PRA-AD608
Bosch PRA-AD608 PRAESENSA 600W 8-Channel Amplifier, Network‑connected, DC‑powered, 8‑channel, 600W, power amplifier with integrated spare channel and DSP functions, Flexible power partitioning across all channels, Low power consumption and heat loss, Full supervision with integrated fail‑safe redundancy, Digital signal processing per channel, IP‑networked on OMNEO for audio and control, Number of analog inputs: 1, Number of Ethernet ports: 2, 48 kHz Sample rate, 70V/100V Rated output voltage, 20 - 20000 Hz Frequency response, Maximum loudspeaker load 100V/70V mode: 600W, IP30.
Praesense Amplifier
Bosch PRA-AD608 PRAESENSA 600W 8-Channel Amplifier
Efficient 8‑channel Power Amplifier
Transformerless, galvanically isolated, 70/100 V outputs, with a total loudspeaker output power of 600 W.
Sound Quality
Audio‑over‑IP, using OMNEO, the Bosch high‑quality digital audio interface, compatible with Dante & AES67; audio sample rate is 48 kHz with 24‑bit sample size
Loudspeaker load
Maximum loudspeaker load 100V mode, 70 V mode all channels: 600 W
Supervision
Controller continuity: Watchdog, Temperature: Overheat, Fan: Rotation speed, Network interface: Link presence
DSP & OMNEO
Digital signal processing per channel
IP‑networked on OMNEO for audio and control
PRA-AD608 Amplifier, 600W 8-channel |
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Operating voltage (VDC) |
44 - 60 VDC |
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Power consumption (W) |
250 W maximum |
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Number of outputs |
8 |
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Maximum output power (W) |
600 W burst |
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Number of analog inputs |
1 |
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Number of Ethernet ports |
2 |
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Protocols and interfaces |
OMNEO; AES 70 |
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Sample rate (kHz) |
48 kHz |
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Signal processing |
Equalization; Limiter; Delay; Level |
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Rated output voltage (V) |
70;100 V |
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Frequency response (Hz) |
20 - 20000 Hz |
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Minimum signal-to-noise ratio (dBA) |
107 dBA |
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Pilot tone frequency (kHz) |
25,50 kHz |
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Pilot tone level (V) |
3 V |
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Protection |
Overheat; Overload; RM S output power limiter; Ground fault; Watchdog; DC output; RSTP; Spare channel; Lifeline |
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Degree of protection (IEC 60529) |
IP30 |
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Operating temperature (°C) |
-5 - 50°C |
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Dimension (H x W x D mm) |
44 x 483 x 400 mm |
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Weight (kg) |
8.80 kg |
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Electrical |
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Loudspeaker load |
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Maximum loudspeaker load 100 V mode, all channels * 70 V mode, all channels* |
600 W 600 W |
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Minimum loudspeaker load impedance 100 V mode, all channels* 70 V mode, all channels* |
16.7 ohm 8.3 ohm |
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Maximum cable capacitance 100 V mode, all channels * 70 V mode, all channels* |
2 uF 2 uF |
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*All channels combined. |
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Amplifier outputs |
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Rated output voltage 100 V mode, 1 kHz, THD <1 %, no load 70 V mode, 1 kHz, THD <1 %, no load |
100 VRMS 70 VRMS |
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Burst / rated power** All channels combined 100 V mode, load 16.7 ohm 70 V mode, load 8.3 ohm |
600 W / 150 W 600 W / 150 W |
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Channel 1 100 V mode, load 16.7 ohm // 20 nF 70 V mode, load 11.7 ohm // 20 nF |
600 W / 150 W 420 W / 105 W |
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Other channels 100 V mode, load 33.3 ohm // 20 nF 70 V mode, load 16.7 ohm // 20 nF |
300 W / 75 W 300 W / 75 W |
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Full to no load regulation 20 Hz to 20 kHz |
< 0.2 dB |
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Frequency response Rated power, +0.5 / -3 dB |
20 Hz to 20 kHz |
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Amplifier outputs |
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Total Harmonic Distortion + Noise (THD+N) Rated power, 20 Hz to 20 kHz 6 dB below rated power, 20 Hz to 20 kHz |
< 0.5 % < 0.1 % |
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Intermodulation Distortion (ID) 6 dB below rated power, 19+20 kHz, 1:1 |
< 0.1 % |
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Signal to Noise Ratio (SNR) 100 V mode, 20 Hz to 20 kHz 70 V mode, 20 Hz to 20 kHz |
