Related Manuals for Mark Levinson 27.5
Summary of Contents for Mark Levinson 27.5
- Page 1 Operating Manual ® Mark Levinson Nº27.5 Dual Monaural Power Amplifier Madrigal Audio Laboratories, Inc.
-
Page 3: Important Safety Instructions
10. NEVER replace any fuse with a value or type other than those specified. 11. NEVER attempt to repair this product. If a problem occurs, contact your Mark Levinson dealer. 12. NEVER expose this product to extremely high or low temperatures. - Page 4 From all of us at Madrigal Audio Laboratories, thank you for choosing the Mark Levinson ® Nº27.5 Dual Monaural Power Amplifier. A great deal of effort went into the design and construction of this precision instrument. Used properly, it will give you many years of enjoyment.
-
Page 5: Table Of Contents
Figure 12: Single-ended bridging cable ........11 Care and maintenance ................12 Cleaning ....................12 Fuses ...................... 12 Specifications .................... 13 Dimensions ....................14 Figure 13A: Dimensions, Nº27.5, top view ........14 Figure 13B: Dimensions, Nº27.5, side view ........14... -
Page 7: Unpacking And Placement
Otherwise, the Nº27.5 may induce hum in these sensitive components. Ventilation You may place the Nº27.5 in a cabinet or on a shelf, but you must provide adequate ventilation to prevent overheating. Make sure to maintain the clearance provided by the Nº27.5's feet, and maintain adequate clearance above the unit (for unrestricted air flow through the heatsinks and through the vents in the bottom of the chassis). -
Page 8: Voltage Selection
Output (left) If the voltage indicated is incorrect, see your Mark Levinson dealer. If you wish to change the AC operating voltage of your Nº27.5, see your Mark Levinson dealer. A Nº27.5 may be powered by a 15-ampere AC mains line. Lack of... -
Page 9: Signal Connections
Nº27.5. Connect your preamplifier's right-channel main output to the right-channel RCA-type input on the rear panel of the Nº27.5. Be sure that the shorting strap is inserted into both of the Nº27.5's XLR-type connectors, between Pins 1 and 3. -
Page 10: Operation
180° out of phase with the input signal. For inverting operation, you will connect your preamplifier's main output cables to the XLR-type inputs on the rear panel of the Nº27.5. The pin assignments of these connectors are Figure 3: Female input... -
Page 11: Balanced Normal (Non-Inverting) Operation
If your preamplifier is equipped with a balanced main output, and (non-inverting) operation particularly if long cable lengths are required between your preamplifier and the Nº27.5, it's best to wire the Nº27.5 for balanced operation. Refer to your preamplifier's operating manual to verify that the pin assignments of its outs correspond to Figure 3. -
Page 12: Speaker Connections
Mark Levinson dealer. Lug connection There are two recommended methods for connecting speaker cables to the Nº27.5. A high-quality spade lug or hook lug, soldered to the cable, is best. Figure 6: Spade and hook lugs... -
Page 13: Connecting The Speakers
Connecting the speakers After completing the speaker cables, connect the left-channel + (positive or red) output post of the Nº27.5 to the + (positive or red) input terminal of the appropriate loudspeaker. Connect the left-channel – (negative or black) output post of the Nº27.5 to the –... -
Page 14: Power Connection
Connecting the Connect the AC power cord (included in the accessory pack) to the AC power cord AC connector on the rear panel of the Nº27.5, then to the AC mains outlet. To Nº27.5 To AC mains... -
Page 15: Bridged Operation
Bridged operation When greater power output is desired, the Nº27.5 may be bridged for monophonic operation into load impedances of at least 2Ω. Note: Make sure the loudspeaker is rated to handle extremely high power levels. For example, a bridged Nº27.5 driving an 8Ω... -
Page 16: Single-Ended Bridged Operation
Nº27.5 to the + (positive or red) input terminal of the appropriate loudspeaker. Connect the right-channel + (positive or red) output post of the Nº27.5 to the – (negative or black) input terminal of the same loudspeaker. 4. Repeat this procedure for the other Nº27.5 to be bridged. -
Page 17: Figure 12: Single-Ended Bridging Cable
Nº27.5 to the + (positive or red) input terminal of the appropriate loudspeaker. Connect the right-channel + (positive or red) output post of the Nº27.5 to the – (negative or black) input terminal of the same loudspeaker. Note: Connect both speakers in the same way; otherwise, the speakers will be out of phase with each other. -
Page 18: Care And Maintenance
Care and maintenance To remove dust from the cabinet of the Nº27.5, use a feather duster. To Cleaning remove dirt and fingerprints, use isopropyl alcohol applied to a soft cloth. Poor connections cause sonic degradation. We recommend, therefore, that you clean all speaker connection with denatured alcohol at least once a year. -
Page 19: Specifications
Telephone: (203) 346-0896 FAX: (203) 346-1540 If purchased in North America, this Mark Levinson product’s warranty is owner-transferable. Warranty conditions are valid only in the country where the product was originally purchased. For warranty information and conditions on products purchased outside of North America,... -
Page 20: Dimensions
Dimensions Figure 13A: Dimensions, Nº27.5, top view 2-1/2" 5/8" (63.5) (15.9) 1-3/4" (44.5) 1-3/4" TYP. 1/2" TYP. (44.5) (12.7) 18-7/8" (479.4) 12" (304.9) 4-3/4" 1-1/4" 19" (120.7) (31.8) (482.6) 1-3/32" (27.5) 15/16" 2-1/2" (23.8) (63.5) 3/8" 1-1/2" (9.5) (38.1) 14-3/16"... - Page 21 Madrigal Audio Laboratories, Inc. 2081 South Main Street, P.O. Box 781 Middletown, Connecticut 06457 USA Telephone: (203) 346-0896 or 344-9300 FAX: (203) 346-1540 ® is a registered trademark of Madrigal Audio Laboratories, Inc. ©1993 Madrigal Audio Laboratories, Inc. All rights reserved. 630074-1 Printed in U.S.A.
Need help?
Do you have a question about the 27.5 and is the answer not in the manual?
Questions and answers