Active subwoofer ESB Audio HR 11 SW
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Active spare-wheel subwoofer ESB Audio HR 11 SW
ESB Audio presents the active subwoofer HR 11 SW from the new entry-level Harmony series, which offers products with above-standard sound, exemplary workmanship and unobtrusive installation in the vehicle interior. At ESB they focused primarily on acoustic quality and reliability so that even the basic Harmony line adheres to the high standards of this Italian manufacturer. HR 11 SW is an active subwoofer that comfortably fits into the rim of your spare wheel. The resulting installation is therefore completely hidden, yet the subwoofer delivers fantastic dynamics to your sound system. HR 11 SW provides powerful and dynamic sound thanks to an 11" driver with a dual voice coil and a class D amplifier with 200 W RMS output. The die-cast aluminium chassis makes the subwoofer robust, durable and long-lasting. Using the supplied remote control you can set the volume level, change the input phase (non-inverted or inverted), adjust the crossover frequency from 50 to 150 Hz and boost the bass by up to 12 dB. A high-level input for easy integration with factory systems is of course included, and you can rely on the subwoofer's automatic on/off function.
Harmony series
The Italian brand Harmony was born in the 1980s together with the first home speakers produced by the Italian hi-end manufacturer ESB Audio. Production of car speakers began in the 1990s with a wide range of products that combined high sound quality and significantly lower prices than ESB Audio products. That was also Harmony's main mission - to provide a high standard of sound quality with faithful reproduction of the entire audio spectrum, superior workmanship and all at a more accessible price. The same applies today, when ESB Audio decided to create a new product line Harmony Blue Note and Hard Rock. And why Blue Note? With this term ESB Audio recalls the Blue Note Jazz era from the 1930s to the 1950s. It's a way to connect product names with important moments in modern music history. Products labeled "Blue Note" are characterized by high-quality, uncolored sound for undisturbed listening across all music genres. Within the Harmony series you will also find "Hard Rock" products with a different tuning, richer and deeper bass and higher power. The Harmony series will gradually offer a wide range of products aimed at providing a complete range of audio devices to meet the needs of the widest group of music enthusiasts.
About ESB Audio
The history of ESB Audio dates back to 1972 when this Italian brand was officially founded. ESB Audio is among the most famous loudspeaker manufacturers of the second half of the 20th century and during its rich history it launched many innovative technologies and numerous high-end home audio products that achieved huge worldwide success. Based on the experience gained, in 1984 ESB engineers began research focused on optimizing sound in the automotive environment and two years later started producing the first car speakers. Thanks to great success ESB increasingly focused on the automotive industry and its demanding challenges. Car audio began to be a phenomenon of the time and in 2005 a school dedicated exclusively to vehicle sound systems was founded in Aprilia, where ESB is headquartered. At that time the definitive decision was made to leave the world of home audio and devote themselves exclusively to vehicle sound. Today ESB, together with the American maker of audiophile amplifiers and DSP processors Zapco, falls under the Italian company Apex Group. The lineup includes several series of speakers led by the super high-end three-way system Diecimila, which probably represents the highest-quality and most expensive car speakers on the market today. And that is also ESB Audio's main mission: to manufacture speakers of the highest quality focused on faithful sound that allows the user to experience reproduction as the performer intended during creation. Exactly according to the company's slogan "Just like live".
| Catalog number | ESB HR 11 SW |
| Brand | ESB Audio |
| Links | Official web presentation |
| The diameter of the subwoofer usedThe diameter of the subwoofer that is installed in the active box. | 11" (280 mm) |
| 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. | 200 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. | 400 W |
| RMS power of the amplifier | 200 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. | D |
| 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. | 30 - 160 Hz |
| Low-pass filter (LPF) | 50 - 150 Hz |
| Bass boost functionBass boost or bass enhancement. With this function, the bass itself can be emphasized, at a high level of bass boost, the speakers and the subwoofer can distort a lot and the sound will be worse than better. We therefore recommend using the "bass boost" function wisely. | 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. | Yes |
| 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 |
| Cabling included in the packageSome active subwoofers have complete wiring included in the package. In the event that the package really includes complete wiring for connection, we mark the parameter as "yes". If the wiring is not included, it must be purchased. | No |
| 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 |
| What is the baffle made of?Active subwoofers can be made of MDF board, hardened plastic, sheet metal, aluminum or a combination of different materials. | Aluminum |
| Active subwoofer dimensions | 360 x 360 x 126 mm |
