AUSTRALIAN MONITOR OPAL User manual

fu Australian Monitor
Opal S eries
POWERAMPLIFIERS
Australian opals are among the most beautiful and
sought-after iridescent gems in the world. Of all the
known precious stones, only opal can show the complete
range of spectral hues in a glorious balance.
The Australian Monitor Opal Series is a gem among
amplifiers, the culmination of countless hours of
dedicated research and development.
Without sacrificing Australian Monitor's legendary
quality or design, the new affordable Opal Series
response combined with a high slew rate, and high
damping factor for accurate loudspeaker driver control.
Construction
Built to the highest standards the Opal Series
utilises a 2 unit high, module monocoque chassis.
Its symmetrical construction features heavy gauge
aluminium front and rear panels integrated with a
rigid folded steel pan and steel side bracing.
brings within everyone's reach superlative sonic
performance, unmatched dynamics and of course our
renowned "all terrain" construction techniques.
Audio Reproduction
The Australian Monitor design team have drawn on
a wealth of experience in sophisticated audio circuit
designs for CD mastering facilities, music recording
studios and other esoteric audio monitoring
situations. ln the new Opal Series they have created
one of the finest high definition audio signal paths
available, exhibiting dazzling transients, timbral
accuracy and outstanding sonic integrity.
The MOSFET-based circuit design with double-
balanced current-mirror drive circuit provides wide
bandwith, ultra low THD / lMD, super fast transient
Cooling
Fourcustom aluminium alloy heatsinks, providing a6.0
metre perimeter with over 500,000 square mm of
convection cooling area. lnternal airflow is assisted by
a signal-dependent, silent axial fan, providing "on
demand" cooling.
Power Supply
At the heart of the Opal 2802 is a high efficiency 800VA
toroidial mains transformer, the current source for two
massive 15,000 microfarad computer grade reservoir
capacitors. While maintaining high power output, this
topology minimises ELF emissions to ensure your
safety.

Opal 1202
Output Power
Test
E.l.A. lkHz, <0.05% THD
(pre-stress at rated power for 5 min)
single channel driven
double channel driven
Bridge mode
Dlstortlon
@ 0.5 dB below clipping re 4 ohms
THD @ 1 kHz
IMD SMPTE (60 Hz / 7 kHz 4:11
IMD CCIF (14 kHz / 15 kHz 1:1)
Frequency Response
-0.35, -0.15d8
Damping Factor
@ 1 kHz, 8 ohm load
lnput lmpedance
Line to Line, Balanced
lnput Sensitlvity
I ohms, rated power
lnput CMRR
@1kHz
Voltage Galn
@lkHz
Output Rlee Tlme
2O RHz square wave 1 13Vpp (leading edge)
Slew Rate
20 kHz square wave 145Vpp (leading edge)
SlgnaUNolse Ratlo
linear (30 kHz)
A weighted
Crosstalk
@1kHz
Welght
Net
Packed
Dlmenrlone
excluding handles
(19 inch EIA rack mounting, 2 units high)
Opal 2802
Power Power
Eohm 4ohm
150W 220W
130W 175W
340W
<0.005%
<0.005%
<0.008o/"
20 Hz - 20.kHz
250:1
25 kohm
(+adB) 1.23Vrms
>81.5db
31dB
102d8
104d8
<-90d8
13 kg
15 kg
HxWxD
3.5 x 19 x 14.8 inch
88 x 482 x 375 mm
Output Power
Test
E.l.A. 1kHz, <0.05% THD
(pre-stress at rated power for 5 min)
single channeldriven
double channel driven
Bridge mode
Dlstortlon
@ 0.5 dB below clipping re 4 ohms
THD @ 1 kHz
f MD SMPTE (60 Hz /7 kHz 4:1)
IMD CCIF (14 kHz / 15 kHz 1:1)
Frequency Response
-0.35, -0.15d8
Damplng Factor
@ 1kHz,8 ohm load
lnput lmpedance
Line to Line, Balanced
lnput Sensitlvity
I ohms, rated power
lnput CMRR
@1kHz
Voltage Gain
@1kHz
Output Rlee Tlme
2.4pS 20 kHz square wave 113Vpp (leading edge)
Slew Rate
35V/pS 20 kHz square wave 145Vpp (leading edge)
SlgnaUNoise Ratlo
linear (30 kHz)
A weighted
Crogatalk
@1kHz
Welght
Net
Packed
Dlmenalone
excluding handles
(19 inch EIA rack mounling, 2 units hlgh)
Power Power
Sohm 4ohm
250W 320W
200w 280w
560W
<0.005o/o
<0.005%
<0.008o/o
2O Hz - 2OkHz
250:1
25 kohm
(+adB) 1.23Vrms
>81.sdb
32dB
2.apS
35V/pS
102d8
104d8
<-90d8
15 kg
17 kg
HxWxD
3.5 x 19 x 14.8 inch
88 x 482 x 375 mm
**w@ ffiErc *rll.ats
ttaVlr
a L.a t-t
Features
- Butfered 21 position front-panel stepped attenuators
- Balanced XLR inputs
- Symmetrical construction for even weight distribution
- 1 Watt / Clipping status indicators
- Binding post outputs
- Silent convection cooling with fan assist under heavy
load
Options
1.70 I 100 Volt line transformer
2. HP-1 i LP-1 Filter cards
3. Speakon output connectors
j
Protection
- lnput overvoltage protection
- Fault protection and indication
- lntemal fuses on each supply rail
- Overload protection and indication
- Short circuit protection and indication
- lndependent thermal sensing on each channel with
safety mute
AUSTRALIAN MONITOR PTY LTD
29 HOPE STREET ERMINGTON, N.S.W.2115
SYDNEY AUSTRALIA
Phone [phone]
Fax [phone]
Email ausmon@mypostbox.@m