Vermes
Advanced Member level 4
It is a design of stage speakers with built-in Unitra amplifier PW9010. Speakers can be additional element of sound system for a band. The main sound system is based on a set of Yamaha Club Series S115V + sub.
The amplifiers were processed so that all regulators, fuses, sockets are on one side. In addition, there were applied large capacitors and more powerful rectifier bridge to the line of power supply. Due to the fact that the amplifier may operate in bad conditions for dissipating heat, there are two 9cm fans with a switch: 0 rotations, ½ rotations and max.
Speakers use a crossover for the woofer 6dB/oct. to 5kHz and for the tweeter from 5kHz 12dB/oct. You can continue tuning the tweeters with resistors.
Housing was made of 10, 12 and 14mm thick plywood. The internal capacity of the housing is 35l, as it was intended to be not large. Then the housing was wrapped in a special material for speakers. Bass speakers were protected with a net and the front had a masking of speaker cloth.
Pictures:
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Link to original thread - Aktywne kolumny estradowe 2x35 W RMS - al'a "Bigos na winie"