Features, Few Precautions, Placement, Rack Mounting

Features

•Two-channel power ampliﬁer, with 50 watts per channel output into 8 ohms.

•Rack-mountable (standard international 2U rack height). Rack handles or the rack mount kit can be removed for installation in narrower spaces.

•Front panel input level controls. Can be conﬁgured three ways: recessed adjust- ments, knobs for user control, or covered with blanking plugs to prevent user adjust- ment.

•User-selectable power on/off conﬁgura- tion: manual, automatic signal sensing, or controlled by remote 12 volt trigger signal.

•Provision for installation of optional cool- ing fan for increased heat dissipation and performance.

•Protection circuitry against fault conditions with front panel indicators

A Few Precautions

Please read this manual carefully. In addi- tion to basic installation and operating in- structions, it provides valuable information on various RKB-250 system conﬁgurations as well as general information that will help you get optimum performance from your system. Please contact your authorized Rotel dealer for answers to any questions you might have. In addition, all of us at Rotel welcome your questions and comments.

Save the RKB-250 shipping carton and all en- closed packing material for future use. Ship- ping or moving the RKB-250 in anything other than the original packing material may result in severe damage to your ampliﬁer.

Keep the original sales receipt. It is your best record of the date of purchase, which you will need in the event warranty service is ever required.

Placement

The amplifier can be mounted in a stan- dard equipment rack or placed on a solid surface.

When not using an equipment rack, place the RKB-250 on a solid, level surface away from sunlight, heat, moisture, or vibration.

Don’t stack other components or objects on top of the RKB-250. Don’t let any liquid fall into the unit.

Likewise, remember the weight of the ampli- ﬁer when you select an installation location. Make sure that the shelf or cabinet can sup- port its considerable bulk.

The RKB-250 generates heat during normal operation. Do not block ventilation open- ings. Allow a minimum of 10 cm or 4 inches of unobstructed space around the unit. If installed in a cabinet, make sure that there is adequate ventilation.

Rack Mounting

The RKB-250 is supplied with two rack mount- ing brackets for installation in standard equip- ment racks. To install these brackets:

1.Hold a bracket against the side of the am- pliﬁer to locate the chassis cover screw that must be removed for clearance. Re- move this screw with a Phillips head screw driver and replace it with one of the short Philips head machine screws enclosed with the brackets.

2.Install the rack mount bracket, inserting three of the long Philips head machine screws through the bracket and into the threaded holes in the side of the ampliﬁer.

3.Repeat for the bracket on the other side of the ampliﬁer.

English

NOTE: You can remove the feet from the bot- tom of the ampliﬁer if necessary for clearance in the rack. Save the feet and hardware for future use.

After the adaptors are installed, use four bolts supplied with your equipment rack to mount the ampliﬁer. Be sure that all four bolts are tightened properly.

Rack Handles

The rack mount brackets are supplied with handles which can be installed or removed. The handles are installed with two of the long Philips head machine screws inserted through the rack mount bracket and into the threaded holes in the handle. If you do re- move the handles, use the rubber hole plugs supplied with the bracket hardware to ﬁll the exposed holes

Optional Fan Kit

The RKB-250’s generous heatsinks provide ad- equate cooling for most installations. However, when rack mounting or otherwise installing the ampliﬁer in a conﬁned space near other heat-generating components, additional cool- ing may be desirable. The optional RKBF-1 fan kit can be easily installed for additional forced air cooling. In addition to lowering operating temperatures, the optional fan kit improves the performance of the ampliﬁer, especially when driving difﬁcult loudspeaker loads. See your Rotel dealer for information on the optional fan kit.

NOTE: The optional cooling kit generates me- chanical fan noise during operation. When using the fan cooling, select a location for the ampliﬁer where the noise will not be intrusive.