Uploaded October 2025 | Updated September 2026, 18 hours ago

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In this video we convert an early 50s Hammond HR-40 Tone Cabinet Church Organ Amp into an Alnico 4x10 Bassman Piggyback Cab. I will show the entire pine cabinet construction including hand cutting finger joints without any jig or special tools. Then we will mic it up in a stereo configuration powered by a Fender Reverb combo to head conversion to display the heavenly tones.

0:00 - Intro to Organ Amp 4x10 Alnico Conversion
1:35 - Hammond HR-40 Discussion and Disassembly
3:02 - Sizing & Cutting the 4x10 Speaker Baffle
3:38 - Pine Cabinet Measuring and Marking
4:44 - Marking and Hand Cutting Finger Joints
5:57 - Fitting and Gluing Pine Cabinet
6:39 - Fixing and Finishing Hand Cut Box Joints
7:10 - Rounding Sides and Corners on Router Table
8:32 - Marking Baffle/Door Locations & Installing Braces
9:24 - Cabinet Upholstery and Grill Cloth Installation
11:05 - 8 Ohm Speaker Wiring and Final Construction
12:07 - Recording Setup and Tones!
15:48 - Ending and Outro

#diyguitar #guitarmods #diyamplifier #fenderbassman