Mark Levinson 27.5 User Manual

8
Power connection
After making your loudspeaker connections, apply power to your
preamplifier and allow it to stabilize. (Mark Levinson preamplifiers, for
example, require about one minute to stabilize.)
Connect the AC power cord (included in the accessory pack) to the
AC connector on the rear panel of the Nº27.5, then to the AC mains
outlet.
Connecting the
AC power cord
To Nº27.5 To AC mains
1
3
2
1
2
3
1 = Line (hot)
2 = Neutral
3 = Earth ground
Figure 8: AC power cord
polarity
Turn on the Nº27.5 by setting the power switch on the front panel to
the "|" (on) position.
Note: You may hear a transient "click" or "pop" through your
speakers a few seconds after you operate the Nº27.5's power switch.
This noise is normal and won't damage your speakers.
The Nº27.5 won't achieve its sonic potential right away — its sonic
performance is close to the optimum after about 100 hours of use. For
the best performance, you may leave your Nº27.5 powered at all
times, except when you won't be using it for a long period (see
"Important Safety Instructions").
The Nº27.5 is designed to be "power-cycled" (that is, turned on and
off) without affecting its longevity. After the amplifier is turned on after
being left unpowered, allow for about one hour of warmup before
expecting optimal sonic performance.
Under certain conditions (an electrical malfunction or inadequate
ventilation), the Nº27.5's protection circuitry may activate, turning off
the amplifier before damage results. When this happens, the power
switch on the front panel will be set automatically to the "O" (off)
position. After a brief cooling period, you can reactivate the amplifier
by setting the power switch to the "|" (on) position.
If this occurs regularly during normal use, see your Mark Levinson
dealer immediately.
Note: While the protection circuitry is active, the power switch won't
stay in the "|" (on) position. If, after the amplifier has cooled, the
power switch still won't engage, the protection circuitry still detects
a malfunction; see your Mark Levinson dealer immediately.
Performance tips
Protection circuitry

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)