True P2 User Manual
TRUE
systems
P2
analog
2-CHANNEL PRECISION MICROPHONE PREAMPLIFIER
with M/S decoding, Direct Inputs and Stereo Phase Correlation Display
OPERATION MANUAL
Version 1.1
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SAFETY and OPERATING PRECAUTIONS
Important Information:
This symbol indicates the presence of dangerous voltage within the product
enclosure that presents the risk of electric shock injury. When this symbol
appears next to an operation discussed in this manual, only qualified
technical personnel should perform that operation.
This symbol indicates important operating or maintenance instructions that
should be read carefully. Failure to observe these instructions could result in
damage to the product or other property.
WARNINGS:
To reduce the risk of electric shock injury, do not remove the top cover or rear
panel. Uninsulated dangerous voltage exists within the product’s enclosure.
Refer servicing to qualified personnel.
Do not defeat the earth ground connection in the AC power cable. Tips for eliminating
ground loops are discussed in the “TROUBLESHOOTING” section of this manual.
Do not operate this unit in the presence of rain, liquids or condensing moisture. Liquid
entering the product enclosure presents the risk of electric shock injury. Do not touch
the AC plug or enclosure with wet hands.
Do not defeat intended AC power connection polarization.
Do not use a damaged or excessively worn cord to connect this unit to AC power.
CAUTIONS:
Severe damage may be caused to your unit if the AC voltage setting is not correct
for the AC power available in your area. The voltage setting is visible on the red
selector switch on the rear panel. See section on “AC Mains Connection” for instructions
on selecting the proper AC voltage setting. If you are unsure about this, contact your
dealer or TRUE Systems. Product failure caused by improper voltage setting will not
be covered under warranty.
Do not operate this unit in the presence of rain, liquids or condensing moisture. Liquid
entering the product enclosure is likely to cause performance degradation or failure.
Failures due to moisture entering the enclosure will not be covered under warranty.
Should liquid spill on the unit, immediately disconnect it from the AC power source and
return it to your dealer or TRUE Systems for servicing.
This product is designed to operate in an ambient temperature environment not to
exceed 50C (122F). Please ensure that this unit is mounted in such a way that vents
are not blocked and ambient temperature does not exceed 50C.
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CERTIFICATIONS
FCC Notice
This product complies with the limits for a Class A digital device, pursuant to Part 15 of
the FCC rules. These limits are designed to provide reasonable protection against
harmful interference when operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if not installed and used
in accordance with instructions in this manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area may cause harmful
interference to radio communications – which can be determined by turning the product
off and on. If this product does cause harmful interference, the user should try to correct
the interference by one or more of the following measures:
1. Re-orient or relocate the receiving antenna.
2. Increase the separation between this product and the receiver.
3. Connect this product to an outlet on a different circuit from that to which the receiver
is connected.
4. Consult the dealer or an experienced radio/TV technician for help.
NOTE: Modifications to the product not expressly approved by Sunrise Engineering and
Design Inc. could void the user’s authority to operate the equipment.
Declaration of Conformity – CE
Sunrise Engineering and Design Inc. hereby declares the TRUE Systems P2
2-channel microphone preamplifier to be in material conformity with the following
directives and related standards:
73/23/EEC – Low Voltage Directive
89/336/EEC – EMC Directive
EN60065:1998
EN55103-1: 1997
EN55103-2: 1997
Technical files are maintained at corporate headquarters of Sunrise Engineering and
Design Inc., 1634 S. Research Loop, Suite 110, Tucson, Arizona 85710, USA.
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Owner’s Record
We recommend that you record the following information for reference in the event that
you need to contact TRUE Systems for technical support or repairs. Please return
your completed Warranty Card today.
Serial No._____________________ Purchase Date ______________________
Dealer _____________________________________________________________
Address ____________________________________________________________
Phone _______________________
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OPERATION MANUAL
CONTENTS
SAFETY and OPERATING PRECAUTIONS..............…… … … ....… ....2
CERTIFICATIONS… ..… … … … … … … … … … … … … … … … … … … … … … ...3
Owner’s Record… … … … … … … … … … … … … … … … … … … … … … … … … .3
Table of Contents… … … … … … … … … … … … … … … … … … … … … … … … .4
INTRODUCTION… .......................................................................… … … … ..5
PRODUCT OVERVIEW…..................................................................… … ..5
UP-AND-RUNNING IN A HURRY................................................… … … .6
INSTALLATION..........................................................................… … … … … 7
Unpacking and Inspection… … … … … … … … … … … … … … … … … … ..7
Mounting… … … … … … … … … … … … … … … … … … … … … … … … … … ..7
Ventilation… … … … … … … … … … … … … … … … … … … … … … … … … … 7
OPERATION....................................................................................… … … ..8
Connections… … … … … … … … … … … … ..… … … … … … … … … … … … .8
AC Mains Connection… … … … … … … … … … … … … … … … … … .8
Microphone Connection… … … … … … … … … … … … … … … … … .8
Output Cable Connection… … … … … … … … … … … … … … … … ..9
A Word About Cables… … … … … … … … … … … … … … .… … … … … … .9
Front Panel Controls… … … … … … … ..........................… .........… … … .9
Direct Inputs… … … … … … … … … … … … .....................................… ...12
More About M/S Decoding ...................................................… … … .12
Stereo Phase Correlation Display................................… … … .........13
DESIGN APPROACH.................................................................… … ..… 15
SPECIFICATIONS..........................................................................… . … 15
TROUBLESHOOTING..… … ........................................................… … … 16
REGISTRATION and WARRANTY… .… … … ......................… … … … .17
SERVICE and SUPPORT INFORMATION… ...… … … … … … … … … 18
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OPERATION MANUAL
INTRODUCTION
The P2
necessary for the most critical direct tracking and live sound applications. It includes a
unique combination of functions that make it useful as a complete input system for
standalone or PC-based recording systems. And, the P2
that provide the serious musician or recordist with useful tools to get the best sound
more quickly and easily.
