Ground Zero Ultra A-2 2-channel amplifier

Name: Ground Zero Ultra A-2 2-Channel Amplifier | Masori
Brand: Ground Zero
Price: 5095.75 EUR
Availability: InStock

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Ground Zero Ultra A-2 2-channel amplifier

Power at 4Ω: 2x 200 Watts RMS, at 2Ω: 2x 330 Watts RMS.
Power at 1Ω: 2x 450 Watts RMS, bridged 1200 Watts at 2Ω.
Signal-to-noise ratio >120 dB, frequency response 10 Hz–80 kHz.
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Ground ZeroCompetition GZCA 300.Q1-24V

Audio SystemX-ION X 6-Pack

Ultra A-2 by Ground Zero

Discover the Ultra A-2, a 2-channel amplifier from Ground Zero, known for its ultra-high-end sound quality. This amplifier impresses with a symmetrical design and is equipped with a high-quality Swiss ELMA switch. You have the option to choose between two BIAS settings and four sensitivity levels to create the perfect sound experience. The Ultra A-2 forgoes potentiometers and OPAs, delivering a direct signal. Rhodium-plated RCA sockets and exclusively manufactured MUNDORF® capacitors highlight the technical features. The option for water cooling and the attractive LED-lit Plexiglas base plate complete the offering.

features

Ultra-High-End 2-Channel Sound Amplifier
Symmetrical structure
Swiss-made High-End ELMA Selector Switch
2-stage election for the BIAS setting
4-stage selection for input sensitivity
Potentiometer-less and OPA-less, direct signal values
Rhodium-plated RCA jacks
Exclusively manufactured MUNDORF® audio capacitors for GZ
Plexiglass floor with LED lighting
Prepared for water cooling (sold separately)

Data

Execution Ultra-High-End SQ Sound Amplifier
Channels 2
Output power (@ 4Ω) 2x 200 Watts RMS
Output power (@ 2Ω) 2x 330 Watts RMS
Output power (@ 1Ω) 2x 450 Watts RMS
Output power (@ 2Ω) bridged 1200 Watts
Signal-to-Noise >120 dB
Frequency response 10 Hz – 80 kHz
Dimensions (W x L x H) 250 x 502 x 80 mm

Ground Zero Ultra A-2 Datenblatt

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Frequent questions about Ultra A-2

Wie profitiert Dein Sounderlebnis vom symmetrischen Aufbau des Ultra A-2?

The Ultra A-2 from Ground Zero is characterized by its symmetrical design, allowing for a very pure and detailed sound image. Especially if you enjoy listening to music at high volumes, you will notice that every nuance of your favorite songs comes through clearly, without distortion or unwanted background noise. Thanks to the precise signal transmission, highs remain clear and mids balanced, enabling you to discern every facet of your sound system. For example, if you use car audio tweeters or high-end car tweeters, their sound characteristics are particularly well represented. The components are optimally matched, so that each instrument and voice shines in its own space. Additionally, the symmetrical design contributes to a high signal-to-noise performance of over 120 dB. This allows you to enjoy absolute silence in quiet passages, while the sound envelops you during loud playback. The result: Pure harmony across the entire frequency spectrum.

Welche Besonderheiten bietet der Schweizer ELMA Wählschalter beim Ultra A-2?

The ELMA selector switch from Switzerland is a true hallmark of quality and underscores the high-end claim of the Ultra A-2 amplifier. With this selector switch, you can switch between different settings without relying on potentiometers. This keeps the signal path particularly low in pollutants and clean, which is reflected in a significantly improved sound. ELMA stands for fine mechanical precision, ensuring that the choice between sensitivity or BIAS levels is always made safely and reliably. With each setting, you experience a consistent sound level without any disturbing transition resistances or loose contacts. Especially for audiophiles who do not want to compromise on sound, this switch is a real highlight. Thanks to its robust construction, you can be sure that the ELMA selector switch will function reliably for a long time and consistently deliver the desired sound profile.

Wozu dienen die zwei BIAS-Einstellungen beim Ultra A-2?

The BIAS settings on the Ultra A-2 allow you to fine-tune the amplifier's operating mode. "BIAS" refers to the basic bias voltage of the power amplifier, and Ground Zero has intentionally integrated two different levels here. If you prefer a warmer, slightly tube-like sound, you can set the BIAS higher. This becomes particularly interesting if you value tonal subtleties and are looking for a very emotional sound. The second level is excellent if you prefer a cooler, more analytical reproduction – in this case, the amplifier remains overall cooler and can deliver its high output power of up to 1200 watts bridged at 2 Ω. Especially with high-quality high-end car tweeters or ring radiator tweeters, you can adjust your sound image to personal preference through these BIAS settings. Additionally, the flexible adjustment ensures that you have more control over the entire frequency range and can fully exploit the maximum potential of your system.

