Are amplifiers and power amplifiers the same thing?

In professional audio terminology, "amplifier" is a broad term that can refer to any device that increases signal level, including preamplifiers, integrated amplifiers and power amplifiers. A power amplifier specifically refers to the final amplification stage that drives loudspeakers, converting line-level signals into high-current output. In event technology, "power amplifier" and "endstufe" are used interchangeably to describe rack-mount units that power passive PA speakers. Integrated amplifiers combine preamplification and power amplification in one unit, while power amplifiers focus solely on delivering maximum output power with minimal distortion.

What exactly does a power amplifier do?

A power amplifier takes the low-voltage, low-current line-level signal from a mixing desk or DSP processor (typically 1–2 volts) and amplifies it to the high-voltage, high-current levels required to drive passive loudspeakers (often 20–100 volts or more). The amplifier's output stage uses transistors or MOSFETs to control large amounts of electrical power, converting it into the electromagnetic force that moves the loudspeaker's voice coil and cone. Professional power amplifiers also incorporate protection circuits, cooling systems and often DSP processing to ensure reliable, distortion-free performance. Without a power amplifier, passive loudspeakers cannot produce sound.

Which power amplifier is the best?

The "best" power amplifier depends entirely on your application, loudspeaker system and budget. For mobile PA applications, lightweight Class-D amplifiers from manufacturers such as LD Systems, DAP Audio or Skytec offer excellent power-to-weight ratios and efficiency. For fixed installations, models with DSP integration and network control from RCF, dB Technologies or JBL provide superior system management. For high-end touring, heavy-duty Class-AB or Class-H amplifiers deliver maximum sound quality and reliability. Always match amplifier power to your loudspeaker's RMS rating (aim for 1.5–2× speaker power), verify impedance compatibility and ensure the amplifier's feature set meets your operational requirements.

How much power should my amplifier have?

Professional power amplifiers should deliver 1.5 to 2 times the continuous (RMS) power rating of your loudspeakers at the specified impedance. For example, if your passive tops are rated at 500 watts RMS at 8 ohms, choose an amplifier that delivers 750–1000 watts per channel at 8 ohms. This headroom ensures clean, dynamic sound without clipping, particularly during transient peaks. Under-powering speakers can actually cause more damage than over-powering, as clipped signals from a struggling amplifier contain high-frequency distortion that can destroy tweeters. Always verify both the amplifier's power output and the loudspeaker's impedance to ensure safe, optimal matching.

What's the difference between stereo, parallel and bridged mode?

Stereo mode uses both channels of a 2-channel amplifier independently, typically driving left and right loudspeakers or separate tops and monitors. Parallel mode connects both channels to the same input signal, driving two identical loudspeakers with the same mono signal — useful for powering multiple stage monitors from one amplifier. Bridged mode (also called mono mode) combines both channels to drive a single loudspeaker with significantly higher power, typically doubling the output compared to stereo mode. Bridge mode is ideal for subwoofers or high-power tops, but requires a higher minimum impedance (usually 8 ohms) and may reduce damping factor. Always consult the amplifier's manual before using bridge mode.

What are good power amplifier brands?

Leading professional power amplifier brands include RCF, dB Technologies, JBL, LD Systems, DAP Audio, PSSO, Omnitronic, Monacor and Ram Audio. RCF and dB Technologies are renowned for high-end touring amplifiers with advanced DSP and network control. LD Systems offers excellent value for mobile applications, combining Class-D efficiency with robust construction. DAP Audio and PSSO provide reliable, cost-effective solutions for installations and rental companies. JBL and Omnitronic are trusted names with decades of experience in professional audio. At LTT, we stock amplifiers from all these manufacturers, ensuring you can find the perfect match for your system and budget.

Do I need a power amplifier if I have active speakers?

No — active speakers (also called powered speakers) have built-in amplifiers and do not require external power amplifiers. Active speakers receive line-level signals directly from a mixing desk and amplify them internally. Passive speakers, on the other hand, require an external power amplifier to function. The choice between active and passive systems depends on your application: active speakers are simpler to set up and ideal for mobile use, while passive systems with external amplifiers offer greater flexibility, easier maintenance and often superior sound quality in large installations. If you already own passive loudspeakers, you will need a dedicated power amplifier to drive them.

What cable do I need to connect a power amplifier to loudspeakers?

