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Chip Amps Amplifiers based on integrated circuits

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Old 12th June 2005, 03:28 PM   #1
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I have spent an hour or so going through posts and i cant seem to get a handle on size and such. So here is a straight question.

Is it possible to have chip amps 'inside' sealed enclosures to make active speakers or do they have to be exposed somewhere.
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Old 12th June 2005, 03:32 PM   #2
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Sure, the amp itself can be inside a sealed enclosure, but you will want to make sure you have adequate heatsinking. One good way to do this is to make the heatsink itegral with your design is a way that the fins are exposed to the outside air.
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Old 12th June 2005, 04:21 PM   #3
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I can make cutsto fit it. the enclosures are already made. I am trying to get back money from my initial exburant spending spree. I have read all over this forum that chip amps are as good as any store bought SS amps available until you get into the big buck stuff. SO if i can pawn off some stuff for cash back so i can DEQX then that would be fantastic.

I want to go active on all the speakers, that way all i need outside is a pre amp and crossover, which i seem to already have

top part is morel MW166 with a Hi-Vi ribbon RT8II and then there is a middle 8 inch for mid bass in its own enclosure. and the bottoms are a pair of enclosures containing 2 D10.8 10 inch subs each. Which i will obviously have to plate amp. But will the chip amps produce enough juice for the mid bass ? I know it will be enough for midrange and tweeter.
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Old 12th June 2005, 05:52 PM   #4
cowanrg is offline cowanrg  United States
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i had at one time thought of making a small box that would house the amp and power supply. this box would attach to the back of a speaker, over the speaker terminals, thus not altering the volume of the speaker, and allowing it to be free to "breathe".

if you had an enclosure that was slim enough, it wouldnt change the overall depth of the speaker much at all.

or, if you wanna be super cool, build speaker stands with amps built in. a power cord comes out the bottom and little pig-tail leads come out at the top and connect to the speaker. you would have plenty of real estate to build whatever inside the stand, not to mention sufficient cooling.
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Old 12th June 2005, 09:49 PM   #5
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Unfortunately i wont have stands. Although that sounds like a great idea. I have three enclosures that stack. That way if something is off or badly built i only have to do a new design for that enclosure. Strictly modular baby. Bass Mid-bass Mid-High.
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Old 12th June 2005, 10:01 PM   #6
Mr Evil is offline Mr Evil  United Kingdom
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Amps inside the enclosure are ideal, since you can then use extremely short wires to the speakers, effectively eliminating any effects they may have.
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Old 12th June 2005, 10:30 PM   #7
G4ME is offline G4ME  United States
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Just as long as you have decent signal wires, personally I would go with speaker wire instead of expensive long runs of RCAs
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Old 12th June 2005, 11:13 PM   #8
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Quote:
Originally posted by Mr Evil
Amps inside the enclosure are ideal, since you can then use extremely short wires to the speakers, effectively eliminating any effects they may have.
Right.
And you can even avoid speaker terminals, which are a bunch of unuseless metal.
The amp can be on an isolated compartment, located on the bottom of the speaker.
The wiring is internal, soldered on the amp and on the drive units.

Quote:
Originally posted by G4ME
Just as long as you have decent signal wires, personally I would go with speaker wire instead of expensive long runs of RCAs
As long as you have a low output impedance preamp, you don't need expensive interconnects.
No, let me put it this way: you don't need expensive interconnects.
It is much better to have as short as possible speaker cables.
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Old 13th June 2005, 01:30 AM   #9
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You guys are forgetting about heat ?

I wont be using 5 watt amps guys. the top amp for the mid highs is at least 25 watts the mid bass surely has to be more then that for any reasonable amount of output and 'oooomph' and the plate amps are like 350 for the subs.

higher frequencies require less power i know but still, 5 watts wont really do it for me. SO attaching them to the speaker itslef in a sealed enclosure just dosent seem practical to dumb old me .
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Old 13th June 2005, 01:40 AM   #10
Mr Evil is offline Mr Evil  United Kingdom
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It's quite practical to use a heatsink as part of or even all of one side of the box. Or, as has been mentioned already, put all the electronics in a self-contained enclosure attached to the speaker enclosure.
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