Wie funktioniert die Vierfach-Eingangsempfindlichkeit des Ultra A-2?

The four-stage input sensitivity of the Ultra A-2 allows you to precisely adjust it to different preamplifier or head unit output levels. You can choose exactly where your music source should drive the amplifier to avoid distortion and to fully develop the sound. This fine tuning process ensures that the full signal bandwidth is preserved and that the frequencies—from 10 Hz up to 80 kHz—are reproduced as faithfully as possible. Whether you are using a classic car radio, a modern multimedia receiver, or a dedicated DSP, the right input sensitivity is crucial for your sound to be not only loud but also clean and dynamic. Especially with delicate highs, such as when working with car audio tweeters, you will appreciate the clarity achieved through this versatile sensitivity adjustment. This allows you to achieve a fine and contemporary sound tuning.

Was macht der Verzicht auf Potentiometer und OPAs beim Ultra A-2 aus?

The Ultra A-2 consistently dispenses with potentiometers and operational amplifiers (OPAs) and instead relies on a direct signal path. This means that even the smallest sound information is transmitted through the electronics without being distorted by additional components. This aspect plays an important role, especially if you want to perceive your music in a very differentiated way. By forgoing analog control elements like potentiometers, potential sources of wear or noise are eliminated, allowing for a more stable and precise reproduction in the long term. The OPAs, which are commonly used in many standard power amplifiers, have also been omitted here to create as puristic a chain as possible. The result is an almost unadulterated sound, which is particularly advantageous for fine dynamic details and brilliant highs, for example, when driving high-end car tweeters. With this design decision, you retain a sound that is realized without technical compromises.

Wie unterstützt die optionale Wasserkühlung die Performance des Ultra A-2?

The option for water cooling is intended for anyone who wants to squeeze the most out of their Ultra A-2. Especially when you often drive at high volumes or push the sound level to the limit, the thermal stress on an amplifier can become extreme. With the separately available water cooling, the waste heat can be efficiently dissipated. This means more stable amplifier temperatures and therefore less risk of thermal limitations or automatically reduced power. If you often hold elaborate music sessions in your vehicle, driving high-quality ring radiator tweeters, powerful mid-bass drivers, and subwoofers at the same time, the current flow can quickly increase. With water cooling, performance remains at a top level for longer periods because the components do not overheat. At the same time, this cooling increases the longevity of your amplifier, so you will enjoy your Ultra A-2 for a long time.

Welche Rolle spielen die rhodiumbeschichteten RCA Buchsen für den Klang?

Rhodium is a highly corrosion-resistant precious metal that also keeps the resistance at the contact points low and is durable at the same time. When you use the rhodium-plated RCA inputs on the Ultra A-2, you benefit from a clean signal transfer. Especially with high-resolution music, inferior contact surfaces can cause interference, which can result in a loss of clarity or dynamics. The rhodium coating significantly minimizes such influences, allowing you to hear even the fine high frequencies and spatial details of your music precisely. Whether you want to enjoy delicate acoustic passages or prefer energetic bass, the rhodium-plated connections ensure consistent performance. This allows the Ultra A-2 to unleash its full potential, especially in conjunction with well-constructed speaker systems. In combination with exclusive MUNDORF® audio capacitors, tonal nuances are preserved just as the artist intended.

Wie integrierst Du den Ultra A-2, wenn Du das Beste aus Deinen High-End-Lautsprechern herausholen möchtest?

If you plan to integrate the Ultra A-2 into your car and get the most out of high-quality speakers, it is advisable to first optimally choose the frequency transition between the amplifier and the speakers. Especially if you like to use high-end car tweeters or even ring radiator tweeters, the clear and uncolored reproduction of the highs is crucial. Make sure to adjust the input sensitivity appropriately and use the BIAS levels to tailor the sound character to your preferences. Midrange drivers and subwoofers benefit from the high output power of the amplifier, as they have enough reserves for dynamic musical passages. A good example of this would be if you want to make every detail audible in acoustic music, but still need enough punch for energetic rock tracks or electronic beats. By using a direct signal path without OPAs, colorations are eliminated, allowing for very precise fine-tuning. This way, you get exactly the sound that excites you.

Ist der Ultra A-2 von Ground Zero mit gängigen europäischen Fahrzeugen wie BMW, Audi, Mercedes oder VW kompatibel?

