---
title: "The LDA ONE system obtains EN 54-16 and EN 54-4 certificates"
description: "LDA Audio Tech has obtained the EN 54-16 and EN 54-4 certificates for its new ONE PA/VA system"
url: https://lda-audiotech.com/en/2019/01/29/lda-one-system-obtains-en54-certificates/
date: 2019-01-29
modified: 2026-08-18
author: "LDA Marketing"
image: https://lda-audiotech.com/wp-content/uploads/2019/01/LDA_ONE_EN-54.jpg
categories: ["News"]
type: post
lang: en
---

# The LDA ONE system obtains EN 54-16 and EN 54-4 certificates

LDA Audio Tech has obtained the **EN 54-16 and EN 54-4 certificates** for its new ONE PA/VA system. It is the **most compact equipment on the market** that has this double certification for both the control unit and its built-in battery charger.

The **certificate 0370-CPR-3206** guarantees that the [ONE-500 unit](https://lda-audiotech.com/en/one/) complies with the European standard EN 54-16 on voice alarm control and indicating equipment, and its [integrated charger ONE-BC1](https://lda-audiotech.com/en/productos-lda/battery-charger-card-one-bc1/) conforms to the EN 54-4 standard for power supply equipment.[Download ONE’s EN 54 certificate](https://lda-audiotech.com/en/web-support/resources-library/?tipo-archivo=en54_certificate&familia=one)These certifications, issued by the Applus + laboratory, warrant the **public address, background music and voice alarm** system ONE strictly complies with all the requirements demanded by the Construction Products Regulation (EU) 305/2011 for fire detection and alarm equipment.

### **ONE, full of functionalities**

LDA ONE includes **charger and battery in the same unit**, an industry first in this segment, where it is usually sold separately. ONE has two class D amplifiers up to 500 W (maximum total power of 500 W according to EN 60065 and 200 Wrms according to EN 54-16) and a backup amplifier, with 6 outputs/zones, 3 analog audio inputs and one 6×6 expandable digital matrix.

The innovative ONE **Wall & Rack design** allows wall mounting or installation in a 19″ rack, adapting smoothly to any space requirements in any kind of installations.

### **The EN 54 standard**

The **EN 54 harmonized technical standard** not only applies in the European Union but has become a *de facto* international standard due to the strict EC certification scheme for marketing this kind of products.

The EN 54 series of European standards for **detection systems, fire alarm and voice evacuation** covers three different groups: for central voice alarm control (EN 54-16), for loudspeakers (EN 54-24) and for power supply audio equipment (EN 54-4).

LDA Audio Tech offers integrators and installers a **complete range of solutions** fully adapted to the EN 54 standard, including the NEO series, [loudspeakers](https://lda-audiotech.com/en/category/productos-en/altavoces-en/) and [accessories](https://lda-audiotech.com/en/category/productos-en/accessories/).[Download ONE’s documentation](https://lda-audiotech.com/en/web-support/resources-library/?familia=one)