite answers to exactly what I am trying to figure out. Porbably because my questions are so elementary.
Thanks for all the responses.
PS: pics attached are of a build style I am going for in the bedroom. The amp board pic is one I am considering buying. The third pic is the specs of the amp board.
Attachments
Only amplifiers designed to parallel output to one speaker (bridging) can do it without damage. PA pro amplifiers have specific bridging instructions. Often in a diagram painted on the top or back.
Tweeters don't have to have 2 mids to balance.. Actually 2 mids parallel only put out 3 db more than one. The tweeter level can be brought down to the mid and bass with a series resistor. If you don't have a measuring mike, you can adjust to taste with an L-pad series the tweeter.
Tweeters don't have to have 2 mids to balance.. Actually 2 mids parallel only put out 3 db more than one. The tweeter level can be brought down to the mid and bass with a series resistor. If you don't have a measuring mike, you can adjust to taste with an L-pad series the tweeter.
What is an L-pad? Could I just use a varistor and tune it that way? If so, what varistor range would I use?
https://www.digikey.com/en/products/detail/visaton-gmbh-co-kg/LC-57/10649516
you want one for the same impedance as the driver you are controlling.
Varistors are adjusted by the voltage you impose on them. I cannot imagine using one inside a speaker.
you want one for the same impedance as the driver you are controlling.
Varistors are adjusted by the voltage you impose on them. I cannot imagine using one inside a speaker.
That is not bridging, and it can damage your amps.
No. It is a technique to give symmetrical radiation around the crossover. Not something you need to get into at the moment, and it has trade offs. For now, simply use resistance to bring the tweeters down.
More often than not, a multi-channel amp running a loudspeaker has to do with bi-amping (low/high) or tri-amping (low/mid/high), rather than bridging or paralleling.
This way, it also becomes easier to bring down the level of a tweeter to match those of the mids / lows, just by adjusting the gain of the tweeter amp. However, the filtering related to the different sections (low/mid/high) of the loudspeaker need to be carried out prior to amplification (active crossover).