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Sonus Faber GRAVIS I

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Description

Description of Freakuence!
The smallest subwoofer in the series. A cute little box. But it packs a punch? The Gravis I surprises you when it opens up; it doesn’t roar, but builds subtlety rather than noise. It blends into your stereo system so seamlessly that you wonder if it’s even there… until you turn it off; then you miss the depth.
General description
The Sonus Faber GRAVIS I is an active subwoofer that adds deep bass to your audio system without overwhelming the rest of the soundstage. This Sonus Faber GRAVIS I subwoofer enriches the sound of your setup with a powerful and controlled reproduction of low frequencies, providing a solid foundation, a refined stereo image, and clearer detail in musical and cinematic passages. The GRAVIS I combines dynamics and nuance in a single component, with bass that is tightly controlled yet remains full and expressive.
The Sonus Faber GRAVIS I subwoofer stands out because it integrates seamlessly with bookshelf or floor-standing speakers without disrupting the balance between the midrange and bass. In listening rooms, the GRAVIS I truly shines when you’re looking for a richer percussion experience, a seamless transition between speakers and the subwoofer, and improved bass reproduction without rumbling or distortion. The sound remains natural, with enough detail to make even subtle nuances audible—vocal lines, strings, or electronic bass notes become more palpable without fading into the background.
If you’re considering the Sonus Faber GRAVIS I, we invite you to schedule a listening session and experience how this model can enhance your audio system. Would you like to compare the Sonus Faber GRAVIS I with other subwoofers or discuss a trade-in to help you make the best choice? Feel free to contact us!
Sonus Faber GRAVIS I Specifications
System: Sealed-box, down-firing active subwoofer Loudspeaker: 1 × 210 mm long-throw woofer, treated paper cone, wide rubber surround Amplifier: High-linearity Class AB Power Output: 150 W nominal; 250 W peak Frequency Response: −6 dB from 30 Hz to Fc (user-adjustable) Crossover Frequency: Continuously adjustable 30–120 Hz; slope 24 dB/octave Controls: Independent Master and LFE volume; signal phase inversion switch (0/180°); auto on/off (can be disabled) Inputs: LFE mono RCA; Line-level mono RCA; High-level Neutrik 4-pole Speakon Mains Voltage: Factory-selected, 120 VAC – 60 Hz or 230 VAC – 50 Hz Fuse: T4.0A at 110 VAC; T2.0A at 230 Vac Power Consumption: 0.5 W in standby; 200 W rated power Dimensions (HxWxD): 334 × 286 × 316 mm (including feet) Weight: 14.5 kg
Background Information
Sonus Faber’s GRAVIS I was designed with a focus on elegance and performance. The subwoofer, developed by the Sonus Faber team, utilizes high-quality components and materials to deliver a rich bass experience. The enclosure is crafted from durable woods, carefully selected for their acoustic properties. Internal wiring and electronics are of the highest quality to ensure signal purity. The design exudes Italian craftsmanship, which is characteristic of Sonus Faber’s approach to audio equipment.
Brand History
Sonus faber was founded in 1983 in Vicenza, Italy. The company was founded by Franco Serblin, with a focus on developing high-quality speakers. The name Sonus faber means “maker of sound,” referring to the artisanal nature of their products. The brand is known for its meticulous craftsmanship and attention to detail, combining materials such as wood and leather. Sonus faber stays true to its Italian heritage and maintains a manufacturing process that emphasizes craftsmanship and aesthetics. The brand has received worldwide recognition for its loudspeakers.

Additional information

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Questions & Answers

How do you determine the correct crossover frequency for the GRAVIS I?

You adjust the crossover using the knob on the back; set it between 30 and 120 Hz depending on the bass performance of the main speakers.

How does the phase inversion switch (0°/180°) on the GRAVIS I work?

The switch reverses the signal polarity to optimize bass integration with the main speakers in the listening room.

Does the GRAVIS I have an automatic standby mode or a switch to turn the device off when there is no signal?

Yes, there is an “Auto switch” that automatically turns the device on or off depending on whether an input signal is present.

What input options are available for signal connectivity on the GRAVIS I?

There are three inputs: LFE (mono RCA), LINE (mono RCA), and HIGH-LEVEL via a 4-pin Neutrik Speakon connector.

Is the GRAVIS I compatible with stereo amplifiers that don’t have a subwoofer output?

Yes, the signal from the amplifier’s speaker outputs can be used via the HIGH-LEVEL input (Speakon).

How powerful is the amplifier in the GRAVIS I?

The amplifier delivers 150 W RMS and a peak power of 250 W.

What is the frequency response of the GRAVIS I?

The frequency response ranges from approximately 30 Hz (-6 dB) to the set crossover frequency.

How large is the woofer driver, and what type of enclosure does it use in the GRAVIS I?

It features a 210 mm long-throw driver in a sealed enclosure with a downward-firing design.

Can the GRAVIS I be used with speakers from other brands?

