6 Channel Homebuilt amp

svsommer · 10th December 2010, 02:55 PM

Hello I’m new here.
I’ll try to build a 6 cannel amp for my HTPC
I think about 80w8ohms per channel.
I need a print chart/component list
So what do you recommend?

BobEllis · 10th December 2010, 03:39 PM

Welcome to the world of DIY audio. You'll likely never go back to commercial products. There are lots of amp options. What is your skill level? Any electronics or metalworking experience? If one of those six channels is for your subwoofer, you might want to consider significantly more power for it.

There are a variety of chip amp kits available from several vendors. Until you bridge LM3886s you won't get to 80W, but you really won't notice the difference between 50 and 80W.

Rod Elliot has some good projects and provides good support. P3A is a nice amp 60-80W Power Amplifier, as is P101 although the output devices are a bit more expensive and harder to source.

Check the group buys section for some other PCB options.

For a less intense building experience, check out Aspen Amplifiers Hugh sells some very nice modules ready to bolt into your enclosure and hook up to your power transformer as well as modules for which you will need to supply a heat sink and power supply.

svsommer · 11th December 2010, 09:13 AM

Hello thanks for the reply
What about?
1 X Apex B500
5 X Apex D14
Have Apex A place for his project?
Sincerely
svsommer

BobEllis · 11th December 2010, 05:34 PM

I don't know that lots of people have built Apex amps like the others I mentioned, but the designs seem sound. Go for it, if you think it will suit. Does he sell boards? Build the smaller amps first and get the hang of it. Larger amps have more potential to make a mess if you've goofed something up.

Bigun · 12th December 2010, 03:45 AM

my 2c: You'll need to give some thought to the power supply if you go with a ClassAB amp - 6 channels at 80W is a fair demand which leads to large transformers and slow-start circuitry for powering it up.

If you want to learn about DIY audio then an HT amp gives you plenty of scope to do that. If you want to get a 6 channel amp up and running as soon as possible and still build it yourself then the chip amp suggestion is an excellent one.

I decided my HT amp would be fully home grown, my own power supply and amplifier design. It took at least a year before it was in service.

SirNickity · 12th December 2010, 04:18 AM

I'm a new guy doing pretty much the same thing, but as a nice office (computer) speaker setup. What have you come up with for doing the master volume control?

svsommer · 12th December 2010, 07:32 AM

Hello Bigum
I say
I'm not a shark in this
I have time for it. I think!
I will not design the pcb. I will use a tested PCB

Hello SirNickity
If I understood your question
I use a Gigabyte GA-MA78GM-S2H
to master

svsommer · 12th December 2010, 07:39 AM

Hello Bigum
I say I'm not a shark in this.
I have time for it I think!!
I will not design the PCB I will use a tested PCB

Hello SirNicKity
If I understood your question
I use a Gigabyte GA-MA78GM-S2H

10th December 2010, 02:55 PM	#1
svsommer diyAudio Member Join Date: Dec 2010	6 Channel Homebuilt amp Hello I’m new here. I’ll try to build a 6 cannel amp for my HTPC I think about 80w8ohms per channel. I need a print chart/component list So what do you recommend?

12th December 2010, 03:45 AM	#5
Bigun diyAudio Member Join Date: Jan 2009 Location: K-W Ontario Blog Entries: 2	my 2c: You'll need to give some thought to the power supply if you go with a ClassAB amp - 6 channels at 80W is a fair demand which leads to large transformers and slow-start circuitry for powering it up. If you want to learn about DIY audio then an HT amp gives you plenty of scope to do that. If you want to get a 6 channel amp up and running as soon as possible and still build it yourself then the chip amp suggestion is an excellent one. I decided my HT amp would be fully home grown, my own power supply and amplifier design. It took at least a year before it was in service. __________________ "The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed." Robert M Pirsig.

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10th December 2010, 03:39 PM	#2
BobEllis diyAudio Member Join Date: Sep 2003 Location: Upstate NY	Welcome to the world of DIY audio. You'll likely never go back to commercial products. There are lots of amp options. What is your skill level? Any electronics or metalworking experience? If one of those six channels is for your subwoofer, you might want to consider significantly more power for it. There are a variety of chip amp kits available from several vendors. Until you bridge LM3886s you won't get to 80W, but you really won't notice the difference between 50 and 80W. Rod Elliot has some good projects and provides good support. P3A is a nice amp 60-80W Power Amplifier, as is P101 although the output devices are a bit more expensive and harder to source. Check the group buys section for some other PCB options. For a less intense building experience, check out Aspen Amplifiers Hugh sells some very nice modules ready to bolt into your enclosure and hook up to your power transformer as well as modules for which you will need to supply a heat sink and power supply.

11th December 2010, 09:13 AM	#3
svsommer diyAudio Member Join Date: Dec 2010	Hello thanks for the reply What about? 1 X Apex B500 5 X Apex D14 Have Apex A place for his project? Sincerely svsommer

11th December 2010, 05:34 PM	#4
BobEllis diyAudio Member Join Date: Sep 2003 Location: Upstate NY	I don't know that lots of people have built Apex amps like the others I mentioned, but the designs seem sound. Go for it, if you think it will suit. Does he sell boards? Build the smaller amps first and get the hang of it. Larger amps have more potential to make a mess if you've goofed something up.

12th December 2010, 04:18 AM	#6
SirNickity diyAudio Member Join Date: Oct 2009 Location: Anchorage, AK	I'm a new guy doing pretty much the same thing, but as a nice office (computer) speaker setup. What have you come up with for doing the master volume control?

12th December 2010, 07:32 AM	#7
svsommer diyAudio Member Join Date: Dec 2010	Hello Bigum I say I'm not a shark in this I have time for it. I think! I will not design the pcb. I will use a tested PCB Hello SirNickity If I understood your question I use a Gigabyte GA-MA78GM-S2H to master

12th December 2010, 07:39 AM	#8
svsommer diyAudio Member Join Date: Dec 2010	Hello Bigum I say I'm not a shark in this. I have time for it I think!! I will not design the PCB I will use a tested PCB Hello SirNicKity If I understood your question I use a Gigabyte GA-MA78GM-S2H

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