Amp for Selenium's 18SW1P

[asnn]

Hello Guys,

So, this is my first post, and considering the number of failed first posts I have seen in this forum I have to admit I am a little nervous. First of all I want to introduce myself, my name is Rodrigo Brunale and I am a Electronic Music Producer from Brazil. I had my first experience with music production 5 years ago in Australia and havent been able to look away since than. Considering i am only 20 years old i am still a lot to learn, not only in the Music world but in everything else in life.

To be honest, I am still a virgin in the DIY world, but I am here to learn and hopefully add to this forum in the future. I have been around, reading and trying to learn as much as i can in my spare time. After a couple of months surfing this and other forums I can finally say this is the right time to ask for help. If i dont understand what you guys are saying i will say so, and ask for further explanation.

I attached to this post a spec sheet for a sub i am building. My initial idea is to build an amp to drive this speaker in a 250 liters box with 2 ducts of 16cm.

[asnn]

I guess i didnt manage to get you attention, but i am sure the information i need is in this forum, i just dont know where to find it.

All i am looking for is a well documented and previous tested amp that can give me around 500 to 800 watt. And before someone say i shouldnt be trying to build an amp like this on my first attempt, i should say that i have no intention on trying to build this by myself. I just think it is easier to find help when i have the plans in my hands.

[ostripper]

Hi rod, welcome to forum..
You might want to try this one...

(Rod elliots project 117)


You better read the whole article and don't allow children
or pets around it...(link below)
http://sound.westhost.com/project117.htm


The amp is a ported , SUPER high power "blameless"
design, very common "schoolbook" topology.. (guaranteed to
work ) with a triple OP stage. One could omit 3-4 pairs
of output trannies and drop the voltages to +- 100v
for a modest 5-600 watts .
My frugal amp can be run at +- 80 volts with 10 output devices
for a good 400 watts as well.
My point is you can take many DIY designs and "port " them for more/less voltage /power with just a few minor changes.
the one above will cost 4-500 US dollars to build and has lethal voltages.
One could refine it to sound better, but as it is, it
will drive (blow) almost any driver out there...
OS

[wg_ski]

Many of the important details have been intentionally left out of that design, to prevent idiots from getting in over their head. The "Dirty Harry" design is a lot more fleshed out and closer to being copyable. If you use 10 pair of outputs on that, it will run on +/-100V safely and give the desired power.

[wg_ski]

And then there's this one (again). Same power as Project 117, but the details have all been worked out and I have 3 in service running off +/-127V. They should run up to +/-140 with no mods. If you strip the upper slave banks and bump up to 7 in parallel, it runs ok on +/-84V with very similar result to the Dirty Harry. I have that one running in the living room (the CS-800 clone).

For some reason the file wouldn't attach the first time. Tried again.

[asnn]

First of all i want to say thanks for all your help!

Project 117 seems under documented for my needs. But fotios's Dirty Harry seems to be a very plausible amp for me to build. I will get in contact with him and try to find out more information about his design.

It might be a better idea for me to build a Class D amp, is there a well tested design around the forum? I dont know if i should open i knew post in the Class D forum or stick to this post. I am even considering ordering a Truepath or an AMP8 from 41hz.