Bel Canto Design SET 40 Single Ended 845 Triode Stereo Power Amplifier User's Guide and Operating Information Bel Canto Design • © August 2000
SET 40 Single Ended 845 Triode Stereo Power Amplifier The Bel Canto Design SET 40 uses the most simple and elegant of circuit architectures 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 SET40 into Your System Input Connections There is one pair of RCA input jacks for the analog inputs. The right channel is marked with a Red band and the left with a Black band. The 845 output tubes are designed for commercial use in and will provide at least 8000 hours of life as used in the SET circuit. This translates to over 5 years of typical use. The input tubes generally have 2000 hour life and will need replacement every 1 1/2 to 2 years.
Amplifier Power and Loudspeaker Selection The SET 40 has a nominal power rating of 37 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 watt amplifiers.
Technical Description Circuit Description and Technical Information The philosophy behind the design of the SET 40 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 • 37 watts Peak power output • >70 watts Bandwidth • -3 dB 6 Hz - 35 kHz Class of operation • Class A single-ended 845 triode Input level for 37 watts output • 1.5 V rms Signal to Noise Ratio re 1 watt out • 96 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.
