What are the three types of amplifiers?

The three main amplifier classes used in professional audio are Class-AB, Class-D and Class-H. Class-AB amplifiers offer excellent sound quality with moderate efficiency (50–65 per cent), making them popular in high-fidelity applications. Class-D amplifiers achieve efficiency above 85 per cent through pulse-width modulation, reducing heat and power consumption — they dominate the installation amplifier market. Class-H amplifiers use multiple power-supply rails to improve efficiency over Class-AB while maintaining similar sonic characteristics, often found in high-power touring systems. Installation amplifiers predominantly use Class-D technology for its efficiency, compact size and silent operation.

What is an integrated amplifier?

An integrated amplifier combines a preamplifier and power amplifier in a single chassis, providing both input switching, volume control, tone shaping and speaker-driving capability. In the installation context, integrated amplifiers often include additional features such as multi-zone control, DSP processing, network audio inputs and media playback, eliminating the need for separate source equipment and processors. This all-in-one approach simplifies system design, reduces rack space and lowers total cost. Modern installation amplifiers with built-in Bluetooth, USB playback and Dante networking are effectively integrated amplifiers optimised for commercial and event applications.

When do you need an amplifier?

You need an amplifier whenever passive loudspeakers are used in an audio system, as they require external power to convert line-level signals into acoustic output. Installation amplifiers are essential in distributed audio systems for background music, paging announcements, conference-room sound and multi-zone entertainment. They are also required when upgrading from consumer-grade active speakers to professional passive systems, which offer superior sound quality, reliability and scalability. In event and commercial installations, amplifiers provide centralised power and control, enabling efficient management of dozens or hundreds of speakers from a single equipment rack.

Which power amplifier is the best?

The best power amplifier depends on your specific application, budget and performance requirements. For multi-zone commercial installations, MONACOR and AUDAC matrix amplifiers offer exceptional reliability, comprehensive DSP and flexible zone control at competitive prices. High-power applications such as theatres and concert halls benefit from Powersoft and Lab.gruppen models with advanced damping, low distortion and network monitoring. For budget-conscious projects, Omnitronic installation amplifiers deliver solid performance and essential features without compromising build quality. Always match the amplifier's power rating, channel count and feature set to your system design, and prioritise brands with proven track records in permanent installations.

Where are installation amplifiers used?

Installation amplifiers are used in commercial buildings, hospitality venues, houses of worship, educational institutions, transport hubs, retail stores, conference centres, theatres and sports facilities. Typical applications include background music distribution, public-address systems, multi-room audio in hotels and restaurants, conference-room sound reinforcement, emergency voice-alarm systems and architectural audio in museums and galleries. Any environment requiring permanent, reliable audio distribution across multiple zones benefits from installation amplifiers. They are also deployed in residential projects where whole-home audio, outdoor entertainment areas and home-cinema systems demand professional-grade performance and control.

How many zones can be realised with a multi-zone amplifier?

Multi-zone installation amplifiers typically support 2 to 16 independent zones, with the exact number depending on the model and manufacturer. Entry-level units offer 2–4 zones, suitable for small offices, boutique hotels and houses of worship. Mid-range models provide 6–8 zones, ideal for larger hospitality venues, conference centres and retail chains. High-end matrix amplifiers deliver 12–16 zones with full DSP, routing and priority control, meeting the demands of convention centres, airports and multi-building campuses. Some systems allow multiple amplifiers to be networked together, creating virtually unlimited zone counts managed from a central control interface.

Can I control volume room by room with an installation amplifier?

Yes, multi-zone installation amplifiers provide independent volume control for each zone, allowing you to adjust levels room by room without affecting other areas. Control is typically via wall-mounted volume panels, smartphone apps, web interfaces or integration with building-automation systems such as KNX, Crestron and Control4. Each zone can also have its own source selection, EQ settings and mute status. This flexibility is essential in hotels, conference centres and commercial buildings where different spaces have different acoustic requirements and usage patterns. Advanced models support preset recall, enabling instant switching between configurations for different events or times of day.

What is the difference between 100V line and low-impedance amplifiers?

100V line (constant-voltage) amplifiers use step-up transformers to deliver high voltage at low current, enabling long cable runs and parallel connection of many speakers without impedance-matching calculations. Each speaker has a transformer that taps the required wattage, and the amplifier sees a stable load regardless of how many speakers are connected. This is ideal for distributed systems in large buildings. Low-impedance amplifiers (4Ω/8Ω) connect directly to speakers without transformers, offering superior frequency response and transient detail but requiring careful impedance matching and shorter cable runs. Most installation amplifiers support both modes, allowing you to choose the best topology for each zone based on speaker placement, cable length and sonic requirements.

Installation amplifiers

MONACOR PA-M224 2-zone PA matrix mixing amplifier

2-zone PA matrix mixing amplifier 240 W per zone • 2 zones, can be controlled individually, with 2-way tone control • Class D concept with a high efficiency to cut energy costs • 4...

