Nady Systems Musical Instrument RDI 8 User Manual

O W N E R ’ S M A N U A L  
RDI-8  
8 CHANNEL DI BOX + LINE MIXER  
 
WARNING  
An equilateral triangle enclosing a lightening flash/arrowhead symbol is  
intended to alert the user to the presence of uninsulated dangerous  
voltagewithin the products enclosure which may be of sufficient  
magnitude to constitute a risk of electric shock.  
ATTENTION: RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR  
An equilateral triangle enclosing an exclamation point is intended to alert  
the user to the presence of important operating and service instructions in  
the literature enclosed with this unit.  
IMPORTANT SAFETY INSTRUCTIONS  
When using this electronic device, basic precautions should always be taken, including the following:  
1. Read all instructions before using the product.  
2. Do not use this product near water (e.g., near a bathtub, washbowl, kitchen sink, in a wet basement, or near a swimming  
pool, etc.).  
3. This product should be used only with a cart or stand that will keep it level and stable and prevent wobbling.  
4. This product, in combination with headphones or speakers, may be capable of producing sound levels that could cause  
permanent hearing loss. Do not operate for a long period of time at a high volume level or at a level that is uncomfortable.  
If you experience any hearing loss or ringing in the ears, you should consult an audiologist.  
5. The product should be positioned so that proper ventilation is maintained.  
6. The product should be located away from heat sources such as radiators, heat vents, or other devices  
(including amplifiers) that produce heat.  
7. The product should be connected to a power supply only of the type described in the operating instructions or as marked on the  
product. Replace the fuse only with one of the specified type, size, and correct rating.  
8. The power supply cord should: (1) be undamaged, (2) never share an outlet or extension cord with other devices so that the  
outlets or extension cords power rating is exceeded, and (3) never be left plugged into the outlet when not being used for  
a long period of time.  
9. Care should be taken so that objects do not fall into, and liquids are not spilled through, the enclosures openings.  
10. The product should be serviced by qualified service personnel if:  
A.  
B.  
C.  
D.  
E.  
The power supply cord or the plug has been damaged.  
Objects have fallen into, or liquid has been spilled onto the product.  
The product has been exposed to rain.  
The product does not appear to operate normally or exhibits a marked change in performance.  
The product has been dropped, or the enclosure damaged.  
11. Do not attempt to service the product beyond what is described in the user maintenance instructions. All other servicing should  
be referred to qualified service personnel.  
3
 
INSTALLATION  
To ensure years of enjoyment from your NADY AUDIO RDI-8, please read and understand this manual thoroughly before  
using the unit.  
INSPECTION  
Your RDI-8 was carefully packed at the factory in packaging designed to protect the units in shipment. Before installing and using your  
unit, carefully examine the packaging and all contents for any signs of physical damage that may have occurred in transit.  
(Note: Nady Systems is not responsible for shipping damage. If the unit is damaged, do not return to us, but notify your dealer and the  
shipping company immediately to make a claim. Such claims must be made by the consignee in a timely manner.)  
CONTENTS:  
Instruction manual  
RDI-8 (verify that the units serial number is same as shown on shipping carton)  
AC Power cord  
Warranty Card  
RACK MOUNTING  
The RDI-8 fits into one standard 19" rack unit of space (1 3/4"). Parts of the unit can become very warm during use. This is normal  
during operation. Care should be taken to ensure that there is enough space around the unit for cooling (at least 12or 30cm). Do not  
place the RDI-8 on high temperature devices such as power amplifiers, etc., or the unit may overheat in operation. Also, do not place  
the unit on speakers as this may cause them to move and/or fall due to speaker vibrations.  
Although the units chassis is shielded against radio frequency (RF) and electromagnetic interference (EMI), extremely high fields of RF  
and EMI should be avoided.  
POWER CONNECTION  
The RDI-8 has an internal power supply and is designed to operate from an external AC source. Power requirements for electrical  
equipment differ from area to area. Be sure to confirm that the voltage selected by the voltage selector switch on the back panel is  
proper for your area (120VAC/60 Hz or 230VAC/50Hz) per the information below:  
Europe (except UK): 230V, 50Hz  
UK and Australia: 240V, 50Hz  
USA and Canada: 120V, 60 Hz  
For other areas, please check with local authorities.  
When ready to operate, plug the AC cord into the power source. Make sure that the unit is turned off before connecting to the AC  
power source to avoid possible loud transients which can damage your speakers or your ears, especially when monitoring with  
headphones.  
4
 
