Manley VOXBOX - MVB 1996 - 2/2000 and MVBX 6/2000 - 4/2003 User Manual
Page 23
10
12.5
16
20
25
32
40
50
62
80
100
125
160
200
250
320
400
500
620
800
1K
1.6
1.25
2K
2.5
3.2
4K
5K
6.2
8K
100
80
62
50
40
32
25
20
16
12.5
10
8
6.2
5
-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
+1
+1
+1
0
+2
+3
+4
+5
+6
+7
+8
+9
+10
10
12.5
16
20
25
32
40
50
62
80
100
8K
6.2
5K
4K
3.2
2.5
2K
1.25
1.6
800
620
500
400
320
250
200
160
125
100
80
62
50
40
32
25
5
6.2
8
20
16
12.5
10
+11
+12
-11
-12
1K
LOW PEAK
HIGH PEAK
MID DIP
THESE CURVES REPRESENT MAXIMUM
BOOST OR CUT AT EACH FREQUENCY BAND.
NOTICE THAT AS THE FREQUENCY SELECTED
INCREASES THAT BOTH THE MAXIMUM
RANGE AND "Q" INCREASES A SMALL
AMOUNT. THIS IS NORMAL FOR A PASSIVE L-C
EQUALIZER, ESPECIALLY FOR THIS WIDE
RANGE OF SELECTABLE FREQUENCIES.
THE 20 KHZ POSITION IS
PURPOSELY A BROADER
"Q". A NARROW "Q" AT THIS
FREQUENCY WAS BARELY
AUDIBLE.
THIS EQUALIZER IS AN EXTENDED
VARIATION OF THE PULTEC MEQ
PASSIVE CIRCUIT. THE TUBE LINE
AMPLIFIER IS A MANLEY DESIGN.
THE FREQUENCIES FROM 20 HZ TO
150 HZ ARE NEW - AS IS THE RANGE
FROM 6K4 KHZ TO 20 KHZ.
THE 20 HZ POSITION LOOKS
HIGHER IN FREQUENCY AND
LOWER IN RANGE BECAUSE
OF THE INHERANT ROLL OFF
OF THE OVERALL CIRCUIT.
(-3 DB @ 12 HZ.)
-20
-15
-10
-5
0
5
10
15
15
10
-20
5
0
-5
-10
-15
20
20
-15
-10
-5
0
5
-20
10
15
15
10
5
0
-5
-10
-15
-20
+20
+20
MORE VOXBOX CURVES
LIMITER
THRESHOLD AT MAXIMUM
Slope starts at 5:1 quickly becomes 10:1
then towards 20 dB of limiting begins to
return to normal. Opto has 20 dB range
1.25
2K
2K5
1K6
4K
5K
8K
10K
12K5
6K2
3K1
16K
20K
25K
0
-2
-4
-6
-8
-10
-12
-14
-16
-18
1K
-20
3K
6K
9K
12K
DE-ESSER NOTCHES ( the sense filters are shown
are 3K and 12K) METER SHOWS NOTCH DEPTH
COMPRESSOR
THRESHOLD AT MAXIMUM
MED ATTACK / MEDIUM RELEASE
SHOWS 3:1 SLOPE