€1,049.00 *

incl. tax, free shipping to Germany
[International shipping costs]

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

MONACOR PA-M412 4-zone PA matrix mixing amplifier

4-zone PA matrix mixing amplifier 120 W per zone • 4 zones, can be controlled individually with 2-way tone control • Class D concept with a high efficiency to cut energy costs • 4...

€1,486.00 *

incl. tax, free shipping to Germany
[International shipping costs]

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

MONACOR PA-4120D 4-channel class D PA power amplifier

4-channel class D PA power amplifier 4 x 120 W • Class D concept with a high efficiency to cut energy costs • Temperature-controlled fan, continuously adjustable • Connection for...

€1,010.00 *

incl. tax, free shipping to Germany
[International shipping costs]

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

OMNITRONIC CPZ-120P PA Mixing Amplifier

4-zone-PA mixing amplifier with audio player, IR remote control and Bluetooth, switchable zones, 120 W RMS 4 PA zone outputs, independently switchable on the front panel • Output for...

€231.78 *

incl. tax, free shipping to Germany
[International shipping costs]

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

Power Dynamics Powerline A50B In-Wall Audio Verstärker BT Schwarz

Power Dynamics Powerline A50B In-Wall Audio Amplifier BT Black

The Powerline series are in-wall music systems with a built-in amplifier and a music player. The sleek elegant finish with a touch sensitive panel provides a minimalist look, so your sound is heard...

Express delivery possible

€79.90 *

incl. tax, free shipping to Germany
[International shipping costs]

Express delivery possible

Availability:

Low stock; Delivery time: 1-3 days

Delivery time: 1-3 days

Power Dynamics Powerline A100B In-Wall Audio Verstärker BT Schwarz

Power Dynamics Powerline A100B In-Wall Audio Amplifier BT Black

The Powerline series are in-wall music systems with a built-in amplifier and a music player. The sleek elegant finish with a touch sensitive panel provides a minimalist look, so your sound is heard...

Express delivery possible

€99.90 *

incl. tax, free shipping to Germany
[International shipping costs]

Express delivery possible

Availability:

Delivery time: 1-3 days

Delivery time: 1-3 days

Power Dynamics Powerline A100W In-Wall Audio Verstärker BT Weiß

Power Dynamics Powerline A100W In-Wall Audio Amplifier BT White

The Powerline series are in-wall music systems with a built-in amplifier and a music player. The sleek elegant finish with a touch sensitive panel provides a minimalist look, so your sound is heard...

€99.90 *

incl. tax, free shipping to Germany
[International shipping costs]

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

Power Dynamics PDW360MP3 PA-Mixer-Verstärker 360W/100V 6 Zonen

Power Dynamics PDW360MP3 PA Mixer Amplifier 360W/100V 6 zones

The PDW series is a series rack-mountable amplifiers that can either be used as 100V amplifier or as a standard low-impedance amplifier. These fully featured, high power mixer amplifiers with 6...

Express delivery possible

€429.00 *

incl. tax, free shipping to Germany
[International shipping costs]

Express delivery possible

Availability:

Delivery time: 1-3 days

Delivery time: 1-3 days

Power Dynamics PDW500MP3 PA-Mixer-Verstärker 500W/100V 6 Zonen

Power Dynamics PDW500MP3 PA Mixer Amplifier 500W/100V 6 zones

The PDW series is a series rack-mountable amplifiers that can either be used as 100V amplifier or as a standard low-impedance amplifier. These fully featured, high power mixer amplifiers with 6...

€499.00 *

incl. tax, free shipping to Germany
[International shipping costs]

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

MONACOR EPS30/100V-MI 100-V-ELA-Verstärker, Hutschiene

MONACOR EPS30/100V-MI 100 V PA amplifier

100 V PA amplifier For mounting onto DIN rails according to DIN EN 60715, 4 HP • 1-channel class D amplifier • 100 V PA transformer • Input balanced and unbalanced • Microphone...

€320.11 *

incl. tax, free shipping to Germany
[International shipping costs]

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

OMNITRONIC PAP-1000 PA Amplifier

PA power amplifier, 1000 W RMS 1 line input (optionally XLR or 6.3 mm jack) • 1 feed-through output (optionally XLR or 6.3 mm jack) • Master control • LED indicators for power,...

€799.00 *

incl. tax, free shipping to Germany
[International shipping costs]

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

Power Dynamics PRC120 100V Mixer-Verstärker mit CD 120W

Power Dynamics PRC120 100V Mixer Amplifier with CD 120W

The PRC120 is a rack-mountable mixer-amplifier that can either be used as 100V amplifier or as a standard low-impedance amplifier. Features 5 input channels include a balanced XLR microphone input...

€299.00 *

incl. tax, free shipping to Germany
[International shipping costs]

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

Power Dynamics PAM2004 4-Zonen Matrix-Verstärker 4x 200W

Power Dynamics PAM2004 4-Zone Matrix Amplifier 4x 200W

The PAM2004 is a ultimate 4-channel mixer amplifier designed for commercial installations with up to 4 zones. Whether you're looking to upgrade your restaurant, retail store, or any other...

