Q of 7 band passive EQ used on Motown records?

[michael2]

I was reading about the EQs that were used on the old Motown records and just for kicks decided I would try to ape the sound with one of the EQs I have. From what I have read, the original EQs were 7 band passive EQs with set frequencies (50hz, 130hz, 320hz, 800hz, 2khz, 5khz and 12.5khz) and set Q values.

 

I can't find the Q values for those EQs though. I am assuming they're pretty wide. anyone know anything about this, or remember stumbling across it anywhere? I'm also assuming that back in the day they probably just turned down 50, turned up 130 a hair and cranked the top end. sound right to you guys?

 

EDIT: thanks for retitling my query. makes much more sense now.

[fader8]

I can't find the Q values for those EQs though. I am assuming they're pretty wide.

These were built by Motown Records, I think, and were some of the first EQ's to have a proportional Q. Meaning that the Q was wide with smaller settings, but would get tighter as you increased the setting.

 

Logic's Channel EQ emulates this when the Gain-Q Couple Strength setting is set to Strong. I don't know if the boost/cut was symmetrical, however.

[michael2]

I can't find the Q values for those EQs though. I am assuming they're pretty wide.

These were built by Motown Records, I think, and were some of the first EQ's to have a proportional Q. Meaning that the Q was wide with smaller settings, but would get tighter as you increased the setting.

 

Logic's Channel EQ emulates this when the Gain-Q Couple Strength setting is set to Strong. I don't know if the boost/cut was symmetrical, however.

 

awesome, thanks. the boost/cut was symmetrical on those original units. thanks very much.