Detailed instructions for use are in the User's Guide.
[. . . ] User's Manual
L-8
8-CHANNEL MIXING CONSOLE WITH DIGITAL EFFECTS
LTO www. altoproaudio. com Version 1. 2 August 2004
R
English
SAFETY RELATED SYMBOLS
CAUTION
RISK OF ELECTRIC SHOCK DO NOT OPEN
the recommended fuse type as indicated in this manual. Before replacing the fuse, make sure that the product is OFF and disconnected from the AC outlet.
Protective Ground
This symbol, wherever used, alerts you to the presence of un-insulated and dangerous voltages within the product enclosure. These are voltages that may be sufficient to constitute the risk of electric shock or death. This symbol, wherever used, alerts you to important operating and maintenance instructions. [. . . ] AUX1 is configured as PRE-FADER, so, generally, it can be used for monitor application. While AUX2 is configured as POST-FADER, therefore, most of the times, it will be used for effects and processors input, however, you can also changed it to PRE-FADER configuration according to the specific application. (For more detail, please see chapter 6. ) In this typical compact unit, excluding sending out directly to the external effect or processor equipment, AUX SEND2 will also be sent to the internal onboard effect module.
-15 -15
EQ
HI 12kHz
0
+15
MID 2. 5kHz -12 0 +12
LOW 80Hz +15 0
1
AUX
PRE
4. 7 PAN
10
-
This is the PANORAMA control, or balance control. You can adjust the stereo image of the signal via this Control. Keep this control in center position and your signal will be positioned in the middle of stage. Turn this control fully counterclockwise and the signal will be present only on the left speaker and vice-versa. Of course a wide number of intermediate positions is available.
D F X
+15
2 /
0
+15
8
9
POST (PRE)
8
PAN
10
4. 8 PEAK
11
LEFT 0
RIGHT
Inside your L-8 the audio signal is monitored in several different stages and then sent to the PEAK Led. When this Led blinks, it warns you that you are reaching signal saturation and possible distortion. The PEAK Led will blink with a level that is 6dB before actual clipping.
11
PEAK
12
+15
LEVEL
4. 9 LEVEL
12
This Control will adjust the overall level of this channel and set the amount of signal sent to the Main output.
4. 10 INSERT
13
Insert points are provided for the Mono Mic Channels. When you insert a jack in the insert socket, the signal will be taken out after the Input Gain Control (Trim), sent to an external processor such a compressor-limiter, and returned into the channel strip immediately before the EQ section. Of course, the jacks used must be stereo (Tip Send/ Ring Return).
CHANNEL INSERT
(PRE-FADER/PRE-EQ TIP SEND/RING RETURN)
CH4
CH3
CH2
CH1
13
10
8
4. 11 MASTER SECTION
- MAIN MIX LEVEL
14
This Control sets the amount of signal sent either to the Main Out socket or to the Tape Output.
- LED METER
15
This stereo 12 segments Led Meter will indicate the level of the overall output signal.
- 2 TRACK signal path
16 19 20 15
If you push down the 2TK TO CONTROL ROOM button, the 2 TRACK IN signal will be routed into the Control Room output and the level will be adjusted by the Control Room knob nearby the Main MIX LEVEL knob. If you push the 2TR TO MIX button the 2 TRACK IN signal will be routed into the MAIN output and will be adjusted by the MAIN MIX LEVEL knob.
0
L
CLIP 10 7
R
18
+15 AUX2/DFX TO AUX 1 0
POWER
PHANTOM
8
4 2 0
- AUX RETURN
17 17
+15 AUX RTN 1 0
-2
8
As implied in the name, the Auxiliary Returns are used to 'return' the signal from the external effects or processors to the main mix, but, most of the times, it can also be worked as the additional stereo line inputs. In this typical compact unit: AUX RETURN1 is configured to be assigned to the main mix bus permanently, for mono application, only use the left input jack. But for AUX RETURN2, instead of assigning the returned signal to main mix bus, it can also to AUX1 bus, and in this case, adjust AUX2/DFX TO AUX1 knob (18) to control the input level. Normally, AUX RETURN2 is connected rightly with the output of the internal digital effects, but, this signal flow will be broken, if you have any external signal inserted from these two jacks.
8
-4 -7
2TK TO MIX
-10 -20
+15 AUX RTN 2 (DFX)
-30
2TK TO CTRL ROOM
OUTPUT LEVEL
0
-
MAX
CONTROL ROOM
-
+15
PHONES /
8
MAIN MIX LEVEL
21
16
8
14
- POWER LED
19
This LED indicates when the Power is on in your L-8.
- PHANTOM LED
20
This LED indicates when the Phantom Power is switched on.
- PHONES/CONTROL ROOM
21
This Control sets the amount of signal sent to the Control Room and headphone.
11
- 24 BIT DIGITAL EFFECTS PRESETS
22 22
Adjust this knob to select the right effect you wish to perform. There are total 16 options for you: several kinds of reverb, mono and stereo delay, effects with modulation, and versatile two-effect combination.
15 14 13 12 11
16 1
2
3 4 5 6
10 9 8 16 1
7
PRESETS
VARIATIONS
23
23
Since you have selected the preferable effect, the next step, please go with the fine consideration, there are also total 16 variations for each preset, Each variation may be managed by several different factors.
15 14 13 12 11
2
3 4 5 6
1. REVERB + CHORUS
10 9 8
7
VARIATIONS DFX MUTE
PEAK
24
25
MUTE SWITCH
24
This switch is used to activate/deactivate the effect facility. Sometimes, you can also use the DFX FOOTSWITCH for convenient operation.
