PRIVATE Q2

PRIVATE Q2
Mytek PQ Multichannel System – User's Manual
Mytek PQ Multichannel System
User's Manual
ver. 1.0 / Jan 2014
© Mytek 2014
Mytek PQ Multichannel System – User's Manual
This manual may be updated at any time.
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please visit:
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or at:
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Mytek PQ Multichannel System – User's Manual
Content
Headphones Considerations.......................................4
Operation....................................................................... 5
Fixed installation........................................................... 7
Floating system............................................................. 8
Grounding..................................................................... 9
Accessories................................................................... 11
Wiring........................................................................... 12
Private Q template...................................................... 15
Warranty ..................................................................... 16
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Mytek PQ Multichannel System – User's Manual
Headphones Considerations
The Private Q system with its built-in "Class A-AB" amplifier
provides the highest quality amplification. Because of this
very clean sound of the amplifier, the differences between
various types of headphones become more obvious, similar to
differences between studio monitor speakers. We spent a
great deal of time experimenting with different types of
headphones together with some users of the system.
Here are some tips:
The Private Q provides very high (52Vpp) output voltage
swing and can be loaded down to as low as 4 ohms. This is
sufficient to drive all types of headphones and also speakers!!
We found that although the choice of headphones is strictly
personal the following applies:
1. Choose headphones for the main type of music you
recording, for their durability and comfort.
2. If you need extremely loud levels of sound (hard rock
drummers) look for headphones with low or medium
impedance (50-100 Ohm), high efficiency (dB/mW) and good
ear isolation. For this purpose we recommend Fostex T 20
(older version is louder) and Sony headphones, for example
MDRV600. Some Sony headphones you might find to fragile
for studio use. MDRV600 are the LOUDEST headphones we
ever heard.
3. If you are concerned more with sound quality (T20 maybe
a little harsh, while Sonys are usually bright- you can
compensate this with Private Q EQ) try some AKGs (not 240
-they sound thin and are not loud), maybe Senheiser or look
for audiophile headphones but choose carefully keeping in
mind 1.)
Don't spend a fortune on headphones, there are good cost
effective headphones out there.
4. We still did not hear all the headphones so maybe you'll
find the best solution. Please let us know!
From our current experience headphones that work best in a
rock and roll studios are T20s.
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Mytek PQ Multichannel System – User's Manual
Operation
I. GAIN STRUCTURE
1. Private Q is a +4dBm system. Its inputs are designed to
accept levels at "0 VU". If you are sending levels considerable
below 0 VU you will not get the volume the system is capable
of producing.
a. When you use Aux sends to combine signals to send to
PQ channels be aware that sending at 0 VU is important.
Check the Aux send VU meters.
b. When you use multitrack returns to send to PQ then you
will probably be sending a good level already as most
engineers are aware of recording signals at around 0 VU.
2. When starting a session with PQ it is important that the
individual Q boxes have their channel and master volumes
set at a "good" level ( at least 12 o'clock ). The tone control
should be set flat and pan pots appropriately to what the
channel is used for.
The maximum gain in each channel is +6dB while unity gain
(0 dB) is at 3 o'clock.
II. WHAT DO YOU SEND TO PRIVATE Q
1. The basic rule of thumb for fold back mixes: send signals
that are off your monitor but pre monitor fader. In other
words send signals that are post multitrack return. If you use
Group Outputs (Busses) to send to the PQ they must be after
the multitrack returns. You should not use the busses that
you are recording to tape as these are off the inputs and there
will be no signal there when you play back the tape.
2. The best sources for signals to send to PQ are:
a. Multitrack return patch points (for individual
instruments)
b. Aux (cue) sends for combined signals (stereo drum mix,
effects mix, etc.)
c. Often it is a good idea to
send the control room mix
to
one
of the stereo channels and
individual instruments to
the other channels. This
way musicians can use the
engineer mix
or update it.
