Jeff Rowland Design Group 312 owner manual I n t e n a n c e & C l e a n i n g

M a i n t e n a n c e & C l e a n i n g

OWNER’S MANUAL MODEL 312 STEREO AMPLIFIER

All JRDG products are designed to provide a lifetime of enjoyment and listening pleasure. The Model 312 Stereo Amplifier is uniquely constructed from precision-machined 6061-T6 aluminum sub-assem- blies, configured and dimensioned to maximize chassis strength and reduce vibration. Constrained mode damping materials have also been applied in several areas to further reduce chassis resonance. The chassis is sealed to prevent dust from entering the interior and should never need interior cleaning during the lifetime of the product.

All internal circuitry is maintenance-free such that no adjustments of any kind are necessary over the lifetime of the product. If the amplifier is ever in need of service, updating, or upgrading, it should only be returned to an authorized repair facility or technician for servicing.

The front panel of the unit is precision-machined in a unique process that incorporates a diamond tipped cutting tool. This process was refined over many years to produce an attractive and unique appearance. Because the surface is not finished in the typical fashion of most audio and video equipment, there are a few rules that must be kept in mind when cleaning the equipment.

•Please allow the front panel, which is coated with an automotive-grade polyure- thane finish, to cure for 6 months before attempting to clean it. This will prevent small scratches from marring the surface before the surface coating has had a chance to harden completely.

•The front panel of the unit should never be cleaned with anything other than a very soft cotton cloth and plain water or fine oil-based furniture polish. Because of the fine finish of the front panel, use of any other cleaning agent may permanently scratch the finish.

•The top cover, sides and bottom are protected by a durable black anodized finish and can be cleaned with a soft cotton cloth (such as an optical lens cleaning cloth or fine furniture polishing rag) dampened with plain water. Water should be applied directly to the cloth and not the chassis. A very mild plastic or glass cleaner that does not contain ammonia may also be used. If a mark has been left on the chassis, do not use any type of abrasive or chemical cleaner to remove the mark.

6 PO BOX 7231, COLORADO SPRINGS, COLORADO 80933 USA E- mail: jrdg@jeffrowland.com WWW. JEFFROWLAND.COM TELEPHONE (719) 473 -1181