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
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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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EVID-S8.2TB: Product FAQs
The Electro-Voice EVID-S8.2TB is an 8-inch two-way surface-mount speaker supplied as a black pair. It is designed for background and foreground music, paging and sound reinforcement in restaurants, retail stores, fitness clubs and hospitality venues.
Yes. Its built-in 60 W transformer supports 70 V and 100 V systems, with selectable 15 W, 30 W and 60 W taps. A 7.5 W tap is available for 70 V systems only. An 8-ohm bypass also supports low-impedance operation.
Yes. The EVID-S8.2TB has an IP54-rated enclosure for indoor and outdoor applications. Its included mounting system supports wall or ceiling installation, with 90° horizontal and 45° vertical adjustment.
The EVID-S8.2TB comes with a pre-assembled mounting system for wall or ceiling installation. It allows 90° horizontal and 45° vertical adjustment to position the speakers. Mounting brackets and a 5 mm Allen wrench are included.
ESCO (Electronic Security Company) is an official Electro-Voice dealer in Pakistan.
Built for Commercial Audio Installation
The Electro-Voice EVID-S8.2TB combines a paintable, fire-rated ABS enclosure with a zinc-plated, powder-coated grille. Connections through the wall-mounted bracket help conceal wiring, while removable locking Euroblock connectors support additional speakers on a distributed line. Its rotatable grille logo accommodates horizontal positioning, and the EVID-S range is designed to work alongside other EVID ceiling and in-wall speakers.
Paintable ABS Enclosure
The fire-rated ABS enclosure can be painted to match the installation décor. The EVID-S8.2TB comes in black RAL 9004.
Corrosion-Resistant Grille
A zinc-plated, powder-coated grille provides corrosion resistance as part of the speaker’s weather-resistant construction.
Concealed Wall-Bracket Wiring
Electrical connections pass through the wall-mounted portion of the mounting system, allowing wiring to remain hidden for a clean installation.
Quick-Attach Mounting
The ball-and-socket mounting system features quick attachment and detachment, with the support bracket integrated into the enclosure.
Locking Euroblock Connections
Removable locking 4-pin Euroblock connectors provide an additional connection option and support wiring to further speakers in a distributed line.
Protected Bypass Selection
A rear-panel switch selects transformer taps or 8-ohm bypass operation. The bypass selection is protected by a safety screw.
Commercial Audio Applications
The Electro-Voice EVID-S8.2TB surface-mount speaker pair is designed for background and foreground music, paging and sound reinforcement across a range of commercial spaces.
Restaurants, Bars & Patios
Support background music, foreground music and paging in dining areas, bars and outdoor patio spaces.
Retail & Hospitality
Provide music and paging in retail stores and hospitality venues using a surface-mount speaker system.
Fitness & Leisure Venues
Use the EVID-S8.2TB for music and sound reinforcement in fitness clubs, theme parks and leisure venues.
