- From the 500 series - 7 centre frequencies selectable per band - 12 dB of boost / cut per band - EQ band 1 and 4 in selectable shelf / peak characteristics - Traditional API circuit design - Headroom up to +30 dB - In / Out switch - Reissue of the 1967 API 550EQ with an additional band - Requires the API Lunchbox 500-6B or 500 VPR slot rack EUR 1429.00 - See more - Buy online