Manual - AudioControl
Contents
1. headroom and the best signal to noise ratio Please note that the input level control is capable of up to 21dB of gain while the output level control is attenuate only This minimizes the chance of system gain noise due to excessive gain at the receiving end of the balanced line These balanced line converters are also very useful for converting signal levels between the high level balanced signal of professional audio equipment and the lower level unbalanced signal of consumer audio Here are some example settings for common installations Input Output System Gain Level Consumer to Consumer 10dB 10dB Consumer to Pro Balanced Input 10dB Not Used Pro Balanced Output to Consumer Not Used 10dB Balanced Line Series Specifications Specification are subject to change and improvement Chanels erisa era cae Rte het ied del aa ee EY 4 Configurations BLD 10 4 ch Unbalanced to Balanced Conversion BER I0 sev aisree Ria nate adh 4 ch Balanced to Unbalanced Conversion BLX JO vee tv dante tenti 2 ch Bal to Unbal 2 ch Unbal To Bal Headroom sincere E eet toed ead eee ey 10 dB Signal to Noise 20 20k 00 000000005 95 dB ref 1 v Channel Separation 000 Greater than 75 dB 1 kHz CMRR ns elie d ase le dest deecio ERES Greater than 68 dB 1 kHz Unbalanced Signal Level 66 c cece eee ees 3 V ms Max Unbalanced Input Impedance 00 0 e eee ee2. prove that such a handy piece of audio equipment was really in the system IMPORTANT For the best product performance and the lowest use of pain killers nothing is better than a well planned professional system installation Before you start pulling wires sketch out a full layout of the complete system This will help plan the wire routing and minimize the gotchas later on Happy installing Installation Notes Mounting The Units The small size and low power draw of these units allow them to be mounted in almost any dry indoor location Pick locations close to the unbalanced units that will be connected to the driver or receiver This keeps the unbalanced RCA cables as short as possible since they are more susceptible to noise pickup than the balanced lines There is no heat build up problem if you need to put the unit into a closed area but remember you need to at least be able to reach the units to plug in the wiring block Important Note When routing the 24 volt AC power wiring from the wall plug transformer make certain that you do not run it near or parallel to the unbalanced RCA cables You may pick up AC hum Wiring The System Audio Wiring The Balanced Line system operates using standard unshielded twisted pair wiring You can use solid or stranded category 5 cabling in most installations In areas that are known for severe RF noise like downtown Manhattan you may need to use a shielded multi pair cable such as Bel
3. 100 kohms Unbalanced Output Impedance n nannan nananana 250 ohms Unbalanced Audio Connector 0 0 00 RCA Balanced Signal Level 0 c cece eee eee 3V ms Max Balanced Input Impedance ananananannn nanne 20k ohms Balanced Output Impedance 00 0000 150 ohms Balanced Audio Connector Euroblock 12 24 awg POWOr SUPPLY eeina AE E E 24 VAC Current Draw ecri 264 566 c4eese dud oetedider et bt ed ete dota 40 mA WISI a ainne siea ena aud hes ET TRE L EE EE 1 Ib DIMENSIONS oee 0 5 oa es tak Loe ewe ew Ra ee 4 H x 5 2 W x 1 2 D Warranty ai 22s eve dante cae as eee de Mera ee inn ed aes 5 Years Country Of Onin recassa anA hind e bene aes U S A Units are supplied with 24Vac wall plug transformer Audiocontro 22410 70th Avenue West Mountlake Terrace WA 98043 USA Phone 425 775 8461 FAX 425 778 3166 www audiocontrol com 1999 All Rights Reserved P N 990122 1 99 System Examples Extending Components In A Multi Room Installation Power Amplifier i AN Receiver JL Powered Sub Woofer aU OFT The Balanced Line Series provides a noise free method to extend the distance between components in an audio system This allows you to put the amplifiers in the Basement and the source units in the Library or put a CD player in the Master Bedroom and run the audio to your Media Room They are
4. Balanced Line Series B L D E 10 m Balanced Line Driver B L R 10 m Balanced Line Receiver B L X 10 Balanced Line Transceiver Installer Information Congratulations You are installing one of the most innovative custom audio installa tion products available The AudioControl BLD 10 Four Channel Balanced Line Driver BLR 10 Four Channel Balanced Line Receiver and the BLX 10 Two Channel Balanced Line Transceiver These units will help you make any audio system sound it s best by converting between noise ridden RCA cables and a noise Rejecting balanced audio signal Before you charge off into the installation please take a moment to kick back reflect on things and read through this manual Features of the Balanced Line Series e Unbalanced to Balanced to Unbalanced Conversion e Active Balanced Circuitry Eliminates The Need For Lossy Audio Transformers In The Signal Path e Separate Balanced Line Driver And Line Receiver For Quiet Operation Even In Noisy Environments e Allows Easy Extension Of High Quality Audio Signals Up To 1000 305 Meters e Perfect For Separating Amps And Source Units In Multi Room Audio Installations e Uses Standard Inexpensive Twisted Pair Cat 5 Wiring AudioControl making good stereo sound better The Most Important Instruction Of All FILL OUT AND SEND IN THE WARRANTY CARD Also save the invoice or sales slip as proof of purchase These actions will protect this investment and help
