pedalpa.org.uk
loudspeakers

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[big speakers pic]

(big speaker construction info)

[small speaker pic]

The small speakers are home constructed from 12mm ply (front & back) and 18mm (other sides). Parts - 14x12x6" boxes, painted in blackboard paint. Main drivers - Monacor SP-202E ( their code 10.3980) 8" dia 50W rms 4 Ohm - SPL 91dB. A compromise on size, price & efficiency - in these applications speaker efficiency, which can vary greatly, as does the useful audio volume. Tweeters - cheap piezo horns, wired in with a series 80 Ohm resistor.