Helix M Four DSP amplifier

Name: Helix M Four DSP amplifier
Brand: Helix
Price: 641.40 EUR
Availability: InStock
Rating: 5.0000 (1 reviews)

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4-channel amplifier with DSP processor, 4 x 100 / 2 x 200 W RMS (4 Ω)
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Helix M Four DSP Amplifier with DSP Processor

Helix M Four DSP is not "just" another four-channel amplifier – despite its compact dimensions it represents a powerful control center with a total of ten fully processable DSP channels. In addition, the amplifier delivers a generous 100 W RMS output power per channel into 4 and 2 ohms. An amazing price-performance ratio combined with a fantastic feature set.

Absolutely Helix sound!

Compromises in sound quality have no place at HELIX – which is why the M FOUR DSP is equipped with all the refinements for perfect sound. High-quality and separate A/D and D/A converters, an extremely powerful DSP from Analog Devices, and the fact that the DSP circuit board is fully manufactured in Germany are a given. In addition, six preamplifier outputs with a 6 V output voltage provide more than enough level to drive any additional amplifier.

Maximum flexibility

Even the internal section of the M FOUR DSP amplifier is extremely versatile – it can be operated either in 4-channel mode or, thanks to its bridging capability, configured as a 3-channel or even 2-channel amplifier. But that’s not all – together with the six preamp outputs, the sound system can be expanded in various ways and upgraded up to 10 channels. In combination with other M-series amplifiers (M ONE X, M FOUR or M SIX) there are more than enough options to extend the number of power channels. This enables complex, yet cost-effective and above all space-saving multi-channel systems with enormous power.

Virtual Channel Processing – this is how signal routing works today

Many DSP channels require precise management and configuration – which is why the M FOUR DSP is also equipped with Audiotec Fischer’s innovative Virtual Channel Processing. Adapting to modern OE sound systems through an increasing number of inputs has a significant impact on the complexity of signal routing inside the amplifier. Especially when several input signals are mixed together and then redistributed into multi-way systems, conventional routing concepts quickly reach their limits in terms of both implementation and usability. Audiotec Fischer’s new multi-stage “Virtual Channel Processing” together with the established, user-friendly DSP PC-Tool software makes it easier to realize even very complex system configurations. In addition, it allows freely assigning proprietary sound FX functions such as “RealCenter” or “Augmented Bass Processing.”

Plus in speed – thanks to ACO

Faster is better – the particularly powerful 32-bit ACO platform takes over all control tasks and ensures significantly higher speed, especially for data communication with the DSP PC-Tool software, but also for lightning-fast switching between up to ten sound presets. ACO offers much more – fantastic sound effects such as Augmented Bass Processing or RealCenter are implemented, as well as channel-separated Input EQ, including Input Signal Analyzer (ISA) for easy analysis and compensation of OE radio input signals that already include factory sound settings.

Compact, cool and absolutely practical

Despite the wide range of features and huge output power, the M FOUR DSP presents itself in the same classic, compact HELIX design with characteristic lines as the HELIX M FOUR or M ONE. Thanks to Class D amplifier technology, it keeps a “cool head” even at full power. With features such as start-stop capability, the ADEP.3 circuit and an energy-saving mode, it is also ideally equipped for the everyday challenges of OEM integration.

Main features

Up to 135 W RMS max. output power per channel into 4 and 2 Ω.
Extremely powerful 64-bit fixed-point audio DSP and state-of-the-art 32-bit A/D and D/A converters from AKM.
ACO – advanced 32-bit CoProcessor platform for enhanced system and DSP functions.
ISA (Input Signal Analyzer) and InputEQ for easy analysis and compensation of input signals.
Sound effects SFX – Augmented Bass Processing, StageXpander, RealCenter & Co.
Intelligent 6-channel high-level input with ADEP.3 circuit.
Six RCA / Cinch line outputs with a max. output voltage of 6 V.
Virtual Channel Processing (VCP) enables even more flexible configuration for highly complex sound systems.
Bridgable amplifier channels for driving a powerful subwoofer.
DSP board manufactured in Germany.

About the brand

HELIX by Audiotec Fischer is a German brand of premium car audio equipment that has been among the world leaders in amplifiers and DSP processors for more than 35 years. HELIX is considered a leader in digital signal processors, offering some of the most advanced and highest-quality DSP processors in the world, enabling an experienced technician to tune any audio system to perfection and bring an authentic hi-fi experience into the car. The combination of precise German engineering, state-of-the-art technologies and innovative design delivers a clean, dynamic and detailed sound that has won the favor of audiophiles worldwide. HELIX products are characterized by high efficiency, reliability and perfect integration into modern vehicles. They are the ideal choice for demanding users who require the best possible sound without compromise. Helix, together with the brands Brax and Match, is part of the German manufacturer Audiotec Fischer.

