THEL SUBSONICFILTER HQ-SUB À NEUILLY PLAISANCE

2 x Thel subsonic filter module HQ_SUB which I no longer need. Modules were never used. It is a mono module so two are required for stereo systems Precision filter with 30dB slope. Low bass correction allows level drop in the takeover area to equalize. Range of application 1. to attenuate the subsonic frequencies of all woofers. 2. as low bass correction, especially for bass reflex systems. 3. as a particularly high-quality rumble filter in phono preamplifiers. Technical data (from Thel Audio website) Betr. spg. balanced: +/-9V to +/-60V optimal: +/-12V to +/-20V current: +/- 5-25mA, depending on the operating voltage max. input level: +/- 5Vs* max output level: +/- 15Vs Bass Boost: 0 to approx. +10dB Input Resistance: 39 kOhm adjustable frequencies: 13-53Hz in 2-3Hz steps gain: 0 to 3-fold dimensions: 74 x 68 x 15mm