Music Hall DAC 25.3 Black USB Digital Audio Converter DAC 25.3 Black User's Manual
Contents
1. Headphone output levels eeucuse seno zoe trn radere nde egre ad cx kk nu Rad ne 4V max Headphone output resistance eeeeeeeeeeeeseeeee nennen nnne nan 0 3 ohm es gd opo rM RT AC115V 60Hz 230V 50Hz Ti PCM1796 24bit 192kHz DAC Philips 74HC574 Ti SRC4192 Asynchronous Sample Rate Converter w high precision active crystal oscillator master clock 1 x 6922 Electro Harmonix tube Physical DIMENSIONS ieu ioco etg eo euni nato npe inen ene re Enc nun WxDxH 8 5 x 13 5 x 3 75 in Mr eer 10 Ibs Pkg Supplied ACCESSORIES race ueneno eren a ra Gne don ioa Ea cna Mains Lead USA This product complies with FCC requirements Guarantee This entitles you to have the music hall dac25 3 repaired or replaced at our discretion free of charge for one year after purchase at any authorized music hall dealer provided the unit was purchased from an authorized dealer Your original sales receipt is used as proof of purchase date Music hall can take no responsibility for defects arising from accident misuse abuse wear and tear neglect or through unauthorized repair and or adjustment Neither can music hall accept responsibility for damage or loss occurring during transit to or from the person claiming under the guarantee Warranty Your music hall dac25 3 warranty covers parts and labor costs for one year from the purchase date After one year you must pay for both parts and labor costs The warranty d2. et hands 3 Object or liquid entry Do not allow foreign objects or liquids into the unit If this happens immediately disconnect the power cord from the wall and take the unit to an authorized music hall service center for inspection 4 Ventilation You must allow 2 inches 5 cm of unobstructed clearance around the unit Do not place the unit on a bed sofa rug or similar surface that could block ventilation from the bottom Do not stack another component on top of the amplifier If the component is placed in a bookcase or cabinet it must be ventilated to allow proper cooling 5 Heat Keep the unit away from naked flames radiators heat registers stoves or any other heat producing appliances including amplifiers 6 Climate The unit has been designed for use in moderate climates Do not attempt to use below 41 degrees Fahrenheit 5 degrees Celsius or above 95 degrees Fahrenheit 35 degrees Celsius 7 Rack and Stands Place the unit on a fixed level surface strong enough to support its weight Do not place it on a moveable cart that could tip over We recommend only using stands approved for use with audio equipment 8 Cleaning Unplug the unit from the mains supply before cleaning The case should normally require only a wipe with a soft lint free cloth 9 Power Sources Only connect the unit to a power supply of the type and voltage described in the operating instructions or specified on the rear panel of
3. from the computer and then re insert it Watch the computer monitor for an indication it has found the hardware Apple computers may not automatically recognize the dac25 3 Apple users check your System Preferences as suggested above If the lock light is lit and you re not getting any output plug in a set of headphones and turn up the volume to hear if you re getting any output If you are getting output through the headphones and you ve verified that your cable is good and properly connected to the correct input on your preamp integrated or receiver it s possible the tube is not properly seated in the tube socket or it has failed If you are familiar with tubes and comfortable checking it please do If not call your dealer or music hall for guidance Technical Specifications jupe 0 0496 Tube out 1KHz 0 001596 Balanced out 1KHz OUTPUE leveli c 2 0V Frequency TESPOMSEE ta cece send wine coviede cede ucecebees dunes deine rade diana 2Hz 20KHz 0 2dB p gt 110dB es aie Eco T 30W Dynamic ez Ine PEU gt 120dB 24 bit gt 964GB 16bit pcc da 110dB Operating temperatule 5 inm ore Pepe rara ret vea rtt aa a edd paa avv reg RE 0 40 C USB inp t rcr supports 24 bit audio at sample rates up to 96kHz All other inputs accept 24 bit audio at sample rates up to 192kHz
4. ic hall welcome your questions and comments Save the shipping carton and all enclosed packing material for future use Shipping or moving the unit in anything other than the original packing material may result in severe damage that is not covered by the warranty Be sure to keep the original sales receipt It is your best record of the date of purchase which you will need in the event warranty service is required Placement Use common sense when placing the dac25 3 Always place it on a firm level surface Make sure that the shelf or cabinet can support the weight Ensure that there is adequate ventilation around all sides of the unit Avoid placing the dac25 3 where it may be subject to excessive heat such as near a heat register Do not place anything on top of it For best performance avoid placing the dac25 3 where it may be subject to vibration such as near a speaker Digital In Connecting Source Components to the dac25 3 A A MODEL dac25 3 E C VOLTAGE SELECTOR Qu SERIAL NO Designed and developed in the USA AUDIO OUT DIGITAL IN XLR 3 19 4 T1AL 250V The dac25 3 has 4 digital inputs coax s pdif optical USB and XLR Connect your source components to the appropriate inputs on the back of the dac25 3 You can connect one or all four inputs at the same time Choose between the inputs using the input selector button on the front panel Special
