A. INTRODUCTION Thank you for your.purchase of the Krell STEALTH AdvancedOne-Bit Digital to Analog Converter and welcometo the Krell family of audio compo.n.ents. You have joined a select groupof discriminating listeners who enjoy the finest in musicreproduction. Krell ,D, igital is dedicatedto the d~evelopment of techno~1.o.gicady advancedcomponentstor the reproductio.n ot digitally recorded music. These designs continue the Krell tradition of uncompromisingperformancethrough leading-edge technology.
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C, UNPACKINGINSTRUCTIONS 1. Openthe box and removethe top layer of foam. The following items will nowbe visible: STEALTHD/A Converter AC power cord PacKet containing the OwnersReference and warranty card NOTE: If any of these items are not included please contact your authorized dealer immediatelyf6r assistance. 2. Carefully removethe unit and accessories from the box and removethe protective plastic wrapfrom the unit. NOTE: Saveall packingmater.ial.s. If you must ship y.
D. BASIC INSTALLATION AND OPERATION Before you install the STEALTH into your sy.stem we recommend that you follow these g.uidelines in choosing’ the location. This will facilitate a clean, trouble-free installation. CAUTION: Whenmaking connections to this component or any other, makesure tlie poweramplifier is OFFand the preamplifier is in the MUTE or STANDBY mode. 1. Althoughwell shielded, the processor should not be p.laced in close proximity to hum-sensitive components ~i.e.
E. INPUT AND OUTPUT CONNECTIONS 1. Connectthe Stealth analog output to the line level input of your preamplifier. The STEALTH is equipped with two output configurations: Single-ended via RCAconnectors and Balanced via XLRconnectors. If your pr.eamplifier has high lev~ balanced inputs we recommenclthe balanced outputs ot t~.e processorb.e us.ed. Thereare considerablesonic benefits associatecl witt~ the use of this type of interconnection..H.
NOTE:If the digital source is ONand the signal LED does not illuminate, checkto makesure the digital interconnectcable is secure at both ends or is not.in need of repair. NOTE: Care should be taken in selecting the type of cable usedto link the digital source to your processor. If coaxial cable is to be..~used, it shouldbe non-capacitive and have a bandwid~Snexcess of 10MHZ to prevent drop-outerrors. NOT.
F. PROCESSOR OPERATION AND DIGITAL TAPE LOOP 1. Select an input with.the Input switch. Notice the Signal LEDwill illuminate whenthe digital source is turned on and has linked with the processor. Oncethis link is complete the processoris ready to pass a signal. 2. Be sure that your preamplifier’s volumecontrol is completely turned to the OFF(lowest volume)position. 3. Turn ONyour components, rememberingthat the last componentto be energized should be your amplifier.
STEALTH FEATURES DIGITAL TAPE LOOP TheTapeoutput is used as a direct digital output for a digital recordingsystem. Thedigital source you wa.nt to re.cord is selected by:the Input switch. To listen to the clig~ital source select S:ourceon the Source/Monitor. switch. To listen.to th6 Tapeoutput during or after the. recording select Monitoron the Source/Monitorswitcla. NOTE:The Tape input can also be used as an additional source input.
G. QUESTIONS AND ANSWERS Q. MyCDplayer has both fibre optic and coaxial outputs. Whichone should I use? A. Givena choice, we prefer the AT&T optical link due to its ability to completelyisolat,e the groundsbetween the digital source componentanti the Processor. This minimizesthe possibifity of groundloops in the digital components. The optional AT&T format also has the added benefit of substantially higher bandwidththan coax or the standard fibre optic interface.. Q.
Q. I have somevery fine audiophile interconnect cable whichhas superior sonic characteristics. CanI use this ¯ for mycoaxial digital input? A. Youmayexperiment with any high quality cable. Do note, that most audio interconnect cable is not designed" to carry the ultra high frequencyinformationof the digital bit stream. NOTE:For the STEALTH,we recommendnon-capacitive coaxial cable whichhas a bandwidthin excess of 10MHZ and excellent shielding properties. Q.
H. FRONT AND REAR PANEL DESCRIPTIONS 1. FRONTPANEL a. Input Selection: Coax 1 Coax 2 Optics XLR Coaxial input Coaxial input Standardfibre optic input Balanceddigital-input or (Optional)AT&T. fibre optic input; shares XLRinput switch setting b. Source and Monitorselection: Source Monitor Plays the selected input Plays the source connectedto the Digital Tape Input c. AnalogBalancedOutput Phase selection: 0 degree In phase 180 degree Out of phase 2. REARPANEL b.
I. SPECIFICATIONS FREQUENCY RESPONSE 20Hz-20KHz +/- ldB SAMPLING FREQUENCY 8 Times over sampling DIGITAL 18 Bit TO ANALOG CONVERTER ANALOG OUTPUT VOLTAGE 2.1 volts R.M.S. DIMENSIONS 19" Wide 12" Deep 2.
¯ 1. WARRANTY AND SERVICE INFORMATION There are no user-serviceable parts inside the STEALTH: The STEALTH has a limited warranty of fiveyears parts and labor on electronic parts including return freight. The warranty,per!od, begins on ~the date of-purchaseand is activatecl witla tlae retUrn ot the enclosedWarrantyCard and a copy of the Sales receipt. Please return the completed warrantycard immediatelyafter successful installation and operation are completed.
I 0 I 0 DIGITAL INC. / KRELL DIGITAL INC. 35 HIGGINS DRIVE MILFORDCT 06460 SALES203-874-3139 FAX203-878-8373 COPYRIGHT1991 KRELLDIGITAL INC.