Legacy Audio Whisper XDS - Manual (Page 14)

14
Step 1:
-start with everything muted
-un-mute input 1
-un-mute output 1 and verify the rear left woofers are all playing.
Step 2
-mute output 1
-un-mute output 2 and verify only the front left woofers are all playing
Step 3
-mute output 2
-un-mute output 3 and verify the mids and tweeters are all playing
Step 4
-un-mute output 2, the acoustic energy should increase as it sums with output 3
-un-mute output 1, the signal should increase in deep bass primarily
Now do same for right channel
Step 5
-start with everything muted
-un-mute input 2
-un-mute output 5 and verify the rear right woofers are all playing.
Step 6
-mute output 5
-un-mute output 6 and verify only the front right woofers are all playing
Step 7
-mute output 6
-un-mute output 7 and verify the mids and tweeters are all playing
Step 8
-un-mute output 6, the acoustic energy should increase as it sums with output 7
-un-mute output 5, the signal should increase in deep bass primarily
Installer Calibration Instructions
Step 9
Un-mute inputs 1,2
Un-mute outputs 1,5, the low bass should sum up
Un-mute outputs 2,3,6,7 bass should be solid and not sound phasey
Step 10
Adjust path length to speakers until equidistant. Adjust balance on inputs 1 and
2 until image is centered
Step 11
EQ the left speaker with pink noise using the parametrics on Input 1, followed
by graphic filters if needed.
Step 12
EQ the right speaker with pink noise using the parametrics on Input 2, followed
by graphic filters if needed.
Step 13
Voicing each speaker:
We are looking for a curve that is flat with the following exceptions.
- a gentle 1.5 dB depression from 1khz to 3kHz,
- a 2 dB rise at 20kHz ramping from 5kHz gently upward.
With customer’s approval apply a sharp electrical roll-off below 32 Hz. (Nothing
but mechanical junk down there in 99% of recordings).
Step 14
With both speakers playing music in mono, adjust L, R input levels until perfectly
centered. If there is a 2dB difference that is ok, then
the room is just that
asymmetric in power response.
Step 15
Unmute inputs 3,4 to activate stereo low frequency correction
Step 16
Final voicing: Listen to the full spectrum. Any adjustments should be made care-
fully on each side to retain balance.
Be sure to feed left input to both 1,3 and right input to both 2,4 with XLR splitter cable off preamp