III. TALKBACK
1. We will give an
example with the SSL
console but it is similar in
all consoles:
Talkback to
headphones usually occurs
inside the SSL and is
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Mytek PQ Multichannel System – User's Manual
inserted into Aux sends at the patch point called CUE SENDS
or CUE OUTPUTS not the CUE INSERTS. Any time you use
the Cue Sends as a way to feed some signal to PQ then
talkback to Cues will get to the musicians at some level when
the engineer presses the "Cues" talkback button.
2. A good idea if you have a spare channel on the Q mixer
is to dedicate that channel as a "Talkback" and patch any of
the Cue send/output patch points into it. That way each
musician has a level control for talkback and you are not
relying on them to have any other specific channel turned up.
This does not disable this send as an echo send.
IV. OPERATION
1. Operation of the Private Q mixers is very simple and self
explanatory to you. However you cannot assume that it is
self-explanatory to every musician who will be using it. Some
may have no problems, some may have no idea! A few simple
things that the assistant can do at the beginning of the session
will help:
a. Properly label all Q boxes with artist tape and sharpie.
b. Preset all volume pots at around 12 o'clock, tone controls
flat, and pan pots appropriately. As the engineer starts getting
sounds assistant can go around with a set of headphones and
help the musicians get the mix up. It is a good idea to talk to
each musician for a minute and show them how the thing
works and what is on each channel.
DO NOT EVER HOT PLUG the cue cables !! They carry
power for the boxes and occurring sparks will DAMAGE the
connectors and possibly the boxes. First set up the system,
then power it up. If you have to add a box it is OK to turn off
the system.
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Mytek PQ Multichannel System – User's Manual
Fixed Inatallation
Fixed installation is recommended for a single room studio
where the system is permanently installed. Usually the
distribution rack sits in one place in the studio and is
connected with the patchbay of the console using single 16
pair permanent cable terminated with a Centronics connector.
The patchbay has 12 (or 15 if the remote is used) patchpoints
designated for all 12 inputs of the system. The same type of
installation can be used in a multiroom facility but requires
repeated wiring in all studios.
If there are isolation booths in the studio an elegant solution
is to run a booth extension cable for each booth (see
"Accesories").
Floating System
Floating system is
recommended for
equipment rental
companies and those users
who prefer not to run any
permanent wiring in the
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Mytek PQ Multichannel System – User's Manual
studio. A mixed (combination of floating and permanently
installed) system is recommended for the multiroom studios
where the Private Q is going to be moved between rooms.
Floating system uses existing microphone lines to feed the
signals from the patchbay. Mytek will provide a Centronics to
XLR cable for this purpose. If the system is frequently used
fixed booth extensions are recommended to avoid
inconvenience of running cables through the booth doors. A
flight case is strongly recommended for a floating system (a
must for a rental system); it will keep whole system neat and
clean and Private Q will serve you longer.
Please refer to "Grounding" section for proper grounding of
the system.
Grounding
As most professional
systems the Private Q uses
+4dBm balanced shielded
lines and the grounding is
configured on the "STAR"
principle. This means that
all grounds and shields
meet in one central point
inside the distribution rack
and nowhere else to avoid
ground loops. For instance:
1. All the cables connecting
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Mytek PQ Multichannel System – User's Manual
the PQ mixers have the individual shields connected on both
connectors so it doesn't matter which end goes where.
All shields of all the cables are grounded at the rack side.
Inside each PQ mixer the shields are disconnected from the
ground and the mixer sees the ground reference only through
the main drain wire (called on the schematics GND).
Each PQ mixer chassis is grounded through this drain wire.
2. The second Centronics on each mixer still feeds the shields
through so when few units are daisy-chained all of the
individual cable shields are still grounded at the rack side.
3. Rack chassis is always connected to the central ground
point inside the rack.
The power plug should be lifted if the input ground is
connected to the system ground.
