Job preparation and quick demo
Shelly13 - Part2
Shelly13: Project status, prototype scetches
I’m still thinking a lot about Shelly13 and how it can possibly work out to have a bigger speaker, a homogenous sound with some punch, and a sealed cabinet design that can be folded.
Cabinet: Sizing and Volume
Latest designs in my head work with 12x10 and a 14x10 inch shells. It will look a bit like a cake when unfolded, with a total cabinet volume of around 38l incl. speakers and amplifier mounted inside. It will be about 75cm of total height with its feet unfolded and about 29cm high when completely folded.
While my first design shows a 10” speaker mounted at the front of the cabinet, I’ll most likely switch to a two-way design for simplified mounting, mitigating the issues about milling a huge curved surface and creating an adapter plate. So I’ll chose an 8” Bass speaker in a downfire setup and a 3” mid-high speaker at the front.
I’m thinking about using a car amplifier that takes its signal from an active crossover with separated outputs for low and high frequencies, creating a bi-amp design with bridged terminals.
Folding will take place with the help of drawer rails mounted in between the shells. It is crucial that the cabinet is sealed air-tight when unfolded, so there has to be a ring gasket that engages when the lower wooden ring at the bottom of the 12” shell meets the top ring of the 14” shell.
Nah, this is too complex!
Ok, let’s strip it down. Leave the foldability away for the initial prototype. Reduce cabinet size instead. Concentrate on electronics and manufacurability first. Outcome of this scope change is: AnywhereAmps Alpha!
of an audio amplifier
From investigation to problem solution
From Pixel to Vector graphics
Symptoms of insufficient spindle power
Beginner CNC issue: Speeds/Feeds
Automatic Z-referencing, Tool length, Tool changes
EdingCNC Settings & Variables
Software/Hardware setup & kinematics
Assembling Sorotec’s Basicline 0607
Switch box setup
Entry-point and questions
Circuit & Application examples
USB-PD power supply explained
Can I use a Metabo/CAS battery for my system?
How to set protective voltage & current limits
Current inrush limiters explained
Electronics knowledge: TVS diodes
Or how to kill your circuits
How to properly talk to VideoLan’s VLC player
Prototype build, issues, improvement ideas for Revision2
How To: First steps with FreeCAD
Professionalizing circuits for AnywhereAmps
AnywhereAmp Alpha’s simple single-supply preamp
Design, folding, stability, amplifiers
Evolving the mobile, foldable instrument combo
Fix ‘ERROR: favicon not found’
Export the instructions from Markdown to PDF! but how?
Why some images display OK locally but won’t on Github
How to make ToC sticky
How to solve issues with disappearing posts
Configure: landing page’s header image, Navigation