HDL-4 HDL-4 - Niles Audio
Contents
1. Speaker Pair 1 DEFINITION SPEAKER SELECTION 3 Make the connections to the HDL 4 The amplifier speaker connectors on the HDL 4 are removable If you wish you may remove the HDL 4 s connectors to facilitate installation see Figure 3 Strip 3 8 of insulation from the end of each wire Tightly twist the end of each wire until there are no frayed ends Insert each wire into the appropriate hole on the spring loaded connector terminals Be certain that proper phasing is observed connect the positive terminals on the HDL 4 to the positive terminals on the amplifier and speakers and the negative terminals on the HDL 4 to the negative ter minals on the amplifier and speakers Re install the connec tors if they were removed See Figure 4 4 Locate the pre printed Room Labels Affix the appropriate label to the recessed area over each ON OFF selector button Figure 3 Figure 4 Removing the Connectors Installing the Connectors SYSTEM DEFINITION SPEAKER SELECTION SYSTEM TECH TIP If your amplifier or receiver has A and B speaker pair outputs connect the HDL 4 to the A outputs Do not connect anything to This will prevent the amplifier or receiver from driving an unusually low impedance load Operation There are two ways to use the HDL 4 You may play one pair of speakers at a time or play multiple pairs simultaneously If you intend to play more than o2. HIGH DEFINITION SPEAKER SELECTION SYSTEM A NILES SPEAKER SELECTION SYSTEM HDL 4 High Definition Speaker Selector System TABLE OF CONTENTS Introduction 1 Features and Benefits Installation Considerations 4 Installation 9 Operation 11 Specifications 14 A Introduction The HDL 4 allows you to connect up to four pairs of speakers to your stereo receiver or amplifier and play any one pair any combination of pairs or all pairs at once You dont have to worry about overloading your amplifier The HDL 4 has a pro tection circuit that keeps your amplifier running safely even if you have all four pairs of speakers playing at the same time DEFINITION SPEAKER SELECTION SYSTEM Features and Benefits The HDL 4 offers a number of improvements over other speaker selectors High power handling capability of 250 watts channel continuous music power Pre printed Room Labels are included for easy identification of speaker ON OFF buttons e Rear panel switch for constant or selectable impedance protection e Self cleaning silver plated switch contacts assure many years of trouble free use e Isolated left and right channel ground retums make the HDL 4 compatible with all types of amplifiers e Massive copper traces on printed circuit board handle large amounts of amplifier current ensuring high dynamic range and clarity e May be used with 4 6 o
3. the load drops to slightly under 4 ohms If you intend to use the HDL 4 with more than two pairs of 4 ohm speakers it is recommended that you verify that the receiver or amplifier is capable of driving a 4 ohm load Consult your Niles dealer or receiver amplifier manufacturer if you are uncertain about the capabilities of the receiver amplifier Type of Speaker Wire For most applications we recommend you use 16 or 18 gauge stranded copper speaker wire for the HDL 4 connections For wiring runs longer than 80 feet 14 gauge wire is recommend ed Using speaker wire larger than 14 gauge for the HDL 4 connections is not recommended the wire may not fit into the connectors Never use solid core aluminum or Romex type wire with the HDL 4 When running speaker wires insde walls most states and municipalities in the U S specify that you must use a special type of speaker wire Usually the requirement is that the wire has a specific CL fire rating such as CL 2 or CL 3 Consult your Niles dealer building contrac tor or local building and inspection department if unsure about which type of wire is best for your application DEFINITION SPEAKER SELECTION SYSTEM Avoiding Interference Speaker wires can act as an antenna for electrical noise Locating speaker wires too close to a light dimmer or switch may cause a buzzing or popping sound to be heard through the speakers If you must locate the HDL 4 wiring
