401x QUAD
4-Channel VHF Wireless Microphone System
OWNER’S MANUAL
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401x QUAD Receiver
1. Powering the Receiver
Plug the 16V AC/DC ADAPTER (1) provided into the DC INPUT JACK (11) on the back of the receiver.
Then plug the power supply into an AC outlet. [Note: Any 16V DC source with 800mA capability
can also be used.]
Turn VOLUME CONTROL (6) for all four channels counterclockwise to mimimum located on the front
of the receiver. Once the receiver is connected to a power source, press the POWER SWITCH (3) to
ON position. The POWER ON LED (4) indicator will light up.
The TX LED INDICATOR (7) on the front panel of the receiver will not light up until one or more of the
four channels is receiving a signal from your system’s transmitter.
2. Antennas
The ANTENNAS (2) assembly consists of two antennas. Connect antennas into the ANTENNA
JACKS (5) on the front of the receiver. Extend the antennas fully to obtain maximum range.
Position ANTENNAS (2) at 45 degrees from the horizontal; 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 whenever possible.
3. Mute (Squelch) Adjustment
In normal operation, the MUTE CONTROL (9) should be set fully counterclockwise to the factory preset
minimum RF level of 1μV for maximum sensitivity. Doing so sets each receiver for maximum range.
However, in areas of high RF activity, the mute (or squelch, 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, its corresponding LED on the receiver front panel flickers or stays on, the MUTE CONTROL (9)
should be turned clockwise until the LED extinguishes. For each of the four channels, when the
Mute is properly adjusted, the corresponding LED will light only when the system’s transmitter is
turned on. Turning the MUTE CONTROL (9) too far clockwise will result in reduced range, but yield a
quieter signal during dropouts or at the end of the operating distance range.
4. Connecting the Audio Output
The output stage of each channel and the separate four channels mixed output of the 401X QUAD
are all configured for adjustable unbalanced LINE and fixed balanced XLR line or microphone audio
outputs. The adjustable unbalanced ¼” mix out is a low level LINE with an output impedance of
600 ohms. The individual fixed level balanced XLR out can be configured as high level line out with
11k ohms output impedance or microphone level out with a 600 ohms load impedance.
For each channel you wish to use, insert an audio cord with a balanced female XLR plug into its
AF OUTPUT (10) jack on back of the receiver. Plug the other end of each cord into your amplifier, effect
or mixing board. Adjust volume on your mixing board so that no audio distortion in present when
amp or mixer is set at its usual level. [Note: To prevent possible undesired noises during use, leave
the volume controls of unused channels (with the corresponding transmitter off) turned off in the
amp or mixer. The audio should only be “live” if the transmitter is on.]
If you want to use the 401X QUAD as it own mixer (your amplifier, effect or mixing board should
have 12dB or more gain select on), you can connect to the MIX AF OUTPUT (8) which provides a
mixed line output of up to all four channels, with the relative volume of each channel in the mix
determined by that channel’s VOLUME CONTROL (6).
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a. Instrument Connection (using the WGT instrument transmitter)
Insert an audio cord with a ¼” mono phone plug in the AF OUTPUT JACK (8) on the rear panel of
the receiver. Plug the other end of the cord into amplifier, effect or mixing board. Adjust the
VOLUME CONTROL (6) on the 401X QUAD clockwise to about ¾ rotation until the volume level is
comfortable for your application. This setting is roughly equivalent to direct instrument cord
connection. Turning the volume up to maximum will provide 4dB gain over a cord.
b. Microphone Connection (using the WLT transmitter with either a headset
or lavalier microphone or the WHT handheld microphone transmitter)
Insert an audio cord with a ¼” mono phone plug in the AF OUTPUT JACK (8) on the rear panel of
the receiver. Plug the other end of the cord into amplifier, effect or mixing board. Adjust the
VOLUME CONTROL (6) on the 401X QUAD clockwise to about ½ MAX and adjust the volume
control until the volume level is optimal. If the volume control is set too high, you may overload
your mixer or amp.
Since your 401X QUAD is comprised of four separate and independent XLR output channels, it
can be used with either one, two, three or four channels operating. Simply turn your mixer volume
control of any channel which you are not using to minimum. If the mix line out is used, just turn
down the 401X QUAD receiver’s volume controls.
16V AC/DC Adapter
Antennas
5
3
4
6
7
8
9
10
11
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WHT Handheld Microphone Transmitter
1. Unscrew the BATTERY COMPARTMENT COVER (12) and remove, exposing the BATTERY HOLDER (13).
Insert a fresh 9V ALKALINE BATTERY (14), observing the correct polarity as marked, and screw
the cover back on to the microphone. Make sure the cover is screwed on completely. A fresh
alkaline battery can last up to 15 hours in use, but in order to ensure optimum performance, it is
recommended that you replace the battery after every ten hours of use.