FRONT & REAR CONNECTIONS  
(1) (2) (6) (10)  
FRONT PANEL  
REAR PANEL  
(3) (4) (5) (7)  
(11)  
(12)  
(9) (15)  
(8)  
(13) (14)  
(13) STEREO MASTER OUTPUTS  
FRONT PANEL  
This pair of Left/Right unbalanced RCA jack outputs provides a  
stereo output when the unit is used as a line mixer (see  
APPLICATIONS, Using the RDI-8 as a line mixer, pg. 6). The  
output level is controlled by the individual channel VOLUME  
CONTROLS (3) and the MASTER VOLUME CONTROL (7). The  
panning (L/R) is adjusted by the channel PAN CONTROLS (4).  
(14) STEREO LINE OUTPUTS  
This pair of Left/Right unbalanced RCA jack outputs provides a  
second stereo output when the unit is used as a line mixer (see  
APPLICATIONS, Using the RDI-8 as a line mixer, pg. 6)  
The output level is controlled by the individual channel VOLUME  
CONTROLS (3). The panning (L/R) is adjusted by the channel  
PAN CONTROLS (4).  
(1) AUDIO INPUTS  
Eight 1/4unbalanced audio input jacks (one per channel)  
(2) PARALLEL LINK OUTPUTS  
Eight 1/4unbalanced line level jacks output connections for  
parallel channel line distribution  
REAR PANEL  
(8) AUDIO OUTPUTS  
Eight XLR balanced output connectors (one per channel)  
(11) POWER CONNECTOR WITH FUSE HOLDER  
This standard IEC power cord receptacle is used to connect the  
AC power to your unit. It features a built-in fuse holder for a  
5X20mm, 0.5A/250V slow-blow fuse. If the fuse continuously  
blows, shut off the unit and have it serviced by qualified service  
personnel.  
CONTROLS & INDICATORS  
FRONT PANEL  
(10) POWER LED INDICATOR  
This LED indicator illuminates when the unit is powered on by the  
rear panel POWER SWITCH (9).  
The RDI-8 has 8 independent direct injection unbalanced to  
balanced line converters, in addition to a built-in 8-channel line  
mixer. The unit provides 2 rotary controls (Volume & Pan) and 2  
switches per channel (Ground lift & 20dB PAD).  
(3) VOLUME CONTROLS  
REAR PANEL  
(9) POWER SWITCH  
Use these independent rotary controls to set the level of each  
channel signal level sent to the stereo MASTER (13) and LINE  
(14) outputs. They do not affect the signal level to the channel  
OUPTUTS (8)  
To turn the unit ON or OFF, press the upper or lower portion of  
this button as indicated. The front panel POWER LED  
INDICATOR (10) will illuminate when the power is ON. Before  
turning on this unit, verify connection to the proper voltage AC  
source, check all connections and turn down the level controls of  
equipment connected to the outputs.  
(12) AC VOLTAGE SELECTOR SWITCH  
Before plugging in the power cord, check to see that the unit is  
set for the proper voltage for your area: ~115v (60Hz) or ~230V  
(50Hz).  
(4) PAN CONTROLS  
Use these independent rotary controls to set the PAN (Left and  
Right Imaging) of each channel signal sent to the stereo  
MASTER (13) and LINE (14) outputs.  
(5) GROUND LIFT SWITCHES  
Use these switches to lift the ground in the input signal of the  
channel being used (if needed to eliminate hum caused by that  
input). These affect all the OUTPUTS (8,13,14)  
(6) 20dB PAD SWITCHES  
(Note: use at the improper voltage can damage your unit and  
void the warranty.)  
(15) GROUND  
Use these switches to PAD each input channel signal level by  
20dB. Use this only if you have an extremely high input signal  
strength. These affect all the OUTPUTS (8,13,14)  
Connect short wire to rack or other equipment to ground this unit  
for safety.  
5
 
