PDIR
01
– DI-REVERSE – REVERSED DI BOX
SAFETY INFORMATION
1. Please read these instructions carefully.
2. Keep all information and instructions in a safe place.
3. Follow the instructions.
4. Observe all safety warnings. Never remove safety warnings or other information from the equipment.
5. Use the equipment only in the intended manner and for the intended purpose.
6. Use only sufficiently stable and compatible stands and/or mounts (for fixed installations). Make cer-
tain that wall mounts are properly installed and secured. Make certain that the equipment is installed
securely and cannot fall down.
7. During installation, observe the applicable safety regulations for your country.
8. Never install and operate the equipment near radiators, heat registers, ovens or other sources of heat.
Make certain that the equipment is always installed so that is cooled sufficiently and cannot overheat.
9. Never place sources of ignition, e.g., burning candles, on the equipment.
10. Ventilation slits must not be blocked.
11. Do not use this equipment in the immediate vicinity of water (does not apply to special outdoor
equipment - in this case, observe the special instructions noted below. Do not expose this equipment
to flammable materials, fluids or gases.
12. Make certain that dripping or splashed water cannot enter the equipment. Do not place containers
filled with liquids, such as vases or drinking vessels, on the equipment.
13. Make certain that objects cannot fall into the device.
14. Use this equipment only with the accessories recommended and intended by the manufacturer.
15. Open the device for changing the battery, do not modify this equipment.
16. After connecting the equipment, check all cables in order to prevent damage or accidents, e.g., due
to tripping hazards.
17. During transport, make certain that the equipment cannot fall down and possibly cause property
damage and personal injuries.
18. If your equipment is no longer functioning properly, if fluids or objects have gotten inside the equip-
ment or if it has been damaged in another way, switch it off immediately and unplug it from the
mains outlet (if it is a powered device). This equipment may only be repaired by authorized, qualified
personnel.
19. Clean the equipment using a dry cloth.
20. Comply with all applicable disposal laws in your country. During disposal of packaging, please sep-
arate plastic and paper/cardboard.
21. Plastic bags must be kept out of reach of children.
22. If the equipment has been exposed to strong fluctuations in temperature (for example, after trans-
port), do not switch it on immediately. Moisture and condensation could damage the equipment. Do
not switch on the equipment until it has reached room temperature.
23. Do not step on the power cord. Make certain that the power cable does not become kinked, especially
at the mains outlet and/or power adapter and the equipment connector.
24. When connecting the equipment, make certain that the power cord or power adapter is always freely
accessible. Always disconnect the equipment from the power supply if the equipment is not in use
or if you want to clean the equipment. Always unplug the power cord and power adapter from the
power outlet at the plug or adapter and not by pulling on the cord. Never touch the power cord and
power adapter with wet hands.
25. To disconnect the equipment from the power mains completely, unplug the power cord or power
adapter from the power outlet.
26. Unplug the power cord and power adapter from the power outlet if there is a risk of a lightning strike
or before extended periods of disuse.
CAUTION:
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
There are no user serviceable parts inside. Have repairs carried out only by qualified service personnel.
CAUTION – HIGH VOLUME LEVELS WITH AUDIO PRODUCTS!
This equipment is intended for professional use. Therefore, commercial use of this equipment is subject
to the respectively applicable national accident prevention rules and regulations. As a manufacturer, Adam
Hall is obligated to notify you formally about the existence of potential health risks. Hearing damage due to
high volume and prolonged exposure: When in use, this product is capable of producing high sound-pres-
sure levels (SPL) that can lead to irreversible hearing damage in performers, employees, and audience
members. For this reason, avoid prolonged exposure to volumes in excess of 90 dB.