2. Turn on the WHT by sliding the OFF/STANDBY/ON SWITCH (15) to the STANDBY position
(transmitter on, audio muted) or the ON position (transmitter and audio both on). The BATTERY
INDICATOR LED (16) will give a single quick flash, indicating usable battery strength. In the case of
a dead or low battery, the LED will either not go on at all or will stay on continuously, indicating
that the battery should be replaced with a fresh one. To preserve battery life, turn the transmitter
off when not in use.
3. The microphone is now ready to use. The TX LED INDICATOR (7) on the 401X QUAD receiver should
now be lit, indicating a received signal from the transmitter. When ready to speak, slide the
transmitter switch to the ON position. Adjust the volume of the receiver as per the Audio Output
Microphone Connection section of the above 401X QUAD receiver instructions. The AF LEVEL LED
DISPLAY (7) on the 401X QUAD receiver will light up as if the input signals are getting stronger.
Occasional flickering on and off during use of the LED indicator is normal. However, if the LED
stays on continuously, it means the signal is too loud and there is the possibility of overload
distortion. If this occurs, back off from the microphone until the red LED indicator only flickers
on peaks.
[Note: Observe care in selecting PA volume, transmitter location and speaker placement
so that acoustic feedback (howling or screeching) will be avoided.]
[Note: Microphone elements can easily be destroyed by the buildup of salts and minerals from
perspiration and saliva. It is good practice to put a windscreen on the mic element at all times
to protect it.]
16
15
13
14
12
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WLT Lavalier/Lapel or Headworn Microphone
Bodypack Transmitter
1. Snap open the BATTERY COMPARTMENT (17) and insert a fresh 9V BATTERY (18), observing the
correct polarity. Close the compartment.
2. The WLT is provided with a 3.5 mm LOCKING JACK (19) for connecting the microphone. Plug
in either the LAVALIER/LAPEL (20) or the HEADWORN MICROPHONE (21), as supplied. To secure the
connection, turn the metal slip ring on the plug clockwise to thread it on to the jack. To unplug,
reverse the process. Slip the transmitter into a pocket or clip on to your clothes. To use the
lavalier mic, attach it at chest level. Do not place too close to the mouth—a distance of about
six inches usually works best. To use the headworn mic, place it on the head and adjust the mic
boom so that the mic is about one inch to the side of the front of the mouth.
[Note: The lavalier or headworn mic wire is also the transmit antenna, and rolling up or
shortening the wire may reduce the effective operating range. Extend the wire fully during
use and keep it as straight as possible.]
3. Turn on the WLT by sliding the OFF/STANDBY/ON SWITCH (22) to the STANDBY position (transmitter
on, audio muted) or the ON position (transmitter and audio both on). The BATTERY INDICATOR LED
(23) will give a single quick flash, indicating usable battery strength. In the case of a dead or low
battery, the LED either will not go on at all or will stay on continuously, indicating that the battery
should be replaced with a fresh one.
4. The microphone is now ready to use. The TX LED INDICATOR (7) on the 401X QUAD receiver
should now be lit, indicating a received signal from the transmitter. When ready to speak, slide
the transmitter switch to the ON position and adjust the volume of the receiver as per the
Audio Output Microphone Connection section of the above 401X QUAD receiver instructions.
The AF LEVEL LED DISPLAY (7) on the 401X QUAD receiver will light up as if the input signals are
getting stronger. Occasional flickering on and off during use of the LED indicator in this display is
normal, however if the LED stays on continuously, it means the signal is too loud and there is the
possibility of overload distortion. Re-position the microphone farther from the source or adjust
the AUDIO INPUT LEVEL CONTROL (24) until the red LED indicator flickers only on the loudest inputs.
[Note: Observe care in selecting PA volume, transmitter location and speaker placement so that
acoustic feedback (howling and screeching) will be avoided. Please also observe the pickup
patterns of the microphone selected: omnidirectional mics pick up sound equally from all
directions and are prone to feedback if not used carefully. Unidirectional mics are more resistant
to feedback, but pick up sound sources best that are directly in front of the mic. Also, mics that
are farther from the sound source, such as lavaliers, require more acoustic gain and thus are also
more prone to feedback than close-source mics such as handheld or headworn mics that are
used close to the mouth.]
[Note: Microphone elements can easily be destroyed by the buildup of salts and minerals
from perspiration and saliva. It is good practice to put a windscreen on the mic element at
all times to protect it.]
