3. Car audio brands from Germany
  5. MA 4

MA 4

6 reviews

185 Watt

MA 4

6 reviews

Technical Highlights

  • Power: 4x105W at 4 ohms, 4x185W at 2 ohms, 2x368W bridged.
  • Damping factor at 4 ohms: >165, THD+N: 0.005% at 5 W 1 kHz.
  • Adjustable resistors 10/150/600 ohms, Voltage: 1-15V, 15-40V.
  • More technical details
€232.02
-22% €299.00 €232.02
2% discount with credit card

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ProductMA 4

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1 year extra warranty

Every product purchased from Masori includes an additional year of warranty in the third year after purchase (months 25–36). We cover repair or replacement free of charge for covered warranty claims. Automatic and free – exclusively for Masori customers. Your statutory rights remain unaffected.

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€232.02
€299.00 €232.02

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Compatible with MA 4

ETON MA 4 is a 4-Channel Amplifier with Advanced Class-D amplifier technology. The aluminum die-cast housing in matte Gunmetal Grey features a removable, 180-degree rotatable, machined aluminum top plate. Integrated are adjustable high-pass and low-pass filters with 12 dB/oct. The equipment includes Auto-Sense On function (SIG/DC), start-stop capability, and a switchable audio input signal for all channels. There are four high-level inputs and four low-level inputs (RCA) as well as an adjustable high-level input resistance and an adjustable high-level input signal voltage per channel pair. Detachable connection plugs, variable mounting feet, hidden mounting points and blind holes, stackable construction, status LED light bar, and integrated adjustment tool are available. Output power: 4 x 105 watts at 4 Ohm, 4 x 185 watts at 2 Ohm, 2 x 368 watts bridged at 4 Ohm. Dimensions: 184 x 160 x 51 mm. Engineered in Germany.

Features
  • 4-Channel Amplifier
  • Advanced Class-D amplifier technology
  • Aluminum die-cast housing in matte Gunmetal Grey
  • Removable, 180-degree rotatable, machined aluminum top plate
  • Adjustable 12 dB/oct. high-pass and 12 dB/oct. low-pass filters
  • Auto-Sense On function SIG/DC
  • Start-stop capable
  • 4 high-level inputs, 4 low-level inputs RCA
  • Switchable audio input signal for all channels
  • Detachable connection plugs for power and audio signal
  • Variable mounting feet
  • Hidden mounting thanks to additional mounting points and blind holes
  • Stackable construction
  • Status LED light bar
  • Integrated adjustment tool
  • Engineered in Germany
Technical Specifications
  • Power at 4 Ohm: 4 x 105 watts
  • Power at 2 Ohm: 4 x 185 watts
  • Power bridged at 4 Ohm: 2 x 368 watts
  • Signal-to-noise ratio: 83 dB
  • Damping factor at 4 Ohm: >165
  • THD+N: 0.005 % @ 5 W 1 kHz
  • High-pass active filter CH1/2 and CH3/4: 15 - 300 Hz and 300 Hz - 6 kHz
  • Low-pass active filter CH3/4: 15 - 300 Hz and 300 Hz - 6 kHz
  • High-level input resistance EPS load per channel pair: 10 / 150 / 600 Ohm
  • High-level input signal voltage per channel pair: 1 - 15 V and 15 - 40 V
  • Dimensions L x W x H: 184 x 160 x 51 mm

Frequently Asked Questions about MA 4

What power can the ETON MA 4 Amplifier deliver at 4 Ohm?

The ETON MA 4 Amplifier offers an output power of 4 x 105 Watts at 4 Ohm. This power is optimal for speakers that exhibit medium to high efficiency. The damping factor is over 165, indicating robust control over the speaker driver. Additionally, the signal-to-noise ratio of 83 dB ensures that the audio output remains clear and free from unwanted noise. Especially if you enjoy listening to music at high volumes, the low distortion of only 0.005% at 5 W and 1 kHz is particularly impressive. This ensures that the amplifier provides high sound fidelity at various volume levels.

How does the Auto-Sense On function work in the ETON MA 4 Amplifier?

The Auto-Sense On function of the ETON MA 4 Amplifier operates the amplifier in an automatic mode that turns on when an audio signal is present. This function is based on two detection methods: signal-based and DC-based triggering. When an audio signal is detected, the amplifier is automatically activated, increasing convenience as no separate turn-on signal is required. This is particularly practical in vehicles where there is no dedicated amplifier switch. The response to signal input also ensures that the amplifier remains off when no input signal is present, thus ensuring energy efficiency.