PEAK LED
25
This LED lights up when the input signal is too strong. In case of the digital effect module being muted, this LED also lights up.
- DFX FOOTSWITCH
26
DFX FOOTSWITCH
This 1/4" phone jack can be used to connect an external footswitch to turn on/off the onboard effect module.
26
- PHONES
27
27
PHONES
This socket will send out the mix signal to a pair of headphones.
- STEREO AUX RETURN
28
Use these stereo 1/4" phone socket to return the sound of an effect unit or sound processor to the Main Mix. Alternatively you can use them as an extra auxiliary input.
STEREO AUX RETURN
LEFT(MONO) RIGHT
AUX SEND 1 L
2-TRACK IN/OUT
1
- AUX SEND
29
LEFT
RIGHT
R 2
2
These 1/4" phone sockets are used to send out the signal from the AUX Bus to external devices such as effects and sound processors.
TAPE IN
TAPE OUT
28
29
30
12
- 2-TRACK IN/OUT Input
30
Use the Tape input if you wish to listen to your Mix from a Taper Recorder or DAT, you can assign the signal coming form the Taper Recorder either to a pair of studio monitor using the Control Room assignment on the front panel or directly to the Main Mix. Output These 1/4" TRS sockets will route the main mix into a tape recorder.
4. 12 REAR PANEL DESCRIPTION
31
POWER ON
4
PHANTOM
CAUTION:
MAIN MIX OUTPUT (BAL/UNBAL) RIGHT LEFT
Use only with a 250V fuse
CAUTION
RISK OF ELECTRIC SHOCK DO NOT OPEN
REPLACE WITH THE SAME TYPE FUSE AND RATING DISCONNECT SUPPLY CORD BEFORE CHANGING FUSE WARNING: SHOCK HAZARD - DO NOT OPEN AVIS: RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR OFF CONTROL ROOM OUTPUT
2 3
1
2 3
1
LEFT
LEFT
AC INPUT
EUROPE 210-240V 50Hz Fuse:T250mAL
RATED POWER CONSUMPTION: 25W
RIGHT
RIGHT
32
USA / Canada 100-120V 60Hz Fuse:T500mAL
UK / Aust 240V 50Hz Fuse:T250mAL
33
34
- POWER
31
This switch is used to turn the Main Power ON and OFF.
- PHANTOM
4
This switch will apply +48 Volt Phantom Power only to the 5 XLR microphone inputs. Never connect microphones when the Phantom Power is on already.
- AC INLET WITH FUSE HOLDER
32
Use it to connect your L-8 to the Main AC with the supplied AC cord. [. . . ] Depth 40 40 40 40 40 40 70 70 40 40 40 40 40 40 70 70 Left F. B. 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 Rev level 90% 90% 90% 90% 90% 90% 90% 90% 90% 90% 90% 90% 90% 90% 90% 90%
24
8. TECHNICAL SPECIFICATION
Mono input channels
Microphone input Frequency response Distortion (THD & N) Gain range SNR (Signal to Noise Ratio) Line input Frequency response Distortion (THD & N) Sensitivity range electronically balanced, discrete input configuration 10Hz to 55kHz, + 3dB 0. 005% at +4dBu, 1kHz 0dB to 60dB (MIC) 115dB electronically balanced 10Hz to 55kHz, + 3dB 0. 005% at +4dBu, 1kHz +15dBu to 45dBu
Stereo input channels
Line input Frequency response Distortion (THD & N) unbalanced 10Hz to 55kHz, + 3dB 0. 005% at +4dBu, 1kHz
Impedances Microphone input Channel Insert return All other inputs Tape out All other output Equalization
Hi shelving Mid bell Low shelving Low Cut filter
1. 4kOhm 2. 5kOhm 10kOhm or greater 1kOhm 120Ohm
+ 15dB @12kHz + 12dB @2. 5kHz + 15dB @80Hz 75Hz, 18dB/oct.
DSP SECTION
A/D and D/A converters DSP resolution Type of effects 24 bit 24 bit Hall, Room, Vocal & Plate REVERBS Mono & Stereo DELAY (max DELAY TIME 650ms) Chorus, Flanger & Reverb MODULATIONS REVERB+DELAY, REVERB+CHORUS, REVERB+FLANGER combinations 256 16-position PRESET Selector 16-position VARIATION selector CLIP LED MUTE SWITCH with LED indicator
Presets Controls
Main Mix Section Noise (Bus noise)
Max output AUX Return gain range AUX Sends max out
Fader 0 dB, channels muted: 100dBr (ref. :+4dBu) Fader 0dB, all input channels assigned and set to UNITY gain: 90dBr (ref. :+4dBu) +22dBu balanced XLR, +22dBu unbalanced, 1/4" jacks OFF to +15dB +22dBu
26
Power supply Main voltage
USA/Canada Europe U. K. /Australia
100 120V~, 60Hz 210 240V~, 50Hz 240V~, 50Hz
Power Consumption Fuse Main connection
25 watts 100 120V~ : T500mAL 210 240V~ : T250mAL Standard IEC receptacle
Physical Dimension (W D Net weight Shipping weight
H)
245mm 268mm 3. 0Kg (6. 62lb) 4. 1Kg (9. 04lb)
24/73mm (9. 64"
10. 54"
0. 94"/2. 87")
27
10. WARRANTY REGISTRATION CARD To obtain Warranty Service, the buyer should first fill out and return the enclosed Warranty Registration Card within 10 days of the Purchase Date. [. . . ]