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Opening Battery Compartment
17
18
19
24
23
22
21
17
20
Headworn
Microphone
7
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WGT Instrument Bodypack Transmitter
1. Snap open the BATTERY COMPARTMENT (25) and insert a fresh 9V BATTERY (26), observing the correct
polarity. Close the compartment. The WGT-15 is provided with a 3.5 mm LOCKING JACK (27) for
connecting the INSTRUMENT CABLE (28). To secure the connection, turn the metal slip ring on the
plug clockwise to thread it on to the jack. To unplug, reverse the process. Slip the transmitter
into a pocket or clip on to your clothes or instrument strap.
[Note: As the cord to the instrument also serves as the antenna, be sure to extend it fully for
maximum range. Rolling up or shortening the cord may reduce the effective operating range.]
2. Turn on the WGT by sliding the OFF/STANDBY/ON SWITCH (29) to the STANDBY position (transmitter
on, audio muted) or the ON position (transmitter and audio both on). The BATTERY INDICATOR LED
(30) will give a single quick flash, indicating usable battery strength. In the case of a dead or low
battery, the LED either will not go on at all or will stay on continuously, indicating that the battery
should be replaced with a fresh one.
3. The WGT transmitter is now ready to use. The TX DISPLAY LEDs (7) on the 401X QUAD receiver
should now be lit, indicating a received signal from the transmitter. Adjust the volume of the
receiver as per the Audio Output Instrument Connections section of the above 401X QUAD
receiver instructions. The AF LEVEL LED DISPLAY (7) on the 401X QUAD receiver will light up as if
the input signals are getting stronger. Occasional flickering on and off during use of the LED
indicator is normal. However, if the LED stays on continuously, turn down the instrument volume
control or noticeable distortion may result. For ultra high-gain instrument sources such as active
bass pickups or even extra hot guitar pickups, an attenuation pad may be required to eliminate
unwanted distortion.
[Note: The INPUT LEVEL CONTROL (31) is not operable because it is preset and switched internally
at the factory to instrument GT input mode. The control is only used for Headworn Mic (HM)
and Lavalier (LT) input modes.]
[Note: Scratchy noises can sometimes occur when some electric guitars/basses with dirty pots
or connections are used with any wireless system. For this reason, the supplied INSTRUMENT
CORD (28) has a factory installed capacitor inside the ¼” plug. This capacitor provides first order
filtering of the RF signal from the cord into the guitar and eliminates virtually all scratchy noises.
Should your equipment still produce scratchy noises, we suggest these steps to eliminate them:
1) Make sure all guitar volume and tone pots are clean and all contacts are solid—
this is very important.
2) Provide extra filtering with a 220 pF capacitor soldered across the hot to ground terminals
of the guitar’s volume and tone pots.)
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Opening Battery Compartment
25
26
27
31
30
29
25
28
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speCIfICaTIons
Overall SyStem PerfOrmance
Frequency Response ...................................................................................................30-18KHz (-3dB)
Dynamic Range........................................................................................................120dB (20-20KHz)
Total Harmonic Distortion ............................................................................................. <0.5% (typical)
RF Carrier Frequency Range................................................. 170-230MHz (Factory installed Channels)
Frequency Stability ............................................................................... +/- 0.005%, crystal controlled
Modulation..............................................................................FM (F3E), +/-15KHz nor,+/-30KHz max
Operating Range ........................................ 250 feet typical — up to 500+ feet optimum line-of-sight
tranSmItterS
Audio Inputs
WHT .......................................................................... Nady DM-10D neodymium dynamic cartridge
WLT/WGT..................................................................... 3.5mm mono locking jack for connecting to
omni or unidirectional lavalier mic or unidirectional
headworn mic, with phantom power (WLT);
or connecting to instrument cable (WGT)
Controls
WHT .........................................................................................................OFF/STANDBY/ON switch
WLT/WGT....................................................................OFF/STANDBY/ON switch, input level adjust
LED Indicator......................................................Unit “ON” (single flash), Low Battery Alert (steady)
RF Power Out........................................................................................50mW (Max. allowed by FCC)
Harmonic & Spurious Emissions.................................................................................................<-40dB
Battery...............................................................................................................................9V Alkaline
Battery Life...................................................................................................................Up to 20 hours
Dimensions
WHT ....................................................................................... 9.5” X 1.4” diameter. (24.1 X 3.5 cm)
WLT/WGT............................................................................4.1” X 2.4”X 0.8” (10.4 X 6.1 X 2.0 cm)
Weight (w/o battery)
WHT .............................................................................................................................6.9 oz (193 g)
WLT/WGT.....................................................................................................................3.6 oz (101 g)
receIver
Controls ...................................................................... Power ON/OFF, volume control, mute control
Connectors.............................................................. 1 unbalanced adjustable mixed (all four channel)
¼” T-S audio output jack. Line level, 600 ohms
4 balanced fixed level XLR. #1=GND, #2-3=signals
Line/Mic level, 11k/600 ohms
Receiver.................................................................... 2.1 mm barrel-type DC input jack (tip=positive)
LED Indicators ................................................................. 1 Power ON LED, 4 AF LED, 4 TX ON LED
Dimensions ........................................................................... 1.75” x 7.5” x 16.5” (4.4 x 19 x 42 cm)
Weight ............................................................................................................................4.5 lbs (2 Kg)
Power Requirements............................................... 16V @ 800mA, nominal, AC/DC adapter supplied
Antenna Connectors............................................................................... Dual female BNC connectors
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seRvICe InfoRMaTIon
In the U.S. If you are experiencing operational problems with your system, please refer to the Support page at
Department at (510) 652-2411 for a Return Authorization (R/A) Number and service quote (if out of warranty).
