Noob with questions...

Tristanc1 · 21st September 2006, 04:59 AM

Hi,

I'm in kind of a 'buy it now figure it out later' kind of mood, and I just had a few questions about what i'll need.

I'm pretty much set on one of the chip-amp kits from audio sector, i'm planning on buying 2 to power the mid's and tweeters in an active pair of speakers. Is there anyway to fit 2 kits (4 channels) into one chassis? I know the boards themselves are small, but with the transformers etc will it all fit? The case I have is around 18X16X10. Also is there anyway I can get all four channels to run of of one big transformer or will I need 4 or....This is the part that's confusing me right now, soldered lots but never done anything like this.

I remember taking apart my Aragon 2005 before I sold it, and I'm sure that was a variation on the "gainclone" idea, it just had one massive transformer. But it also sounded like crap...

Basically, to make a long post short, if in my position what would you do? And what would you buy to make it happen?

Tristan

poobah · 21st September 2006, 05:22 AM

You're good to go on the case. Yes you can use one transformer.

I am not sure about the rectifier/power supply boards. At this level of power it make makes more sense to build the PSU discretely (without boards).

Some will argue that you'll have horrible channel separation issues between channels with a single tranny... this is largely BS... and the result of poor supply design.

Gcollier · 21st September 2006, 04:55 PM

One transformer will be perfectly fine. Just make sure you give yourself plenty of capacitance in your supply to keep the dips out when one chip draws a lot of current. You could use one of the rectifier boards supplied with the kit and just add a bank of capacitors after it. Also make sure your transformer will supply the current you are going to need. For your situation where it is a pair of mids and a pair of tweeters you likely won't be drawing a huge amount of power, a 400VA transformer would likely be plenty.

Tristanc1 · 22nd September 2006, 12:27 AM

Thanks for the advice!!

Any other tips for a first-timer?

Tristan

phn · 22nd September 2006, 12:55 AM

I have only one. Take your time and take breaks often. You will do fine.

Tristanc1 · 22nd September 2006, 07:09 PM

Thanks guys!

Parts are on there way, i'll post when i'm all finished.

Tristan

v-bro · 23rd September 2006, 10:17 PM

Maybe this can help you build filters for the lot... for not a lot.....
http://www.google.nl/search?hl=nl&cl...G=Zoeken&meta=

21st September 2006, 04:59 AM	#1
Tristanc1 diyAudio Member Join Date: Jan 2006 Location: edmonton	Noob with questions... Hi, I'm in kind of a 'buy it now figure it out later' kind of mood, and I just had a few questions about what i'll need. I'm pretty much set on one of the chip-amp kits from audio sector, i'm planning on buying 2 to power the mid's and tweeters in an active pair of speakers. Is there anyway to fit 2 kits (4 channels) into one chassis? I know the boards themselves are small, but with the transformers etc will it all fit? The case I have is around 18X16X10. Also is there anyway I can get all four channels to run of of one big transformer or will I need 4 or....This is the part that's confusing me right now, soldered lots but never done anything like this. I remember taking apart my Aragon 2005 before I sold it, and I'm sure that was a variation on the "gainclone" idea, it just had one massive transformer. But it also sounded like crap... Basically, to make a long post short, if in my position what would you do? And what would you buy to make it happen? Tristan

21st September 2006, 04:55 PM	#3
Gcollier diyAudio Member Join Date: Mar 2003 Location: Windsor	One transformer will be perfectly fine. Just make sure you give yourself plenty of capacitance in your supply to keep the dips out when one chip draws a lot of current. You could use one of the rectifier boards supplied with the kit and just add a bank of capacitors after it. Also make sure your transformer will supply the current you are going to need. For your situation where it is a pair of mids and a pair of tweeters you likely won't be drawing a huge amount of power, a 400VA transformer would likely be plenty. __________________ If you take something apart and put it back together again enough times, eventually you will have two of them.

22nd September 2006, 07:09 PM	#6
Tristanc1 diyAudio Member Join Date: Jan 2006 Location: edmonton	Thanks guys! Parts are on there way, i'll post when i'm all finished. Tristan __________________ When I was young I really wanted a bicycle, I used to pray every night for god to bring me one. But as I got older I realized god didn't work that way so I stole one and begged for forgiveness.

23rd September 2006, 10:17 PM	#7
v-bro diyAudio Member Join Date: May 2006	Maybe this can help you build filters for the lot... for not a lot..... http://www.google.nl/search?hl=nl&cl...G=Zoeken&meta= __________________ Max. cone displacement can be several foot on any speaker!Too bad it can be done only once......

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21st September 2006, 05:22 AM	#2
poobah diyAudio Member Join Date: Nov 2005	You're good to go on the case. Yes you can use one transformer. I am not sure about the rectifier/power supply boards. At this level of power it make makes more sense to build the PSU discretely (without boards). Some will argue that you'll have horrible channel separation issues between channels with a single tranny... this is largely BS... and the result of poor supply design.

22nd September 2006, 12:27 AM	#4
Tristanc1 diyAudio Member Join Date: Jan 2006 Location: edmonton	Thanks for the advice!! Any other tips for a first-timer? Tristan

22nd September 2006, 12:55 AM	#5
phn diyAudio Member Join Date: Oct 2004	I have only one. Take your time and take breaks often. You will do fine.

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