Hey guys. I'm building an 2-band crossover and there is one very simple thing I don't understand: what amplifiers do I use after the signal has been passed through the crossover?
OK, so if this is my system setup:
How do I determine what amplifier I need right before the sub, and before the tweeter?
OK, so if this is my system setup:
An externally hosted image should be here but it was not working when we last tested it.
How do I determine what amplifier I need right before the sub, and before the tweeter?
Hey Francec. Thanks for the quick reply. I know about electronics, but I am brand new to the audio circuits. Here is a MultiSim Schematic I made of the crossover.
http://i586.photobucket.com/albums/ss306/VectorSpace/AudioCrossoverSchematic.jpg
And here is a dB Gain frequency response plot of each output.
http://i586.photobucket.com/albums/ss306/VectorSpace/AudioCrossoverdBFrequencyResponse.jpg
From that info could you help me figure out what the crossover frequency is, which drivers I want and what I do want of the speaker?
These are new concepts to me. Much help needed.
http://i586.photobucket.com/albums/ss306/VectorSpace/AudioCrossoverSchematic.jpg
And here is a dB Gain frequency response plot of each output.
http://i586.photobucket.com/albums/ss306/VectorSpace/AudioCrossoverdBFrequencyResponse.jpg
From that info could you help me figure out what the crossover frequency is, which drivers I want and what I do want of the speaker?
These are new concepts to me. Much help needed.
"How do I determine what amplifier I need"
- base this on a: how loud you want to play; b: how big your room is; c: your budget.
in theory, for headroom, you need the same size amp for HF as LF, in practise you can get away with a somewhat smaller amp for HF.
Of course, you need to decide this and the crossover freq of the crossover unit AFTER you've decided on your speakers.
It's not clear whether you're going for a sub+satelite or 2-way woofer + tweeter system.
typical computer speakers and their amps are a waste of time.
For speakers of reasonable efficiency, 40w is more than adequate
- base this on a: how loud you want to play; b: how big your room is; c: your budget.
in theory, for headroom, you need the same size amp for HF as LF, in practise you can get away with a somewhat smaller amp for HF.
Of course, you need to decide this and the crossover freq of the crossover unit AFTER you've decided on your speakers.
It's not clear whether you're going for a sub+satelite or 2-way woofer + tweeter system.
typical computer speakers and their amps are a waste of time.
For speakers of reasonable efficiency, 40w is more than adequate
Thanks for the input panomaniac. Does everyone else agree with maniac? I would just like to get a second or third opinion before I go and buy anything else!
a pair of chipamps running on ~+-20Vdc would easily do this duty.
A small heatsink will be required, if both drivers, bass/mid and treble are 8ohm impedance. If you can manage with frequencies >=40Hz then small smoothing capacitors>=2200uF (4off for two channels) will do. Select a transformer of about 15Vac-0,15Vac-0V or 18Vac-0,18Vac-0 and about 50VA to 150VA.
A crossover frequency of 1kHz to 3kHz will be appropriate. Drivers could be 5inch to 8inch bass/mid and treble can be a 50mm cone or 20 to 40mm dome, or even a piezo tweeter
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