api 553 (Vintage)
API
□ 500 Series 3-Band Equalizer
・Fixed frequencies equalizer
・HF & LF(shelving) , MID(3Khz) +/- 15db boost/cut
・Discrete circuit
・Unbalanced input
・Used one 2520 opamp "HUNTINGTON, N.Y."
・Fixed frequencies equalizer
・HF & LF(shelving) , MID(3Khz) +/- 15db boost/cut
・Discrete circuit
・Unbalanced input
・Used one 2520 opamp "HUNTINGTON, N.Y."