Make sure the R/A Number is clearly marked on the outside of the package that you are returning.
If your unit is out of warranty, please enclose a cashier’s check or money order (or pay by credit card)
per instructions by the Nady Service Department. Ship your unit prepaid to: Nady Systems, Service
Department, 6701 Shellmound Street, Emeryville, CA 94608. Include a brief description of the problem you
are experiencing. For service of a unit under warranty, please follow the instructions in the following section.
Outside the U.S. For service and warranty matters please contact the Nady distributor in your country
through the dealer/store from which you purchased this product.
Do not attempt to service this unit yourself as it can be dangerous and will also void the warranty.
one YeaR lIMITeD WaRRanTY
Nady Systems, Inc. warrants to the original consumer purchaser that the above unit is free from any defects in
material or workmanship for a period of one year from the date of original retail purchase. If any such defect is
discovered within the warranty period, Nady Systems, Inc. will repair or replace the unit free of charge, subject
to verification of the defect or malfunction upon return to Nady Systems.
To the extent permitted by law, any applicable implied warranties, including warranties of merchantability
and fitness are hereby limited to one year from the date of purchase. Consequential or incidental damages
resulting from a breach of any applicable express or implied warranties are hereby excluded. This warranty
is in lieu of all other agreements and warranties, general or special, express or implied and no representative
or person including a Nady dealer, agent, or employee is authorized to assume for us any other liability in
connection with the sale or use of this Nady Systems’ product.
Whereas some states do not allow limitations on how long implied warranties last, and do not allow exclusion
of incidental or consequential damages, the above limitations and exclusions may not apply to you. This
warranty gives you specific legal rights and you may also have other rights which may vary from state to state.
This warranty is subject to the following conditions:
1) This system must have been purchased from an authorized Nady dealer and all warranty service must be
performed by Nady’s service department. Any service not performed by Nady will automatically void this
warranty.
2) Items not covered: physical damage resulting from improper handling of the unit in transit from the factory
by the shipper (Nady Systems is not responsible for such damage and all such claims must be made against
the shipping company by the consignee.); defects caused by normal wear of the product (expendable parts
are typically connectors, cables, potentiometers, switches and similar components); damage or defects
caused by abuse, neglect, accident, failure to connect or operate the unit in any way that does not comply
with applicable technical or safety regulations, or improper repair, excessive heat or humidity, alteration or
unreasonable use of the unit, causing cracks, broken cases/housings or parts; damage caused by leaking
batteries; finish or appearance items; items damaged in shipment en route to Nady Systems, Inc. for repair.
The warranty is null and void if any Nady serial number has been removed or defaced.
How To Obtain Service:
1) If factory service is required, you must contact our Service Department at (510) 652-2411 for a return
authorization (R/A) number. Make sure the R/A number is clearly marked on the outside of your package.
(Please note: if an R/A number is not included, our Shipping Department cannot accept your package.)
2) Send the unit back to Nady Systems, Inc., 6701 Shellmound Street, Emeryville, CA, 94608, freight pre-paid.
You must include proof of date and place of purchase (i.e., photocopy of your bill of sale) or Nady cannot be
responsible for repair or replacement. Nady Systems, Inc. will not repair, nor be held responsible, for any units
returned without proper identification, return address, and RA number clearly marked on the package.
3) Per the above, Nady will perform all warranty service and return the unit to you at no charge. Nady Systems
will inform the buyer if product sent in does not meet the terms of this warranty and will provide a quote for
fixing the unit and/or shipping it back exclusively at the buyer’s expense.
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Nady wireless microphone systems are type accepted under FCC rules parts 90, 74, and 15.
This 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.
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6701 Shellmound Street Emeryville, CA USA 94608
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t 510.652.2411 f 510.652.5075 www.nady.com
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