Samson QV User manual

QE AEROBICS MIC
QV VOCAL MIC
®
PM4 Phantom
power adaptor
AEROBICS AND VOCAL
HEADSET MICROPHONE
PM4 PHANTOM POWER ADAPTOR
OWNERS MANUAL

© Copyright 1998 Samson Technologies Corp.

3
CONTENTS
INTRODUCTION 4
FEATURES 6
USING YOUR QE/QV HEADSET 8
SPECIFICATIONS 14

4
INTRODUCTION
Thank you for purchasing the Samson QE/QV Headset Microphone with the
PM4 phantom power adaptor.These professional hands-free microphones are
specially designed for performing musicians and dancers, sportscasters and
aerobics instructors (the QE model is water resistant and is optimized for aero-
bics use and high-humidity environments). Manufactured with extreme care and
the highest quality components, they deliver an exceptionally clear, articulate
sound, with superior rejection of background noise.The QE/QV Headset along
with the PM4 phantom power adaptor are well-suited for any vocal amplifying
situation.
In this manual, you’ll find a more detailed description of the features of your
QE/QV Headset, as well as instructions for using your QE/QV Headset with the
PM4 phantom power adaptor, and complete specifications.You’ll also find a war-
ranty card enclosed—don’t forget to fill it out and mail it in! This will enable you
to receive online technical support and will allow us to send you updated infor-
mation about other Samson products in the future.

5
INTRODUCTION
Should your QE/QV Headset or PM4 ever require servicing, a Return
Authorization number (RA) must be obtained before shipping your unit to
Samson.Without this number, the unit will not be accepted. Please call Samson
at 1-800-3SAMSON (1-800-372-6766) for a Return Authorization number prior
to shipping your unit. Please retain the original packing material and, if possible,
return the QE/QV Headset in its original carton and packing materials.
Samson Technologies Corp.
575 Underhill Blvd.
P.O. Box 9031
Syosset, NY 11791-9031
Phone: 1-800-3-SAMSON (1-800-372-6766)
Fax: [phone]

6
FEATURES
The Samson QE/QV Headset utilizes state-of-the-art headset microphone tech-
nology and is engineered to the finest detail. Here are some of its main features:
•Lightweight, low visibility design for unobtrusive use.
•High quality electret condenser element delivers high output and exceptional
sound quality.
•Full range frequency response for clear, crisp audio.The QV Headset is vir-
tually flat to 10kHz, while the QE Headset utilizes a midrange “presence”
peak for optimum reproduction of speech.
•Tight hypercardioid polar pattern (in the QV) and bi-directional noise cancel-
lation design (in the QE) reduces background noise, minimizes feedback
problems and effectively rejects signals not originating directly in front of the
mic capsule.
•QE Headset includes internal radio frequency (RF) suppression, making it
suitable for use in high-RF urban areas.

7
FEATURES
•Microphones are molded to high quality gooseneck booms constructed of
brass over stainless steel wire with matt black polyurethane covering.
Compliant molding reduces microphone handling noise, and the booms
bend smoothly, hold their shape and are rated to withstand over a thousand
90°bends without degrading.
•Both the QV and QE Headsets are moisture protected, and the QE is water
resistant, making it the microphone of choice for aerobics instruction or in
other high-humidity environments.
•Both the QV and QE Headset microphones terminate with a P3 connector
which plugs into to the PM4 phantom power adaptor.
•The PM4 phantom power adaptor is used to supply the QE/QV microphone
with phantom power, while transforming the impedance from high to low to
compensate for longer cable runs.

As shown in the illustrations below, the correct way to wear your QE/QV
Headset is over the ears, as you would wear a pair of eyeglasses.
The QE/QV Headset is specially designed to be used up close, so be sure to
adjust the microphone to be directly in front of your lips, as shown in these illustra-
tions. Although it generates significantly less handling noise than most other head-
sets (due to its compliant molding), it should be left in one position during use.To
avoid feedback problems, take care not to cover the mic capsule with your hand.
8
SAMSON
QV
MIC
SAMSON
QE
MIC
USING YOUR QE/QV HEADSET

9
USING YOUR QE/QV HEADSET
Slide the foam windscreen over the microphone ,as shown in the illustration on
the previous page, to eliminate wind noise.
The PM4 phantom power adaptor with its special interface, enables a mixer to
provide phantom power to condenser, piezo or electric microphones.The PM4
converts high impedance (50 k –10meg ohm) to low impedance (600 ohms)
allowing long cable runs without noise and gain loss.
Connect the P3 plug from your QE/QV Headset into the locking input of the
PM4. Connect an XLR cable from the PM4 to the input of your mixer. Clip the
PM4 to your belt loop or some other part of your clothing, as in the photos on
the box cover, as not to cause strain by pulling on the wire coming from the
headset.You should also select a thin, lightweight XLR cable for this interface.

Every microphone has a characteristic polar pattern that determines how well
it accepts or rejects signals coming from various areas around the microphone.
A type of design which is particularly good at rejecting background noise is the
bi-directional polar pattern uti-
lized by the QE Headset, as
shown in the illustration on the
left.
10
USING YOUR QE/QV HEADSET
0°
-10dB
-20dB
90°
180°
270°
QE Headset Polar Pattern
(measured at 1 kHz)

Omnidirectional mics accept all signals regardless of wherever those signals
originate (in front of the mic, behind it, to the side, etc.). In contrast, directional
cardioid mics are specifically designed to accept mostly signals coming from
directly in front, and to reject
signals coming from behind or
from the side.The most
extreme variation of cardioid is
the hypercardioid pattern uti-
lized by the QV Headset (as
shown in the illustration on the
right); this yields maximum
rejection of signal coming from
any direction other than directly
in front of the mic.
11
USING YOUR QE/QV HEADSET
0°
-10dB
-20dB
90°
180°
270°
QV Headset Polar Pattern
(measured at 1 kHz)

