Nady Wireless Systems are type accepted under FCC rules parts 90, 74 and 15. The
device complies with RSS-210 of Industry & Science Canada. Operation is subject to
the following two conditions: (1) this device may not cause harmful interference and (2)
this device must accept any interference received, including interference that may
cause undesired operation.
U-33B
UHF Bass Wireless Microphone System
DigiTRU Diversity™
NADY SYSTEMS, INC.
6701 Shellmound Street • Emeryville, CA 94608 USA
Tel: 510/652-2411 • Fax: 510/652-5075
www.nady.com
OWNER'S MANUAL
SERVICE
(U.S.) Should your Nady Wireless Microphone System require service, please contact
the Nady Service Department via telephone at (510) 652-2411 or e-mail to
service@nady.com for a Return Authorization (R/A) Number and a service quote (if
out of warranty). Make sure the R/A Number is clearly marked on the outside of the
package and enclose a cashier's check or money order (if not prepaid with a credit
card). Ship the unit prepaid to: Nady Systems, Inc., Service Department, 6701
Shellmound Street, Emeryville, CA 94608. Include a brief description of the problems
you are experiencing.
The warranty card enclosed with this system contains additional valuable
warranty and service information. Keep it in a safe place for future possible
reference. Do not attempt to service this unit yourself as it will void the warranty.
(International) For service, please contact the Nady distributor in your country
through the dealer from whom you purchased this product.
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SPECIFICATIONS
CONTENTS
U-33B OVERALL SYSTEM PERFORMANCE
Frequency Response 30 Hz - 18 KHz, – 3 dB
Dynamic Range 120 dB
Total Harmonic Distortion < 0.6%
RF Carrier Frequency Range UHF, choice of single frequencies from 470-500 MHz
Frequency Stability ±0.005%, crystal controlled
Modulation FM (F3E), ±10KHz normal, ±40KHz max
Operating Range Up to 250 ft. typical (depending on site conditions); up to
500+ feet optimum line-of-sight
U-33B BASS RECEIVER
Reception Mode DigiTRU Diversity™ (Dual Antenna)
Squelch External Control
Controls Power ON/OFF, Volume Control, Squelch (Mute) Adjust
Connectors DC in, 1/4”(6.3 mm) unbalanced phone jack (225 mV/
no load), XLR balanced output (±20 mV/600 Ohm load)
Bass Booster Control +8dB @ 100Hz
LED Indicators Power ON, Diversity A/B, Audio Level and Peak
Unwanted Signal Rejection 60dB image and spurious
Power Requirements DC 18V @ 250mA, AC/DC adapter included
Dimensions (Max.) 1.75" x 7.5" x 8.1" (4.4 x 19 x 20.7 cm)
Weight 1.6 lbs (.73 kg)
Antenna 11.2" (28.5 cm), dual folding antennas
UB-33B BASS TRANSMITTER
Audio Inputs 3.5mm instrument locking mini-jack
Controls POWER, AUDIO ON/OFF
LED Indicator Bi-color, Unit “ON” (green), Low Battery
Alert (orange)
RF Power Out 50mW nominal (maximum allowed by FCC)
Harmonic & Spurious Emissions < –50 dB
Battery AAA Alkaline (2x)
Battery Life 4-5 Hours
Dimensions 3.25” x 2.187”x 1” (8.25 cm x 5.53 cm x 2.54 cm)
Weight 2.25 oz (0.064 kg) without battery
CONTENTS ....................................................................................................... 3
INTRODUCTION ................................................................................................ 3
USING THIS MANUAL ....................................................................................... 3
FEATURES ......................................................................................................... 4
U-33B RECEIVER ................................................................................................ 5
UB-33B BASS WIRELESS TRANSMITTER...............................................................8
SPECIFICATIONS ............................................................................................. 10
SERVICE .......................................................................................................... 11
INTRODUCTION
Thank you for purchasing a Nady U-33B Bass Wireless Microphone System and
congratulations on your choice. The U-33B is loaded with top professional operating
features and is the best performance and price value available in UHF diversity bass
wireless systems.
USING THIS MANUAL
This booklet gives instructions for the operation of the U-33B UHF wireless system.
Please read the instructions for your system completely before operating unit.