4. In a floating system the shields of the rack's input cable are
connected on both sides (Centronics and pin 1 of all XLRs).
The main drain wire is connected to the central ground point
and has an "alligator" clip on the other side. This clip should
be connected by the user to the studio's ground.
5. In a permanently installed system the shields of the input
cable (except the control wire #15) MUST NOT be connected.
The drain wire however MUST be connected to the main
studio's ground point. It usually has to be extended using an
insulated thick wire.
6. Properly installed system should be absolutely quiet.
7. PQ mixer output XLRs
come from the factory with
pin 1 disconnected. You
may connect it if necessary
by opening the mixer and
soldering the pin to the
designated point on the
printed circuit board.
8. If you hear loud hum in
one channel of a PQ mixer it
is usually not related to
grounding but one of the
channel wires (either hot or
cold) is not making contact.
Try resetting the DL, if it
does not help check the
cable.
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Mytek PQ Multichannel System – User's Manual
Accessories
Mytek provides several
useful accessories for the
Private Q system. They can
be ordered as options or
upgrades:
1. Different types of
snakes. Mytek will
built any custom
snake to your
specifications. For
example: a
Centronics to male
XLRs snake can be
used for feeding a
floating system
through the mike
lines. A Centronics
to Bantams snake
can be used with a
single station and
the small power
supply in the control
room for purposes
such as submixing
etc.
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Mytek PQ Multichannel System – User's Manual
2. Wall mounted Centronics box. Mytek supplies a wall
mounted enclosure for a female Centronics connector.
It is usually used to built the PQ cable booth
extensions or generally to feed the cables through the
walls. (See: "Booth extensions")
3. Mikestand support. Each station has on the bottom a
mike type thread and can be directly screwed ontop of
a mike stand. However it is more convenient to use
this optional clamp. The station can be then mounted
on any stand including music stands and its height
can be easily adjusted.
User Manual ver. 1.0 / Jun 2013
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4. 1/4" jack to 2
speakers. This
simple cable allows
to plug two speakers
to a Private Q
station. The type of
speaker termination
has to be specified
when ordering this
cable.
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Mytek PQ Multichannel System – User's Manual
5. Other accessories. Mytek will built almost any custom
cable or accessorie to your specifications. Please
contact Mytek directly.
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Mytek PQ Multichannel System – User's Manual
Wiring - Centronix connectors
Canal
s2Rs2R+
s2L,s2R S
s2L+
s2Ls1R+
s1Rs1L,s1R S
s1Ls1L+
88+
7,8 S
7+
76+
65,6 S
55+
44+
3,4 S
3+
32+
21,2 S
11+
+27V
GND
-27V
Connector number
1
19
2
3
20
4
21
22
5
23
6
24
7
8
25
9
26
27
10
28
11
29
12
13
30
14
31
32
15
33
16,34
17,35
18,36
+IS HOT
-IS COLD
S IS SHIELD
s1L+ IS CHANNEL "1 STEREO" LEFT SIDE HOT
s1R+ IS CHANNEL "1 STEREO” RIGHT SIDE HOT
GND USES MAIN DRAIN WIRE
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Mytek PQ Multichannel System – User's Manual
Wiring - all other connectors
Headphone Jacks
Output XLRs
1 Is Ground
2 Is Cold
3 Is Hot
Template for your
recalls
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User Manual ver. 1.0 / Jun 2013
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Mytek PQ Multichannel System – User's Manual
Mytek PQ Multichannel System – User's Manual
Warranty
This Private Q system is warranted by Mytek to the original
purchaser, against defects in
workmanship and materials used in manufacture for a period
of one year, from the date of
shipment, except for the cables which are warranted for 90
days.
Faults due to purchaser misuse, unauthorized modifications
or accidents are not covered
by this warranty.
No other warranty is expressed or implied.
Any faulty unit should be sent, shipping prepaid, to the
manufacturer. The serial number of
the unit should accompany any request for service.
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