> 110 dBA typical > 107 dBA typical |
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Crosstalk between channels 100 Hz to 20 kHz |
< -84 dBA |
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DC offset voltage |
< 50 mV |
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Signal processing per channel Audio equalization Level control Level control resolution Audio delay Audio delay resolution RMS power limiter |
7-section parametric 0 to -60 dB, mute 1 dB 0 to 60 s 1 ms Rated power |
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Lifeline Sensitivity (100 V out) Mute attenuation Signal to Noise Ratio (SNR) |
0 dBV > 80 dB > 90 dBA |
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**Full voltage swing into maximum loudspeaker load for speech and music program material (crest factor > 9 dB) |
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Power transfer |
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Power supply input A/B Input voltage Input voltage tolerance |
48 VDC 44 to 60 VDC |
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Power consumption (48 V) Sleep mode, no supervision Snooze mode, supervision active Active mode, idle Active mode, low power Active mode, rated power Per active port |
6.0 W 8.9 W 54 W 74 W 246 W 0.4 W |
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Heat loss (including power supply) Active mode, idle Active mode, low power Active mode, full power |
23 7kJ/h (157 BTU/h) 325 kJ/h (215 BTU/h) 434 kJ/h (321 BTU/h) |
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Supervision |
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End‑of‑Line detection mode |
Pilot tone 25.5 kHz, 3 VRMS |
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Power supply input A/B |
Undervoltage |
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Ground short detection (loudspeaker lines) |
< 50 kohm |
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Amplifier channel redundancy switching |
Internal spare channel |
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Amplifier channel load |
Short circuit |
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Supervision |
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Loudspeaker line redundancy switching |
A/B group, Class‑A loop |
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Controller continuity |
Watchdog |
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Temperature |
Overheat |
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Fan |
Rotation speed |
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Network interface |
Link presence |
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Network interface |
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Ethernet |
100BASE‑TX, 1000BASE‑T |
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Protocol |
TCP/IP |
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Redundancy |
RSTP |
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Audio/control protocol |
OMNEO |
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Network audio latency |
10 ms |
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Audio data encryption |
AES128 |
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Control data security |
TLS |
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Ports |
2 |
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Reliability |
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MTBF (calculated according to Telcordia SR‑332 Issue 3) |
300.000 h |
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Environmental |
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Climatic conditions |
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Temperature Operating |
-5 to +50 °C (23 to 122 °F) |
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Storage and transport |
-30 to +70 °C (-22 to 158 °F) |
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Humidity (non-condensing) |
5 to 95 % |
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Air pressure (operating) |
560 to 1070 hPa |
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Altitude (operating) |
-500 to +5000 m (-1640 to 16404 ft) |
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Vibration (operating) Amplitude Acceleration |
< 0.7 mm < 2 G |
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Bump (transport) |
< 10 G |
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Airflow |
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Fan airflow |
Front to sides/rear |
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Fan noise Idle condition, 1 m distance Rated power, 1 m distance |
< 30 dB SPLA < 53 dB SPLA |
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Mechanical |
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Enclosure |
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Dimensions (HxWxD) With mounting brackets Rack unit |
44 x 483 x 400 mm (1.75 x 19 x 15.7 in) 19 in, 1U |
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Ingress protection |
IP30 |
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Case Material Color |
Steel RAL9017 |
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Frame Material Color |
Zamak RAL9022HR |
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