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Dynaco A-25

Aperiodic Loudspeaker System (1971)

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Dynaco A-25


The Dynaco A-25 aperiodic loudspeaker is a compact, high performance two way speaker system.

A 10 inch extended excursion woofer is matched to a specially designed soft dome tweeter with a dual section high pass filter at 1500Hz, in a cabinet design which achieves a uniquely non-resonant bass response.

The aperiodic, or non-resonant characteristic of the A-25 provides an unusally uniform impedance characteristic throughtout the bass range of less than 2 in 1.

This design utilises an acoustic impedance system which provides variable volume action rather than the totally enclosed cabinet of the acoustic suspension principle or the tuned port of the bass reflex.


Type: 2 way, 2 driver loudspeaker system

Frequency Response: 30Hz to 15kHz

Power Handling: 35W

Recommended Amplifier: 60W (maximum)

Crossover Frequency: 1500Hz

Impedance: 8Ω

Bass: 1 x 10" extended excursion

Tweeter: 1 x soft dome

Finish: oiled walnut, rosewood, teak


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This website is not affiliated with or sponsored by Dynaco. To purchase A-25 spares or accessories, please contact the company via their website or visit an authorised retailer.