Jeff Rowland Design Group 312 owner manual G n a l & p ow e r C o n n e c t i o n s

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s i g n a l & p ow e r C o n n e c t i o n s

OWNER’S MANUAL MODEL 312 STEREO AMPLIFIER

(D & E) LOUDSPEAKER OUTPUT: Unscrew the knob that secures the speaker output connectors on both the LEFT SPEAKER OUTPUT

(E)and the RIGHT SPEAKER OUTPUT (D) and pull the securing block out far enough to allow access to the binding posts. Install the positive (usually red) loudspeaker cable spade terminal to the positive (+) binding post and the negative spade terminal to the negative (–) binding post on both the LEFT and RIGHT CHANNEL. Secure the loudspeaker connections by tightening the knob securely with your fingers.

The Model 312 will only accept spade terminations for loudspeaker cables. Banana plugs or bare wire connections can be used but require an optional clamp available from your JRDG Dealer.

The Model 312 has two pairs of binding posts per channel to facilitate bi-wiring. Both sets of binding posts are active and connected in parallel with no difference in signal quality. If your loudspeakers are capable of bi-wiring and you wish to do so, remove the jumpers connecting the two sets of binding posts together on your loudspeakers. Connect one pair of binding posts from each channel to the high frequency terminals of your loudspeakers and one pair from each channel to the low frequency terminals of your loudspeakers.

WARNING: Both positive and negative outputs are electrically active with respect to chassis and/or system ground potential. Therefore, this amplifier cannot be used

in certain loudspeaker switching configurations, such as those used in retail demonstrations. Failure to avoid these precautions may short the outputs to ground and can result in damage to the amplifier and will void the warranty. Certain subwoofer speakers which derive signals from amplifier outputs will require additional circuitry to properly isolate the amplifier output. Please contact JRDG before connecting these types of subwoofers.

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

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Contents Page TA B L E O F C O N T E N T S T R O D U C T I O N O D U C T F E AT U R E S XLR input connectors for balanced system configurationPAC K AG E C O N T E N T S Pac k i n g I T I a L I N S P E C T I O NI n t e n a n c e & C l e a n i n g Protection Systems Risk of Electrical Shock S ta l l at i o n , U s e & c a r eJeff Rowland Design Group 2007. All Rights Reserved G n a l & p ow e r c o n n e c t i o n s Jeff Rowland Design Group 2007. All Rights Reserved G n a l & p ow e r C o n n e c t i o n s Constant 3v To 15v DC Signal 12VDC Typical tip Ground sleeve E C I F I C AT I O N S M E N S I O N S T i o n a l a d j u s t m e n t s Overall gain adjustment
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