Perreaux SM6/P Features, Special Design Features

7	Special Design Features
Rugged Build	Mechanical strength has been a hallmark of Perreaux products since the
Quality	company first started production back in 1974. The concept behind the physical
	design and construction is that each structural member should contribute to both
	rigidity and performance.
Balanced	The SM6 is a truly balanced preamplifier, from input to output. The positive
Design	and negative halves of the signal never touch, remaining balanced throughout all
	stages. This circuit topology offers the ultimate in performance, providing
	increased noise rejection and lower levels of distortion.
Class A	Four discrete output stages operating in Class A provide output buffering. This
Output	enables low impedance loads to be driven, over long cable lengths using any
	cable.
Multiple	There is a separate power supply for each section of the preamplifier. One for
Power	each of the volume control chips (two chips are used to keep the system fully
Supplies	balanced and therefore, to maintain separation, each chip is supplied with it’s
	own separate power supply), another one for each of the output buffering stages
	(once again because the SM6 utilises a fully balanced circuit topology), another
	for the digital logic and the final power supply looks after the input relays. The
	advantage of this is that there is complete isolation from stage to stage. The
	digital noise is kept completely out. This is further evidence of a thoroughly
	designed product offering.
Wireless	Many audiophile grade components are still provided with analogue controls
Remote	that are adjusted on	the faceplate of the unit. While total control from the
Control	remote is common practice in standard products, and so it should be on all
	products, it is not yet widely utilised on many high-end systems. Obvious
	advantage is that you don’t have to get out of your chair to make an adjustment.
	Some of the functions available are: mute, volume up/down, display on/off,
	input select and balance.
Earthing	Perreaux engineers pay particular attention to designing the product to ensure
	maximum separation between internal signal and power earths, only meeting at a
	central starred point.
Precision	The SM6 uses two digitally controlled resistor ladder volume controls. This is
Volume	because we treat the positive and negative parts of the signal separately (true
Control	balanced topology).	The advantages of using a digitally controlled analogue
	resistor ladder to adjust volume are precise control, no contacts to corrode
	creating wiper noise and no analogue component drift.
Dual Outputs	You do not need to purchase an RCA style splitter if you want to drive two
	separate power amps simultaneously, as there are dual parallel preamplifier
	outputs.

19