MANUFACTURER’S WARRANTY & LIMITATION OF LIABILITY
You can find our current warranty conditions and limitation of liability at: http://www.adamhall.com/media/
shop/downloads/documents/manufacturersdeclarations.pdf
To request warranty service for a product, please contact Adam Hall GmbH, Daimler Straße 9, 61267 Neu
Anspach / Email [email protected] / 49 (0) 6081 / 9419-0
PROPER DISPOSAL OF THIS PRODUCT
(WASTE ELECTRICAL AND ELECTRONIC EQUIPMENT)
(Valid in the European Union and other European countries with waste separation)
This symbol on the product, or the documents accompanying the product, indicates that this appliance
may not be treated as household waste. This is to avoid environmental damage or personal injury due
to uncontrolled waste disposal. Please dispose of this product separately from other waste and have it
recycled to promote sustainable economic activity.
SCOPE OF APPLICATION
Users frequently attempt to connect a DI box in reverse in order to feed a balanced signal into an un-
balanced input. Because of mismatching, however, this leads to unsatisfactory results. With the PDIR01
(DI-REVERSE), we offer a box that provides a perfect technical solution for this problem - without having
to resort to adapters.
If you want to convert a balanced input into an unbalanced output, the unbalanced cable should be kept
as short as possible because it is more prone to interference. The PDIR01 works with a transformer, and
under certain circumstances, reacts to strong magnetic interference by producing a hum and should
therefore not be placed near power transformers (less than 50 cm in distance). Before permanently
installing the PDIR01, please check if the selected location is suitable. There are screw holes in the base
plate for mounting the box.
A XLR/f connector, which is connected according to the standard, is used by the PDIR01 as input: PIN
1 = shield, ground, PIN 2 = hot (pos. phase), PIN 3 = cold (neg. phase). Use a good quality standard
microphone cable as the connection cable to a balanced output. A mono jack is used as a line-out socket;
the cable should be a well shielded instrument cable.
As indicated above, the conversion from balanced to unbalanced is done by a transformer. At the same
time, it provides for a galvanic separation. (No ground connection between input circuit to output circuit)
This may be undesirable, because missing ground connection = poor shielding which may cause hum
problems by spreading interfering signals. For this reason, a Ground Lift switch is provided on the PDIR01.
When pressed, it separates the ground connection from XLR PIN1. Thus, you remove another hum prob-
lem that is caused by uneven ground potentials (ground loop hum). Practical tip: Just try pressing the
Ground Lift switch to see what position results in the cleanest signal.
ADAPTATION
For optimal signal transmission, the input (signal source) should have an impedance between 200 and
2000 ohms. Ideally, the output (load) would have a 10 times higher value, in the range of 2 to 20 kOhm;
higher values cause no harm. Of course, you can also connect the PDIR01 “in reverse”. That way, you
could arrange for an unbalanced signal to be sent to a balanced input on an active speaker, for example.
Unlike a DI box, the volume level is not reduced from line to mic level, but remains 1:1.
ALTERNATIVE PRODUCTS
For resolving similar problems, Palmer offers the following products:
• PLI02, two-channel transformer with combi/XLR input and XLR/m output, professional level up to
20 dBu
• PLI01, single-channel transformer with stereo jacks for the input and output. Depending on whether
you are using a mono or stereo jack, the output jack can be balanced or unbalanced.
• PLI05, similar to PLI01, but providing two channels.
TECHNICAL SPECIFICATIONS
Product Type:
DI box
Type:
passive
Number of Channels:
1
Number of Inputs:
1
Input Connections:
XLR
Max. Input Level:
+6 dBu
Input Impedance:
2 kOhms
Number of Outputs:
1
Output Connections:
6.3 mm jack
Max Output Level:
+6 dB
Output Impedance:
2 k Ohms
Frequency Response:
20 - 20,000 Hz
Transformer Balanced:
yes
Translation Ratio (Ratio):
1:1
Controls:
Ground Lift
Housing Material:
sheet steel
Housing Surface:
powder-coated
Width:
110 mm
Depth:
35 mm
Height:
39 mm
Weight:
0.17 kg
© Palmer Musical Instruments, Adam Hall GmbH, D-61267 Neu-Anspach, Daimlerstr. 9, Germany TEL: ++49 (0)6081 94190
FAX: ++49 (0)6081 43280 WEB: www.adamhall.com, www.palmer-germany.com EMAIL: [email protected]
