Realistic Stage Atmosphere
The experience of a real concert atmosphere or club feeling needs professional high SPL levels to be achieved.
This however, requires very special and powerful speakers as well as amplifiers. GROUND ZERO´s development department doesn´t make any compromise,
whenever the purpose of the product is that clear. Because of this, a COMPETITION product is the right choice for demanding customers with high SPL level expectations.
Not a huge surprise but a great honour, the performance of the GZ ULTRA A-2 charmed the members of the EISA, a group of international car audio trade journalists, right from the very first listening sessions that much that there was any doubt about the decision to award this amplifier as
“BEST PRODUCT – IN-CAR HIGH-END COMPONENT”
Only the best components ever have been considered good enough to find their way to the REFERENCE amplifier line-up.
Cooled by a high-quality copper-anodized aluminum heat sink, each model has been equipped with a slightly toned acrylic bottom allowing a glance on the selected components accurately arranged on the discreetly white illuminated and copper-plated double-layer pc board.
The 4-channel version has been awarded by the EISA organization as the world´s best in-car amplifier 2018/2019.
11128100: 1-channel competition SPL amplifier
11128101: 1-channel competition SPL amplifier
11128102: 1-channel competition SPL amplifier
11128103: 1-channel competition SPL amplifier
11128104: 1-channel competition SPL amplifier
11428100: 4-channel competition SPL amplifier
Competition Speaker Systems
31128010: 7×10″ 4-way coaxial speaker system
31128010-1: 165 mm / 6.5″ 2-way coaxial speaker system
31128011: 6×9″ 2-way coaxial speaker system
31228011: 200 mm / 8″ 2-way coaxial speaker system
31228020: 200 mm / 8″ 2-way component speaker system
31328012: 165 mm / 6.5″ 2-way coaxial speaker system with neodymium motor
31328020: 165 mm / 6.5″ 2-way component speaker system
Competition Speaker Components
ULTRA speakers are designed for the most demanding music lover.
Carefully built by hand with the best materials and selected in pairs, they are delivered in fine wooden boxes.
The mid-bass driver ULTRA K-165 uses a high-tech fabric cone “Made in Germany” in conjunction with linear suspension and a narrow-tolerance copper voice coil with a linearized NEO motor. Built in a filigree aluminum basket for optimal air flow, these are the ingredients for outstanding neutrality and sound quality.
The tweeter ULTRA T-30 with its 30mm coated silk dome is characterized by a particularly low resonance frequency and extreme neutrality. The linearized NEO magnet system with the complex rear ventilation of the cone in the solid aluminum housing enables the wonderfully spatial and precise audio reproduction with an extremely wide frequency range.
REFERENCE speakers are designed for demanding high-end music lovers. Accurately hand built in Europe, selected in corresponding pairs and delivered in classy wooden boxes. Midbass and midrange speakers are made from hand-coated, pressed paper cones and hand-spooled copper voice coils, inserted into manually machined aluminum parts of the basket, forming the basis for outstanding high-end sound quality. The tweeter features a particularly low resonance frequency. The usable wide frequency range of the hand-coated silk dome thus enables astonishingly spatial and precise audio reproduction.
32128110: 25 mm / 1″ high power silk dome tweeter
32128121: High-performance 25 mm / 1″ dome tweeter
32128305: 25 mm / 1″ aluminum dome compression tweeter
32128306: 25 mm / 1″ aluminum dome compression tweeter
32128330: 38 mm / 1.5″ aluminum dome compression tweeter
32128350: 25 mm / 1″ aluminum dome compression tweeter
32128351: 25 mm / 1″ aluminum dome compression tweeter
32128400: 44.5 mm / 1.75″ aluminum dome compression tweeter
32128500: 44.5 mm / 1.75″ titanium dome compression tweeter
32128501: 44.5 mm / 1.75″ titanium dome compression tweeter
32228030: 165 mm / 6.5″ high power midrange speaker
32228031: 200 mm / 8″ high power midrange speaker
32228032: 250 mm / 10″ high power midrange speaker
32228060: 165 mm / 6.5″ high power midrange speaker
32228061: 165 mm High-Power Mitteltonlautsprecher
32328030: 165 mm / 6.5″ SPL midwoofer
32328041: 200 mm / 8″ SPL midwoofer
32328042: 250 mm / 10″ SPL midwoofer
This exceptional subwoofer has been optimized to perform in small enclosures.
51528030: 30 cm / 12″ high power SPL subwoofer
81520021: 2-way variable passive crossover