Robsan-DIY

T-Pole design has been updated. I also switched from Sketchup to Fusion 360 (much better).

I've moved my website to my own platform. There are some broken pages, links, and images that will be fixed soon.

The T-Pole design has been updated.  I came up with a new sub woofer mounting system that enhances the aesthetics by slenderizing the manifold.

T-Pole Speaker

I uploaded some old miscellaneous dipole designs.  These ideas have been rattling around in my head for about 10 years now.  I haven’t tested any of them yet.  If you decide to rip my designs off, please post a link to the original work.  Let me know how well the designs test.

Dipole Sketches

This is an old design I pulled from my archives and uploaded for reference. I like the way this design looks but I wouldn’t use the RAAL tweeter.  The RAAL tested poorly.

Heritage Dipole

RAAL 70-10D Distortion

There’s still a fair bit of modeling left to finish this design, however, the basic structure is all there.

T-Pole

So far these two drivers are the best mid-basses of the group:

Mid Bass Tests

TL N26C-A and SS D2004 tweeter tests:

Tweeter Tests

Faital Pro 8PR200 tests:

Faital Pro 8PR200

A few tests of the AE LO10:

Acoustic Elegance LO10

I tested a group of mid bass drivers for my T-Pole project.  Some of these driver I knew wouldn’t be contenders for this project, but I had them on hand, and tested them anyway so I could share the results with others.

Mid-Bass Tests

Welcome! The objective of this site is to share what I’ve learned from over 30 years of building loudspeakers. I built my first pair of loudspeakers when I was 14. I pulled a pair of drivers from a Panasonic boom box and built an enclosure made of particle board and OSB. I also pulled a two pairs of paper cone tweeters from two other speakers to round out the design. It was my first and only TTW speaker.

Using the original capacitors, I wired the top tweeter with an on/off switch so I could have a treble boost/cut. I “added” some bass output to the diminutive 5" Panasonic woofers by porting the system with paper towel cardboard tube, tuning the port was by ear of course. Shortly after building that system my good friend Bones became interested in speaker building and picked up Designing, Building and Testing Your Own Speaker System by David B. Weems, I “borrowed it” from him and I still have it, thanks Bones! I quickly learned that building loudspeakers was much more complex than I had thought. Hopefully I’ve learned a few things about speaker design since then. 

Introduction

My USAF dorm stereo from 21 years ago:

This system used an active crossover, notice the DSP crossover above the sub woofer.