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TBL-75

1. Watts per channel divided by the number of pairs should equal or exceed the indi vidual speaker s minimum wattage requirements 2 It is recommended to use an UltraMatch volume control for each room 3 Every jumper setting must be set on the same setting throughout the system 4 A minimum speaker load of 4 ohms can be connected to the output of each UltraMatch volume control Impedance Matching Charts For UltraMatch Impedance Matching For 4 Ohm Amplifiers 1121314 4 Ohm Pairs Example The table to the right shows an 8 ohm minimum imped ance amplifier with 1 pair of 4 ohm speakers and 3 pair of 8 ohm speakers The chart indicates the jumper setting should be set at 8X 0 11 12 13 14 15 16 1x 1X 2x 2x ax 4x ax 4x 8x 8x 8x 8x 8X 8x ex 8X 2X 4x 4x 4 Ohm Pairs 8 Ohm Pairs 8 9 1 Impedance Matching For 8 Ohm Amplifiers 8 Ohm Pairs 112 4 5 6 2X 4X 4X EM 8X 8x 8x 8X 8X TYPE OF SPEAKER WIRE For most applications we recommend you use 16 or 18 gauge stranded copper speaker wire for the TBL 75 speaker connections For wiring runs longer than 100 feet 14 gauge wire is recommended Using speaker wire larger than 14 gauge for TBL 75 Volume Controls is not recommended as the wire may not fit into the connectors NOTE Never use solid core aluminum or Romex type wire with volume controls Whe
2. the speaker leads from the amplifier s outputs to the connector labeled Input on the EZB 1SC The wires should stay consistent left of the amplifier to left Input of the EZB 1SC observing polarity and identification 2 Connect speaker wire from the EZB 1SC Output connector to the Input connector on the TBL 75 3 Connect speaker wire from the TBL 75 Output connectors to the speakers Speaker wire Amplifier TBL 75 EEE rs er KRussound OO 9 6 gp OP PE ese Ce ARSA 7 El warnan C Speaker wire I P Speakers EZB 1SC OPTIONAL O O Tr S RUSSOUND 3 ornes ss 8 Q O Speaker wire i B ALTx volume control Speakers Boon E E gt Speaker wire Typical TBL 75 Configuration optional connections for EZB 1SC OPERATION 1 Make sure the amplifier or receiver is OFF and set the volume to minimum 2 Set the TBL 75 volume to maximum fully clockwise 3 Turn on the amplifier or receiver and select a music source such as tuner or CD player 4 Slowly turn up the amplifier or receiver volume and set it to a comfortable not maxi mum listening level Be careful not to overdrive your amplifier If the sound becomes
3. KlRussound TBL 75 Table Top Volume Control Instruction Manual INTRODUCTION The TBL 75 Volume Control is a free standing stereo speaker level volume control with a front panel headphone jack and built in impedance matching options It connects between the speaker outputs of an amplifier or receiver and a pair of speakers The TBL 75 adjusts the volume of the speakers connected to it by adjusting the signal from the amplifier to the speakers The TBL 75 is ideal for private listening as its tabletop design is suitable for placement on a desk or bedside stand When headphones are connected through the headphone jack it interrupts the speaker output and the volume knob then controls the headphone audio levels When using the TBL 75 in installations with more than one pair of speakers or with additional volume controls the TBL 75 has a rear panel impedance selector switch to be set at 1X 2X 4X and 8X The 1X setting allows the volume control to be used as a standard control The 2X 4X and 8X settings allow it to be used as an UltraMatch impedance matching volume control The UltraMatch volume control matches the minimum output impedance of the amplifier or receiver in addition to adjusting volume It eliminates the need for a speaker selector or additional impedance matching equip ment PROPER SELECTOR SWITCH SETTING FOR IMPEDANCE MATCHING By determining the drive capability of the amplifier with a few simple calculations you c
4. an determine the number of speakers the system can safely operate The selector switch must be set in a position that correctly multiplies the impedance of the system to a level that is equal to or greater than the impedance of the amplifier The switch setting can be determined using the following simple steps 1 Determine the amplifier s minimum impedance The amplifier s minimum impedance is usually found following Wattage and Frequency Response in the amplifier s speci fication page of the manual It may also be listed on the back panel of the amplifier near the speaker terminals The impedance value is expressed in ohms 2 Identify the correct impedance matching chart according to the amplifier s minimum impedance There are two impedance matching charts one for 8 ohm amplifiers and one for 4 ohm amplifiers Choose the chart that describes your amplifier If your amplifier is 6 ohm stable use the 8 ohm chart 3 Determine the impedance for each pair of speakers by referring to its manual 4 Determine the total number of 4 ohm pairs of speakers rows on charts If using 6 ohm speakers treat them as 4 ohm speakers 5 Determine the total number of 8 ohm pairs of speakers columns on charts 6 Follow the appropriate row and column to determine selector switch settings 7 Set the selector switch to the correct X setting as determined CONSIDERATIONS 1 Make sure that your amplifier has adequate wattage for the number of speakers
