Vintage Soviet Horn Loudspeaker 10GRD IV-5 (1978) – Large Industrial PA Speaker

Original Soviet-era horn loudspeaker model 10ГРД IV-5, manufactured in 1978.

A robust and directional public address (PA) speaker designed for high-noise environments and long-distance sound projection.

🔧 Historical Background

This type of loudspeaker was widely used across the USSR from the 1960s onward for:

 • public announcement systems (factories, plants, construction sites)

 • railway stations and transport hubs

 • military and civil defense systems

 • outdoor broadcasting in cities and villages

Its purpose was simple: clear speech transmission over large distances and in noisy environments.  

⚙️ Technical Specifications

 • Model: 10ГРД IV-5

 • Type: Horn (directional) loudspeaker

 • Power handling: 2.5 / 5 / 10 W  

 • Line voltage: 30 / 120 / 240 V  

 • Frequency response: approx. 200 – 4000 Hz  

 • Designed for: speech transmission (not hi-fi music)

 • Construction: metal horn + internal driver with transformer

 • Operating conditions: outdoor use, resistant to harsh environments (−40°C to +60°C)  

📏 Dimensions & Weight (approx.)

 • Length: ~45 cm

 • Horn diameter: ~40 cm

 • Weight: ~6 kg  

🧱 Design & Build

 • Heavy-duty industrial construction

 • Adjustable mounting bracket

 • Highly directional sound projection

 • Classic Soviet utilitarian design