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Power Amplifiers

Reference 210 monophonic tube stage: 210 W per channel (peak 240 W).

-€5,466.11

Power Amplifiers

AUDIO RESEARCH Reference 210T. EXDEMO

€16,575.21 €22,041.32

Reference 210 monophonic tube stage: 210 W per channel (peak 240 W). Ultra-wide response: 0.5 Hz - 240 kHz | THD: 0.5% at full power, <0.02% at 1 W Balanced input, outputs for 4, 8 and 16 Ω | Gain: 27 dB Damping factor: 14 | Noise: -106 dB | Max power consumption: 950 W Extremely high-definition sound, with dynamics, clarity and articulate bass...

-€5,166.66

Power Amplifiers

AUDIO RESEARCH Reference GS150. EXDEMO

Audio Research

€15,486.23 €20,652.89

Reference stereo tube stage with 8x KT150 and 6H30 (input). Power: 2x155 W over 4/8 ohms Fully balanced architecture Response: 0.5 Hz - 120 kHz | Slew rate: 13 V/µs | Climb: 2 µs Noise floor: -114 dB | Stored energy: 1.040 joules EXDEMO Product

-€3,966.95

Power Amplifiers

AUDIO RESEARCH Reference GSPRE. EXDEMO

Audio Research

€11,561.98 €15,528.93

Audio Research Reference GS150. Tube power amplifier. EXDEMO

AUDIO RESEARCH VTM 200. Monophonic power amplifier

On sale!
-€11,652.89

Power Amplifiers

AUDIO RESEARCH VTM 200. USED

Audio Research

€4,049.59 €15,702.48

AUDIO RESEARCH VTM 200. Monophonic power amplifier USED product

-€1,322.31

Power Amplifiers

ELECTROCOMPANIET AW250-R. Refurbished

Electrocompaniet

5044000007

€5,288.43 €6,610.74

Stereo reference power stage. Monophonic and balanced double circuit topology Executed with audiophile grade components Balanced and unbalanced inputs and outputs

Rogue Audio Apollo. Monobloc power amplifier

-€7,355.37

Power Amplifiers

ROGUE AUDIO Apollo Reference Monoblocs. USED

Rogue Audio

2313300005

€4,958.68 €12,314.05

Monobloc power amplifier. Monoblock design for perfect channel separation Oversized power supply Ultra-high performance transformers Integrated bias meter All precision components 6 x KT90 , 2 x 12AU7 , 1 x 12AX7 valves per channel USED Product

ANTHEM MDX 16

Very high performance 16-channel power amplifier.

-€826.45

Multi-channel AV stages

ANTHEM MDX 16. Refurbished

Anthem

€2,478.51 €3,304.96

Refurbished product. Very high performance 16-channel power amplifier. Power rating 16x60 W at 8 ohms.

-€4,019.83
New

Power Amplifiers

ICON AUDIO MB 805. USED

Icon Audio

€3,305.79 €7,325.62

Monophonic tube power amplifier. 1 x 50W. Valve output: 1 X 805 (EACH CHANNEL) Price per pair Used product (Overhauled and in good working order)

MCINTOSH MC 2205. Power amplifier on offer Audiohum

On sale!
New

Power Amplifiers

MCINTOSH MC 2205. USED

McIntosh

€2,727.27

2-channel solid state power amplifier. USED Product

There are no products.

A power amplifier is a Hi-Fi electronic device that receives a low-level electrical signal from a preamplifier and amplifies it to deliver a power large enough to drive a pair of speakers at the required volume and quality.

Contact us to choose the best power amplifier for your sound system.

Guide to Buying a Power Amplifier

What is a Power Amplifier?

A power amplifier is an audio amplifier designed to increase the level of a signal by intensifying the input signal. This is achieved using bias currents in the output transistor. They operate with direct current and usually have an internal cooling system.

History of Power Amplifiers

The origin of power amplifiers dates back to 1912 when Lee de Forest invented the vacuum tube triode, a three-terminal device that revolutionized audio amplification and enabled the development of AM radio. By the late 1960s, transistor-based amplifiers became popular due to their lower cost and greater accessibility.

During the 1970s, solid-state amplifiers, such as those based on BJT and MOSFET technology, became the norm due to their lower weight, reduced technical issues, and lower maintenance requirements compared to tube amplifiers. In 1974, Jun-Ichi in Japan improved the MOSFET design, leading to the creation of LDMOS in 1977, which was used in public address and music systems. Finally, in the 1980s, Class D amplifiers emerged, optimizing the efficiency of power stages.

Today, despite technological advancements, tube amplifiers remain appreciated by audiophiles and sound professionals due to their warm audio quality.

Types of Power Amplifiers

There are various types of power amplifiers, each with specific characteristics:

Class A: The output current flows through a single transistor, resulting in high fidelity but lower efficiency and greater heat generation.

Class B: Operates with two half-cycles; one transistor amplifies one half-cycle, while another handles the second. It is more efficient than Class A but may introduce signal distortion.

Class AB: Similar to Class B but with a small common current in both half-cycles to reduce distortion.

Class C: Its output covers less than half a cycle, using a circuit of capacitors and coils to compensate for the signal. It is highly efficient but generates significant distortion, making it suitable for radio frequency applications.

Class D: Uses modulation to operate in saturation and cutoff mode, reducing energy loss and improving efficiency.

Class G: Incorporates multiple voltage lines that activate according to demand, optimizing power consumption.

BJT and MOSFET: Transistor-based technologies. BJTs were the first to emerge, while MOSFETs offer greater efficiency and lower heat generation.

What to Consider When Buying a Power Amplifier?

When choosing a power amplifier, it is important to consider the following factors:

Output Power: Measured in watts (W), it must be compatible with the speakers and sound system.

Impedance: It should match the speaker impedance to avoid efficiency losses or equipment damage.

Amplification Type: Depending on the use, Class A (high fidelity), Class D (efficiency), or Class AB (a balance between both) may be preferable.

Connectivity: Check the input and output connections to ensure compatibility with other equipment.

Cooling System: Some power amplifiers generate significant heat, so it is important to consider the ventilation system.

Intended Use: Needs may vary depending on whether it is for professional use (concerts, public address) or domestic use (home theater, recording studio).

Buying the right power amplifier depends on the intended use, required power, and the type of amplification that best suits the user's needs. By understanding the different types and their characteristics, an informed decision can be made to ensure optimal performance and sound quality.

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