Yes, the adjustable crossover, phase switch, and volume control allow for integration with speakers from other brands.

What power supply and safety features come standard on the GRAVIS I?

It comes with a factory-selected line voltage (120 V/60 Hz or 230 V/50 Hz) and includes a matching fuse (T4.0A for 110 V and T2.0A for 230 V).
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Features

i

We are an official dealer and can supply all other products and models. We can often also order items from many other manufacturers for the shop. Feel free to ask! We accept trade-ins for both new and used items.

Dealership

i

The subwoofer provides support, ensuring that the midrange and high frequencies reach you with more impact, grandeur, and emotion. The midrange and high frequencies are carried by the low frequencies. When watching movies, it adds that extra dimension that most people simply can’t do without. A good subwoofer doesn’t vibrate itself, but simply sets the surrounding air in motion, resulting in a tight, undulating movement. Wonderful!

Subwoofer

All about | Sonus Faber GRAVIS I

Description of Freakuence! | Sonus Faber GRAVIS I

The smallest subwoofer in the series. A cute little box. But it packs a punch? The Gravis I surprises you when it opens up; it doesn’t roar, but builds subtlety rather than noise. It blends into your stereo system so seamlessly that you wonder if it’s even there... until you turn it off; then you miss the depth.

General description | Sonus Faber GRAVIS I

The Sonus Faber GRAVIS I is an active subwoofer that adds deep bass to your audio system without overwhelming the rest of the soundstage. This Sonus Faber GRAVIS I subwoofer enriches the sound of your setup with a powerful and controlled reproduction of low frequencies, providing a solid foundation, a refined stereo image, and clearer detail in musical and cinematic passages. The GRAVIS I combines dynamics and nuance in a single component, with bass that is tightly controlled yet remains full and expressive.
The Sonus Faber GRAVIS I subwoofer stands out because it integrates seamlessly with bookshelf or floor-standing speakers without disrupting the balance between the midrange and bass. In listening rooms, the GRAVIS I truly shines when you’re looking for a richer percussion experience, a seamless transition between speakers and the subwoofer, and improved bass reproduction without rumbling or distortion. The sound remains natural, with enough detail to make even subtle nuances audible—vocal lines, strings, or electronic bass notes become more palpable without fading into the background.
If you’re considering the Sonus Faber GRAVIS I, we invite you to schedule a listening session and experience how this model can enhance your audio system. Would you like to compare the Sonus Faber GRAVIS I with other subwoofers or discuss a trade-in to help you make the best choice? Feel free to contact us!

Sonus Faber GRAVIS I Specifications | Sonus Faber GRAVIS I

System: Sealed-box, down-firing active subwoofer Loudspeaker: 1 × 210 mm long-throw woofer, treated paper cone, wide rubber surround Amplifier: High-linearity Class AB Power Output: 150 W nominal; 250 W peak Frequency Response: −6 dB from 30 Hz to Fc (user-adjustable) Crossover Frequency: Continuously adjustable 30–120 Hz; slope 24 dB/octave Controls: Independent Master and LFE volume; signal phase inversion switch (0/180°); auto on/off (can be disabled) Inputs: LFE mono RCA; Line-level mono RCA; High-level Neutrik 4-pole Speakon Mains Voltage: Factory-selected, 120 VAC – 60 Hz or 230 VAC – 50 Hz Fuse: T4.0A at 110 VAC; T2.0A at 230 Vac Power Consumption: 0.5 W in standby; 200 W rated power Dimensions (HxWxD): 334 × 286 × 316 mm (including feet) Weight: 14.5 kg

Background Information | Sonus Faber GRAVIS I

Sonus Faber’s GRAVIS I was designed with a focus on elegance and performance. The subwoofer, developed by the Sonus Faber team, utilizes high-quality components and materials to deliver a rich bass experience. The enclosure is crafted from durable woods, carefully selected for their acoustic properties. Internal wiring and electronics are of the highest quality to ensure signal purity. The design exudes Italian craftsmanship, which is characteristic of Sonus Faber’s approach to audio equipment.

Brand History | Sonus Faber GRAVIS I

Sonus faber was founded in 1983 in Vicenza, Italy. The company was founded by Franco Serblin, with a focus on developing high-quality speakers. The name Sonus faber means "maker of sound," referring to the artisanal nature of their products. The brand is known for its meticulous craftsmanship and attention to detail, combining materials such as wood and leather. Sonus faber stays true to its Italian heritage and maintains a manufacturing process that emphasizes craftsmanship and aesthetics. The brand has received worldwide recognition for its loudspeakers.

Questions & Answers | Sonus Faber GRAVIS I

How do you determine the correct crossover frequency for the GRAVIS I?


You adjust the crossover using the knob on the back; set it between 30 and 120 Hz depending on the bass performance of the main speakers.

How does the phase inversion switch (0°/180°) on the GRAVIS I work?


