Building a 10 Channel Amplifier - Assembly Details Part 1

The back panel for the amp is made from 1/8" thick aluminum and I engraved the labels in it with my CNC using a V groove bit. The engraving was then filled with black paint and I sanded off the excess after that dried. That method works great if the font is big enough.
You might keenly observe that I added more labels to the back plate - I forgot to mark the outputs for the individual speaker drivers (woofer, tweeter, etc.) the first time.
The case I'm working with is one I partly build 15 years ago and I show that in this video:
   • Designing and Building a 10 Channel A...  
The rest of the video concentrates on getting the power supply parts prepped and installed. There are four power distribution boards that sit at the bottom of the heatsinks on the sides that feed the power amp boards that mount on the heatsinks directly above. This keeps the wiring somewhat tidy and the leads short.
The two dividers that run down the middle of the case partition off the centre area where the transformers are. These dividers add a lot of structural stiffness to the bottom panel and also provide space on top to mount the power supply PCBs.

It's worth pointing out for anyone who hasn't done this kind of thing that this 10 minute video represents hours and hours of work. None of this is as easy or fast as I'm making it look, and even a small thing like not being able to remember where I put a particular part than needs to go in next sets you back orders of magnitude longer than this video.
A lot of planning and off camera work went into this, on top of the work I did 15 years ago to build the case to begin with. If you are thinking of this as a way to save money instead of buying a ready made unit, you are missing the point entirely. For me designing and building this amp is entertainment of the challenging sort. Much like training, preparing and gearing up to climb mountains is for someone else, or rebuilding a project car from the ground up. Sure I'll have an awesome piece of hand-built equipment after I'm done, but it's the experience of doing it that I value the most.

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