ALT 8x8 G4 — Line Transfer Unit
EN54-Certified 70V and 100V Speaker Line Distribution for AVEC G4
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Industry use
Flexible architecture
Made in Finland. Certified for safety.
Public address and voice evacuation systems distribute audio over long cable runs to many speakers. Stepping up the amplifier output to a constant 70V or 100V voltage minimises power loss across distance and allows multiple speakers with individual power taps to share a single cable run — the standard approach for large buildings, transport infrastructure and maritime vessels. The ALT 8x8 G4 does this for eight amplifier channels simultaneously, with galvanic isolation and EN 54-16 compliant line monitoring on every channel. It also delivers 24VDC priority voltage to attenuation override relays across all speaker lines, ensuring emergency announcements are always heard regardless of local volume settings. For continuous high-load use, an integrated cooling fan version is available.
Typical Applications
• Schools and educational institutions
• Retail environments and shopping centres
• Hospitals and healthcare facilities
• Public transportation hubs — ports, stations, terminals
• Industrial complexes and infrastructure
• Maritime — ferries, cruise ships and special-purpose vessels
System capabilities at a glance
Main Features
• Converts low-impedance (4 Ω) ADA 8x8 G4 outputs to 70V or 100V constant-voltage speaker lines
• 8 independent transformer channels with galvanic isolation
• 120W per channel (max.), 240W with two outputs in parallel
• 24VDC priority voltage for attenuation bypass relays on every line
• Fail-safe priority mode — relay activates when voltage is absent
• Output voltage selectable between 70V and 100V per channel (factory default: 100V)
• Available with integrated cooling fan for high-load, continuous-duty installations
• EN 54-16 and EN 60945 certified
• DNV and Bureau Veritas type approval for maritime use
• Designed and manufactured in Finland
