Subwoofer Helix U 10A

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active subwoofer, Ø 10", 180 W RMS
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Subwoofer Helix U 10A

If the installation space in the vehicle is scarce and the existing car hifi systems absolutely need to "kick up" in the low frequency range without much effort, the new active subwoofers HELIX U 10A and U 8A are the right choice. Powered by powerful 180W RMS class AB integrated amplifiers with solid aluminum cones and heat-resistant voice coils, the robust drivers easily transform the amp's power into impressive bass. Thanks to comprehensive adjustment options such as an adjustable low-pass filter and particularly sensitive phase control, the reproduction of low frequencies can be perfectly adapted to the acoustic conditions inside the vehicle. Equipped with 2-channel high-level input with auto-on function and 2-channel low-level RCA input ensures seamless integration. And the particularly shallow chassis design will make installation easy, especially if space is extremely limited. These small "bass boosters" fit under the seats, for example.

The main features of the Helix U 10A subwoofer

Active subwoofer in a flat design.
Powerful Class AB integrated amplifier with 180 W RMS power for powerful bass.
Solid aluminum enclosure with low resonance for accurate bass reproduction and optimal heat dissipation.
Subwoofer with a diameter of 250 mm with an extremely stable aluminum membrane.
2-channel high-level input with auto-on function and 2-channel low-level input.
Continuously adjustable low-pass filter.
Particularly sensitive phase adjustment.
A wired remote control for volume adjustment is included in the package.
Specially flat chassis design - ideal for space-saving mounting under the seat.

Catalog number	U 10A
Links	Official web presentation
RMS power of the subwooferThe RMS power of an active subwoofer is the constant power that the active subwoofer can play over a long period of time. We recommend following this value. The RMS power of active subwoofers is taken as the RMS power of the integrated amplifier, which in most cases is slightly undersized, which guarantees protection against subwoofer burning.	180 W
Maximum subwoofer performancePeak performance or Max. power that an active subwoofer can play for a moment (approx. 0.5 s), for example when percussion instruments are struck in a recording. But it is not as important a parameter as the RMS power.	360 W
RMS power of the amplifier	180 W
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.	AB
The diameter of the subwoofer usedThe diameter of the subwoofer that is installed in the active box.	10" (250mm)
Frequency rangeThe ability of the device to reproduce a signal from the lowest frequency to the highest, or the ability of an active subwoofer to faithfully reproduce 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 for reasons of prestige. Data impoverished in this way is 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, i.e. the undulation of the frequency course in good speaker systems for 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.	40 - 150 Hz
Low-pass filter (LPF)	50 - 150 Hz
High level inputThe high-level input on the active subwoofer enables connection directly to the speakers in the car without purchasing an external high/low converter. Use in the case of mounting an active subwoofer on the original car radio.	Yes
Automatic on and offThis function will facilitate your installation and solve the problem of finding a remote signal, which is sometimes a problem with original car radios. The active subwoofer with the Auto sense function can recognize that the equipment in the car is active and turn itself on. A useful and practical feature.	Yes
Phase rotation optionPhase shift is a linear electronic oscillator that produces a sinusoidal output. It consists of an inverting part of the amplifier such as a transistor. The feedback network "shifts" the phase at the output of the amplifier by 180 degrees to the oscillation frequency and gives positive feedback. The Phase shift filter produces a phase shift that increases with increasing frequency. This is usually used when the subwoofer sub-assembly is out with the magnet, or when two amplifiers are connected externally. Phase Shift is also used with active speaker wiring, where the time shift of the speakers is set. The point is that the subwoofer does not play the bass late, and for this reason better amplifiers offer this phase reversal option.	0 - 180°
Remote control included in the packageSome models of active subwoofers also have wired remote controls in the package, which on the one hand connect to the active box, and on the other hand 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.	Yes
Active subwoofer dimensions	78 x 245 x 345 mm