Cary Audio Design CAD 300 owner manual Service and Care, Tube Replacement, Factory Service

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SERVICE AND CARE ________________________________________________

The chassis may be cleaned with a soft towel and Windex® or a similar window cleaner. Spray it on the cleaning cloth to moisten it, not on the component. Do not use solvents or harsh chemicals to clean the preamplifier. They may remove the labels from the chassis. The frequency and need of cleaning will be governed by operating environmental conditions. Avoid letting the component become dusty or wet. A ‘feather duster’ type cleaner will also work well for cleaning the component.

Tube Replacement

If it becomes necessary to replace the tubes in the CAD 300 SEI amplifier, a matched set of output tubes of the same brand should be used. A new tube kit is available from Cary Audio Design. You should get a few years or more from the output tubes with everyday usage and many, many years of use from the 6SN7 input tube and 6SN7 driver tubes.

Factory Service

Careful consideration has been given to the design of this product to keep maintenance problems to a minimum. If the problem is not easily solved, we suggest that you contact our Customer Service Department by phone at (919) 355-0010, 1–5 pm Eastern Standard Time, to describe your problem in detail. DO NOT return the component to the factory without a Return Authorization Number (RA) from the Customer Service Department.

Cary Audio Design assumes no responsibility if the transportation company refuses to pay a damage claim due to your improper packing or lack of insurance should the unit be lost in shipment. We strongly suggest using the original packing cartons for shipping any Cary Audio Design component.

Non-Warranty Repairs

Cary Audio Design will provide repair service for its products charging on a time and expense basis. At this time, the standard non warranty service bench fee is $125 with all parts used for repair charged extra. This may change with time and is not a quote for service. Please call us at 919-355-0010 for more information about out of warranty service and repair fees.

WARNINGS

MAKE NO ATTEMPT TO PUT THE CAD 300 SEI IN SERVICE WITH THE BOTTOM PLATE REMOVED. CONTACT WITH HIGH VOLTAGES FOUND IN THE UNIT CAN BE FATAL. COMPLETELY REMOVE AC POWER PLUG FROM THE WALL AND ALLOW 30 MINUTES FOR THE HIGH VOLTAGE CAPACITORS TO DISCHARGE THROUGH BLEEDER RESISTORS BEFORE ATTEMPTING TO CHANGE TUBES OR CLEAN THE INSIDE OF THE AMPLIFIER.

CAUTIONS

NEVER REMOVE / INSERT AC PLUG WHEN THE UNIT IS ON OR THE AC POWER SWITCH IS IN THE ON POSITION. OBSTRUCTION OF THE TOP PORTION OF THE CAD 300 SEI WILL RESULT IN TUBES OVERHEATING.

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Contents CAD 300 SEI Table of Contents Introduction Additional Design ThoughtsSpecifications Power OutputCircuit Type InputsAdditional Features Output TransformersTube Compliment Features Front PanelRear Apron Output SelectorInstallation AC On Power Switch Bias Adjustment ProceduresOperation Break-In PeriodPage Page Tube Placement Chart Service and Care Tube ReplacementFactory Service Non-Warranty RepairsUnited States Limited Warranty Cary Audio Design

CAD 300 specifications

Cary Audio Design's CAD 300 is an epitome of high-fidelity audio engineering, skillfully blending classic aesthetics with cutting-edge technology. Renowned for its exceptional sound quality and craftsmanship, this amplifier has garnered acclaim among audiophiles and music lovers alike.

At the heart of the CAD 300 lies its tube amplification technology, which utilizes three 300B power tubes in a push-pull configuration. This design not only enhances power output but also ensures a rich, warm sound signature that tube amplifiers are celebrated for. The CAD 300 delivers a power output of around 15 watts per channel, allowing it to drive a diverse range of loudspeakers effectively, particularly those with high sensitivity.

One of the standout features of the CAD 300 is its fully balanced design, which minimizes noise and maximizes signal integrity. This configuration enhances the amplifier's performance by reducing crosstalk and improving the overall soundstage, providing listeners with a more immersive audio experience. The inclusion of high-quality capacitors and custom-wound transformers further elevates the amplifier's performance, allowing for precise audio reproduction across the frequency spectrum.

The CAD 300 also showcases Cary Audio's commitment to thermal management and longevity. It includes a robust chassis designed to dissipate heat effectively, ensuring that the tubes operate within optimal temperatures, thus prolonging the lifespan of the components. The amplifier's vintage-inspired design features a beautiful brushed aluminum faceplate and illuminated VU meters, which not only provide functional feedback but also add a touch of elegance to any audio setup.

User-friendly features such as the integrated volume control and speaker binding posts ensure ease of use, while the availability of multiple input options caters to diverse setups and needs. The CAD 300 also supports bi-wiring, allowing advanced users to fine-tune their audio experience further.

In summary, the Cary Audio Design CAD 300 is a remarkable amplification solution that combines traditional tube technology with modern engineering marvels. Its warm sound signature, high-quality construction, and thoughtful design make it an outstanding choice for anyone seeking to elevate their audio experience. Whether used in a dedicated listening room or as part of a high-end home theater system, the CAD 300 promises to deliver dynamic and engaging sound that resonates with discerning listeners.
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