€649.00 *

incl. tax, free shipping to Germany
[International shipping costs]

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

DAP-Audio ZA-9120DAB 120 W 100 V 2-Zonen-Mischverstärker

DAP-Audio ZA-9120DAB 120 W 100 V 2-Zone Mixer Amplifier

4 stereo in, 3 mic in, FM/DAB+ tuner & USB player • Line-output per zone & special output for only music/mics • Chime & Ducking • Loop-through connection • 19"...

€499.00 *

incl. tax, free shipping to Germany
[International shipping costs]

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

DAP-Audio ZA-9250DAB 250 W 100 V 4-Zonen-Mischverstärker

DAP-Audio ZA-9250DAB 250 W 100 V 4-Zone Mixer Amplifier

4 stereo in, 3 mic in, FM/DAB+ tuner & USB player • Line-output per zone & special output for only music/mics • Chime & Ducking • Loop-through connection • 19"...

€593.39 *

incl. tax, free shipping to Germany
[International shipping costs]

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

DAP-Audio ZA-9250VDAB 250 W 100 V 4-Zonen-Mischverstärker mit einstellbaren Zonenlautstärken

DAP-Audio ZA-9250VDAB 250 W 100 V 4-Zone Mixer Amplifier with adjustable zone volume levels

4 stereo in, 3 mic in, FM/DAB+ tuner & USB player • Line-output per zone & special output for only music/mics • Chime & Ducking • Loop-through connection • 19"...

€699.00 *

incl. tax, free shipping to Germany
[International shipping costs]

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

MONACOR PA-4125DX/DT

characteristics Dante® is a network protocol based on three-layer IP technology that provides a low-latency, high-precision, low-cost solution for point-to-point audio connections. Dante®...

€999.95 *

incl. tax, free shipping to Germany
[International shipping costs]

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

Power Dynamics Powerline B50B Wand-Audioverstärker BT/LCD Schwarz

Power Dynamics Powerline B50B In Wall Audio Amplifier BT/LCD Black

The Powerline series are in wall music systems with a built-in amplifier and a music player. The sleek elegant finish with a touch sensitive panel provides a minimalist look, so your sound is heard...

€99.90 *

incl. tax, free shipping to Germany
[International shipping costs]

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

Power Dynamics Powerline B50W Wand-Audioverstärker BT/LCD Weiß

Power Dynamics Powerline B50W In Wall Audio Amplifier BT/LCD White

The Powerline series are in wall music systems with a built-in amplifier and a music player. The sleek elegant finish with a touch sensitive panel provides a minimalist look, so your sound is heard...

€99.90 *

incl. tax, free shipping to Germany
[International shipping costs]

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

Power Dynamics Powerline B100B Wand-Audioverstärker BT/LCD Schwarz

Power Dynamics Powerline B100B In Wall Audio Amplifier BT/LCD Black

The Powerline series are in wall music systems with a built-in amplifier and a music player. The sleek elegant finish with a touch sensitive panel provides a minimalist look, so your sound is heard...

€119.90 *

incl. tax, free shipping to Germany
[International shipping costs]

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

Power Dynamics Powerline B100W Wand-Audioverstärker BT/LCD Weiß

Power Dynamics Powerline B100W In Wall Audio Amplifier BT/LCD White

The Powerline series are in wall music systems with a built-in amplifier and a music player. The sleek elegant finish with a touch sensitive panel provides a minimalist look, so your sound is heard...

€119.90 *

incl. tax, free shipping to Germany
[International shipping costs]

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

INTUSONIC 4SDL160 Class-D Verstärker 4x150W

INTUSONIC 4SDL160 Class-D Amplifier 4x150W

The INTUFORCE 4SDL160 is -- despite its simple front panel layout -- a highly versatile system amplifier for low-impedance sound systems. Via its comprehensive rear-panel controls, it can be set...

€459.00 *

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[International shipping costs]

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

NEW

INTUSONIC VAA22 Einbau Vorverstärker/Mixer

INTUSONIC VAA22 Mounting Preamplifier/Mixer

The INTUPAK VAA22 is the smallest and most unobtrusive solution to audio connectivity and preamplification in any room. It offers three audio sources, starting with a 3.5mm stereo TRS input,...

€99.00 *

incl. tax, free shipping to Germany
[International shipping costs]

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

LD Systems AMP 106 T - 1-Kanal Mini Installationsendstufe 60 W @ 4 Ohm / 70V/100V

LD Systems AMP 106 T - 1-Channel Mini Installation Power Amplifier 60 W @ 4 Ohm / 70V/100V

1-channel mini installation amplifier 60 W @ 4 Ohm / 70V/100V Professional mini amplifier • 60W Class-D amplifier with Lo-Z / Hi-Z selector switch between 4 ohms / 100V / 70V outputs...

Express delivery possible

Sale to reseller only

Express delivery possible

Availability:

Delivery time: 1-3 days

Delivery time: 1-3 days

Details