d. Subwoofer Alignment (Cat. No. 441)
d. Subwoofer Alignment (Cat. No. 441)
Step No.
8
9
10
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| Cat. No. | |
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| 441 | |
| signal | ||
| present | ||
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| tp | |
Subwoofer |
| on | |
| cut | ||
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| auto | freq | |
| off | Q | |
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opt gain | |||
surr | mag/dig | ||
gain | gain | ||
Surround | treble | ||
| cut | ||
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| mid | freq | |
Left |
| Q | |
bass | |||
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| tp | |
| treble | ||
Surround |
| cut | |
mid | Q | ||
| freq | ||
Right | bass | ||
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| gain | |
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| gnd | |
| signal | ||
| present | ||
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| Cat. No. | |
|
| 441 | |
| signal | ||
| present | ||
|
| tp | |
Subwoofer |
| on | |
| cut | ||
|
| ||
| auto | freq | |
| off | Q | |
opt gain | |||
surr | mag/dig | ||
gain | gain | ||
Surround | treble | ||
| cut | ||
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| ||
| mid | freq | |
Left |
| Q | |
| bass | ||
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| ||
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| tp | |
| treble | ||
Surround |
| cut | |
mid | Q | ||
| freq | ||
Right |
| bass | |
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| gain | |
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| gnd | |
| signal | ||
| present | ||
Cat. No. | |||
| 441 | ||
Action
Dolby
Dolby
Indication
dB +10
D I P
+5
0
.05 | .1 | .2 | .4 | .8 | 1.6 | 3.15 | 6.3 | 12.5 kHz |
Notes
Turn the freq control on the Cat. No. 441 card. A dip in the frequency response will move along the frequency axis of the RTA display.
Adjust the freq control so the center of the dip is in the same band as the highest peak
in the unequalized subwoofer frequency response you were asked to take note of in | |||||||||||||||||||||||||||||||||||||||||||
Step 5. |
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FROM 5 : |
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| .05 .1 |
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| .2 |
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| .4 | .8 1.6 3.15 6.3 12.5 kHz |
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Subwoofer
Right SurroundLeft Surround
signal present
tp on
cut
auto freq
off | Q |
opt gain mag/dig gain
treble
cut
mid freq
Q
bass
tp
treble
cut
mid freq
Q
bass gain
gnd
signal present
Subwoofer
Right SurroundLeft Surround
Cat. No.
441
signal present
tp on
cut
auto freq
off | Q |
opt gain mag/dig gain
treble
cut
mid freq
Q
bass
tp
treble
cut
mid freq
Q
bass gain
gnd
signal present
Dolby
Dolby
dB +10
S K I R T S
+5
0
.05 | .1 | .2 | .4 | .8 | 1.6 | 3.15 | 6.3 | 12.5 kHz |
dB +10
+5
0
.05 | .1 | .2 | .4 | .8 | 1.6 | 3.15 | 6.3 | 12.5 kHz |
Adjust the cut control so the center of the dip flattens. The center of the dip should be at the same level as the skirts.
Adjust the Q control for the flattest possible frequency response.
