Tech Corner

Technical resources for the curious and the committed.

Listening

• About Music Listening — loudspeaker, room, hearing and the listener treated as one system

Measurement

• Binaural Microphone — measurement dummy head; a tool, not a product
• Sound examples — binaural recordings; headphones

Speaker Technology

• Unique Design & Style — why it looks the way it does
• Dipole All The Way — full-range open baffle explained
• Current Drive for THD Reduction — the measurement evidence
• Dev AMP — development amplifier to switch voltage, current and mixed-mode drive on the go
• Flat Frequency & Phase — FIR crossovers and phase coherence
• Minimum Cabinet Coloration — construction approach
• Smooth Power Response — why directivity matters
• Crosstalk Cancellation — DSP-based imaging
• Single Speaker Stereo — Technical Detail — driver wiring, mid/side gain and streaming
• Single Speaker Stereo Prototype — the wiring variants that were tested first
• Seamless Crossover — 48dB/oct FIR filters
• Equal Loudness Control — volume-dependent compensation

Tools & Downloads

• WAF Loudspeaker Calculator

Projects & Experiments

• Dev AMP — not a product: a tool to decide which output-impedance mode to build
• Audio Machine — unfinished proof of concept; audio and fun
• New Amplifier Board — 2021 development diary; the board later used in Single Speaker Stereo
• Noise Floor 14 dBA — Primo EM273 capsule self-noise on a quiet recording
• Historic Photos
• Non Audio Related