Use professional speaker cable with a minimum cross-sectional area of 2.5 mm² for cable runs up to 10 metres, and 4 mm² or larger for longer distances. The cable should be terminated with Speakon connectors (NL4 or NL2) for professional PA systems, as these provide secure, locking connections rated for high current. Alternatively, use heavy-duty binding posts or banana plugs for installation speakers. Never use standard instrument cables or microphone cables to connect amplifiers to loudspeakers — they are not designed for high current and will cause power loss, overheating and poor damping factor. Always match cable gauge to amplifier power and cable length to ensure optimal performance.

Amplifiers

MONACOR PA-912S ELA-Mono-Leistungsverstärker, 120 W

MONACOR PA-912S Mono PA power amplifier

Mono PA power amplifier 1 x 120 W • Temperature-controlled fan, continuously adjustable • Protected against overheating, overload and short circuit • LED indication for clip,...

€320.00 *

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

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

MONACOR PA-924S ELA-Mono-Leistungsverstärker, 240 W

MONACOR PA-924S Mono PA power amplifier

Mono PA power amplifier 1 x 240 W • Temperature-controlled fan, continuously adjustable • Protected against overheating, overload and short circuit • LED indication for clip,...

€595.38 *

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

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

MONACOR PA-948S ELA-Mono-Leistungsverstärker, 480 W

MONACOR PA-948S Mono PA power amplifier

Mono PA power amplifier 1 x 480 W • Temperature-controlled fan, continuously adjustable • Protected against overheating, overload and short circuit • LED indication for clip,...

€712.00 *

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

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

OMNITRONIC CPE-60P PA Mixing Amplifier

PA mixing amplifier with audio player,IR remote control and Bluetooth, 60 W RMS SD card slot and USB port • FM tuner with auto scan • 3 microphone inputs with separate level controls...

€165.00 *

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

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

OMNITRONIC CPE-120P PA Mixing Amplifier

PA mixing amplifier with audio player,IR remote control and Bluetooth, 120 W RMS SD card slot and USB port • FM tuner with auto scan • 3 microphone inputs with separate level controls...

€191.43 *

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

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

OMNITRONIC CPZ-60P PA Mixing Amplifier

4-zone-PA mixing amplifier with audio player, IR remote control and Bluetooth, switchable zones, 60 W RMS 4 PA zone outputs, independently switchable on the front panel • Output for...

€169.00 *

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

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

Vonyx VDA500 PA Amplifier 1U 2x 250W

Vonyx latest amplifier design! The VDA-series are super compact stereo power amplifiers in a 1U rack-mountable housing. Silent operation and a low weight which make this series suitable for both...

Express delivery possible

€119.90 *

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

Vonyx VDA1000 PA Amplifier 1U 2x 500W

Vonyx latest amplifier design! The VDA-series are super compact stereo power amplifiers in a 1U rack-mountable housing. Silent operation and a low weight which make this series suitable for both...

Express delivery possible

€139.90 *

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

Express delivery possible

Availability:

Delivery time: 1-3 days

Delivery time: 1-3 days

Vonyx PA Amplifier VXA-800 II 2x 400W

A high standard 2x400W stereo amplifier using a more stable circuit with SMT technology standing for a high power output. With low noise level and wide frequency response. Excellent quality-price...

€179.00 *

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

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

Vonyx PA-Amplifier VXA-1200 II 2x 600W

A high standard 2x600W stereo amplifier using a more stable circuit with SMT technology standing for a high power output. With low noise level and wide frequency response. Excellent quality-price...

€199.00 *

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

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

Vonyx PA Amplifier VXA-1500 2x750W

A high standard 2x750W stereo amplifier using a more stable circuit with SMT technology standing for a high power output. With low noise level and wide frequency response. Excellent quality-price...

€229.00 *

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

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

Vonyx PA-Verstärker VXA-2000 II 2x 1000W

Vonyx PA Amplifier VXA-2000 II 2x 1000W

A high standard 2x1000W stereo amplifier using a more stable circuit with SMT technology standing for a high power output. With low noise level and wide frequency response. Excellent quality-price...

Express delivery possible

€259.00 *

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

Express delivery possible

Availability:

Delivery time: 1-3 days

Delivery time: 1-3 days

Vonyx PA Amplifier VXA-3000 2x 1500W

A high standard 2x1500W stereo amplifier using a more stable circuit with SMT technology standing for a high power output. With low noise level and wide frequency response. Excellent quality-price...

