Velodyne Acoustics Digital Drive Appendix D Important Subwoofer Information, THX Cer tified Ultra

Appendix D: Important Subwoofer Information

Important Information Regarding your Velodyne Digital Drive™ Series Subwoofer (DD-15 and DD-18 only) and THX™ Ultra2

THX Ultra 2 Pr esets for the Velodyne Digital Drive Series:

To set the DD-15 and DD-18 to meet THX Ultra2 requirements, customize Preset 5 with the following parameters:

Low Pass Crossover Frequency: OFF

Low Pass Crossover Slope: 6 dB per octave

Subsonic Frequency: 15Hz

Subsonic Slope: 24 dB per octave

Phase: User adjustable

Polarity: User adjustable

Volume: 25

Contour Frequency: Default

Contour Level: 0.0

Theater/Music: 8

Night Mode Volume: Default in OFF position

THX Cer tified Pr e - Amp/Receivers:

If you have a THX Certified Pre-Amp/Receiver, please connect the “(THX)” input on the back panel of the DD-15/DD-18 to the ”Sub Out” connector of the THX Pre-Amp/Receiver. Also set the DD-15/DD-18 to the THX Preset 5, set the system response of the subwoofer as per the owners manual and then calibrate the THX Pre-Amp/Receiver. This ensures that the bass management and calibrated levels are optimized for your system.

As this is a new THX Ultra2 subwoofer, if your Pre-Amp/Receiver is THX Ultra2 Certified, you may use the Boundary Gain Control in the setup menu of the THX Ultra2 Pre-Amp/Receiver to compensate for any excessive bass heard in the room if you are close to a wall.

THX Cer tified Ultra 2 :

Before any home theatre component can be THX Ultra2 certified, it must pass a rigorous series of quality and performance tests. Only then can a product feature the THX Ultra2 logo, which is your guarantee that the Home Theatre products you purchase will give you superb performance for many years to come. THX Ultra2 requirements cover every aspect of the performance of the product including power output, frequency response, distortion, etc.

.w w w . v e l o d y n e . c o m Digital Drive User’s Manual

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