Introduction, Feature list, Control elements 3.1 the front panel – Nilfisk-ALTO EQU User Manual
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EQU131 Front Panel
EQU215 Front Panel
EQU2215 Front Panel
POWER
25
40
63
100
160
250
400
630
1K
1.6K
2.5K
4K
6.3K
10K
16K
LEVEL
0
Channel One
25
40
63
100
160
250
400
630
1K
1.6K
2.5K
4K
6.3K
10K
16K
LEVEL
Channel Two
RANGE
CLIP
6
6
12
12
16KHz
40Hz
BYPASS
HI-PASS
40Hz
LOW-PASS
16KHz
RANGE
CLIP
16KHz
40Hz
BYPASS
HI-PASS
40Hz
LOW-PASS
16KHz
Dual 15 Band Graphic Equalizer
BY-PASS
BY-PASS
EQU2215
LTO
R
1
1
2
6
8 5 7
13
3
12
2
6
8 5 7
13
12
1. INTRODUCTION
Thank you very much for expressing your confidence in
LTO products by purchasing our EQU Series Graphic
Equalizers. With the EQU Series you have acquired an extremely musical and flexible Graphic Equalizer.
The high-end EQU Series are based on many years of experience and are designed to provide a permanent precise
equalization to the musician, performer, studio engineer and sound contractor. The EQU Series can be used
wherever is requested to modify the frequency " contour " of a sound and can offer a solution to many common
sound problems and allows the user to use the creativity to obtain nice results in terms of sound characterization.
EQU Series Graphic Equalizers include the following seven models:
EQU131 -
EQU215 -
EQU2215 -
EQU131VU -
EQU231VU-
EQU231LED -
EQU231TWIN -
Graphic Mono 31 Band Equalizer
Graphic Stereo 15 Band Equalizer
Graphic Stereo 15 Band Equalizer
Graphic Mono 31 Band Equalizer / VU Meter*1
Graphic Stereo 31 Band Equalizer / VU Meter*2
Graphic Stereo 31 Band Equalizer / LED Display*2
Graphic Stereo 31Band Equalizer /LED Display*2
2. FEATURE LIST
Easy to Operate Front Panel Controls
Constant Q circuitry with a 3% center frequency accuracy
Control range
6dB /
12dB selectable
Active balanced and unbalanced input and output connectors
Variable input level control
Signal clip pilot
Ground "LIFT" switch to disconnect signal ground from chassis ground
Power off automatic bypass function
Line voltage selectable
Robust and Compact design
Intended for installation in standard 19" rack space
Manufactured Under ISO9001 Certified management system
3. CONTROL ELEMENTS
3.1 The Front Panel
EQU131
RANGE
BY-PASS
6
CLIP
HI-PASS LOW-PASS
40Hz
16 KHz
LEVEL
20K
16K
12.5K
10K
8K
6.3K
5K
4K
3.15K
2.5K
2K
1.6K
1.25K
1K
800
630
500
400
315
250
200
160
125
100
80
63
50
40
31.5
25
20
31 Band Graphic Equalizer
ON
OFF
12
LTO
R
1
2
3
4
5 76
9 8
POWER
10
13
12
4
3
13
12
4
3
POWER
EQU215
25
40
63
100
160
250
400
630
1K
1.6K
2.5K
4K
6.3K
10K
16K
LEVEL
Channel One
25
40
63
100
160
250
400
630
1K
1.6K
2.5K
4K
6.3K
10K
16K
LEVEL
Channel Two
RANGE
CLIP
6
12
16KHz
40Hz
BYPASS
HI-PASS
40Hz
LOW-PASS
16KHz
RANGE
CLIP
16KHz
40Hz
BYPASS
HI-PASS
40Hz
LOW-PASS
16KHz
Dual 15 Band Graphic Equalizer
BY-PASS
LTO
R
6
12
BY-PASS
1
2
6
8 5 7
1
2
6
8 5 7 10
ON
OFF
10
ON
OFF
0
-
0dB
+17
+12
+6
-12
- 6
0
-
0dB
+18
+12
+6
-12
- 6
0
-
0dB
+18
+12
+6
-12
- 6
0
+12
+6
-12
- 6
0dB
+18
+14
+10
- 8
-12
-
0
+12
+6
-12
- 6
0dB
+18
+14
+10
- 8
-12
-