MÄAG EQ4-500 Limited Edition, One-Channel 6-Band Equaliser 500 Module, Limited edition, Special model limited to 100 units worldwide with black front panel, Hand signed by Cliff Maag, Frequency bands in the main range: Sub or 10 Hz, 40 Hz, 160 Hz, 650 Hz and the 2.5 kHz shelf EQ, Boost/cut range of +15 dB and -4.5 dB with a centre position of 0 dB, Air band shelf equaliser settings: off, 2.5, 5, 10, 15, 20 and 40 kHz, Air Gain Increase of the air band shelving equaliser by up to +20 dB, Bypass switch, Design: 500 Series module