4. of your receiver or amplifier Amplifier Impedance Load As more pairs of speakers are parallel connected to a receiver or amplifier the overall system impedance becomes lower For example if two pairs of 8 ohm speakers are connected in parallel the impedance will be 4 ohms two pairs of 4 ohm speakers in parallel become 2 ohms and so on Most receivers or amplifiers are not rated for use below a 4 ohm load Most manufacturers do not recommend connect ing more than two pairs of speakers without using some form of impedance correction The HDL 4 includes impedance correction circuitry which protects your receiver or amplifier from low impedance loads The circuitry assures that your receiver or amplifier will see a safe operating load even when all four speaker pairs are playing at the same time TOOLS REQUIRED 1 8 Standard Slotted Screwdriver Wire Stripper DEFINITION SPEAKER SELECTION SYSTEM Wire size is expressed by it s AWG American Wire Gauge number The lower the AWG number the larger the wire i e 12 AWG wire is physically larger The actual impedance load the HDL 4 presents to your receiver or amplifier will vary depending on how many speaker pairs are playing and the impedance rating of each speaker If you have four pairs of 8 ohm speakers playing the HDL 4 will present a 4 5 ohm impedance load to your receiv er amplifier With four pairs of 4 ohm speakers playing
5. es 14 22 gauge 16 gauge recommended Overall Dimensions 17 wide x 2 high x 8 3 4 deep Weight 4 1 2 lb NILES Corporation www nilesaudio com 1999 Niles Audio Corporation Niles and the Niles logo are registered trademarks of Niles Audio Corporation 12331 S W 130 Street Printed in USA 2 99 05000994 Miami Florida 33186 Tel 305 238 4373 Fax 305 238 0185
6. iple speaker pairs simultaneously Since most 4 ohms receivers and amplifiers are not rated for use below a 4 ohm load you will need to activate the PROTECTION button whenever the overall system impedance might fall below 4 ohms Use the following chart as a guide for setting the PROTECTION button When playing the following speakers The Protection button should be combination and 8 ohm speakers ON Set the PROTECTION button to the correct position using the chart shown above 3 Locate the ON OFF buttons on the HDL 4 which corre spond to the speaker pairs you wish to play Set them to the ON position HIGH DEFINITION SPEAKER SELECTION SYSTEM 4 Tum on the amplifier or receiver and select a source such as the tuner CD player 5 Slowly turn up the amplifier or receiver volume and set it to a comfortable not maximum listening level Be careful not to overdrive or clip your amplifier If the sound becomes muddy or distorted you have reached the limit of your amplifier s volume capability and should quickly reduce the volume to avoid damaging your speakers 6 To turn off one or more speaker pairs simply press the cor responding ON OFF button s on the HDL 4 Refer to the Protection chart for the correct setting of the PROTECTION button Constant Protection Switch The HDL 4 is equipped with a manual override for the protec tion circuit that enables you to defeat the front pa
7. ne pair of speakers at the same time you will need to become familiar with the opera tion of the HDL 4 s PROTECTION button Playing One Pair of Speakers At a Time 1 Make sure the amplifier or receiver power is OFF and set the volume to minimum 2 Locate the ON OFF button on the HDL 4 which corre sponds to the speaker pair you wish to play Set it to the ON position 3 Turn on the amplifier or receiver and select a source such as the tuner or CD player 4 Slowly turn up the amplifier or receiver volume and set it to a comfortable not maximum listening level Be careful not to overdrive or clip your amplifier If the sound becomes muddy or distorted you have reached the limit of your amplifier s volume capability and should quickly reduce the volume to avoid damaging your speakers 5 To turn off the speaker pair simply press the correspond ing ON OFF button on the HDL 4 DEFINITION SPEAKER SELECTION SYSTEM Playing Two or More Speaker Pairs Simultaneously TECH TIP 1 Make sure the amplifier or receiver power is OFF and set the volume to minimum You will need to activate the HDL 4 s 2 On the right side of the HDL 4 s front panel is a button PROTECTION button labeled PROTECTION This button activates the HDL 4 s whenever the overall impedance correction circuitry The circuitry assures that system impedance your receiver or amplifier will see a safe operating load when might fall below playing mult
