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HOME 음향장비ES
40 |
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The Stage Accompany ES 40 is a dual channel, high
efficiency power amplifier and comprises the following
components:
Balanced input stages. |
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Individual power supplies for both channels. |
Two high efficient amplifiers which deliver each
1000 Wrms into 8 Ω, 1470 Wrms into 4 Ω and 1810
Wrms into 2 Ω or 1240 W peak into 8 Ω, 2000 W
peak into 4 Ω, and
2850 W peak into 2 Ω |
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Advanced protection circuits. |
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The audio inputs and link outputs
are connected internally without electronics. This is done to prevent
any loss of sound quality. With an input impedance of 22 kΩ, it
is possible to connect a maximum of 30 ES 40s to a 600 Ω source
like the SA 1310 graphic equaliser. If more than 30 units need to
be connected to a single source, a separate signal driver must be
used.
The ES 40 is protected against the connection of speaker impedances
less than 2 Ω or even short circuiting of the output. In these cases
the output current is limited but the amplifier keeps working.
The ES 40 has a number of features, including:
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High efficiency class G operation. |
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Active Clip Eliminator (ACE) |
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Variable speed DC fan. |
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Dynamic Damping Control (DDC). |
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Front accessible Extended Function Network (EFN) |
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Soft start to reduce power on inrush current. |
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Temperature, DC, HF and short circuit protection. |
Class G operation
The power supply of the ES 40 amplifier produces 2 different supply
levels. Each channel actually consists of two power amplifiers.
One produces the output signal, the other one selects the power
supply voltage. This way, the ES 40 uses the low level supply at
low output power and the high level supply at high output power
which reduces internal dissipation significantly.
ACE
The Active Clip Eliminator circuit (ACE) in the ES 40 constantly
monitors both power amplifiers for continued clipping. When clipping
is detected the input level of the related channel is inaudibly
reduced to the safest maximum level. This feature prevents harmonics
damaging your sound quality and high frequency drivers and also
protects the amplifier from running hot
DC Fan
The built in DC fan has a continuous variable speed. Its control
circuit monitors the temperature of the output devices and the temperature
of the power supplies. The speed of the fan is calculated out of
this information. This system ensures that the fan always runs at
optimum speed and thus produces less noise.
DDC
Dynamic Damping Control (DDC) is a special way of measuring the
cone movement of a loudspeaker. The voltage induced in the voice
coil is sensed and fed back to the amplifier’s feedback circuit.
Hence, a virtually infinite damping is achieved, which results in
an exceptionally tight sound reproduction.
EFN
Through the Extended Function Network (EFN), with plug-in modules,
extra functions can be added to the amplifier, like cross-over,
high- low- or band-pass filtering, equalisation and loudspeaker
protection. Special protection boards are available for all Stage
Accompany loudspeaker systems.
Soft Start
The soft start circuit is active when the ES 40 is turned on. The
mains inrush current, which normally is in excess of 100 A is limited
to a safe value. Also the second power supply is turned on with
a two second delay after the first power supply. However, take care
not to switch on too many amplifiers at the same time, or you risk
that the main fuses of your distribution may trip.
Temperature, DC, HF and Short Circuit
Protection
The amplifier and the loudspeaker outputs are protected against
all possible damages. |
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| Input
Sensitivity |
1.72 Vrms (+7 dBu)
(full continuous power into 4 Ω) |
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| Maximum Input
Level |
+22 dBu |
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| Input Impedance |
22 kO each leg |
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| Common Mode Rejection
Ratio (CMRR) |
> 70 dB @ 20 Hz - 20 kHz
> 90 dB @ 1 kHz |
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| Frequency Range |
10 Hz - 20 kHz, -0.4 dB @ 100 W into 8 Ω
10 Hz - 55 kHz, -3 dB @ 100 W into 8 Ω |
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| Gain |
33 dB (44.7x) |
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| Channel Separation |
90 dB @ 1 kHz, 100 W into 8 Ω
75 dB @ 20 kHz, 100 W into 8 Ω |
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| Total Harmonic
Distortion (THD) |
< 0.3 % @ 20 Hz - 20 kHz, more than 2 Ω load at all powers,
1 dB below clipping.
< 0.007 % @ 1 kHz, 100 W into 8 Ω
< 0.05 % @ 20 kHz, 100 W into 8 Ω |
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| Intermodulation
Distortion (IMD) |
< 0.06 % @ 200 Hz - 20 kHz,
F1 = 70 Hz, 4:1, 100 W into 8 Ω |
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| Signal to Noise
Ratio |
> 110 dB A-weighted |
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| Slew Rate |
> 40 V/μs @ 8 Ω |
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| Damping (with
DDC) |
10.000 @ 1 kHz, 10 V across 8 Ω |
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| Continuous Power
Delivered |
2 x 1000 W into 8 Ω
2 x 1470 W into 4 Ω
2 x 1810 W into 2 Ω |
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| Peak Power Delivered |
2 x 1240 W into 8 Ω
2 x 2000 W into 4 Ω
2 x 2850 W into 2 Ω |
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| Continuous Bridged
Power Delivered |
1 x 2000 W into 16 Ω
1 x 2940 W into 8 Ω
1 x 3620 W into 4 Ω |
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| Peak Bridged
Power Delivered |
1 x 2480 W into 16 Ω
1 x 4000 W into 8 Ω
1 x 5700 W into 4 Ω |
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| Mains Supply
Voltage |
internally switchable 110-120/220-240 VAC |
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| Power consumption
typical Idle |
100 VA |
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| 1/8 Power, pink
noise @ 2 O |
2800 VA |
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| Weight |
34.8 kg / 77 lb |
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| Housing |
19 in rack mount,
3 HU high, 440 mm (17.3 in) deep behind the mounting surface
(without connectors) |
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| Dimensions (h
x w x d) |
133 x 482 x 445 mm (without connectors and rack handles)
(5.25 x 19.0 x 17.5 in) |
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