We appreciate the confidence you have placed in TRUE Systems by purchasing this
product. Please feel free to contact us with questions or comments. And, we always
appreciate hearing about successful projects you have completed.
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is designed to provide the detailed, transparent sonic performance
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has special features
OVERVIEW
In addition to our acclaimed TRUE preamps, P2
inputs (DI’s) that offer sonic performance previously thought to be available only with
dedicated, high-end DI’s. You’ll get incredible articulation and control for electric bass,
detail and smoothness for stringed instruments and keyboards. And, there’s even an
impedance modification option to help you get the most out of your vintage Strat!
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features two instrument direct
Even with today’s emphasis on powerful digital audio platforms and software plug-ins to
perform signal-processing tasks, the issue of microphone placement remains a critical
variable in determining the quality of your final sonic product. The P2
incorporates powerful features that assist you in achieving optimum microphone
placement for nearly any stereo recording situation. One of these features is a
selectable M-S (Mid-Side) decoder which provides creative spatial control that is useful
in attaining an exciting stereo image with minimum effort and microphone repositioning.
The M-S microphone technique can be employed effectively in a wide variety of
circumstances, from classical ensemble, to drum kit overheads, to solo vocal or
instrument – whenever accurate capture of the performance and its acoustical space is
desired. M-S micing also eliminates the “hole-in-the-middle” effect.
And, whether using M-S, X-Y or other stereo mic techniques, our Stereo Phase
Correlation Display can assist in positioning the microphones for a rich stereo image.
In addition to the previously mentioned features, the P2
Dual Gain Ranges - to accommodate a wide range of microphone sensitivities
Selectable High-Pass Filters - to minimize breath and wind noise
Relay Signal Switching - to provide the cleanest possible signal path
Polarity Reverse - to correct polarity inversions caused by mic position or cable
wiring variations
XLR and TRS output connectors - for easy connectivity
Phantom Power (48V)
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includes:
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P2
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MID
SIDE
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OPERATION MANUAL
UP-AND-RUNNING IN A HURRY
1. Read the “SAFETY and OPERATING PRECAUTIONS”on page 2 of this manual.
2. Check the voltage selector on the rear panel to make sure it is set for the
appropriate AC mains voltage in your area.
3. After making sure the main power switch is off, connect the AC power cord.
4. Connect output signal cables between P2
your recorder, mixer, signal processor, etc. Use either the 1/4” TRS or XLR balanced
output connectors. See the section “Connections” for wiring details.
5. Connect mic cables to MIC 1 and MIC 2 as needed.
6. Turn on the AC power.
7. Select 48V and 180polarity) buttons as appropriate on each channel.
8. Adjust Channel 1 and Channel 2 gain controls for adequate signal level as indicated
on the P2
is connected.
If you’re using the DI’s for electric instrument input:
1. Connect your instrument cables to DI-1 and/or DI-2 on the front panel. Any
microphones plugged into MIC1 or MIC2 will be automatically de-selected.
NOTE: DO NOT use TRS plugs for these inputs as the DI will not function correctly.
2. Select 180polarity) buttons as appropriate.
3. Adjust Channel 1 or Channel 2 gain controls for adequate signal level as indicated
on the P2analog level indicators or on the level indicators of the device to which it is
connected.
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level indicators or on the level indicators of the device to which it
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and the analog line level inputs of
If you’re using the M-S Decoder:
1. Connect the cardioid or omni MID mic to MIC 1 input.
2. Connect the figure 8 SIDE mic to MIC 2 input. Face the SIDE mic toward the left
side of the sound field (perpendicular to the axis of the MID mic). See Figure 1.
3. Press the M-S button to select the Mid-Side Mode. “Left” signal is routed to Channel
1 output. “Right” signal is routed to Channel 2 output.
4. Adjust the Channel 1 gain control for adequate mono signal level.
5. Adjust the Channel 2 gain control to vary the image width as desired.
6. See the section “More About M-S Decoding” for more information.
Figure 1
M-S microphone orientation
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