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This manual will first list the features of the U-33B and then will take you step by step
to show you how to operate your new system. Included in this manual are system
specifications and servicing information.
3
SYSTEM FEATURES
U-33B BASS RECEIVER
• Specially customized for use with bass guitar transmitter and features Enhanced
Headroom™ for maximized possible clarity and distortion-free audio
• Unique user adjustable Bass Boost™ control for dialing in the exact desired bass
punch and presence missing in standard wireless
• Nady’s proprietary companding circuitry for an industry best 120dB Dynamic
Range, and clearest, most natural sound available
• Clear channel operation on the wide open, unclustered UHF band for interferencefree performance in any application or locale
• DigiTRU Diversity™ for optimum range and dropout protection
• A-B antenna LED indicators
• 5-LED AF display for monitoring audio level
• Unbalanced 1/4" and balanced XLR outputs (for bass amp or direct mixer feeds,
or both). Volume control for unbalanced line output. Fixed level for XLR output
• External Mute (squelch) adjust control
• Half-rack receiver design with folding front panel dual one section telescopic
antennas
• Unique snap-out panel locking tabs for half-rack single receiver or full rack (sideby side) dual receivers mounting with option accessory
• Externally powered by AC/DC power adaptor
UB-33B BASS TRANSMITTER
• Compact small sized
• Removable rubber ducky antenna
• Customized specially for use with U-33B bass guitar receiver. Features enhanced
Headroom™ for maximum possible clarity and distortion-free audio, even with
high output active pickups
• Audio mute switch allows convenient audio muting with the transmitter “ON”
• Bi-color LED status indicatior: “ON” (green), Low Battery Alert (Orange)
• Locking 3.5mm mini-jack provides secure connection for removable instrument
cable
• Convenient, economical operation with two AAA Alkaline or NiMH batteries
18
19
20
22
21
23
17
16
24
4
9
UB-33B BASS WIRELESS TRANSMITTER
U-33B RECEIVER
1. Open the hinged BATTERY DOOR (16) and insert 2 fresh AAA ALKALINE
BATTERIES into the BATTERY COMPARTMENT (17), observing the correct polarity.
Fresh alkaline batteries can last up to 5 hours in use, but in order to ensure optimum
performance, it is recommended that the batteries be replaced after 3-4 hours of use.
2. The UB-33B is provided with a 3.5 mm LOCKING JACK (18) for connecting the
audio input selected. Connect either the INSTRUMENT CORD (24), to secure the
connection, turn the slip ring on the plug clock wise to thread it on the jack. To
unplug, reverse the process. Slip the transmitter into a pocket or CLIP (23) it onto your
clothes or instrument strap.
3. Turn on the UB-33B by sliding the audio AUDIO SWITCH (19) to the OFF position
first then slide the POWER SWITCH (21) to the ON position. The Bi-Color LED
indicator (20) will stay on (GREEN), indicating usable battery strength and that the
transmitter is on. In the case of dead or low batteries, the LED will either not go on at
all or will stay on (ORANGE) continuously, indicating that the batteries should be
replaced with fresh ones. To preserve battery life, turn the transmitter off when not in
use. The A or B Diversity LED indicators (13) on the U-33 receiver should now be lit,
indicating a received signal from the transmitter.
4. Instrument Use
Secure the connection from the GT CABLE (24) by turning the slip ring on the plug
into the transmitter clockwise to thread it on the jack. To unplug, reverse the process.
Plug the 1/4” phone plug into the instrument. When ready to play, slide the AUDIO
SWITCH (19) to “ON” position. Adjust the volume of the receiver as per the Audio
Output Instrument Connection section of the above U-33B receiver instruction.
1. Rackmounting the Receiver
There are 2 options available for rackmounting the U-33B receiver: singly or side-byside with another U-33B receiver.
a. Single mounting: Remove the receiver SIDE MOUNT CLIP (1) from each side of
the receiver (as shown) and slide in the optional ERM-3 RACK EARS (2).
b. Side-by-side double mounting: After removing the SIDE MOUNT CLIPS (1) from
both U-33B receivers, join the two receivers with the EJC-3 JOINING CLIP
(3) and attach the ERM-33 RACK EARS (4) as shown.
