DSA_8405_EDS_en
Engineering Data Sheet
DSA 8405
▪ 4 x 500 W
▪ Class D
▪ Optimized for permanent installation
▪ EN 54-16: 2008
▪ Optional Remote Control Module (RCM-810)
The multi-channel power amps DSA 8405/8410/8805
are members of the DYNACORD DSA Series, which
mark a milestone in the design and production of highperformance power amps. The unique combination of
Class D power amp blocks and synchronized switching
power supply offers power density which, to this day,
is unrivalled and, at the same time, provides excellent
audio performance. The possibility to individually
switch the operation mode of each power amplifier
channel makes DSA multi-channel power amps
particularly flexible in use. By default, low-impedance
mode (LZ ≥ 2 Ω) is set for all channels. If needed, each
channel can be separately switched to high-impedance
operation (HZ) to directly drive 70 V or 100 V speaker
lines without the need for additional output
transformers (Direct Drive).
Through VLD (Variable Load Drive) in combination
with a RCM-810 remote control module, it is possible
to define freely which output power should be made
available in the channel in question: e.g. Channel 1 =
350 W into 2.6 Ω; Channel 2 = 500 W into 8 Ω etc.
The omission of output transformers together with the
highly efficient Class D power amp blocks and a
switching power supply makes an exceptionally
attractive, environment and resource friendly
amplifier. DSA multi-channel power amps are ideal for
driving any professional fixed installation and
ProSound application using, for example, D-Lite,
Forum, VariLine or Cobra Series speaker systems. The
power amps are protected against thermal and
electrical overload as well as short-circuit and the
occurrence of RF or DC voltage at the outputs.
Speaker system switch-on is delayed by a soft start
circuit. Power on delay (0 – 2.25 seconds) is available.
An inrush-current limiter circuit additionally protects
mains fuses from being blown. Monitoring the power
amplifier and connected loudspeaker systems from a
computer using the IRIS-Net PC software application is
possible after retrofitting an optionally available
Remote Control Module (e.g. RCM-810).
Parts included
Quantity
Component
1
Power amplifier
1
Power cord
1
Output Euroblock connector 8-pole (Phoenix, IC 2,5/8STF-5,08, 1825378, F.01U.103.369) with Euroblock
connector housing (Phoenix, KGS-MSTG 2.5/8,
1783779, F.01U.103.370)
2
Input Euroblock connector 6-pole (Phoenix, MC 1,5/6STF-3,81, 1827745, F.01U.104.179)
1
Power remote Euroblock connector 2-pole (Phoenix,
MC 1,5/2-STF-3,81, 1827703, F.01U.103.533)
1
User manual
2 | DSA 8405
Technical specifications
Low impedance mode
High impedance mode
2Ω
4Ω
8Ω
70 V/10 Ω
100 V/20 Ω
Maximum midband output power,
THD = 1%, 1 kHz, 4 channels
driven
500 W
500 W
250 W
VLD: 500 W
500 W
500 W
Rated output power, THD < 0.3%,
20–20 000 Hz, 4 channels driven
450 W
450 W
225 W
VLD: 450 W
450 W
450 W
Maximum bridged output power,
THD = 1%, 1 kHz
-
1000 W
1000 W
1000 W/20 Ω
1000 W/40 Ω
Alarm power rating (according to
EN 54-16)
-
325 W
250 W
VLD: 325 W
325 W
325 W
Maximum RMS voltage swing,
THD = 1%, 1 kHz
32 V
45 V
45 V
VLD: 63 V
70 V
100 V
Power Bandwidth, THD = 1%, ref.
1 kHz, half power at rated load
10–25000 Hz
Voltage gain, ref. 1 kHz
32 dB
32 dB
32 dB
33 dB
36 dB
Input Sensitivity, rated power,
1 kHz
0.775 V (0.0 dBu)
1.1 V (+3.0 dBu)
1.1 V (+3.0 dBu)
1.55 V (+6.0 dBu)
1.55 V (+6.0 dBu)
THD at rated output power, MBW =
80 kHz, 1 kHz
< 0.05%
IMD-SMPTE, 60 Hz, 7 kHz
< 0.05%
DIM30, 3.15 kHz, 15 kHz
< 0.02%
Maximum input level
+22 dBu (9.76 Vrms)
Crosstalk, ref. 1 kHz, at rated
output power
< -80 dB
Frequency response, ref. 1 kHz,
8 Ω load
15–30000 Hz (±1 dB)
Input impedance, active balanced
20 kΩ
Damping factor, 1 kHz, 8 Ω
> 240
Slew rate
28 V/μs
Signal-to-noise ratio (A-weighted)
98 dB
100 dB
100 dB
104 dB
106 dB
Output noise, A-weighted
< -66 dBu
< -65 dBu
< -65 dBu
< -65 dBu
< -64 dBu
Output stage topology
Class D
Power requirements
220-240 V, 50-60 Hz or 120 V, 50-60 Hz or 100 V, 50-60 Hz
In-rush current
27 A
In-rush current, after five-second
power cycle
14 A
Power consumption, 1/8
maximum output power
490 W
Protection
Audio Limiters, High Temperature, DC, HF, Short Circuit, Peak Current Limiters, Inrush Current Limiters, Turn-on
Delay, Mains Circuit Breaker Protection, Mains Over/Undervoltage Protection
Cooling
Front-to-Rear, temperature controlled fans
Electromagnetical environment
E1, E2, E3
50–25000 Hz
3 | DSA 8405
Operating temperature
+5° to +40° C
Safety class
I
Product dimensions (Width x
Height x Depth)
483 x 88.1 x 420.8 mm
Net weight
11.1 kg
* Depending on the ambient temperature, the unit might not operate continuously at 2 Ω load in Dual Mode or 4 Ω load in Bridged Mode. In addition
input power exceeds 1.1 times rated power consumption with at 2 Ω load in Dual Mode or 4 Ω load in Bridged Mode.
4 | DSA 8405
Circuit diagram
5 | DSA 8405
Dimensions
Certifications and approvals
EN 54-16: 2008
6 | DSA 8405
Ordering information
DSA 8405 (100V)
Class-D Amplifier, VLD, Remote opt.; 4x 500W; 2 HU
Order number F.01U.100.865
DSA 8405 (120V)
Class-D Amplifier, VLD, Remote opt.; 4x 500W; 2 HU
Order number F.01U.100.864
DSA 8405 (220-240V)
Class-D Amplifier, VLD, Remote opt.; 4x 500W; 2 HU
Order number F.01U.100.863
LML-1
Line measuring load
Order number F.01U.266.132
RCM-810
RCM-810 Remote Control Module for IRIS-Net
Order number F.01U.101.277
RMK-15
Rack Mount Kit for amplifiers, Length 15,5“; 1L/1R
Order number F.01U.135.402
Bosch Sicherheitssysteme GmbH
Robert-Bosch-Ring 5
85630 Grasbrunn
Germany
www.dynacord.com
© Bosch Sicherheitssysteme GmbH, 2014 | Data subject to change without notice
Document Number F01U100863 | Vs1 | 21. Jan 2014
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