5. The output level on the Driver may be set too high 2 A system impedance mismatch from driving too many Balanced receivers from one Balanced Driver A reasonable limit is ten units 3 The signal level feeding into the unbalanced RCA inputs is too high not likely with consumer grade equipment and now a word from the legal department The WARRANTY People are scared of warranties Lots of fine print Months of waiting around Well fear no more this warranty is designed to make you rave about us to your friends It s a warranty that looks out for you and helps you resist the temptation to have your friend who s good with electronics try to repair your AudioControl product So go ahead read this warranty then take a few days to enjoy your new Balanced Line Series component before sending in the warranty card and comments Conditional doesn t mean anything ominous The Federal Trade Com mission tells all manufacturers to use the term to indicate that certain conditions have to be met before they ll honor the warranty If you meet all of these conditions we will warrant all materials and workmanship on the Balanced Line Series components for FIVE YEARS from the date you bought it and we will fix or replace it at our option during that time Here are the conditional conditions 1 Acompleted warranty card must be returned to us within 15 days after purchasing the Balanced Line Series component 2 Asales rece
6. also handy if a powered subwoofer is picking up noise from a long RCA cable run from the surround processor One to Many CD Player Tuner Preamp Up to 1000 Total Length Receiver Background Speaker Amp Channel 1 2 Connecting to a Unit With Balanced Inputs Balanced Output e gt Y N OOO 0 000 00 0 0 0 0 Shield m wv j Shield gt Tip Mj Professional Balanced Tip Input XLR You can use the Balanced Line Series components to convert from 10dB unbalanced RCA to a balanced signal to drive professional audio equipment Make certain that you set the gain controls per the chart on the previous page to bring the signal level up to pro specs Troubleshooting No Power Light 1 Make certain the two wires from the power supply are connected to the 24 VAC connections on the terminal block 2 Double check that the power supply is plugged in and that the outlet has power There is hum in the audio signal 1 Make certain that the system is wired with twisted pair cabling 2 Try turning up the output level on the BLD 10 driver 3 Make certain there is not a cut in the wiring allowing a conductor to short to ground ie shield conduit cold water pipe plenum etc 4 In extreme instances use a shielded twisted pair wire such as Belden 8451 or equivalent The sound is distorted 1
7. den 8451 Good wiring practices will minimize the chance of any noise pickup e Do not run the audio cables next to AC power wiring e If you need to cross over a power wire try to do it at 90 to the other wire e Keep the audio wiring as far as possible from any noise sources such as lighting power supplies fluorescent lights motors etc Grounding If you use a shielded balanced line cable then you need to be careful about ground loops In some instances it is necessary to only connect the shield at one end of the balanced line and NOT at the other end This provides a ground path for noise picked up by the shield but it pre vents a continuous signal ground path between the source and destina tion units Power Wiring The Balanced Line Series components operate from a 24 volt AC wall plug transformer There is no polarity on the power wiring from the transformer so it can connect either way to the connector block on the unit The power draw is very low on these units each unit draws approximately 24 milliamps so you can tap the supply from another 24 VAC transformer if it s handy Helpful Hint If you are installing multiple drivers or receivers in one location the wall plug transformer supplied is capable of powering up to 10 units Just parallel the power connections on each driver receiver and run them to the power transformer Setting The Level Controls Properly adjusting the level controls will give you the highest
8. ipt is required for proof of purchase showing when and from whom the unit was bought We re not the only ones who require this so it s a good habit to get into with any major purchase 3 The Balanced Line Series components must have originally been purchased from an authorized AudioControl dealer You do not have to be the original owner but you do need a copy of the original sales slip 4 You cannot let anybody who isn t A the AudioControl factory or B somebody authorized in writing by AudioControl to service your Balanced Line Series component If anyone other than A or B messes with your Balanced Line Series component that voids your warranty 5 The warranty is also void if the serial number is altered or removed or if the unit has been used improperly Now that sounds like a big loophole but here is all we mean by it Unwarranted abuse is A physical damage don t use the unit for a car jack B improper connections 120 volts into the power jack can fry the poor thing C sadistic things This is the best product we know how to build but if you mount it to the filter pump of a Jacuzzi something will go wrong Assuming you conform to 1 through 5 and it really isn t all that hard to do we get the option of fixing your old unit or replacing it with a new one Legalese Section This is the only warranty given by AudioControl This warranty gives you specific legal rights that vary from state to state Prom
9. ises of how well your Balanced Line Series component will perform are not implied by this warranty Other than what we have covered in this warranty we have no obligation express or implied Also we will not be obligated for direct or indirect conse quential damage to your system caused by hooking up the AudioControl Balanced Line Series components Failure to send in a properly completed warranty card negates any service claims
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