Bel Canto Design SET 80 Single Ended Balanced 845 Triode Monobloc Power Amplifier User's Guide and Operating Information Bel Canto Design • © August 2000
SET 80 Single Ended Balanced 845 Triode Monobloc Power Amplifier The Bel Canto Design SET 80 uses a unique and elegant of circuit architecture with the highest quality of parts and construction to produce an audio amplifier which is unparalleled in recreating the musical event.
Bel Canto grew from the quest to achieve the ultimate musical satisfaction from an audio system. This goal began with the discovery of the inherent sonic qualities and musical performance potential of a nearly forgotten technology, the single-ended triode amplifier.
Unpacking Carefully unpack each piece and check for shipping damage. If there is any damage, please contact your dealer or Bel Canto Design, Ltd. Save all packing materials as the packing is specially designed to protect the amplifier during shipping or transporting. If you lose or damage the packing materials or carton, please contact your dealer or distributor before attempting to transport the amplifiers.
Initial Setup and Assembly ! Warning 1. Never remove the bottom panel of the amplifier. There are no fuses or user serviceable components in the amplifier, and dangerous voltages could be present if the bottom cover is removed. Removal of this cover or any tampering with the amplifier will immediately void the warranty. 2. Never plug the amplifier into the power source without all tubes in place and the protective tube covers attached to the top plate of the chassis. 3.
Initial Setup and Assembly certain that the tube is down far enough. The metal tube base should protrude less than 1/4" from the top of the tube socket when the pin is at the bottom of the slot in the socket. When you are certain that the tube is in place, then rotate the tube approximately 1/8 turn in the clockwise direction. The tube should be nearly vertical or leaning slightly. NOTE: Be certain that the bayonet pin is at the bottom of the slot before applying rotational force on the tube.
Connecting and Use Connecting the SET 80 into Your System Input Connections There is one RCA input jack and one XLR balanced connector for the analog inputs. Both inputs have the same signal path and performance and may be used with any high quality cable set Tube Life and Replacement The 845 output tubes are designed for commercial use in and will provide at least 8000 hours of life as used in the Orfeo circuit. This translates to over 5 years of typical use.
Amplifier Power and Loudspeaker Selection Amplifier Placement and Poweron The SET 80 has a nominal power rating of over 70 watts for each channel. While this may seem like a low power output compared to many amplifiers on the market, because of the class A operation, the low distortion, wide power bandwidth, and the grace that these amplifiers have when overdriven, they will produce as much or more level sound than many 100-200 watt amplifiers.
Technical Description Circuit Description and Technical Information The philosophy behind the design of the SET 80 is based on the observation that simplicity of the circuit and the reduction of the number of active devices in an audio amplifier will permit the greatest quantity of information to get through the amplifier. This allows the illusion of music to be most powerful and results in the amplifier 'disappearing' effectively from the playback chain.
Specifications Continuous power output into 4 or 8 ohms • 70 watts Peak power output • 140 watts Bandwidth • -3 dB 6 Hz - 35 kHz Class of operation • Class A single-ended balanced 845 triode Input level for 70 watts output • 2 Vrms Signal to Noise Ratio re 1 watt out • 100 dB A weighted Distortion at 1 watt / 1 kHz • <0.
Warranty Information Please take a moment to fill out your warranty registration card. Returning this registration validates your warranty and allows us to send you information on product updates and new product development. Completion of this card is requested within 15 days of purchase to ensure immediate warranty coverage. Bel Canto Design offers a 3 year limited warranty on internal parts and workmanship (this does not include tubes) that will replace any defective parts directly.
