Langevin EQ258A Program Equalizer Sequential Match Pair

Here’s a matched sequential pair of vintage Langevin EQ 258-A Program Equalizers. These are passive, two-band equalizers that allow for boosting and cutting specific low and high frequencies. Low frequency controls for 40 Hz and 100 Hz are available for equalization and attenuation. High frequency controls for 3 kHz, 5 kHz, 10 kHz, and 15 kHz are available with a selector switch. They use an identical circuit to the later Altec 9061 and Langevin 251 Program Equalizers but with higher quality internal components. These are highly regarded units in the professional audio community, particularly for their unique sonic character on kick drums and bass instruments. I can add pigtails to the second unit if desired.