The Nagra CLASSIC AMP is a VERY special amplifier, part of a completely new generation at Nagra, built in Switzerland (and looks and feels like it!), and rarely seen for sale in the US. Check out the reviews online and look at the elite show systems showcasing Nagra gear with Wilson, Rockport, among others. Praise has been universal and that's been my experience in my own system. I'm the second owner and it's in great shape, kept protected within a Salamander cabinet.
Payment is by wire transfer or cash. Buyer pays shipping from Sanibel FL 33957, including insurance for full value. Email to tom dot schmidt0 at gmail dot com or text/phone to 26zero-4zero3-zero898.
Link to manufacturer's site http://www.nagraaudio.com/site/classic-amp/ Link to 6 Moons article http://www.6moons.com/audioreviews2/nagra2/1.html
From the manufacturer:
The Nagra CLASSIC AMP was designed for extremely high quality installations, which require high power while maintaining a perfect musical delivery of the Watts. The unit operates in pure class A over a very large power band and beyond in class AB. Each of the output stages is based on tandem MOSFET transistors of exceptional characteristics. Generally, assembly of an equivalent output stage requires several pairs of transistors, which is difficult to achieve precisely. The simplicity of the CLASSIC AMP’s design is the key to its musicality. The input and driver stages also contribute equally to the overall performance and precision.
The Nagra CLASSIC AMP is characterized by its stability, irrespective of the loads placed upon it. The power circuits drew particular care in the design stage. They are based upon an innovative concept: An over-dimensioned transformer and a diode bridge are placed upstream of the PFC decoupling stage, used to actively correct the power factor. The filtering is achieved with a bank of capacitors, totaling 300 000 µF. This supply concept, which ensures efficient energy transfer, allows immediate reaction on even the most abrupt transients.
The Nagra CLASSIC AMP is fitted with a traditional Nagra Modulometer on the front panel, showing the power of each output channel. An LED is also fitted to indicate saturations, excessive temperature and Mute. The amplifier is equipped with balanced and unbalanced inputs and in IN/OUT trigger function. It can be used in a bridged configuration, giving 1x 200 W into 8 Ω, and can also be used in a bi-amplification configuration if desired. Power and control 2x100 Watts of pure musicality
SPECIFICATIONS Power: 100 W RMS per channel into 8 Ω Sensitivity: 1 V or 2 V RMS Bandwidth: 10 Hz to 80 KHz, +0/-3 dB THD+N: < 0.05% Crosstalk: >70 dB Signal-to-noise ratio: Typically 110 dB, ASA “A” weighted Input impedance: >100 KΩ Automatic start: For input level >10 mV Protection, deactivates the amplifier: Overheating > +60° C (140° F); DC speaker protection above ± 2.5 VDC Consumption: 400 W max, less than 1 W in standby and Auto mode Weight: 18 Kg (39 lb 10 oz) Size: 277 x 395 x 174 mm (11 x 15½ x 7") Operating range: 90 - 110 V or 110 -132 V or 180 - 264 V a.c. 50 / 60 Hz.