5. music hall dac25 3 usb tube 24bit 192kHz digital to analog converter INSTRUCTION MANUAL music hall http www musichallaudio com Congratulations on Your Purchase You have selected a state of the art digital to analog converter DAC Each component chosen for assembly and construction of the music hall dac25 3 was selected to provide you with superior performance and the highest level of sound reproduction available today We know of no digital to analog converter that costs as much to produce that sells for so little Please take a few moments to read over the instruction manual to ensure that you get the best performance from your unit and years of trouble free service Safety Guidelines This product is designed and manufactured to strict quality and safety standards However you should be aware of the following installation and operation precautions 1 Take heed of warnings and instructions Read all the instructions before connecting or operating the unit Keep this manual so you can refer to these safety instructions Heed all warnings and safety information in these instructions and on the unit 2 Water and Moisture To reduce the risk of fire or electric shock do not expose the unit to moisture or water If the unit is exposed to moisture immediately disconnect the power cord from the wall Take the unit to an authorized music hall service center for inspection Do not touch the unit power cord or plug with w
6. note When using the USB input with your computer the dac25 3 and your computer should both be powered up Your computer will recognize the new hardware and self install the necessary drivers Connect the USB cable to the dac25 3 from your computer prior to launching your audio player software iTunes Windows Media Real Media etc If you haven t followed this instruction close your audio player software then re launch You will probably find that setting your audio player s and computer s volume to max will sound best Apple Computer Users With both your computer and the dac25 3 powered on connect the USB cable Go to System Preferences Sound Output choose the USB Audio DAC for output Close System Preferences Launch iTunes Audio Out To avoid damage to the dac25 3 make sure it is NOT plugged into an AC outlet while connecting up or disconnecting either of the audio outputs The dac25 3 has two sets of fixed audio outputs on the back One single ended set labeled RCA R and L And one balanced set labeled XLR R and L Connect the RCA or XLR audio outputs to the correct audio inputs on your integrated amplifier preamplifier or receiver The phones headphone output on the front is variable Connecting to the Mains Plugging In Check that the Power Switch on the front of the dac25 3 is in the off position Look at the voltage selector slider on the back of the unit and confirm that it is set for the correct vol
7. oes not cover transportation costs at any time Claims under guarantee The unit should be packed in the original packing and returned to the dealer from whom it was purchased or to an authorized music hall service center It should be sent by a reputable carrier carriage prepaid Do not send the unit via USPS United States Postal Service No responsibility can be accepted for the unit while in transit to the dealer customer or authorized service agent therefore customers are advised to insure the unit against loss damage or theft while in transit y RoHS AK c compliant For further details contact Music Hall LLC 108 Station Road Great Neck NY 11023 Tel 516 487 3663 Fax 516 773 3891 http www musichallaudio com
8. rce feeding the dac25 3 First check to make sure your preamplifier integrated amp or receiver is Switched to the same input the dac25 3 is connected to Test the connection and the cables to make sure Keeping the input selected and using the same cable connect this input to a known good source like a tuner or the analog output of a CD player If that works then it is most likely not a connection problem between the dac25 3 and the preamp integrated amp or receiver The next step is to check and see if the digital input is properly connected Look on the front panel of the dac25 3 to see if the lock light is illuminated If it is not this is most likely the problem Push the input selector and toggle through all the inputs to see if one locks If one does not lock you either have a bad digital cable or you aren t getting a good digital signal Try replacing the digital cable on the input you ve selected For instance if you are using a coax connection try replacing the coax cable with another coax cable If this doesn t work try selecting a different input optical for instance and try using the CD player s optical output with an optical cable instead If you are using a USB connection it is necessary for the computer to recognize the dac25 3 as a connected device Check in the computer s control panel under USB devices and see if the dac25 3 is recognized If not with both the dac25 3 and your computer powered up remove the USB cable