The Ultra A-2 is universally designed and can therefore be installed in various European car brands, including BMW, Audi, Mercedes, or VW. However, you should ensure that there is enough space for the dimensions of 250 x 502 x 80 mm and that the power supply is appropriately sized. This is especially important if you want to fully utilize the high output power at 1 Ω (2 x 450 Watts RMS). A stable wiring setup is essential for the amplifier to transmit the music signals without distortion. Especially with components like car audio tweeters or powerful mid-bass drivers, a well-thought-out concept is important to avoid overloading the vehicle's protection circuits. So pay attention to proper fusing, cable cross-sections, and professional installation to ensure lasting enjoyment of this high-end amplifier.

Wie trägt die LED-beleuchtete Plexiglasbodenplatte zur wertigen Optik bei?

The LED-lit Plexiglass base plate gives the Ultra A-2 a very appealing and modern look at the same time. When you present your system in the evening or in a darker environment, the illuminated interior of the amplifier stands out particularly well. You can almost feel the aesthetics as you become aware of your unique technology. Especially the elaborate components, such as the MUNDORF® audio capacitors made exclusively for Ground Zero, are highlighted by the light and immediately show at first glance that high-end quality is involved. It is primarily a visual delight if you place a high value on design and want to make your car audio setup a real eye-catcher. This way, you not only combine excellent audio performance but also a wow effect as soon as you showcase your sound project. The Plexiglass base plate also ensures that you get insights into the symmetrical structure and the premium connection components, further enhancing the premium feel.

Let customers speak for us

from 9059 reviews

Jean François Tedesco

Alpine tube 12 bazooka , Un sacré caisson de basses ,

Un sacré caisson de basses , j'ai eu un 46 cm killer 454 de l'époque année 90 , qui tapait vraiment bien , mais ce tube est bien plus fort et plus ample, toutes les basses passent sans problème, avec une télécommande à réglage multiples taramps eq bass , et un ampli Machete de masori , le couple est parfait, personnellement j'en ai deux tubes et ça donne énormément, avec l'ampli 2 x 530 en 4 ohms . Parfois le plus simple est bien meilleur et plus durable .

SWT-12S4

11/29/2025

Bartosz Erber

X-10 v3 d2

Hallo. Sehr freundlicher Kundenservice und schnelle Auftragsabwicklung. Der Lautsprecher ist brandneu und unbenutzt. Ich habe ihn vor einiger Zeit gekauft, aber erst kürzlich das Gehäuse fertiggestellt. Die Parameter entsprechen den Herstellerangaben: 42,5 Liter Nettovolumen, abgestimmt auf 32 Hz und 21 mm starkes Sperrholz. Ich hatte noch nie einen 10-Zoll-Lautsprecher und wusste nicht, was mich erwartet, aber das Ergebnis hat meine kühnsten Erwartungen übertroffen. Der Bass aus einem so kleinen Lautsprecher in einem so kleinen Gehäuse ist einfach unglaublich. Um den X-10 zu kaufen, habe ich meinen DD 712f in einem 70-Liter-Gehäuse verkauft, und der war ein Volltreffer. Der Sundown ist in jeder Hinsicht besser. Ich kann diesen Lautsprecher und den Händler, bei dem ich ihn gekauft habe, wärmstens empfehlen. Beste Grüße.

X10 v3

11/18/2025

tatazz

Est arrivé à la maison très rapidement

Est arrivé à la maison très rapidement 👌🏽

Hydrogen GZHW 25XSPL

11/13/2025

Anonym

.

Geht echt gut und leicht zum einstellen

GPX2200.1D

11/12/2025

Georges, Alexander, Vainohoarii NAGLE

Très satisfaisant.

Bonjour, je reçu le colis bien emballé.
Je recommande vivement, la livraison est gratuite et rapide, je recommanderai sûrement encore chez Masori.

RS-YS12

11/10/2025

SPYRIDON D.

Bought again

Bought again. Great price, fast delivery, nice !

Mille Pro MP 165.3

11/06/2025

Arthur Mol

Perfect sound, I bough 2 pairs for the door and

Perfect sound, I bough 2 pairs for the door and the difference between these and the stock ones are huge

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11/03/2025

christopher Martinez

Deaf bonce

Très bonne qualité
Envoie rapide et soigné
Je recommande

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Tolles Produkt. Sehr hochwertig und passgenau. Passt in die hinteren Türen von meinem Passat B8 2019 perfekt.

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Tomáš hokuf

Nice

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Michael Steffan

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Preis/Leistung Qualität top!

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Anonym

Top Upgrade für Canton System

Ich habe den Woofer in meinem Skoda Octavia 3 mit Canton Soundsystem eingebaut.
Der Einbau war Plug & Play, alles passt perfekt ohne Anpassungen.
Im Vergleich zum originalen Canton Subwoofer spielt dieser deutlich stärker, präziser und mit mehr Druck.
Ich kann den Woofer jedem empfehlen, der mehr Bass aus dem Canton-System herausholen möchte – lohnt sich absolut!

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