Catalog number	HA14117
Brand	Helix
Links	Official web presentation
Number of amplifier channelsAmplifiers are divided into: - Monoblocks - 2-channel - 3-channel - 4-channel - 5-channel - 6-channel - multi-channel Each channel is used to power one speaker for the coaxial type, or one side if they are component speakers. Monoblock type amplifiers are mainly used for subwoofers. 2-channel are suitable for both subwoofers and, for example, the front pair of speakers in a car. 3-channel is used for front or rear speakers + subwoofer. 4-channel are used for front + rear speakers or 1 pair of speakers + subwoofer. 6 or 5-channel are used for 2 pairs of speakers + subwoofer, most often. Bridging means connecting the amplifier to a bridge, using the + pole from one channel and the - pole from the other channel. In most cases this is shown as "BRIDGED" on the amplifier.	4
Energy class of the amplifierAmplifiers are divided into two basic classes: analog and digital . Analog amplifiers (A/B) have higher consumption requirements, but usually have a more natural sound. Digital amplifiers (D) have significantly lower consumption and higher efficiency, but the sound may not be as faithful as with classic analog amplifiers.	D
RMS power into 4 ΩRMS power when loading speakers or subwoofer at 4 Ω. RMS power is the constant power of the amplifier and is one of the most important parameters when choosing an amplifier.	4 x 100 / 2 x 200 W
RMS power into 2 ΩRMS power when loading speakers or subwoofer at 2 Ω. RMS power is the constant power of the amplifier and is one of the most important parameters when choosing an amplifier.	4 x 100W
Inputs	6 x RCA, 6 x Hi-evel, 1 x optical SPDIF
Outputs	6 x RCA, 4 x Hi-level
Integrated DSP processor	Yes
Number of DSP processor channels	10
Frequency rangeThe ability of the amplifier to reproduce the signal from the lowest frequency to the highest = faithfully reproduce the sound in a specific frequency band. Professionally: In the frequency range from 40 to 16,000 Hz, the vast majority of fundamental and overtones (harmonics) of all musical instruments are found. We are interested in the course of the radiated sound pressure in this range of frequencies when the loudspeaker system is supplied with constant power. We call this course the frequency characteristic, which tells us the level of radiated sound pressure in decibels (dB) depending on the frequency. The frequency characteristic of a speaker or speaker system can be expressed most succinctly with a graph. Mostly, however, the frequency characteristic is indicated by indicating the maximum tolerance of the sound pressure in the given frequency range, e.g. 50 to 15,000 Hz -+ 6 dB. Since the frequency characteristics of loudspeakers and systems in general are quite uneven, some manufacturers do not even specify this maximum tolerance of sound pressure in decibels in their catalogs for reasons of prestige. Data impoverished in this way is unfortunately worthless. What is valid is that the manufacturer offers a speaker system with a frequency range of 30 to 20,000 Hz, if he is worried about stating the maximum unevenness of the sound pressure in this range, because he can have a tolerance of, for example, +- 20 dB. The unevenness or undulation of the frequency curve in good speaker systems for high-quality music performance should not exceed +-3 dB in the 80 to 12,000 Hz band and +-6 dB in the 40 to 16,000 Hz band. Greater unevenness already depletes or emphasizes certain tonal areas, which can cause audible or even disturbing distortion. The proportion between fundamental tones and higher harmonics also changes, thereby changing the color of the sound, and individual musical instruments as well as the entire musical image sound unnatural.	20 - 22000 Hz
Harmonic Distortion (THD)Total harmonic distortion indicates how much the input signal is distorted in the amplifier. Distortions appear as overtones contained in the output signal. The proportion of originally absent parts of the signal is given as a percentage, typical values are between 0.001% and 0.5%. Distortion is measured in their power band. If it exceeds the limit of 0.7% from a certain power, it is the value of the output power of the given amplifier, from which it no longer plays without distortion and from which the distortion usually increases steeply, so that no further increase in power can be counted on. The lower the value, the better.	< 0.03%
Signal-to-noise ratioThe signal-to-noise ratio means that the output signal always contains noise. The signal-to-noise ratio expresses how much of this noise is compared to the useful signal. The so-called A value is given, which does not take deep and very high frequencies into account. This corresponds to the characteristic of human hearing, which is not so sensitive to deep frequencies, especially below 1 kHz. The higher the value, the better the amplifier is.	105 dB
Damping factorDF - Damping Factor . It is the ratio of the load (repro + cables, crossover, etc.) to the internal resistance of the amplifier. The bigger the DF, the more controlled the bass. Amplifiers with a lower DF tend to hum. Subwoofers with a higher Q in the bass reflex and sometimes in the enclosure will also cause humming.	100
High level inputsThe high-level input on the amplifier allows connection directly to the existing speakers in the car without additional purchase of an external high/low adapter. Important equipment in the case of installing an amplifier on an original car radio.	Yes
Automatic on and offThis function allows you to automatically switch on the amplifier.	Yes
Socket input terminalsFerrule terminals allow better wiring contact to the amplifier. It is also a more secure form of terminals. If you are tightening the sleeve terminals, we recommend retightening them after 1 day, as the connected cable gradually compresses.	Yes
Remote control included in the packageSome models of amplifiers also come with wired remote controls in the package, which on one side plug into the amplifier and on the other side you have a potentiometer that you can place anywhere in the cabin. A common place to place the remote control is under the steering wheel. The advantage is the regulation of power, and therefore volume, depending on driving conditions and the mood of the crew in the car.	No
Input for wired remote controlIf the amplifier has a remote control input.	Yes
The value of the fuses on the amplifierFrom the value of the fuses on the amplifier, you can get a true picture of the real performance of the amplifier.	2 x 30A
Dimensions of the amplifier	50 x 230 x 154 mm