NAD M2 Direct Digital integrated amplifier Associated Equipment

NAD M2 Direct Digital integrated amplifier Associated Equipment

A decade ago, many predicted that amplifiers with switching or class-D1 output stages would come to dominate high-end audio. In a post&#150;Peak Oil world in which the price of energy would always continue to rise, a class-D amplifier's very high efficiency in converting AC from the wall outlet into speaker-driving power would be a killer benefit. Although a conventional push-pull class-B amplifier has a theoretical efficiency of 78.5%, which would seem usefully high, this efficiency is obtained only at the onset of clipping; the need for the output devices to carry a standing bias current reduces that efficiency considerably, typically to around 50%. Class-A amplifiers are even less efficient, with a maximum of 25%; <I>ie</I>, three times as much power is dissipated by the amplifier as waste heat as is used to drive the loudspeaker (see "Sam's Space" in this issue).

NAD Electronics International
633 Granite Court
Pickering, Ontario L1W 3K1
Canada
(800) 263-4641
www.nadelectronics.com

NAD M2 Direct Digital integrated amplifier Specifications

NAD M2 Direct Digital integrated amplifier Specifications

A decade ago, many predicted that amplifiers with switching or class-D1 output stages would come to dominate high-end audio. In a post&#150;Peak Oil world in which the price of energy would always continue to rise, a class-D amplifier's very high efficiency in converting AC from the wall outlet into speaker-driving power would be a killer benefit. Although a conventional push-pull class-B amplifier has a theoretical efficiency of 78.5%, which would seem usefully high, this efficiency is obtained only at the onset of clipping; the need for the output devices to carry a standing bias current reduces that efficiency considerably, typically to around 50%. Class-A amplifiers are even less efficient, with a maximum of 25%; <I>ie</I>, three times as much power is dissipated by the amplifier as waste heat as is used to drive the loudspeaker (see "Sam's Space" in this issue).

NAD Electronics International
633 Granite Court
Pickering, Ontario L1W 3K1
Canada
(800) 263-4641
www.nadelectronics.com

NAD M2 Direct Digital integrated amplifier Page 3

NAD M2 Direct Digital integrated amplifier Page 3

A decade ago, many predicted that amplifiers with switching or class-D1 output stages would come to dominate high-end audio. In a post&#150;Peak Oil world in which the price of energy would always continue to rise, a class-D amplifier's very high efficiency in converting AC from the wall outlet into speaker-driving power would be a killer benefit. Although a conventional push-pull class-B amplifier has a theoretical efficiency of 78.5%, which would seem usefully high, this efficiency is obtained only at the onset of clipping; the need for the output devices to carry a standing bias current reduces that efficiency considerably, typically to around 50%. Class-A amplifiers are even less efficient, with a maximum of 25%; <I>ie</I>, three times as much power is dissipated by the amplifier as waste heat as is used to drive the loudspeaker (see "Sam's Space" in this issue).

NAD Electronics International
633 Granite Court
Pickering, Ontario L1W 3K1
Canada
(800) 263-4641
www.nadelectronics.com

NAD M2 Direct Digital integrated amplifier Page 2

NAD M2 Direct Digital integrated amplifier Page 2

A decade ago, many predicted that amplifiers with switching or class-D1 output stages would come to dominate high-end audio. In a post&#150;Peak Oil world in which the price of energy would always continue to rise, a class-D amplifier's very high efficiency in converting AC from the wall outlet into speaker-driving power would be a killer benefit. Although a conventional push-pull class-B amplifier has a theoretical efficiency of 78.5%, which would seem usefully high, this efficiency is obtained only at the onset of clipping; the need for the output devices to carry a standing bias current reduces that efficiency considerably, typically to around 50%. Class-A amplifiers are even less efficient, with a maximum of 25%; <I>ie</I>, three times as much power is dissipated by the amplifier as waste heat as is used to drive the loudspeaker (see "Sam's Space" in this issue).

NAD Electronics International
633 Granite Court
Pickering, Ontario L1W 3K1
Canada
(800) 263-4641
www.nadelectronics.com

NAD M2 Direct Digital integrated amplifier

NAD M2 Direct Digital integrated amplifier

A decade ago, many predicted that amplifiers with switching or class-D output stages would come to dominate high-end audio. In a post–Peak Oil world in which the price of energy would always continue to rise, a class-D amplifier's very high efficiency in converting AC from the wall outlet into speaker-driving power would be a killer benefit. Although a conventional push-pull class-B amplifier has a theoretical efficiency of 78.5%, which would seem usefully high, this efficiency is obtained only at the onset of clipping; the need for the output devices to carry a standing bias current reduces that efficiency considerably, typically to around 50%. Class-A amplifiers are even less efficient, with a maximum of 25%; ie, three times as much power is dissipated by the amplifier as waste heat as is used to drive the loudspeaker (see "Sam's Space" in this issue).

Recording of March 2010: Neil Young Official Release Series, Discs 1–4

Recording of March 2010: Neil Young Official Release Series, Discs 1–4

<B>Neil Young: <I>Official Release Series, Discs 1&#150;4</I></B><BR>
Reprise 519173-1(4 LPs, Limited Edition Vinyl Boxed Set). 2009. Neil Young, David Briggs, Elliot Mazer, Jack Nitzsche, Henry Lewy, prods.; John Nowland, reissue eng. AAA.

Rediscovering the Faith

Rediscovering the Faith

I may have had 4000 LPs and a perfectly wonderful <A HREF="http://www.stereophile.com/turntables/1103linn">Linn LP12</A> turntable, but I could go for weeks on end without listening to a single LP. But I still thought of myself as one of the vinyl faithful, even as I rationalized my digital-centric listening tendencies. I loved analog <I>in theory</I>&#151;I just couldn't bring myself to listen to it all that much.

Advertisement
Advertisement
Advertisement