Express delivery possible

€289.00 *

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

Express delivery possible

Availability:

Delivery time: 1-3 days

Delivery time: 1-3 days

Vonyx VPA600 PA-Verstärker 2x 300W Media Player mit BT

Vonyx VPA600 PA Amplifier 2x 300W Media Player with BT

A series of amplifiers for semi-professional use. Modern technology ensures long-term top performance and connecting to and from this amplifier is a simple task! Like all of Vonyx amplifiers the...

€175.00 *

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

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

Vonyx VPA1000 PA-Verstärker 2x 500W Media Player mit BT

Vonyx VPA1000 PA Amplifier 2x 500W Media Player with BT

A series of amplifiers for semi-professional use. Modern technology ensures long-term top performance and connecting to and from this amplifier is a simple task! Like all of Vonyx amplifiers the...

€199.00 *

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

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

Vonyx VPA1500 PA-Verstärker 2x 750W Media Player mit BT

Vonyx VPA1500 PA Amplifier 2x 750W Media Player with BT

A series of amplifiers for semi-professional use. Modern technology ensures long-term top performance and connecting to and from this amplifier is a simple task! Like all of Vonyx amplifiers the...

€229.00 *

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

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

Power Dynamics PDV120MP3 PA-Mixer-Verstärker 120W/100V 4 Zonen

Power Dynamics PDV120MP3 PA Mixer Amplifier 120W/100V 4 zones

The PDV series is a range of fully featured, high power mixer amplifiers with 4 zone outputs, each with separate 6-step volume controls. This series amplifiers features an integral MP3 module with...

Express delivery possible

€379.00 *

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 PDV240MP3 PA-Mixer-Verstärker 240W/100V 4 Zonen

Power Dynamics PDV240MP3 PA Mixer Amplifier 240W/100V 4 zones

The PDV series is a range of fully featured, high power mixer amplifiers with 4 zone outputs, each with separate 6-step volume controls. This series amplifiers features an integral MP3 module with...

€429.00 *

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

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

Power Dynamics PDV360MP3 PA-Mixer-Verstärker 360W/100V 4 Zonen

Power Dynamics PDV360MP3 PA Mixer Amplifier 360W/100V 4 zones

The PDV series is a range of fully featured, high power mixer amplifiers with 4 zone outputs, each with separate 6-step volume controls. This series amplifiers features an integral MP3 module with...

€479.00 *

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

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

Power Dynamics PPA30 100V Mixer-Verstärker 30W

Power Dynamics PPA30 100V Mixer-Amplifier 30W

The PPA series is a series of 100V amplifiers with 8 ohms, 70V and 100V outputs characterized by easy use, excellent performance and reliability and is therefore particularly suitable for a wide...

€99.90 *

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

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

Power Dynamics PPA50 100V Mixer-Verstärker 50W

Power Dynamics PPA50 100V Mixer-Amplifier 50W

The PPA series is a series of 100V amplifiers with 8 ohms, 70V and 100V outputs characterized by easy use, excellent performance and reliability and is therefore particularly suitable for a wide...

€149.00 *

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

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

Power Dynamics PPA502 100V Mixer-Verstärker 50W 2 Zonen

Power Dynamics PPA502 100V Mixer-Amplifier 50W 2 Zones

The PPA502 is a 100V amplifier with 4/8 ohms, 70V and 100V outputs characterized by easy use, excellent performance and reliability and is therefore particularly suitable for a wide range of small...

€189.00 *

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

Availability:

Delivery time: 3-5 days

Delivery time: 3-5 days

Power Dynamics BT10 Kompakter BT-Stereo-Verstärker

Power Dynamics BT10 Compact BT Stereo Amplifier

The BT10 compact BT audio amplifier allows the most standard low impedance (8 ohm) speakers to be connected, perfect for ceiling and wall mountable speakers. The device can be linked to the most...

Express delivery possible

€29.90 *

incl. tax, plus shipping costs

Express delivery possible

Availability:

Delivery time: 1-3 days

Delivery time: 1-3 days

Power Dynamics BT20 Kompakt-BT-Verstärker

Power Dynamics BT20 Compact BT Amplifier

The BT20 is a modern designed mini stereo amplifier with built-in digital music player. The receiver is equipped with a state-of-the-art class-D digital amplifier and delivers 2x 30 Watts of RMS...

Express delivery possible

€57.00 *

incl. tax, plus shipping costs

Express delivery possible

Availability:

Delivery time: 1-3 days

Delivery time: 1-3 days