Nilfisk-ALTO EQU user manual Introduction, Feature List, Control Elements, The Front Panel

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 - Graphic Mono 31 Band Equalizer

EQU215 - Graphic Stereo 15 Band Equalizer

EQU2215 - Graphic Stereo 15 Band Equalizer EQU131VU - Graphic Mono 31 Band Equalizer / VU Meter*1 EQU231VU- Graphic Stereo 31 Band Equalizer / VU Meter*2 EQU231LED - Graphic Stereo 31 Band Equalizer / LED Display*2 EQU231TWIN - 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 Front Panel

																								31 Band Graphic Equalizer
																															+12 +6	+17
R
LTO																															0	0dB
EQU131
																															-12 - 6	-
20	25	31.5	40	50	63	80	100	125	160	200	250	315	400	500	630	800	1K	1.25K	1.6K	2K	2.5K	3.15K	4K	5K	6.3K	8K	10K	12.5K	16K	20K	LEVEL

HI-PASS LOW-PASS BY-PASS RANGE

40Hz 16 KHz CLIP 6 12

ON

OFF

							POWER
1		2	3	4	5 76	9 8	10
EQU215 Front Panel	4 12 13				3	4 12 13
3

R

LTO

EQU215

Dual 15 Band Graphic Equalizer

Channel One

HI-PASS

LOW-PASS

+18

40Hz

+12 +6

16KHz

40Hz

16KHz

0

0dB

12

6

-12 - 6

-

BY-PASS

25

40

63

100

160

250

400

630

1.6K

2.5K

6.3K

10K

16K

BYPASS

RANGE

1K

4K

LEVEL

CLIP

Channel Two

HI-PASS LOW-PASS

+12 +6

+18

40Hz

16KHz

40Hz

16KHz

0

0dB

12

6

-12 - 6

-

BY-PASS

BYPASS

25

40

63

100

250

400

630

1K

1.6K

2.5K

4K

6.3K

10K

16K

RANGE

160

LEVEL

CLIP

ON

OFF

POWER

1	2	6	8	57	1	2	6	8	57 10
EQU2215 Front Panel				12 13					12 13

R

LTO

EQU2215

Dual 15 Band Graphic Equalizer												Channel One
															+12 +6	+18
																+14
																+10	3
															0	0dB
																HI-PASS LOW-PASS
																- 8		40Hz
																		16KHz
																-12	40Hz	16KHz
																		12
															-12 - 6	-0		6
																BYPASS		BY-PASS
25	40	63	100	160	250	400	630		1.6K	2.5K		6.3K	10K	16K				RANGE
								1K			4K				LEVEL			CLIP

Channel Two

+12 +6

+18

+14

+10

0

0dB

HI-PASS LOW-PASS

- 8

40Hz

16KHz

-12 40Hz

16KHz

12

-12 - 6

-

6

BYPASS

BY-PASS

25

40

63

100

250

400

630

1K

1.6K

2.5K

4K

6.3K

10K

16K

RANGE

160

LEVEL

CLIP

ON

OFF

POWER

1 2 6 8 5 7 1 2 6 8 5 7 10

4