Wednesday, December 4, 2024

A speaker crossover network with just an inductor L

At your risk. This idea came by reading Elements of Sound Recording - Frayne, Wolfe. There is a crossover network with the C in parallel withh woofer, L in parallel with tweeter and the 2 drive units are in series. So what if we remove the capacitor. It works! Only the tweeter has an inductor in parallel to it. But it is very tricky as one might need a higher L for the woofer and lower L for the tweeter. Maybe using a tapped inductor, ie an autotransformer could solve the problem, not tried yet. Anyway it sounded quite good with a Philips woofer and a japanese paper tweeter. Actualy it was the first time it was realised that the song What kind of Fool - Streisand, Gibb begins with his (Barry) and her (Barbara) breath in sequence. So far in my humble opinion an 1.7mH inductor in series with woofer and 500nf in series with say 20ohms in with tweeter sound closer to Sennheiser HD580m reference headphones. Driving amplifier is Pleiades 2N3053 with just one transistor in class A of cource and no negative feedback.

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