(Note: Do not mount
the receiver in a rack directly above an amplifier or other source of high heat –
this could degrade the performance of the U-33B. Always ensure adequate
airflow and heat dissipation in any rack configuration.)
2. Powering the Receiver
Plug the 18V AC/DC ADAPTER (5) provided into the DC INPUT JACK (9) on the back
of the receiver. Then plug the power supply into an AC outlet.
source with 250mA capability can also be used.)
Press the POWER SWITCH (11)
(Note: Any 18V DC
once to turn on the receiver. The POWER ON LED (12) will now light and the receiver
is operational.
3. Antennas
The U-33B receiver is supplied with FOLDING ANTENNAS (15). These should be
extended fully to obtain maximum range. Optimal antenna position is 45 degrees
from the receiver (at 90 degrees from each other). For maximum range, it is always
best to maintain a line of sight (no obstructions) between the receiver antennas and
the transmitter at all times whenever possible.
(Note: The UB-33B is supplied with a removable antenna. It should be operated with
the supplied antenna all times. For optimum operating range, always maintain lineof-sight between the transmitter and the receiver whenever possible.)
8
4. Mute (Squelch) Adjustment
In normal operation, the SQUELCH CONTROL (6) should be set fully clockwise to the
factory preset RF level (Max. Sens.). However, in areas of high RF activity, the squelch
(or mute, as it is sometimes called) may need to be adjusted to compensate for the
adverse conditions in a particular location. If, with the transmitter off, the receiver’s A
or B DIVERSITY LED INDICATORS (13) flicker or stay on, the squelch control should
be turned counterclockwise until the A or B LEDs extinguish. When the squelch is
properly adjusted, the A or B LEDs will only light when the system transmitter is turned
on. Turning the squelch control too far counterclockwise will reduce the range, but
yield a quieter squelch (mute) function. During operation, especially at ranges greater
than 75 feet, one or the other of the A or B LEDs may extinguish briefly. This is
normal—the unit’s DigiTRU Diversity™ reception ensures that the received audio will
not be interrupted. When both LEDs extinguish, the transmitter is out of range for that
given location, and the user should move closer to the receiver to re-establish the
radio link.
5
5. Bass Boost Control
Ordinary wireless systems all sound somewhat thinner (with less bass) than
hardwired. This is due to (1) natural side effects of the noise reduction circuitry
employed, and (2) lack of the high-frequency roll-off normally caused by longer
hardwired cable runs. Adjust the BASS BOOST (15) control to add back low
frequency content in your signal as desired. This is a low-pass filter, with up to 6 dB
of gain, over flat respsonse centered in the 30-300Hz, when turned fully clockwise.
The normal wireless sound is with the control left fully counterclockwise.
6. Connecting the Audio Output
The U-33B receiver provides both a fixed mic level BALANCED AUDIO OUTPUT XLR
(7) and an adjustable line level UNBALANCED AUDIO OUTPUT 1/4" JACK (10). The
level from the UNBALANCED OUTPUT is controlled by the rear panel VOLUME
CONTROL (8).
Insert an audio cord with a 1/4" mono phone plug in the UNBALANCED OUTPUT
JACK (10) on the rear panel of the receiver. Plug the other end of the cord into an
amplifier, effects, or mixing board. Adjust the VOLUME CONTROL (8) on the U-33B
receiver clockwise to maximum rotation, until the volume level is comfortable for your
application. This setting is roughly equivalent to a direct instrument cord connection.
12
11
15
13
15
14
(Note: You can connect both outputs at the same time for added versatility in use. For
example, simultaneously hook up the UNBALANCED AUDIO OUTPUT (10) to your
bass amplifier and the BALANCED AUDIO OUPUT (7) to the FOH mixer.)
(Note: As when making any connection, make sure the amplifier or mixing board
volume is at the minimum level before plugging in the receiver to avoid possible
sound system damage. Also make sure that the phantom power on the input of the
mixer is turned OFF before making connection to the receiver.)
BASS BOOST
UNBALANCED OUT
10
15
2
4
VOLUME
DC INPUT
98 6
3
BALANCED OUT
MUTE
7
5
1
2
1
4
6
7
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