darTZeel NHB-108 One Owner's Manual
Also see for NHB-108 One: User manual
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darTZeel NHB-108 model one Owner's Manual Page 14 of 17Alternatively, maybe your room is toobig, and that even with your old 1200watts per channel powerhouse amp,there was only just enough volume?In such a situation, please do nothesitate to consult us. We will try tohelp you find a solution.B) The volume setting of your preampli-fier is close to maximum.This can occur if you use either a pas-sive or a low gain preamplifier.The darTZeel NHB-108 model one has again of 26dB, which is slightly lower ñtwo times ñ than usual. If you thinkthat the preamp you are using is thepreamplifier you want to die with, wecan adjust, to a large extent, the gainof the darTZeel NHB-108 model one, forappropriate matching.However, this is a delicate task andmust be done by a qualified personwith a well-equipped workshop.7.2.6. Sound too loudPlease realize that the sound of adarTZeel NHB-108 model one can never betoo loud!More seriously, you could find yourselfalways using the volume control of yourpreamplifier in the first quarter of its fullrange, while getting high sound levels.We can also decrease the gain of youramplifier to suit your high gain preampli-fier. Please note however, that we sug-gest you consult us before thinking ofsuch a modification.7.2.7. Blinking EyesA) Eyes blink at cold power ON. If yourlistening room is at a temperature be-low 65∞F (18∞C), this could be consid-ered as normal, provided that this be-havior disappears in the following 3 to5 minutes.In a room at a temperature above65∞F (18∞C), blinking eyes indicatethat your darTZeel NHB-108 model onecould do with some tuning. However,if this behavior ceases after 3 to 5minutes, and especially if you can putup with it, no adjustment is manda-tory.B) Eyes blink after several hours, whenthe machine is hot, or even very hotIf your room temperature is above90∞F (32∞C), this can be consideredas normal behavior, and normally theeyes should stop blinking as soon asthe ambient temperature return to"human being" levels.Please also check that your darTZeelNHB-108 model one is properly venti-lated, as indicated in chapter 4.1. "Lo-cation" and that you are not using itat quasi-permanent power clippinglevels with 4Ω loads.If the ambient temperature is under90∞F (32∞C) but the Eyes blink, yourmachine needs some tuning.To cut a long explanation short,darTZeel's eyes should not blink in ambi-ent temperature ranges from 65∞F to90∞F (18∞C to 32∞C). If they do, the am-plifier needs some adjustment.In all cases it is important to know theworking environment in which you willuse your darTZeel NHB-108 model one.If you live at the South Pole or on theEquator, a slightly different setting couldbe necessaryÖ.Furthermore, in big ambient temperaturechange conditions, we strongly recom-mend using the version B of the darTZeelNHB-108 model one.If you need to know more about thistopic, can you guess what? Yes, read theAudiophile's technical manual.7.2.8. Melting Fuse(s) at power ONThe darTZeel NHB-108 model one featuresa Crowbar inhibiting circuit working atpower ON. During the first 20 millisec-onds, no Crowbar operation will occur,avoiding blown fuse(s) if bumps greaterthan 2 volts are detected.However, if you power your machine ONagain, immediately after having poweredit OFF, it is possible that it will eventuallytrigger the Crowbar circuit, and lead tomelted fuse(s). In such a case, you willhave to change the blown fuse(s) as de- |
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