Specifications

XD10 Cinema Media Player, Installation and Operating Guide Version 2.1
59 Document #: 9301E692002.1
5.4.3. A Note about DTS Subwoofer Output
The XD10 subwoofer output level ranges from 20 Hz to 80 Hz and 20 Hz to 120 Hz (Coherent
Acoustics format), up to 27 dB above reference (85 dB).
Check your subwoofer’s specifications to avoid damage to the speaker.
If a subwoofer is driven below its cutoff frequency, its driver(s) may become unloaded. When
unloaded, the voice coil can travel outside of the magnet’s gap, overheating and/or causing mechanical
damage to the speaker. A high pass filter should be installed on speakers with high cutoff frequencies.
Contact your speaker manufacturer for more information.
5.4.3.1. Subwoofer Signal in the Surround Channels
The subwoofer signal is derived by filtering the surround signals from 80 Hz and below, and then
putting this signal onto its own “subwoofer” output on the XD10.
You can verify this while performing a B-chain alignment of a theater as follows:
1. Play the internal pink noise generator Subwoofer test. (Refer to Section 7.2.2, Audio Tests, in
Chapter 7, System Setup Menus, in this guide.)
2. Turn off the subwoofer speaker and look at the pattern on the RTA.
You’ll see a dramatic roll-off at 80 Hz. It is normal to see DTS subwoofer pink noise, above 80
Hz, in the surround speakers and amps.