The switch reverses the signal polarity to optimize bass integration with the main speakers in the listening room.

Does the GRAVIS I have an automatic standby mode or a switch to turn the device off when there is no signal?


Yes, there is an “Auto switch” that automatically turns the device on or off depending on whether an input signal is present.

What input options are available for signal connectivity on the GRAVIS I?


There are three inputs: LFE (mono RCA), LINE (mono RCA), and HIGH-LEVEL via a 4-pin Neutrik Speakon connector.

Is the GRAVIS I compatible with stereo amplifiers that don’t have a subwoofer output?


Yes, the signal from the amplifier’s speaker outputs can be used via the HIGH-LEVEL input (Speakon).

How powerful is the amplifier in the GRAVIS I?


The amplifier delivers 150 W RMS and a peak power of 250 W.

What is the frequency response of the GRAVIS I?


The frequency response ranges from approximately 30 Hz (-6 dB) to the set crossover frequency.

How large is the woofer driver, and what type of enclosure does it use in the GRAVIS I?


It features a 210 mm long-throw driver in a sealed enclosure with a downward-firing design.

Can the GRAVIS I be used with speakers from other brands?


Yes, the adjustable crossover, phase switch, and volume control allow for integration with speakers from other brands.

What power supply and safety features come standard on the GRAVIS I?


It comes with a factory-selected line voltage (120 V/60 Hz or 230 V/50 Hz) and includes a matching fuse (T4.0A for 110 V and T2.0A for 230 V).

Reviews & awards | Sonus Faber GRAVIS I

Audiodrom

: An in-depth review shows that the Gravis I is ideal for stereo sound. The enclosure is sealed; it features a single active driver, a down-firing driver, a Class AB amplifier (150 W continuous, 250 W peak), and a high-level input via Speakon. In small to medium-sized rooms, it delivers tight, fast, and musical bass—without excess—and integrates well with main speakers. However, in larger rooms or when heavy movie bass frequencies are required, it falls a bit short.

FWD.nl

: According to the Sonetto series review, the Gravis I is “a compact subwoofer with plenty of punch.” The sealed-box design, the floor-facing driver, and the solid walnut finish are praised. It performs remarkably well in its price range, is suitable for smaller rooms, and pairs easily with bookshelf speakers thanks to its LFE and high-level connections.

Son-Vidéo (France)

: This review reveals that the Gravis I delivers a “deep, rich, and well-defined” bass with excellent control in the lower frequency ranges. The woofer’s impact is very well managed, with excellent rhythm and responsiveness, allowing it to remain musical even in pure hi-fi use. Finer details are beautifully preserved, even during loud passages.

Stereo+ (Norway)

: When pairing the Lumina I speakers with the Gravis I subwoofer, the reviewer notes that it is necessary to turn the subwoofer down by a few decibels to keep the vocals clear—this keeps the soundstage open, without the low-frequency response making the treble sound “heavy” or sluggish. When properly configured, the subwoofer delivers both deep bass and enhanced sound from the main speakers—without requiring constant adjustments for each music genre.

Features | Sonus Faber GRAVIS I

i
We are an official dealer and can supply all other products and models. We can often also order items from many other manufacturers for the shop. Feel free to ask! We accept trade-ins for both new and used items.
Dealership
i
The subwoofer provides support, ensuring that the midrange and high frequencies reach you with more impact, grandeur, and emotion. The midrange and high frequencies are carried by the low frequencies. When watching movies, it adds that extra dimension that most people simply can’t do without. A good subwoofer doesn’t vibrate itself, but simply sets the surrounding air in motion, resulting in a tight, undulating movement. Wonderful!
Subwoofer

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The Compact Disc (CD), like most inventions, did not appear out of thin air. After the invention of the laser in 1958, the first patent for optically readable disks was filed in 1961. The first digital video records were introduced in 1972. After a flop by Philips, the manufacturer, together with Sony, released the first CD in 1979. We do not know what it contained, but in 1982 the first CD was released for the market, it was the album Visitors by ABBA. In this year the first player became available and so began the elimination of the LP from the market. Many have literally thrown their LPs in the trash… we still see some visitors being disappointed when they tell us this. Velen hebben hun lp’s letterlijk bij het vuil gezet… sommige bezoekers zien wij nog steeds balen als ze dit vertellen.

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CD

The Compact Disc (CD), like most inventions, did not appear out of thin air. After the invention of the laser in 1958, the first patent for optically readable disks was filed in 1961. The first digital video records were introduced in 1972. After a flop by Philips, the manufacturer, together with Sony, released the first CD in 1979. We do not know what it contained, but in 1982 the first CD was released for the market, it was the album Visitors by ABBA. In this year the first player became available and so began the elimination of the LP from the market. Many have literally thrown their LPs in the trash… we still see some visitors being disappointed when they tell us this. Velen hebben hun lp’s letterlijk bij het vuil gezet… sommige bezoekers zien wij nog steeds balen als ze dit vertellen.
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