EQM-1A3 MASTERING EQUALIZER The EQM-1A3 is an EQP-1A3 with the boost/atten pots replaced with precision 21-position switches. Tapers have been engineered to provide reproducible 0.5 dB / step control* with a maximum boost/atten of 10 dB. Specifications: 20, 30, 60, 100 CPS (Hz) shelf boost, 0 - 10 dB in 0.5 dB steps 20, 30, 60, 100 CPS shelf attenuate, 0 - 10 dB in 0.5 dB steps 3, 4, 5, 8, 10, 12, 16 KCS (kHz) peak boost, 0 - 10 dB in 0.5 dB steps 5, 10, 20 kcs shelf attenuate, 0 - 16 dB *Note: The inherent interaction of Pultec controls affects the step size when both boost and attenuation are applied simultaneously.