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P90sa About Us | View our other itemsNVA P90sa PASSIVE PREAMPLIFIERThe flagship pre-amp of the black box series. This replaces the pair of standard volume pots (the same type as used on the standard P90) with a pair of stepped attenuators. Whilst these take longer to run-in vs the standard volume pot – each setting on the volume control has its own resistor after all – the wait is well worth it. That musical window is now even wider. All 6 inputs are identical and hardwired to the selector switch using silver alloy cable with PTFE cover. The output of the switch is routed to the potentiometer and tape socket again with the silver alloy cable. The separate left and right volume controls are a very high quality Shinkoh/Elma 24 step mono attenuator. The signal is routed by using silver alloy cable. There are three sets of output sockets in parallel to facilitate single / bi / tri-amping.NVA P90sa Specifications: Controls – Left and right volume control and source select Inputs – Six line level and directOutputs – Three pairs of ‘pre-outs’ for single / bi / tri amp support – plus tape outputDimensions – w360mm x h65mm x d210mm”With a good Compact Disc player upstream, one that was able to reveal nuances and low level information, the P90 gave a graphic account of what was present on discs. It was similarly dextrous when handling dynamic variations in the music.”NVA CustomerFor turntable use you must use an NVA Phono1 or Phono2 external phono stage or equivalent or buy the P90sa version with inbuilt phono stage. Not all Power Amplifiers are suitable for use with a Passive Pre-Amp and the manufacture should be contacted to assess suitability. Warranty is for two years parts and labour and after that a further three years it will be repaired on a no profit / cost basis.WHY GO PASSIVE?With the increasing use of CD as primary source, the need for traditional pre-amplification recedes. Line-level sources such as CD, tuner and tape normally have sufficient output to drive power amplifiers. All you then need worry about is the number of inputs provided since a passive preamp is simply a potentiometer placed between the source component and the power amplification. Proponents of passive preamps point to their simplicity; those who argue for traditional active preamplifiers point to potential difficulties interfacing passive preamps with certain kinds of interconnect cables and power amps which may present the wrong electrical characteristics. There is truth in both arguments. NVA claims to have been one of the first manufacturers to market a passive preamp way back in 1983. Interestingly, the development was not driven by the widespread usage of CD, as the date might imply: according to NVA’s owner and designer, Richard Dunn, `It has always been our view that circuitry should be kept as simple as possible. We developed a passive simply because it offers better sonic performance.’When NVA switched to a passive preamp (with phono stage, of course), the company also changed the input stages of their amps to offer the correct load to the potentiometer. NVA’s P90 is built into a Perspex box, epoxy glued together – NVA is part of the school that believes magnetic boxes are a bad thing – that most people either love for its solidity, or hate for its Spartan simplicity. And, by gluing rather than screwing, even the tiniest eddy currents are eliminated. Inside, there’s no circuit board, just a potentiometer, a high quality switch and some expensive silver alloy wire. The other main design aim was to provide good earth paths. Ground plane earthing is used, which the manufacturer believes is superior to the more fashionable star-earthing used in many better known amplifiers.Important Information – Read Before OrderingPlease note all NVA products are built to order so therefore there will be a delivery delay as the production and testing is scheduled. Average delivery time is five to seven days but can on occasion go to 10-14 days depending upon order pressure.NVA offer a 100% trade in value on our products. If you trade up within the NVA range of products within two years of your purchase date (only applicable to direct sales from us or through eBay). After that date we will still trade in your item but on a sliding scale as to age and condition of the item. You must print out and keep your eBay receipt or invoice to verify your purchase date. This service and offer is quite unique in the world of audio and hifi.
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Category: Sound and Vision:Home Audio and HiFi Separates:Amplifiers and Pre-Amps
Location: Sidcup