APPLICATIONS  
USING THE RDI-8 AS A DI BOX (DIRECT INJECTION UNIT)  
Connect the signal you would like to convert from unbalanced to balanced to the RDI-8 via a 1/4unbalanced plug to one of the chan-  
nel LINE INPUTS (1) on the front panel of the unit. Connect an XLR balanced cable to the corresponding channel OUTPUT (8) on the  
rear of the RDI-8 and connect to your chosen destination. If the input signal strength is too hot(high) you can depress the 20dB PAD  
(6) switch to adjust to a more appropriate level. If there is a ground loop hum you can remove it by depressing the GROUND LIFT (5)  
switch.  
USING THE RDI-8 AS A LINE MIXER  
You can mix volume & pan of all input signals simultaneously to both stereo pairs of RCA connections on the rear of the RDI-8: the  
MASTER (13) and LINE (14) outputs. This enables use of the unit as a fully functional line mixer. This can be very handy for many ap-  
plications, both live and in the studio. Just connect either or both the stereo MASTER (13) or LINE (14) outputs on the rear to your  
chosen destination(s), such as a monitor amplifier, and adjust the individual VOLUME (3) and PAN (4) controls for each individual  
channel on the front of the RDI-8 to suit your needs. A MASTER VOLUME (7) control is provided on the front panel, in addition to the  
individual controls, and adjusts only the MASTER (13) output. Adjust as necessary.  
USING THE RDI-8 PARALLEL CHANNEL LINE OUTPUT  
A unbalanced parallel LINK OUTPUT (2) is provided on the front panel next to each LINE INPUT (1) jack. This is useful for routing a  
direct link out, in addition to the balanced XLR OUTPUT (8) on the rear panel (for example, if you would like to monitor a specific input  
locally while sending a XLR balanced direct output to another source without affecting the line mixer signal).  
SPECIFICATIONS  
FUNCTION CONTROLS  
AUDIO INPUTS  
Volume ......................................................... Per channel variable  
Volume ......................................................... Per channel variable  
Connectors .......................................................................1/4" jack  
Type ........................................................................TRS balanced  
Impedance .................................................................... 47k Ohms  
Min Sensitivity ...................................................................... -20dB  
Peak input level................................................................... +16dB  
POWER SUPPLY  
Power requirement............................ Selectable, ~ 100-120 VAC,  
~ 200-240 VAC, 50-60 Hz  
Power consumption ........................................................... 11.5VA  
Fuse ....................................... 100-120 VAC: 630 mA (slow-blow)  
200-240 VAC: 315 mA (slow-blow)  
PARALLEL LINK OUTPUTS  
Connectors .......................................................................1/4" jack  
Type ...............................................................Unbalanced/parallel  
100-240 VAC: 500 mA (slow-blow)  
5X20mm glass type  
STEREO LINE MIXER OUTPUTS  
Power cord connector ............................ Standard IEC receptacle  
with built-in fuse holder  
Connectors ..................................................................RCA Phono  
Impedance .................................................................... 600 Ohms  
Max. output level............................... +2dB (peak level +18.5 dB)  
PHYSICAL  
Dimensions .................... 1.75"X 19"X 8.5" (44.5X482.6X217mm)  
Weight ................................................................. 7.15lbs (3.25Kg)  
XLR BALANCED OUTPUTS  
Connectors ..................................................... XLR Type balanced  
Min. output impedance.................................................. 600 Ohms  
Max. output level................................... 0dB (peak level +18.5dB)  
The specifications above are correct at the time of printing of this  
manual. For improvement purposes, all specifications for this unit,  
including design and appearance, are subject to change without  
prior notice.  
DISTORTION, FREQUENCY RESPONSE,  
S/N RATIO & CROSSTALK  
Frequency response .................................20Hz~20kHz, 0dB~-2B  
Distortion ............................................................................. 0.02%  
S/N Ratio............................................................ Better than 95dB  
Crosstalk rejection ...............................>80dB@1kHz;-20dB input  
6
 
NOTES  
7
 
SERVICE FOR YOUR NADY AUDIO PRODUCT  
(U.S.) Should your NADY AUDIO product require service, please contact the Nady Service Department via telephone  
at (510) 652-2411, or e-mail at [email protected].  
(International) For service, please contact the NADY AUDIO distributor in your country through the dealer from  
whom you purchased this product.  
DO NOT ATTEMPT TO SERVICE THIS UNIT  
YOURSELF AS IT CAN BE DANGEROUS AND  
WILL ALSO VOID THE WARRANTY.  
NADY SYSTEMS, INC. 6701 SHELLMOUND STREET, EMERYVILLE, CA 94608  
Tel: 510.652.2411 Fax: 510.652.5075 www.nady.com  
 

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