Rane THX Room EQ User Manual

Page 14

Home THX Equalization Manual Rev. 1.5

SECTION 2: Room Analysis with a Conventional RTA

This method of room analysis was written to mimic the spatial and temporal averaging of the R-2

THX Audio Analyzer. The procedures for choosing microphone positions and the techniques for
equalization are identical with both types of instruments.

2.1) Define The Listening Area:

The first step in correctly equalizing a Home THX Audio System is to identify the listening area.

The equalized response of the system will be averaged over this area to provide a balanced sound
field for all listeners. Equalizing for a single position can result in poor performance at other points in
the listening area. However, calibration of SPL (Sound Pressure Level) may be done from a single
reference position using the internal test signals of the Home THX Controller. These bandwidth limited
signals minimize room mode effects.

You should pay particular attention if the listening area is particularly deep (several rows) or wide.

With some measurement positions very close to Left or Right screen speakers, care will be needed in
averaging the RTA measurements to prevent unintentional weighting.

2.2) Choose Measurement Positions:

Mic Positions

Suggested Microphone Positions for 1 Row Seating

Fig 8