User`s manual

B-Chain Alignment Procedures
Notes
5-11
5.2 Setting Room Equalization
Cycle the pink noise to the center channel.
While observing the RTA, adjust the bass controls on the EQ board so that the
bass frequency response is as flat as possible.
The left hand L.F. control sets the frequency range. The right hand L.F.
control sets the boost or cut.
Next, adjust the H.F. trim control on the Cat. No. 510 card so that the level of
the H.F. section of the curve matches the level of the midfrequency section.