Palmer PMBL Line Summierer 2 Kanal Passiv User Manual

PMBL
LINE SUMMIERER 2 KANAL PASSIV

USER´S MANUAL

PREVENTIVE MEASURES

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 certain that wall mounts are properly installed and secured. Make certain that the equipment is installed securely and cannot fall down.

7. During installation, observ e 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. Avoid direct sunlight!

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. .Do not open or 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 equipment or if it has been damaged in anot her 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 separate plastic and paper/cardboard.

21. .Plastic bags must be kept out of reach of children.
    FOR EQUIPMENT THAT CONNECTS TO THE POWER MAINS

22. CAUTION: If the power cord of the device is equipped with an earthing contact, then it must be connected to an outlet with a protective ground. Never deactivate the protective ground of a power cord.

23. .If the equipment has been exposed to strong fluctuations in temperature (for example, after transport), 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.

24. .Before connecting the equipment to the power outlet, first, verify that the mains voltage and frequency match the values specified on the equipment. If the equipment has a voltage selection switch, connect the equipment to the power outlet only if the equipment values and the mains power values match. If the included power cord or power adapter does not fit in your wall outlet, contact your electrician.

25. .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.

26. .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.

27. .Whenever possible, avoid switching the equipment on and off in quick succession because otherwise, this can shorten the useful life of the equipment.

28. . IMPORTANT INFORMATION: Replace fuses only with fuses of the same type and rating. If a fuse blows repeatedly, please contact an authorised service centre.

29. .To disconnect the equipment from the power mains completely, unplug the power cord or power adapter from the power outlet.

30. .If your device is equipped with a Volex power connector, the mating Volex equipment connector must be unlocked before it can be removed. However, this also means that the equipment can slide and fall down if the power cable is pulled, which can lead to personal injuries and/or other damage. For this reason, always be careful when laying cables.

31. .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: Never remove the cover, because otherwise there may be a risk of electric shock. There are no user serviceable parts inside. Have repairs carried out only by qualified service personnel.

The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electrical shock.

The exclamation mark within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance instructions.

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-pressure 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.
To prevent possible hearing damage, avoid listening at high volume levels over long periods of time. Even exposure to short bursts of loud noise can result in hearing loss. Please keep the volume constantly at a comfortable level.

INTRODUCTION

When mixing electrical signals, the sources may interfere with each other. Decoupling resistors can reduce the effect, but lossless mixing is only possible with an active protection circuit. However, active electronics always involve time and effort and therefore generate extra costs. In some cases, however, you would not want to go to this length and since there is often enough volume, the passive mixing of signals is the most effective method. For such uses, we have developed the Palmer Merge Box. Typical application: the outputs of two mixers are mixed and fed to a sound system. Or: a left/right stereo signal is turned into a mono signal.

CONNECTION

The PMB-L is designed for balanced wiring. The device has two independent channels. According to the standard, inputs are designed as XLR female and the outputs as XLR male. The pins are connected 1:1, so it does not matter which pin has a positive phase. Standard shielded XLR cables should be used for connection. (Balanced Microphone Cable). If, as described above, two mixers are operated on an amplifier system, then the Master Out L/R of mixer A should be connected to the two top inputs and mixer B to the bottom two. The middle XLR/m jack sockets supply the L/R output signal to the power amplifiers. The PMB-L has some features that have proven themselves in practice. The top two inputs are galvanically isolated from the other inputs and outputs. Thus, the risk of ground loops and the associated hum is greatly diminished. Individual ground lift switches still allow to connect to the earth, if necessary. The housing of the Merge Box is firmly connected with the output on the left side.

1.  These two switches disconnect (LIFT) or connect (GND) the galvanically isolated inputs for each channel pin 1.
2. These two inputs are galvanically isolated.
3. The chassis ground is connected to pin 1 of this socket.

Mix two mixers and feed to a power amplifier

1. Connect the Left Out from mixer 1 to this input.

2. Connect the Right Out from mixer 1 to this input.

3. Connect the Left Input of the power amplifier to this output.

4. Connect the Right Input of the power amplifier to this output.

5. Connect the Left Out from mixer 2 to this input.

6. Connect the Right Out from mixer 2 to this input.

7. Input left channel.

8. Output mono signal.

9. Input right channel.

VOLUME LEVEL & IMPEDANCE

The PMB-L should work with all current Line inputs and outputs without any problems. For best results, the output impedance of the devices being mixed together should range between 600 ohms and a maximum 2 Kohms. The box handles a maximum input level of +20 dBu on the transformer-isolated side. The average attenuation is 6 dB. Since power amplifiers usually operate in the range between 0 and +6 dBu, but mixers often provide an undistorted output level of +20 dBu, the level loss can easily be compensated.

MIXING BALANCED AND UNBALANCED SIGNALS

When you mix an unbalanced and a balanced input together, you will get a balanced output, if you connect the unbalanced input to the transformer- isolated side as
follows: +phase with pin 2 of the XLR socket, shielding with pin 3. (Assuming that in the other configuration pin 2 is hot, otherwise +phase with pin 3 and hielding with pin 2). The box can also be used for the conversion of unbalanced to balanced.

TIP: Palmer also offers a box, in the same design as the PMB-L, whose levels and impedances for connection are optimised for microphones. Item Number: PMB-M

SPECIFICATIONS

MANUFACTURER´S DECLARATIONS

MANUFACTURER‘S WARRANTY & LIMITATIONS OF LIABILITY

You can find our current warranty conditions and limitations 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: Info@adamhall.com / +49 (0)6081 / 9419-0.

CORRECT DISPOSAL OF THIS PRODUCT
(valid in the European Union and other European countries with a differentiated waste collection system)
This symbol on the product, or on its documents indicates that the device 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. Household users should contact either the retailer where they purchased this product, or their local government office, for details on where and how they can recycle this item in an environmentally friendly manner. Business users should contact their supplier and check the terms and conditions of the purchase contract. This product should not be mixed with other commercial waste for disposal.

WWW. PALMER-GERMANY.COM
Palmer is a brand of the Adam Hall GmbH
ADAM HALL GMBH
Daimlerstrasse 9 ∙ 61267 Neu-Anspach ∙ Germany
Fon: (+49) 6081 / 94 19 – 0 ∙ Fax: (+49) 6081 / 94 19 – 1000
www.adamhall.com

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