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1642VLZ4

164

2VLZ4

Patchbay Description

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At the risk of stating the obvious, this is where you 

plug everything in: microphones, line-level  instruments 
and effects, and the ultimate destination for your sound: 
PA system, DAW, etc. Many of the features described in 
this section are on top of the mixer, but some are on the 

rear panel.

See Appendix B for further details and drawings of 

the connectors you can use with the 1642VLZ4. Also see 
the channel strip description on page 14 for details of 
the signal routing from the XLR and line inputs.

EZ Interface

Concerned about levels, balancing, impedances, 

polarity, or other interface goblins? Don’t be. On the 
1642VLZ4, you can patch anything almost anywhere, 
with nary a care. Here’s why:

•  Every input and output is balanced  (except 

inserts, phones and RCA jacks).

•  Every input and output will also accept 

 

unbalanced lines (except XLR jacks).

•  Every input is designed to accept virtually any 

output impedance. 

•  The main left and right mix outputs can deliver 

28 dBu into as low as a 600 ohm load. 

•  All the other outputs can deliver 22 dBu into 

 

as low as a 600 ohm load. 

•  All the outputs are in phase with the inputs. 

All we ask is that you perform the level- setting pro

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cedure on page 5, every time you patch in a new sound 
source. So stop worrying and start mixing!

Mic And Line Input Flexibility

Channels 1-8 are mono channels with mic [1] 

 

and line [2] inputs, featuring our Onyx mic preamps. 
Channels 9-10 and 11-12 are stereo pairs with left and 
right line inputs and a single mic input feeding each 
pair. Channels 13-14 and 15-16 are stereo pairs with 

 

line inputs only.

1. Mic Ins

This is a female XLR connector that accepts a  

 

balanced mic or line level input from almost any type 

 

of source. These Onyx mic preamps feature higher 

 

fidelity and headroom rivaling any standalone mic 

 

preamp on the market today. 

These circuits are  

 excellent at rejecting hum and noise. 

The XLR inputs are wired as follows:

 

 

Pin 1 = Shield or ground 

 

Pin 2 = Positive (+ or hot)

 

 

Pin 3 = Negative (– or cold)

Professional ribbon, dynamic, and condenser mics all 

sound excellent through these inputs. The mic/line  
inputs will handle any kind of level you can toss at 
them, without overloading.

Not every instrument is made to connect directly to 

 

a mixer. Guitars commonly need a Direct Injection (DI) 
box to connect to the mixer's mic inputs. These boxes 
convert unbalanced line-level signals from your guitar, 
into balanced mic-level outputs, and provide signal and 
impedance matching. They also let you send your gifted 
guitar renditions over long cables or audio snakes, 

 

with minimum interference or high-frequency signal 
loss. Ask your dealer or guitar maker about their 

 

recommendations for a good DI box.

Phantom Power

Most modern professional condenser mics are 

equipped for phantom power, which lets the mixer 
send low-current DC voltage to the mic’s electronics 
through the same wires that carry audio. (Semi-pro 
condenser mics often have batteries to accomplish the 
same thing.) “Phantom” owes its name to an ability to 
be “unseen” by dynamic mics (Shure SM57/SM58, for 
instance), which don’t need  external power and aren’t 
affected by it anyway. 

The 1642VLZ4’s phantom power is globally  controlled 

by the phantom [22] switch on the rear panel. 

 

(This means the phantom power for all channels 

 

is turned on and off together.)

Summary of Contents for 1642VLZ4

Page 1: ...LOW 80Hz HI 12k MID L R 15 15 U 15 15 U 15 15 U FREQ 200 2k 800 100 8k PRE 1 2 15 U AUX 15 U 3 4 15 U 15 U LOWCUT 75Hz 30 20 10 10 40 50 5 5 U 60 dB OO SOLO LINEIN6 MIC6 ONYX MIC PRE INSERT 1 2 3 4 L...

Page 2: ...ctions importantes pour le fonctionnement et l entretien service dans le livret d instruction accompagnant l appareil 20 NOTE This equipment has been tested and found to comply with the limits for a C...

Page 3: ...E SELECTOR 13 18 POWER CONNECTION 13 19 FUSE 13 20 POWER SWITCH 13 21 POWER LED 13 22 PHANTOM SWITCH 13 23 48V LED 13 24 BNC LAMP SOCKET 13 CHANNEL STRIP DESCRIPTION 25 CHANNEL FADER 14 26 ASSIGN 1 2...

Page 4: ...1642VLZ4 is designed to provide the highest headroom and lowest noise possible for maximum signal integrity Plus it is truly Built Like A Tank with a ridiculously rugged solid steel chasis that includ...

Page 5: ...attached or to the line level inputs of powered speakers Setthelevels It s not even necessary to hear what you re doing to set optimal levels But if you d like to Plug headphones into the phones outp...

Page 6: ...Q are connected to the L R main inserts Digital reverb and delay processors are connected to aux sends 1 and 2 with the aux sends set to post level Effects are added to the main mix via the stereo ret...

Page 7: ...is connected to the stereo line inputs of channels 15 16 A stereo compressor and stereo graphic EQ are connected to the L R main inserts The XLR L R main outs connect to a stereo graphic EQ before con...

