Altavoz ATEX Exponencial 25 Watios DSP-25 EExmNT, IIB/IIC, 100V

The DSP-25 EExmNT 25 Watt ATEX Exponential Loudspeaker, Class IIB/IIC, 100V, is a public address system specifically designed for use in hazardous or potentially explosive environments. It is a highly secure and robust device.

Primary Purpose: Explosive Atmospheres (ATEX)
Its most important feature is its ATEX certification (from the French Atmosphères Explosibles).

Application: This loudspeaker is designed for installation in Hazardous Areas (Zones 1 and 2 for gas, and Zones 21 and 22 for dust), such as oil refineries, chemical plants, fuel depots, gas loading docks, grain silos, etc.

Explosion-Proof Design: The construction is designed to completely contain any spark or internal hot component that could cause an explosion within the loudspeaker, or to completely prevent the ingress of gas or dust.

Meaning of the Certifications
The long string of codes indicates its protection level and method:

Exponential (Horn): Refers to its shape. It is a cone-shaped horn designed to project sound over long distances and with high intensity, crucial for evacuation messages to be heard above industrial noise.

25 Watts, 100V:

25W: This is the maximum rated power.

100V: Indicates that it uses the high-impedance line (100-volt line) typical of professional public address systems, allowing many speakers to be connected in series over long distances using thin cables.

Power Taps: It usually has several selectable taps, for example, 25W, 12.5W, 6W, 4W, 2W, and 1W, allowing the installer to adjust the volume of each unit.

EExmNT (or DSP-25EExmNT): This designation indicates the type of protection used:

Ex: Complies with European standards for explosive atmospheres.

d (Flameproof), e (Increased Safety), mb (Encapsulation): Indicates a combination of protective techniques (the complete model includes d e mb or similar) to ensure maximum safety.

IIB/IIC (Gas Group): Indicates the gas group with which it can operate safely:

IIB: Suitable for gases in group IIB (such as ethylene).

IIC: Suitable for gases in group IIC (the most stringent, including hydrogen and acetylene). This means the speaker is safe for the most hazardous gas environments.

Physical and Performance Characteristics

Material: Antistatic polyamide, resistant to corrosion and weathering.

IP Rating
IP66/IP67 (High protection against dust and powerful water jets, ideal for outdoor or dirty industrial environments).
Sound Level (SPL)
High, typically reaching 117 dB at maximum power, necessary to overcome the noise of industrial machinery.
Frequency Response
Focused on voice (approximately 370 Hz to 7 kHz), ensuring maximum intelligibility for evacuation messages.
Temperature
Resistant to extreme temperatures (e.g., -53°C to +55°C).

In short, this is not an ordinary music speaker, but a critical safety device designed to deliver announcements and emergency messages audibly and safely in the most demanding environmental conditions.