Nene Valley Audio A40, P50, Phono1 Mono Blocks / Complete Analog Sys.

Offering a complete setup from NVA, 2  40w mono blocks, 1 passive preamp, 1 phono preamp, 4m speaker cables, 2 pair of .5m rigid coax interconnects, 1m phono coax interconnects and 1 pair of 1m rigid coax interconnects.** Due to the design of the electronics you must use the passive preamp and the low capacitance cables.**

NVA has a unique design philosophy that would put many a high-end
manufacturer to shame:

• The cases are made entirely of non-magnetic materials: anodized aluminum,
  wood and smoked plexiglass.
   
  


• The case sides are bonded together with structural adhesives to avoid the
  magnetic contamination of steel screws.
   
  


• The circuit boards are similarly bonded to wood strips, themselves bonded to
  the thick anodized aluminum case bottom.
   
  


• The output transistors, beefy 10 amp Darlingtons, are also bonded to the
  case bottom, which acts as a superb heat-sink.
   
  


• No surprise. The diode bridge is also bonded to the case bottom, as are the
  power supply caps.
   
  


• Internal high current wiring from the power supply is uncoated, stiff
  solid-core coated copper of approximately 14 gauge. A real bus. No coating beats
  even Teflon. The resulting girder-work makes any NVA kit amp a unique
  proposition to look at with the lid off. However, pre-assembled amps are glued
  shut to keep out the curious.
   
  


• The input selector switch, where fitted, is wired to the input RCA jacks
  with teflon-coated, plated copper wire, as is the connection from selector
  switch to the volume control and thence to the input on the circuit boards. A
  small compromise.
   
  


• The volume control is of pure cermet type for minimal aural impact, even if
  it may feel coarse to the touch. The pot's tracks are linear to achieve close
  channel tracking, with a resistor added to simulate a log law.
   
  


• No attempt is made to add output compensation networks, such as an inductor
  or parallel capacitor network or even fusing. Therefore, the amplifier is not
  unconditionally stable, and requires low capacitance speaker cable. NVA's
  LS1 is a superb choice. It has a separate positive and negative cable for
  each channel to minimize capacitance, about 7pF per foot, and is made up
  of seven individual silver alloy solid core conductors per cable in a black
  woven sheath terminated in the new safety-inspired European Union banana plugs.
  
   
  


• 
  NVA assumes that you as the owner will read, understand and heed the
  caveats regarding speaker wire and not short-circuiting the outputs, in order to
  obtain truly high-end performance at a fraction of its normal cost. Remember,
  the payoff is wonderful sound.
   
  


• There are NO adjustments for DC balance or output bias current
  settings -- nothing to go wrong or drift with age. Nevertheless, the amplifiers
  are direct-coupled, no coupling capacitors to colour the sound. All circuit
  board electrolytics are bypassed by large value polystyrene caps, to
  filter the supply over a wide band.
   
  


• All NVA amps are quiet -- extremely so.