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Rane THX Room EQ User Manual

Page 8

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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