Consider Connectors

“God is in the detail” – Ludwig Mies van der Rohe (et al)

Sometimes it’s necessary to re-examine the little things, the forgotten details.  Try to dig out the last 10% improvement.

Consider amplifier and loudspeaker connectors.

We know that music signals are alternating current, AC not DC – swinging positive/negative.  We know also that “current in a conductor resides at the surface at high frequency” (Prof. Malcolm Hawksford, HFNRR Aug 1985): Continue reading

Tractrix midrange horn (Pt II) – drive units

In my Tractrix Midrange Horn, the loudspeaker drive units in use for the last few years are the SEAS FA22RCZ.

This driver is inexpensive but materials & build quality are excellent, as you would expect from SEAS.

I have added a tweeter, a Fostex T90A.  This tweeter is sensitive (106dB/W/m).   Continue reading

Basshorn (Pt III) – construction and completion

Low frequencies carry most of the energy and power in music, so a Basshorn needs to be constructed as rigidly as possible, with the minimum of resonances that colour the music.

This Basshorn is large, so very thick panels would be heavy and even more impractical.

In principle I prefer to brace & stiffen thin panels, rather than use thicker & heavier sheet material.

Plywood is lighter with better strength-to-weight ratio than MDF or ‘chip-board’ – in my experience, it sounds better too. Continue reading


The Mauhorn was designed by Andreas Mau, a German Lowther enthusiast, in around 1995

Actually, Andreas designed 2 similar Mauhorns at that time – the Mauhorn IV (shorter 3.5m long horn, larger driver chamber) and the Mauhorn V (longer 4.5m long horn, smaller driver chamber). Continue reading