What filter options does the ETON MA 4 offer for sound?

The ETON MA 4 Amplifier is equipped with highly developed active filters that allow for precise sound tuning. The adjustable high-pass filters CH1/2 and CH3/4, as well as the low-pass filters on CH3/4, range from 15 to 300 Hz, and 300 Hz to 6 kHz, respectively. These filter settings allow for the elimination of disruptive frequencies and optimization of sound, especially in more complex audio setups. Users can thus precisely adjust the sound character of their music by emphasizing or suppressing specific frequency ranges. This flexibility is particularly useful when the speakers have different sound characteristics.

What input impedance matching options does the ETON MA 4 offer?

The ETON MA 4 Amplifier offers flexible adjustment of the high-level input impedance per channel pair, varying between 10, 150, and 600 Ohm. This adaptability ensures that the amplifier is optimally compatible with a wide range of signal sources and speakers. You can adjust the impedance to ensure the best possible signal transmission without losses. The set values are particularly important to optimize the interaction between the amplifier and the speaker, thus ensuring improved sound quality, even when different sources have varying signal levels.

How flexible is the installation of the ETON MA 4 in the car?

The ETON MA 4 Amplifier is designed for user-friendly and customized installation. With variable mounting feet, hidden mounting points, and additional blind holes, the dimensions of 184 x 160 x 51 mm fit ideally into most vehicle environments. Despite its compact size, the stackable design allows for efficient use of space. The connection plugs are detachable, making installation easier, especially in tight spaces where direct wiring would be cumbersome. Such flexibility supports seamless integration into complex car audio setups and significantly eases the work for experienced installers.

Can the ETON MA 4 deliver bridged power, and if so, how much?

Yes, the ETON MA 4 Amplifier can be operated in bridged mode, delivering a power output of 2 x 368 Watts at 4 Ohm. This bridged configuration is ideal for applications where higher power is needed for subwoofers or larger speakers. Bridging two channels significantly increases the amplification power without compromising sound quality. This feature is particularly useful when high volumes are required or when there is a need to process low-frequency bass signals more efficiently, which is often the case in performance-oriented car audio setups.

What input options does the ETON MA 4 Amplifier offer?

The ETON MA 4 Amplifier supports both high and low level inputs, with four high-level inputs and four low-level inputs (RCA) each. This versatility ensures that the amplifier can be connected to nearly any audio system, whether directly to speaker outputs or to a preamplifier output. This provides flexible connection options that also support complex audio configurations. The adjustable high-level input signal voltage per channel pair (1 - 15 V or 15 - 40 V) ensures that the signal transmission can be optimally adjusted to minimize distortion and maximize audio quality.

How is the input switching for audio channels implemented in the ETON MA 4?

The ETON MA 4 Amplifier offers a switchable audio input signal option that allows flexibility in signal distribution across the channels. Thanks to this feature, the inputs can be configured to handle individual or shared channel signals. This facilitates the adjustment of audio output to specific multichannel audio requirements. The customization can be done through the integrated control mechanisms, giving you the ability to optimally adjust the signal distribution to your setup. Especially if you like to use various audio profiles depending on the music genre, this flexibility offers clear advantages.

What are the dimensions of the ETON MA 4 and how do they affect installation?

The dimensions of the ETON MA 4 Amplifier are 184 x 160 x 51 mm, which represents a compact form factor that is highly advantageous for installation in vehicles. Due to its compact size, the amplifier can be more easily integrated into spatially constrained vehicle environments. The variable mounting with adjustable feet and hidden mounting points significantly simplifies installation. Even vehicles with limited space benefit from the small size, as the flexibility in placement does not impose significant restrictions, allowing for a visually and acoustically clean integration.

What advantages does the aluminum die-cast housing of the ETON MA 4 Amplifier offer?

The aluminum die-cast housing of the ETON MA 4 Amplifier in matte Gunmetal Grey offers several advantages. It ensures improved heat dissipation, which is essential for an amplifier of this power class. This prevents overheating and thus extends the lifespan of the internal components. Additionally, the housing provides the amplifier with high structural integrity, protecting the sensitive electronics. The removable, 180-degree rotatable aluminum top plate also allows for a custom look and easy accessibility, meeting both functional and aesthetic demands.

Manufacturer information/responsible person

ACR Brändli + Vögeli AG
Roland Brändli
Bohrturmweg 1
5330 Bad Zurzach
Switzerland

Responsible EU Person:
ACR S + V GmbH
Industriestr. 3
79787 Lauchringen
Germany

Contacts: compliance@acr.eu

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