Well...Not a 100% noob but, might as well be for this. I got to looking at some of the threads here in the "Chip Amps" forum and stumbled across the Gainclone. I like my bi-amped system I use now but would like to gain some more room. The 2 amps I use right now are hooge! An NAD 2100 for tweets and a Kenwood Basic M2A for the midwoofers. I had intended to go with passive crossovers and retain one of the amps but found the Gainclones and saw that I can keep the bi-amp setup in the same space as the NAD2100 (the smaller of the 2 amps). Sooooo....I want to do a 4 channel (2 stereo pairs) Gainclone. I have read speaker load will make a difference in what Gainclone to build. I am gathering from my reading that a LM3886 based kit will work on a nominal 4 ohm load but are there others? This is one place I am looking to get a kit from chipamp.com but was wondering about the kits from audiosector.com as well.
One other question is about the tranny. Again, after doing some research, I think that this one will be fine Parts-Express.com:*Avel Y236651 250VA 18V+18V Toroidal Transformer Also wondering if it would be advisable/possible to run both stereo Gainclones from one tranny? I'm thinking that just a higher VA with dual secondaries would work. Looking at it from a dual mono point of view but with more load.
I'm sure the more I read about Gainclone amps the more I will learn and be able to pose more intelligent questions and may even be able to answer some as well.
Thanks for the help!!!
One other question is about the tranny. Again, after doing some research, I think that this one will be fine Parts-Express.com:*Avel Y236651 250VA 18V+18V Toroidal Transformer Also wondering if it would be advisable/possible to run both stereo Gainclones from one tranny? I'm thinking that just a higher VA with dual secondaries would work. Looking at it from a dual mono point of view but with more load.
I'm sure the more I read about Gainclone amps the more I will learn and be able to pose more intelligent questions and may even be able to answer some as well.
Thanks for the help!!!
Have I done something wrong? Did I post this in the wrong Forum? Just surprised that after 73 views that no one had anything to say. Do I need to rephrase the questions? Do I need to do some more research and ask better questions? Are my NAD and Kenwood amps that I am using now beneath contempt and make me not worthy of an answer? I think I have studied enough to know the answers to my questions but, not having done anything like this before (electronic builds) I'm not sure. Seems kind stupid to reinvent the wheel through trial and error.
Anyone?????
Anyone?????
Hiya TL,
Just read your message and I feel this is a topic I can reply to, as I have just completed my 4 channel GC, set up for bi-amping.
Background info - Australian mains supply is 230-240V. The steel case is earthed. The amps and CO are grounded via the 0V of the transformer.
The amp is based on the K5130 kit from Altronics, Australia. This is a stereo amp which comes with it's own powersupply on the pc board, of course, I used two of them. The powersupply includes 2 x 4700mF caps per board, and a 15-0-15V supply for preamp and etc, and in my case, to supply the active crossover, which is an Elliot Sound Products, P09B. I set the CO point to 3100Htz to power my (little) arrays, 6 x 5" woofers and 4 x Vifa 1" tweeters per box.
The chip sets are LM3886. Full power (50w per channel) can be achieved using a 35-0-35V tranny - into 8ohms. My set up nominal impedence is 6ohm. So to avoid stressing the amp or running into clipping, I went for a 300VA torroidal @ 18-0-18V, though would have preferred a 25V peak.
The woofers and tweeters volume are controlled via 50k pots. I would have liked a master volume control, but for now, the individual channel adjustment is just fine.
Of note is the absolute absence of turn on/turn off thump when applying power. Quiet, but there is a subdued (i.e very faint) mains hum. I'll have to go back and recheck my wiring. I may also try using the ESP power supply, the P05b, which I have found is very quiet on my 3 way active crossover.
I will try and upload pics and more data later, but the Space Shuttle is about to land, so it's off to NASA TV.
Cheers
Gaz.
Just read your message and I feel this is a topic I can reply to, as I have just completed my 4 channel GC, set up for bi-amping.
Background info - Australian mains supply is 230-240V. The steel case is earthed. The amps and CO are grounded via the 0V of the transformer.
The amp is based on the K5130 kit from Altronics, Australia. This is a stereo amp which comes with it's own powersupply on the pc board, of course, I used two of them. The powersupply includes 2 x 4700mF caps per board, and a 15-0-15V supply for preamp and etc, and in my case, to supply the active crossover, which is an Elliot Sound Products, P09B. I set the CO point to 3100Htz to power my (little) arrays, 6 x 5" woofers and 4 x Vifa 1" tweeters per box.
The chip sets are LM3886. Full power (50w per channel) can be achieved using a 35-0-35V tranny - into 8ohms. My set up nominal impedence is 6ohm. So to avoid stressing the amp or running into clipping, I went for a 300VA torroidal @ 18-0-18V, though would have preferred a 25V peak.
The woofers and tweeters volume are controlled via 50k pots. I would have liked a master volume control, but for now, the individual channel adjustment is just fine.
Of note is the absolute absence of turn on/turn off thump when applying power. Quiet, but there is a subdued (i.e very faint) mains hum. I'll have to go back and recheck my wiring. I may also try using the ESP power supply, the P05b, which I have found is very quiet on my 3 way active crossover.
I will try and upload pics and more data later, but the Space Shuttle is about to land, so it's off to NASA TV.
Cheers
Gaz.
Oh, and here's a link to my homepage which I've quickly slapped together. It contains links to sites where I purchased the amps and crossover.
Always a work in progress, I will upload some more pics and data once I've consolidated the project.
2-Way Crossover Chip Amp Construction
Oh, maybe you'll have to copy and paste the link into your address bar. There should be no pop ups or any crap.
Cheers
Gaz.
Always a work in progress, I will upload some more pics and data once I've consolidated the project.
2-Way Crossover Chip Amp Construction
Oh, maybe you'll have to copy and paste the link into your address bar. There should be no pop ups or any crap.
Cheers
Gaz.
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