9. s a CD DVD transport iPod transport computer media server Sonos Squeezebox DVD in stereo and will output two channel stereo analog When used with your computer or in a top end audio system your music hall digital to analog converter will provide years of listening enjoyment The dac25 3 features the latest Texas Instruments formerly Burr Brown PCM 1796 24bit 192kHz advanced segment stereo audio digital to analog converter This processor features 123dB dynamic range an 8 x oversampling digital filter and just 0 0005 THD The dac25 3 upsamples to either 96kHz or 192kHz user selectable on the front panel To achieve the best sound we use an advanced asynchronous reclocking and anti jitter control system upstream of the PCM1796 digital to analog converter For this system we are using the Philips 74HC574 in conjunction with the Texas Instruments SRC4192 Asynchronous Sample Rate Converter whose master clock is a high precision active crystal oscillator The dac25 3 also features a large high current oversize power supply and a tube output for warm rich sound A headphone output is provided for convenient personal listening A Few Precautions Please read this manual carefully In addition to installation and operating instructions it provides valuable information that will help you get optimum performance from your system Please contact your authorized music hall dealer for answers to your questions In addition all of us at mus
10. tage 115V USA 230V Europe Push the plug IEC line socket of the power cable supplied with the dac25 3 into the socket AC IN on back of the unit Make sure it is pressed in firmly Plug the other end of the power cable into an AC wall outlet Using the dac25 3 music hall volume coa opt usb xlr lock 96k 192k phones 0000 000 on off input src dac25 3 digital to analog converter V power on off Push this button on the front of the dac25 3 to turn the unit on Pushing it again will switch the dac25 3 off When the dac25 3 is on a blue light will appear on the front panel below the digital input that is currently active If no digital input is active the src lock light will flash input Use this button to toggle between the digital inputs coa opt usb xlr src sample rate converter upsampling Use this button to toggle between the different sample rates Lock locks at input audio bit rate and sampling rate upsampling off bypasses SRC4192 96k 24bit 96kHz upsampling on 96kHz 192K 24bit 192kHz upsampling on 192kHz Decide which sample rate sounds best on your system by listening phones 1 4 headphone output volume Controls volume of the headphone output only Troubleshooting If no sound comes out of the system with the dac25 3 connected there are several areas to check Either you are not getting an audio signal to your preamplifier or you don t have a good digital sou
11. the unit 10 Power cord protection Connect the unit to the power outlet only with the cord supplied Do not modify the supplied cable in any way Do not attempt to defeat grounding and or polarization provisions Do not use extension cords Do not route the power cord where it will be crushed pinched bent at severe angles exposed to heat or damaged in any way 11 Non use periods If the unit is to be left unused for a long period of time the power cord should be unplugged from the wall outlet 12 Damage Requiring Service Stop using the unit immediately and have it inspected by an authorized music hall service center whenever 1 The power supply cord or plug has been damaged Liquid has been spilled into the unit The unit has been exposed to rain The unit does not operate properly The unit has been dropped or damaged Smoke or any unusual smell is detected from the unit 9v Ur ie p m CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL Getting Started Thank you for purchasing the music hall dac25 3 The dac25 3 is a tube digital to analog converter DAC designed for the music lover We chose a select group of technologically advanced components to create this sophisticated digital to analog converter The dac25 3 can accept any coax s pdif USB XLR or optical digital input from one of music hall s compact disc player
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