Tuesday, 21 December 2021

Riaad Moosa - Doctor's Orders


Vroulief: Lees 'n tydskrif, rook en luiser na "Another brick in the Wall" met Sennheisers - circa '82


Yup! She's still mine:)

Victor Haboush (1924-2009) - If profanity is an issue for you, well don't watch.

Victor Haboush passed away on May 24, 2009 at age 85.
A first-generation American of Lebanese descent, he was born on April 16, 1924 and grew up in Indianapolis, Indiana.

In the mid-1960s, Vic left animation and shifted into live-action.
He started his own studio, Victor Haboush & Associates, which later became The Haboush Company.
Over the next thirty years, he directed and photographed over 1,500 commercials, winning numerous Cannes Gold and Silver Lions, Clios and IBAs.


Friday, 10 December 2021

Jordan Peterson At Oxford Union:


When Dr. Jordan Peterson was still welcome at Oxford (2018) with 8,633,664 views.

Monday, 29 November 2021


Acoustic Research AR-25
Two Way Loudspeaker System (1979)


Type: 2 way, 2 driver loudspeaker system
Frequency Response: 40Hz to 25kHz
Power Handling: 50W
Recommended Amplifier: 15 to 60W
Crossover Frequency: 2000Hz
Impedance: 8Ω
Sensitivity: 86dB
Bass: 1 x 200mm acoustic suspension
Tweeter: 1 x 32mm pressure
Dimensions: 298 x 544 x 197mm
Weight: 11kg

"If God wanted us to go to concerts, He would have given us tickets.  AR circa 1980."

Sunday, 28 November 2021

Waldorf School, Project Year, Loudspeaker Design

Waldorf High Schools like Michael Oak Waldorf School tuition covers all the requirements of the SA Schools syllabus, but also offers a richer depth of learning.

The subwoofer featured in this article, was part of my son's Class 12 project at Constantia Waldorf School for that year.
Michael Oak did not have a high school at the time.

Brief summary of the design strategy:

I worked for Prosound in Johannesburg during the '80s and early '90s, running an R&D department that was tasked to produce assembly-line-style professional sound equipment on demand.
For example, we had less than 2 weeks to prepare and deliver everything that was required for Paul Simon concerts.
Ad Valorem taxation applied to the components we stocked.
It's basically a disincentive to produce certain commodity items locally, such as:
"Motor Vehicles, Electronic Equipment, Cosmetics, Perfumeries and other products generally regarded as “luxury items” ".

Armed with my EV equipment, experience and familiarity with Thiele-Small speaker alignment based on Chebyshev filters, my son and I worked our way through the design process and ended up with what is presented below:

The Sub Woofer 13 years later (November 2021):

The Workshop (May 2008):

The Design - Thiele-Small DIY:

Cabinet Making