Madrigal Audio 23.5, Manual, Page: 2 / 16

2
Voltage selection
The Nº23.5 is factory-set (internally) for 100V, 120V, 200V, 220V, or 240V
AC mains operation. Make sure that the label on the rear panel of the
amplifier indicates the correct AC operating voltage for your
location).
If the voltage indicated is incorrect, see your Mark Levinson dealer.
If you wish to change the AC operating voltage of your Nº23.5, see
your Mark Levinson dealer.
A Nº23.5 typically uses from 225W (at idle) to 1200W (at its rated power
into 8
Ω
). It may be powered by a 15-ampere AC mains line. For
optimum performance into lower-impedance loads, however, it's
recommended that the AC mains outlet used for the Nº23.5 be
capable of supplying a minimum of 20 amperes @ 100V and 120V AC,
and 10 amperes @ 200V, 220V, and 240V AC. If other devices are also
powered from the same AC circuit, their additional power
consumption must be considered.
Two slow-blow 250V 3AG fuses (15 ampere @100V and 120V AC and 8
ampere @200V, 220V, and 240V AC) are located on the rear panel of
the Nº23.5. Replace the fuses only with the same type.
ALWAYS remove the AC cord before removing the fuses.
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PUSH PUSH
AC mains fuses
AC connector Output (right) Output (left)
Nº23.5
DUAL MONAURAL AMPLIFIER
WARNING:
HAZARDOUS VOLTAGES AVAILABLE INSIDE: DISCONNECT AC~ MAINS CABLE
BEFORE REMOVING ANY COVERS. HIGH ENERGY AVAILABLE AT LOAD
TERMINALS. REFER TO OWNER'S MANUAL FOR PROPER TERMINATION
INSTRUCTIONS. DISCONNECT AMPLIFIER FROM AC~ MAINS BEFORE
REPLACING FUSES.
MAINS FUSES: PLEASE CONSULT OWNER'S MANUAL.
• 90 - 110 VAC~
• 105 - 125 VAC~
• 180 - 220 VAC~
• 210 - 240 VAC~
• 230 - 250 VAC~
• ~47-400 Hz
SERIAL NO.
INPUT
BALANCED INPUT
OUTPUT
RIGHT CHANNEL LEFT CHANNEL
+ – + –
OPERATING
VOLTAGE:
Voltage indication Shorting strap
Balanced
input (right)
Balanced
input (left)
Single-ended
input (left) Single-ended
input (right)
Shorting strap
D E S I G N E D A N D M A N U F A C T U R E D I N U . S . A . B Y
M A D R I G A L A U D I O L A B O R A T O R I E S , I N C .
®
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Figure 1: Rear panel
PRECAUTION