12
USING YOUR QE/QV HEADSET
In the QE Headset, three noise cancelling modes operate together to provide
20 - 30 dB of noise reduction: First, the small size of the mic capsule and the
short distance between front and rear ports reduces the sensitivity at 1 kHz to
far field noise by 15 dB compared to the close talking response. Secondly, as
shown in the frequency response graph below, noise at lower frequencies is
additionally attenuated. And,
finally, the bi-directional polar
pattern reduces signal coming
from a 90°angle by 20 dB
more (and random signal by 5
dB more) compared to signal
originating from directly in front
of the mic capsule.
The frequency response of
the QV Headset (which is virtu-
ally flat across the entire audible range) is shown in the illustration on the follow-
ing page:
-70
-60
-55 -35
-40
-50
100 Hz 500 1000 2000 5000 10000 20000
-75
-65 -45
-55
CLOSE TALKING (1cm)
FAR FIELD (1m)
dB (re 1 Volt/Pascal)
dB (re 1 Volt/microbar)
QE Frequency Response

13
USING YOUR QE/QV HEADSET
Because of their polar patterns, frequency response, and noise cancellation
design, both the QV and QE Headsets excel in environments where there is a
good deal of unwanted ambient
sound—they deliver those sig-
nals originating directly in front
of the mic capsule itself while
rejecting those that originate
from other directions.
The polar pattern also deter-
mines how prone a particular
mic is to inducing feedback.
Feedback is that characteristic
nasty howling sound that occurs
when a mic is placed too close to a loudspeaker—the signal from the loud-
speaker is fed into the mic, then into the loudspeaker, then into the mic, over
and over again until an oscillating tone is generated. Because the QE/QV
Headsets are so good at rejecting signal not coming from directly in front of the
mic, you’ll find that their use greatly minimizes feedback problems.
-80
-70
-60 -40
-50
-60
100 200 500 1000 2000 5000 10000
0°
125°
dB (re 1 Volt/Pascal)
dB (re 1 Volt/microbar)
QV Frequency Response

14
SPECIFICATIONS
QE and QV
Generating Element: Back electret condenser
Polar Pattern
QE (water-resistant): Bi-directional noise cancelling,
QV: Hypercardioid
pressure gradient type
Mounting system: Adjustable headband and gooseneck
Sensitivity
QE: 80 mV @ 114 dB SPL
QV: 70 mV @ 114 dB SPL
Max.SPL: 145 dB
Weight: 1.92 oz. •54.4 grams

15
SPECIFICATIONS
PM4 (For use with QE/QV Headset Mics)
Frequency Response (+-0, 1.5dB): 20Hz—20kHz
Connectors
Input: TA3M Switchcraft
Output: XLR Male (gold plated)
Operating Voltage: 12 Vdc through 48 Vdc
Impedance (@ 1kHz nominal)
Input: 2kΩ
Output: 600Ωbalanced (transformer coupled)
Input Wiring
Pin 1: GND
Pin 2 Audio
Pin 3: + Phantom
Output Wiring
Pin 1: GND
Pin 2 Hot +
Pin 3: Cold –
Casing: Zinc, die cast
Stainless steel belt clip
Dimensions
Length: 3.7″•93.75mm
Diameter: 0.86 •22mm

16
SPECIFICATIONS
FLEXIBLE GOOSENECK
FLEXIBLE CABLE
FLEXIBLE SHIELD
WHITE (—) RED (+)
REAR VIEW
FRONT VIEW
8.5″ / 220mm
.24″/ 6mm
.95″
24mm
.4″/ 10mm
QV Dimensions
FLEXIBLE GOOSENECK
FLEXIBLE CABLE
SHIELD (-)
WHITE (—)RED (+)
REAR VIEW
FRONT VIEW
11″/ 278mm
.35″/ 9mm
1″
26mm
.47″/ 12mm
QE Dimensions

17
SPECIFICATIONS
Q'TYMODEL
NO DESCRIPTION SPECIFICATION
Q'TY
PM-4 1
10
9
8
7
6
5
4
3
2
1
CASE
PCB
TRANS
CASE SCREW
CONNECTOR HOLDER
3P CONNECTOR ASS'Y
CLIP
SET SCREW
SET SCREW
RECEPTACLE ASS'Y 1
1
1
2
1
1
1
1
2
1
M2x2
M2xL4(F/H)
TB3M
SCREW
CLIP
SC GOLD
1 2 3 4 5 6
8 9 10
7
7
2.84″/ 72mm
3.72″/ 94.5mm
.75″/ 19mm.875″/ 22.25mm
PM4 PHANTOM MICROPHONE ADAPTER
FOR USE WITH QE AND QV HEADSETS
18VDC TO 48VDC
PM4 Mechanical

18
SPECIFICATIONS
C4
RED
C2
BLK
R3
C1
PM4
R2
ORN C5
R1
R4
Q1
D1
WHT
D2
12
C3
2
31
TB3M
YEL
GRN BLU
RED
BLK
3
4
5
1
2
Trans
XLR3 1
Trans 4
Trans 3
XLR3 3
Trans 1
TB3M 2
TB3M
2
1
Trans
3
2
XLR3
1
Trans 5
PATTERN SILK PRINT
TB3M 3
PM4 Circuit board

Samson Technologies Corp.
575 Underhill Blvd.
P.O. Box 9031
Syosset, NY 11791-9031
Phone: 1-800-3-SAMSON (1-800-372-6766)
Fax: [phone]
www.samsontech.com