Rane THX Room EQ - Manual (Page 8)

Home THX Equalization Manual Rev. 1.5
8
1.3) Home Theatre and Test Equipment Set-Up
Home Theatre Equipment:
• Switch your Home THX Controller to the “Dolby Pro Logic Surround” mode. The Home THX
Cinema mode must be switched off for this procedure. Note: For Controllers featuring Dolby
AC-3 Decoders, there is no easy method to insert broad band pink noise into this signal path.
Equalization should be done through the Dolby Pro Logic mode on these controllers as well.
• Calibrate the individual channel levels as usual using the internal test signals and a reliable SPL
meter.
• Disconnect or disable the Subwoofer and the channels you are not measuring. You want to ana-
lyze each channel individually and disconnecting unused channels helps prevent assignment
errors. One installer spent a frustrating hour trying to EQ a Center Channel speaker only to find
that he had been playing pink noise through the Right Channel speaker.
• Set the System Volume at Reference.
Pink Noise Sources:
Pink Noise may be obtained from one of the following sources:
• The internal pink noise source of the R-2 Audio Analyzer F-7
• The “Wow!” laser disc, Chapters 8-10.
• The Delos/Stereo Review Surround Sound Test CD
• External calibrated pink noise source (200 mV RMS) placed into each channel’s EQ input.
R-2 Setup:
Defeat any weighting on the RTA portion of R-2 (e.g., “C” weighting). Measurements are to be taken
with flat response.
F-3 , F-4 , F-4
Set the analyzer to Slow Response.
F-2 , F-2
Set your analyzer’s scale to the appropriate SPL range, and the dB per division scale to 2 dB.
F-3 , F-2