Subwoofer - Denon AVR-X6400H Service Manual

SUBWOOFER ch
+20dB
+10dB
LINE IN/EXT IN
200mV 0dB
-10dB
-20dB
-30dB
-40dB
LEVEL DIAGRAM
SUB WOOFER ch
AK4458
＋ ＋
PLD
D/A
－
－
DSP
x4pcs
AK4458
1.98Vrms=0dBFS
-10dBFS
-20dBFS
L.P.F GAIN = +6.5dB
-34dBFS(DIG.IN:PCM) -30dBFS
PCM INPUT:-20dBFS L+R
ANA INPUT:200mVrms L+R 30Hz -37dBFS(A/D IN)
-40dBFS
-40dBFS
DD INPUT:-30dBFS LFE 30Hz
(DIG.IN:DD
-50dBFS
AVR-X6400H
NJU72343
FULL SCALE LEVEL Volume IC: NJU72343 NON CLIP MAX SIGNAL LEVEL 4.2Vrms
DOLBY LIMIT LEVEL (ALL ch -3dBFS)
-2.5dB
LINE IN/EXT IN
+11.5dB
+11.5dB
GAIN Setting of MASTER VOL 00dB
･DIGITAL IN -2.0dB -0.5dB
･ANALOG IN -2.0dB -0.5dB +14dB +3.0dB = +14.5dB
① ② ③
①:Basic OFFSET of VOL=0dB (indication valude)
②:Fine-tuning by software Digital input
③:Voltage due to hardware of analog input
④:Correction of Subwoofer
⑤:OFFSET of A/D input
52
GAIN
ADJ.
MUTE
Headroom:3dB
+14.5dB
+14dB = +11.5dB
④ ⑤
PRE OUT
+30dB +30dB
+20dB
+10dB
200mVrms
PRE OUT
150mVrms
-10dB
-20dB
-30dB
-40dB