Hi all,
I'm looking for a standard reference amplifier, perhaps someone could help by pointing me in the right direction. I need:
- 100W in 8R
- Better than 0.05% THD 1W 1kHz
- Well documented
- Easy to find parts, preferably a BJT output
- Reasonably simple
In all honesty I can't believe I can't find this on perhaps the worlds largest DIY audio forum. I appreciate people posting their designs however posting a sketch of the circuit and just an image for toner transfer really makes it pointless. Revision numbers, gerbers, documentation on performance, proper schematics and a repository are really needed for a complete project. I think this could really help the project and thus the community by building trackable IP.
Take a look at github for a functional community. It can be done, there are some phenomenal projects done to very high standards.
Thanks!
I'm looking for a standard reference amplifier, perhaps someone could help by pointing me in the right direction. I need:
- 100W in 8R
- Better than 0.05% THD 1W 1kHz
- Well documented
- Easy to find parts, preferably a BJT output
- Reasonably simple
In all honesty I can't believe I can't find this on perhaps the worlds largest DIY audio forum. I appreciate people posting their designs however posting a sketch of the circuit and just an image for toner transfer really makes it pointless. Revision numbers, gerbers, documentation on performance, proper schematics and a repository are really needed for a complete project. I think this could really help the project and thus the community by building trackable IP.
Take a look at github for a functional community. It can be done, there are some phenomenal projects done to very high standards.
Thanks!
check out this threads:
The best audio amplifier books - Overview (Google books)
Bob Cordell's Power amplifier book
The best audio amplifier books - Overview (Google books)
Bob Cordell's Power amplifier book
Search for APEX AX14 or FH11 or FH9 all highly documented easy to find parts and will give you 100W at 8r (or more). Even have her era to have boards made for $5, doesn’t get any easier.
There's over 11,000 posts in this thread. Are there any mods? If so what are they? Where's the latest revision? Where's the documentation? Where's the performance results? Who took them? Under what conditions? What are the limitations of the design?
Looks good, I'll do some reading there. Never have understood the reason for high bandwidth in audio amplifiers though.
You must the fastest google user in history - search Directory of APEX and you can find everything you need.
But I will spoon feed you again!
I have the early version...a very very good amp! [I am referring to Bonsai's NX amp....some may be around for sale as a few will update to his latest creation]
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I'm thinking everyone has a limited amount of time available.
So you are not only asking them to design and build an amplifier but provide full documentation and testing reports and more. It seems like a lot of time demands to put on others for a hobby they do in their spare time.
I clearly don't have the time for part of this but I can't believe someone else doesn't spend the time to do this in elaborate detail for me.
This is a very good point. My point was more about benefitting the community by making more efficient use of some fabulous designs here. It would make more sense for one person to go to the effort rather than every person who builds the amplifier. I plan on providing as much info about the projects I undertake as I can to help others.
SlewMaster by Ostripper- several IPS with different topology. Easy to change at any time to find Your own sound (Kypton-ND is my favorite one). Also there are .lay and gerber files in SlewMaster thread, so You can easily get PCBs from China or make Your own.Tons of info... Fantastic project! From Apex - A14 is my favorite amp with nice sound, I like it more than A40 (of course I built both)...
There are a number of fine amplifiers out there to choose from. It is difficult to choose which one to build.
In Bob Cordell's new book, he has a chapter devoted to the design of a power amplifier that meets your stated requirements. I have done up the circuit boards for that design.
With Bob's permission, blessings & after the book is released, I can offer the design for sale as in, the pcb's, full set of doc's, a link to a Mouser shopping cart to buy the parts. The bigger challenge is the mechanical design.
I also did up Bob's DH-220C Hafler re-design this winter. You can use that with your own lateral fets (as I did) if you do not have a Hafler chassis. It is more expensive due to the fet premiums.
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I can 'second' astx's recommendation....I have one of these amps and am very pleased with it. Am at present converting the in and out terminals to Speakon and XLR.
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