Mark Levinson 27.5 User Manual

21
Table of contents
Unpacking and placement .......................................................................1
Unpacking .............................................................................................. 1
Placement ............................................................................................. 1
Ventilation .............................................................................................. 1
Custom installations .............................................................................. 1
Voltage selection ........................................................................................2
Figure 1: Rear panel ....................................................................... 2
Signal connections ..................................................................................... 3
Connectors ............................................................................................ 3
Cables .................................................................................................... 3
Connection methods and operating modes .................................... 3
Single-ended normal (non-inverting) operation ............................... 3
Figure 2: Connections for single-ended normal (non-inverting)
operation .................................................................................. 3
Single-ended inverting operation ...................................................... 4
Figure 3: Female input connector ................................................ 4
Figure 4: Connections for single-ended inverting operation ..... 4
Balanced normal (non-inverting) operation...................................... 5
Figure 5: Connections for balanced normal (non-inverting)
operation .................................................................................. 5
Speaker connections .................................................................................6
Lug connection ..................................................................................... 6
Figure 6: Spade and hook lugs ..................................................... 6
Pigtail connection ................................................................................. 6
Figure 7A: Pigtail connection ........................................................ 6
Figure 7B: Pigtail connection ......................................................... 7
Figure 7C: Pigtail connection ........................................................ 7
Connecting the speakers ..................................................................... 7
Power connection .......................................................................................8
Connecting the AC power cord ......................................................... 8
Figure 8: AC power cord polarity ................................................. 8
Performance tips ................................................................................... 8
Protection circuitry ................................................................................ 8
Bridged operation .......................................................................................9
Balanced bridged operation .............................................................. 9
Figure 9: Connections for balanced bridged operation ........... 9
Figure 10: Balanced bridging cable ........................................... 10
Single-ended bridged operation ...................................................... 10
Figure 11: Connections for single-ended bridged operation.. 10
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

Mark Levinson 27.5 Specifications

General

Voltage Gain	26 dB
Frequency Response	20Hz - 20kHz
Total Harmonic Distortion	<0.1% at rated power
Input Sensitivity	1.5V
Signal to Noise Ratio	>80dB
Type	Solid-state
Power Output	100 watts per channel into 8Ω (stereo)