Brian May Deacy Amplifier Build Part 3 - Making the Cabinet and Final Assembly

The final part of this three part series on making a replica of Brian May's Deacy amplifier built by John Deacon in the early 1970s covers the design and construction of a replica of the vintage loudspeaker cabinet. I also cover final assembly of the all the component parts. The video has numerous sequences which are listed with time indexes below:

00:00 - Introduction.
00:29 - The physical form of the loudspeaker cabinet.
01:01 - The loudspeaker cabinet front baffle and rear cover.
01:35 - Softwood battens.
01:48 - Computer Aided Design (CAD) work (KAT Deacy).
02:25 - Computer Aided Design (CAD) work (this replica).
03:57 - Chipboard sheet unwrapping and discussion.
04:53 - Planning out the CNC cuts using TurboCAD 2016.
05:23 - Cutting the 1220 x 610 mm chipboard sheet in half.
05:37 - CNC cutting process highlights: softwood battens.
05:58 - CNC cutting process highlights: chipboard cuts.
06:12 - Examining the chipboard panels after CNC cutting.
07:10 - Stainless steel M4 threaded inserts.
07:26 - Corner clamping options.
08:28 - Dry fit clamping test No. 1.
08:49 - The mitre spline rebate routing jig.
10:24 - Veneer introduction.
11:50 - Staining the veneer with Rustins wood dye (light teak colour).
12:57 - Coating the stained veneer with Rustins quick drying varnish (clear matt).
14:26 - Cabinet alignment blocks (DACPABs).
15:10 - Dry fit check using the cabinet panel alignment blocks.
15:44 - Checking mitre fit tolerance, squareness and alignment quality.
16:06 - Band clamp presentation.
16:29 - Reviewing the cabinet after veneering and varnishing.
16:53 - Gluing in the softwood battens.
17:28 - Reviewing the cabinet after installation the softwood battens.
17:43 - Covering the front baffle introduction.
18:19 - Reviewing the covered front baffle.
18:49 - Final assembly - screwing on the front baffle.
19:01 - Installing the ELAC TW4/16 tweeter and ELAC 6RM/186 low frequency driver (woofer).
19:19 - Installing the amplifier printed circuit board (PCB).
19:27 - Reviewing the full installation of all components and PCB anti-vibration mounts.
19:45 - Reviewing the speaker crossover connections.
19:56 - Installing polyester wadding to eliminate low frequency standing waves.
20:07 - Rear cover electrical connections (battery wire terminal posts and 1/4" mono jack socket).
20:21 - Screwing on the rear cover.
20:32 - Attaching the external battery connection lead.
20:39 - Side-by-side comparison with the KAT Deacy amplifier replica.
20:57 - Outro.

Part 1 - Introduction to the Deacy Amplifier
   • Brian May Deacy Amplifier Build Part 1 - I...  

Part 2 - Circuit Board Components Assembly and Discussion
   • Brian May Deacy Amplifier Build Part 2 - C...  

Demonstration
   • Brian May Deacy Amplifier: Legendary Tones  

I extend my gratitude to the following people:
Mark Reynolds for supplying some of the component parts featured in this video and helpful advice.
Nigel Knight for allowing me to review his design survey of Brian May's original Deacy amplifier and general help and guidance.
Gonzalo Plaza for guidance on the cabinet making aspects.

Please check out my other YouTube videos and my website, https://dsgb.net for more information on Brian May's legendary Deacy amplifier, his famous Red Special guitar and my project to build a replica of that.

#BrianMay #Deacy #Deacyamp #JohnDeacon #dsgb #DougShortGuitarBlog