PRA-AD608

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

Operating voltage (VDC)

44 - 60 VDC

Power consumption (W)

250 W maximum

Number of outputs

8

Maximum output power (W)

600 W burst

Number of analog inputs

1

Number of Ethernet ports

2

Protocols and interfaces

OMNEO; AES 70

Sample rate (kHz)

48 kHz

Signal processing

Equalization; Limiter; Delay; Level

Rated output voltage (V)

70;100 V

Frequency response (Hz)

20 - 20000 Hz

Minimum signal-to-noise ratio (dBA)

107 dBA

Pilot tone frequency (kHz)

25,50 kHz

Pilot tone level (V)

3 V

Protection

Overheat; Overload; RM S output power limiter; Ground fault; Watchdog; DC output; RSTP; Spare channel; Lifeline

Degree of protection (IEC 60529)

IP30

Operating temperature (°C)

-5 - 50°C

Dimension (H x W x D mm)

44 x 483 x 400 mm

Weight (kg)

8.80 kg

Electrical

Loudspeaker load

Maximum loudspeaker load

100 V mode, all channels

* 70 V mode, all channels*

 

600 W

600 W

Minimum loudspeaker load impedance

100 V mode, all channels*

70 V mode, all channels*

 

16.7 ohm

8.3 ohm

Maximum cable capacitance 100 V mode, all channels

* 70 V mode, all channels*

 

2 uF

2 uF

*All channels combined.

Amplifier outputs

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

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

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

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

Full to no load regulation 20 Hz to 20 kHz

< 0.2 dB

Frequency response

Rated power, +0.5 / -3 dB

 

20 Hz to 20 kHz

Amplifier outputs

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 %

 

Intermodulation Distortion (ID)

6 dB below rated power, 19+20 kHz, 1:1

 

< 0.1 %

 

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

 

Crosstalk between channels 100 Hz to 20 kHz

< -84 dBA

 

DC offset voltage

< 50 mV

 

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

 

Lifeline

Sensitivity (100 V out)

Mute attenuation

Signal to Noise Ratio (SNR)

 

0 dBV

> 80 dB

> 90 dBA

 

**Full voltage swing into maximum loudspeaker load for speech and music program material (crest factor > 9 dB)

 

Power transfer

Power supply input

A/B Input voltage

Input voltage tolerance

 

48 VDC

44 to 60 VDC

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

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)

Supervision

End‑of‑Line detection mode

Pilot tone

25.5 kHz, 3 VRMS

Power supply input A/B

Undervoltage

Ground short detection (loudspeaker lines)

< 50 kohm

Amplifier channel redundancy switching

Internal spare channel

Amplifier channel load

Short circuit

Supervision

Loudspeaker line redundancy switching

A/B group, Class‑A loop

Controller continuity

Watchdog

Temperature

Overheat

Fan

Rotation speed

Network interface

Link presence

Network interface

Ethernet

100BASE‑TX,

1000BASE‑T

Protocol

TCP/IP

Redundancy

RSTP

Audio/control protocol

OMNEO

Network audio latency

10 ms

Audio data encryption

AES128

Control data security

TLS

Ports

2

Reliability

MTBF (calculated according to Telcordia SR‑332 Issue 3)

300.000 h

Environmental

Climatic conditions

Temperature Operating

-5 to +50 °C

(23 to 122 °F)

Storage and transport

-30 to +70 °C

(-22 to 158 °F)

Humidity (non-condensing)

5 to 95 %

Air pressure (operating)

560 to 1070 hPa

Altitude (operating)

-500 to +5000 m

(-1640 to 16404 ft)

Vibration (operating)

 Amplitude

Acceleration

 

< 0.7 mm

< 2 G

Bump (transport)

< 10 G

Airflow

Fan airflow

Front to sides/rear

Fan noise

Idle condition, 1 m distance

Rated power, 1 m distance

 

< 30 dB SPLA

< 53 dB SPLA

Mechanical

Enclosure

Dimensions (HxWxD)

With mounting brackets

Rack unit

44 x 483 x 400 mm

(1.75 x 19 x 15.7 in)

19 in, 1U

Ingress protection

IP30

Case

Material

Color

 

Steel

RAL9017

Frame

Material

Color

 

Zamak

RAL9022HR

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