8. near electrical devices route the speaker wires several feet away from the electrical wiring Using the HDL 4 with Tube Type Amplifiers Virtually all tube amplifiers must have a load connected at all times If the amplifier to be connected to the HDL 4 is a tube amplifier be sure to always have at least one pair of soeakers switched on at all times An alternative is to permanently connect 150 ohm 5 watt resistor across the tube amplifier s output in parallel with the HDL 4 See Figure 1 on next page for hookup diagram DEFINITION SPEAKER SELECTION SYSTEM ca Figure 1 Using a Tube Amplifier SPEAKER 3 SPEAKER 2 L R l gt R R CONSTANT NITES PROTECTION DEFINITION SPEAKER SELECTION SYSTEM Recessed areas for custom room labels Attractive low profile design Simple Connect up to four pairs Protection switch safeguards your push button of speakers receiver or amplifier even with all operation 4 pairs of speakers playing Constant Two piece Impedance removable Protection connectors Switch DEFINITION SPEAKER SELECTION SYSTEM Installation 1 Select a convenient mounting location for the HDL 4 2 Run all the necessary wiring to the HDL 4 Label the wires for future reference See Figure 2 Receiver Figure 2 Wiring Diagram CJ TUNER 94 9 is lil lu c3CXCXCXCXCXCXLXCXCLQ3
9. nel protection switch and maintain constant impedance protection This will safeguard your amplifier from being overdriven due to acciden tal or improper use by anyone unfamiliar with the equipment To engage this override move the rear panel CONSTANT PROTECTION switch to the ON position Constant impedance protection will be maintained until the switch is tumed to OFF DEFINITION SPEAKER SELECTION SYSTEM Balancing Speaker Volume The volume control on your receiver or amplifier serves as the master volume for all speaker pairs connected The volume level of the speakers may vary from room to room This is caused by several factors Two lesser factors are the size of the speaker and its efficiency The largest factor is the physi size of the room The best way to balance speaker volume is to equip each of the speaker pairs in your system with a Niles volume control The controls allow you to adjust the volume of each speaker pair individually If all the speaker pairs in your system are equipped with Niles volume controls you can leave the amplifier or receiver volume set at one position and use the Niles controls exclusively SPECIFICATIONS Audio Power Handling 250 watts channel continuous music power Frequency Response 0 0 dB flat from 20 Hz to 20 kHz Mounting Table Top component Wiring Requirements Individual runs of 2 conductor speaker wire Connectors accommodate wire siz
10. r 8 ohm speaker systems TECH SUPPORT HOTLINE If you have questions regarding the operation of the Niles HDL 6 contact your local Niles dealer or Niles Customer Service at 1 800 289 4434 HIGH DEFINITION SPEAKER SELECTION SYSTEM e Two piece removable connectors greatly simplify installa tion and hookup All wiring can be attached directly to the connectors before installing them in the HDL 4 e Removable connectors accommodate up to 14 gauge wire or pins making the HDL 4 compatible with most high definition speaker cables e 100 tested electronically and acoustically for frequency response distortion and power handling e Standard 17 width allows the HDL 4 to stack neatly with other standard size components e Ideal for both home and commercial sound installations e Only an 1 8 standard screwdriver and wire stripper are required for installation e Frequency response Hat 40 dB 0 dB from 20 Hz to 20 kHz e Ten year parts and labor warranty e Proudly made in the USA DEFINITION SPEAKER SELECTION SYSTEM Installation Considerations HDL 4 Power Handling The HDL 4 is designed for use with a receiver or amplifier having a maximum power output of 250 watts per channel at 8 ohms Damage caused by the use of a higher power receiver or amplifier will void the warranty Consult your Niles dealer or receiver amplifier manufacturer if you are uncer tain about the power rating
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