darTZeel NHB-10 model one Technical Manual

darTZeel NHB-10 model one Technical Manual Manual pdf 24 page image

darTZeel NHB-108 model one Audiophile's technical manual Page 24 of 28Furthermore, in normal use, say if yousometime power OFF your machine, lifespan can be easily doubled, or evenquadrupled.As soon as we realize that working tem-perature is the most long lasting factor,it becomes easier to choose componentsfor their sonic attributes first.Another factor, even less known but veryinteresting, is that of sustaining biaspowering. A given component, being ac-tive or passive, lasts longer if some volt-age, however low it is, remains appliedto its terminals. For electrolytic capaci-tors, this small "polarizing" voltage evenkeeps their internal electrolyte in perfectchemical working condition, greatly re-ducing the "warming time" usuallyneeded with other gear.All these reasons led us to keep thedarTZeel NHB-108 model one powered ataround 5 volts (instead of 60), evenwhen shut OFF, by pressing the PowerNose. Your amplifier is then always gen-tly permanently energized, extendingeven further its life span, and attainingmuch more quickly the full performancethe amplifier can deliver to your ears.It is also the reason why you can stillhear some music through the darTZeelNHB-108 model one even when it ispowered OFF. Incidentally, the fact thatthe amp can sing with such a low voltagedemonstrates how simple the audio cir-cuit really is…In case you are worried about this, thepower consumption of the "power OFF"mode is around 2 watts. It representsaround $5.33 per year, assuming that akilowatt/hour costs $0.33. This means$160 after 30 years. It is not too high aprice to pay compared to changing thecapacitors more frequently! Bear in mindthat producing new capacitors pollutesmore than keeping them energized…With all sonic benefits.9.2. Long term availability9.2.1. Spare partsTo own a darTZeel NHB-108 model onemust not only give you musical pleasure.You must also benefit from a first classcustomer service, whatever the problemencountered. Whether it is a failed com-ponent, or a broken heat sink due to anunfortunate accident – not dropped onyour feet we hope – all parts need to beavailable, at anytime.If, as we think, your machine only re-quires maintenance every 30 or 40years, we will ensure that parts availabil-ity will last far beyond that.We at darTZeel, always stock all "nonperishable" components in sufficientquantity for – very – long term opera-tion.Semiconductors and passive componentswith no instable material inside are stoc-ked, and will be available at any time, inbrand new working condition.As for electrolytic capacitors, however,their preservation is much more delicatewhen one tries to stock them for 30 or40 years in brand new working condition,their life span being limited even whennot in use.Fortunately, we have chosen industrialmodels, of the highest quality, from oneof the world’s biggest and longest estab-lished manufacturers. We can bet thatthey will still be there in 100 years, andthat they will continue to offer equallyoutstanding capacitors, or perhaps evenbetter ones.Furthermore darTZeel keeps permanentlyin touch with the industry, with the aimof anticipating any shortage or ending ofproduction as regards every componententering into the building of the darTZeelNHB-108 model one. In the worst case,"perishable" stock will be renewed ac-cordingly in order to offer maximumavailability at brand new specifications.Our wish is to be capable of offering youtrue and full customer service for at least120 years after your purchase date.9.2.2. Self-preservation instinctOne hundred and twenty? Are they kid-ding at darTZeel's? Or are they just beingpretentious?Yes, we only said that it is our wish. Buthere again, we have done our very bestto make our wish a reality.