Acoustic systems '' 15 AS-6 '' (mini), '' 15 AS-506 '' (mini) and '' 15 AS-306 '' (mini).

Acoustic systems, passive or active, as well as electro-acoustic units, hearing aids, electric megaphones, intercoms ...Passive speaker systemsAcoustic systems "15AS-6", "15AS-506", "15AS-306" were produced, respectively, from 1979, 1983, 1987 by the experimental plant VNIIRPA them. Popov, St. Petersburg and the Kirovograd Radio Products Plant. All speakers are the same, the difference is in factories, GOSTs, design and tweeters. 2-way enclosed bookshelf speaker. The peculiarity of the speakers is that in terms of design and parameters they belong to the "mini" class, providing good reproduction of low frequencies at small dimensions. Frequency range 100 ... 20,000 Hz. Sensitivity 78 dB. The unevenness of the frequency response of the sound pressure in the frequency range 250 ... 8000 Hz is about ± 6 dB. Harmonic distortion 3 ... 4%. Resistance 4 ohms. The recommended ultrasonic power is 15 W. Speakers used: LF / MF: 15GD-13, HF: 3GDV-1 (or 2GD-36, or 6GDV-2). The filter crossover frequency is 2000 Hz. The dimensions of the speaker are 200x140x130 mm. Weight 1.9 kg. Photos of acoustic systems from the RT-20 forum and from online stores.