5. d correct any defect in workmanship without charge for parts or labor For this warranty to apply the unit must be installed and used in accordance to its written instructions If necessary repairs must be performed by Russound The unit must be returned to Russound at the owner s expense and with prior written permis sion of Russound Accidental damage and shipping damage are not considered defects nor is damage resulting from abuse or from servicing performed by an agent or person not specifically authorized in writing by Russound Damage to or destruction of components due to application of excessive power voids the warranty on those parts Repairs to components damaged or destroyed due to application of excessive power will be made by charging the owner the retail value of the parts and labor for the repair To return items for repairs the unit must be shipped to Russound at the owner s expense along with a written explanation of the nature of the service required The unit must be packed in a corrugated container with at least 3 inches of resilient material to protect the unit from damage in transit Russound reserves the right to request proof of purchase Except to the extent prohibited by applicable law no other warranties whether expressed or implied other than the express warranties stated herein shall apply to units sold to the purchaser Russound shall not be liable for any implied war ranty of merchantability or fitness for a par
6. muddy or distorted you have reached the limit of your amplifiers volume capability and should quickly reduce the volume to avoid damaging your speakers NOTE 12 o clock 60 on most receivers is full volume An amplifier that is being driven beyond its potential will produce D C voltage clipping which will not pass through a transformer resulting in improper signal transfer and possible damage to volume control and amplifier 5 Adjust the volume of the speakers to the desired listening level using the TBL 75 6 You can turn off the speakers in each room by turning the knob on the TBL 75 com pletely counter clockwise IMPORTANT If you are unsure of any of the installation procedures the products should be installed by a professional custom installer SPECIFICATIONS Power Handling 126 Watts ch power handling 42 watts ch RMS of steps 12 steps including Off Total Attenuation 43db Frequency Response 20Hz 20kHz 1 5dB at rated power Impedance Multipliers 1X 2X 4X and 8X Terminations Spring loaded terminals Wire Size Up to 14 gauge wire Dimensions 6 0W x 6 5D x 1 875H inches 15 2 x 16 5 x 4 8 cm Weight 2 5 Ibs 1 14kg WARRANTY All Russound volume controls are fully guaranteed against all defects in materials and workmanship as long as the original purchaser and user of the volume control owns the unit During the warranty period Russound at its option will replace or repair any defective part an
7. n running speaker wires inside 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 Russound dealer building contractor or local building and inspection department if unsure about which type of wire is best for your application If you need speaker wire we recommend you order Russound AW series wire The AW Series speaker cables use multi strand copper wire and high temperature PVC jackets specially designed for snaking through the walls and for long speaker runs OPTIONAL RUSSOUND COMPONENTS The wiring diagram for the TBL 75 includes an ALTx and optional EZB 1SC The EZB 1SC is recommended but not required for TBL 75 installation The EZB SC connecting block is a neat compact wiring device capable of connecting four volume controls to an amplifier s outputs The ALTx volume control is an in wall stereo volume control WIRING INSTRUCTIONS 1 Connect the speaker leads from the amplifier s outputs to the connector labeled Input on the TBL 75 The wires should stay consistent left of the amplifier to left Input of the TBL 75 observing polarity and identification CAUTION Do not reverse the input and output connections on the TBL 75 2 Connect speaker wire from the TBL 75 Output connector to the speakers WIRING INSTRUCTIONS USING OPTIONAL EZB1 SC 1 Connect
8. ticular purpose to any person other than the original purchaser and user Russound sells products only through authorized Dealers and Distributors to ensure that customers obtain proper support and service Any Russound product purchased from an authorized dealer or other source including retailers mail order sellers and online sellers will not be honored or serviced under existing Russound warranty policy any sale of products by an unauthorized source or other manner not authorized by Russound shall void the warranty on the applicable product All Russound TBL 75 volume controls conform to UL Standard 1492 First Edition and for Canada Certified to CSA Standard 22 2 No 1 M94 This certification assures that your TBL 75 volume control has been designed and tested for safety R Russound 5 Forbes Rd Newmarket NH 03857 Tel 603 659 5170 Fax 603 659 5388 e mail tech russound com Rev 1 06 10 04

TBL-75

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