Page 8: ...4 and 15 16 are stereo pairs with line inputs only 1 Mic Ins This is a female XLR connector that accepts a balanced mic or line level input from almost any type of source These Onyx mic preamps featur...

Page 9: ...ou can use these inputs for virtually any signal you ll come across from instrument levels as low as 50 dB to operating levels of 10 dBV to 4 dBu as there is 45 dB of gain available via the gain 3 kno...

Page 10: ...racks To feed an 8 track deck with only four sub outs simply use four Y cords Sub Out 1 feeds tracks 1 and 5 Sub Out 2 feeds tracks 2 and 6 Sub Out 3 feeds tracks 3 and 7 Sub Out 4 feeds tracks 4 and...

Page 11: ...s of a parallel effects devices or to the inputs of stage monitor amps To learn how signals are routed to these outputs see the Aux discussion on page 21 Effects Serial Or Parallel You ve heard us car...

Page 12: ...S plug 14 Main Outs Two sets of jacks are provided for the main outputs 1 4 TRS jacks and XLR jacks These are usually patched to the inputs of your 2 track mixdown deck unless you ve chosen to use the...

Page 13: ...s 12V socket will drive any standard BNC type lamp a Littlite 12G or 12G HI high intensity for instance 23 21 24 16 Mono Level If Mr Mono s main mono mix is maxed just reach for this knob and turn it...

Page 14: ...s or outputs that s called nondestructive solo Using the mode 44 switch the 1642VLZ4 s solo system comes in two flavors AFL sometimes called SIP or solo in place and PFL pre fader listen The mode swit...

Page 15: ...ings up this LED will glow steadily when that channel s mute switch is engaged Here is a quick reference to these LEDs 30 Mute Engaging this switch provides the same results as turning the channel s f...

Page 16: ...ffectively bypassed at the center detent The frequency knob sets the center frequency sweepable from 100 Hz to 8 kHz 32 34 20Hz 100Hz 1kHz 10kHz 20kHz 15 10 5 0 5 10 15 20Hz 100Hz 1kHz 10kHz 20kHz 15...

Page 17: ...he channel s aux knobs but also by the aux send 49 master knobs 20Hz 100Hz 1kHz 10kHz 20kHz 15 10 5 0 5 10 15 34 35 36 33 Aux sends can also be used to generate separate mixes for recording or mix min...

Page 18: ...s do not pass through an insert jack on their way to the subgroup faders That s no problem should you want to send these signals through a serial effects processor simply patch from the sub outs to th...

Page 19: ...2 subs 3 4 and tape Selections made here deliver stereo signals to the control room headphones and meter display These signals are tapped off as follows post main mix fader post subgroup faders 38 and...

Page 20: ...ls coming from the solo system After the solo level is determined the solo signals will proceed to take over the control room headphones and meter display Once again PFL solo taps the channel signal b...

Page 21: ...signal off the channel and send it to the aux send 6 outputs Aux 1 and 2 are sent to the aux sends 1 and 2 49 master knobs before the aux send outputs aux 3 and 4 are sent directly These outputs can b...

Page 22: ...send 1 feeds stereo return 1 to aux send 1 master and To aux send 2 feeds stereo return 2 to aux send 2 master They are off when turned fully down deliver unity gain at the center detent and can prov...

Page 23: ...operates just like the channel solo 27 switches engaging it sends signals to the control room headphones and meter display and interrupts whatever happened to be there before you soloed It follows th...

Page 24: ...it s not the mixer Unplug everthing from the main insert 13 Noise Turn the channel faders and stereo return knobs down one by one If the sound disappears it s either that channel or whatever is plugg...

Page 25: ...left cord and a right cord which are plugged into the two mic preamps You can cook up your own adapter for a stereo microphone Y two cables out of a female 1 4 TRS jack to two male XLR plugs one for...

Page 26: ...cases you will have to make up special adapters to interconnect your equipment For example you may need a balanced XLR female connected to an unbalanced 1 4 TS phone plug TIP SLEEVE TIP SLEEVE Unbala...

Page 27: ...ack labeled left mono The signal will be routed to both the left and right sides of the return circuit and will show up in the center of the stereo pair of buses it s assigned to or it can be panned w...

Page 28: ...rt return 2 5 k All other inputs 10 k or greater Tape out 1 1 k All other outputs 120 3 Band EQ channels 1 8 High Shelving 15 db 12 kHz Mid Peaking 15 dB sweep 100 Hz 8 kHz Low Shelving 15 db 80 Hz Lo...

Page 29: ...1 TAPE OUT MAIN MIX RIGHT OUT METERS 0VU 0dBu TAPE IN L R TAPE LEVEL C R PHONES SOURCE MAIN TAPE 1 2 RUDE SOLO LED C R PHONES MIX C R LEVEL CONTROL ROOM OUT L R PHONES OUT A SIP PFL SOLO LEVEL SOLO MI...

Page 30: ...30 1642VLZ4 1642VLZ4 Track Sheet Session Notes Date...

Page 31: ...ed service representative will at its option either repair or replace any such nonconforming product provided that Customer gives notice of the noncompliance within the Warranty Period to the Company...

Page 32: ...16220 Wood Red Road NE Woodinville WA 98072 USA Phone 425 487 4333 Toll free 800 898 3211 Fax 425 487 4337 www 720trees com...

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