Symphony II 12-212/C8/62 HEX
Symphony II 12-212/C8/62 HEX
Symphony II 12-212/C8/62 HEX
Symphony II 12-212/C8/62 HEX

Features

92 dB SPL
92 dB SPL

Efficiency

25 Hz - 0.5 kHz
25 Hz - 0.5 kHz

recommended frequency range

12" | ±300mm
12" | ±300mm

dimensions

Fiber optic
Fiber optic

Membrane material

±8.5 mm
±8.5 mm

linear motion

Features

92 dB SPL
92 dB SPL

Efficiency

25 Hz - 0.5 kHz
25 Hz - 0.5 kHz

recommended frequency range

12" | ±300mm
12" | ±300mm

dimensions

Fiber optic
Fiber optic

Membrane material

±8.5 mm
±8.5 mm

linear motion

Vendor:ETON Soundsysteme GmbH

Symphony II 12-212/C8/62 HEX

Der ETON Symphony II 12-212 ist ein 12"-Langhub-Tieftöner der Spitzenklasse – entwickelt für audiophile DIY-Projekte und Lautsprechermanufakturen mit höchsten Anforderungen an Tiefgang, Pegelfestigkeit und Klangtreue. Das Herzstück des Symphony II 12-212 ist die patentierte Hexacone-Membran im Mehrschichtaufbau: eine aus der Luft- und Raumfahrttechnik übernommene Wabenstruktur, die eine außergewöhnliche Steifigkeit bei gleichzeitig niedriger Masse ermöglicht. Die Hexacone-Membran bleibt auch bei hohen Auslenkungen bis Xmax ±8,5 mm elektrisch formstabil – präzise, kontrolliert, ohne Kompromisse. Mit einer Resonanzfrequenz von 24 Hz (TSP), einem Kraftfaktor von BL = 15,7 Tm und einer Belastbarkeit von 200 W (IEC 60268-5) ist der Symphony II 12-212 für Subwoofer-Konstruktionen und 3-Wege-Systeme mit höchsten Pegelanforderungen ausgelegt.

Die 62-mm-Kupfer-Schwingspule auf Kapton-Träger mit 10 mm Luftspalthöhe sorgt für einen kraftvollen, präzisen Antrieb bei thermischer Belastbarkeit im Langzeitbetrieb. Der mechanische Xmax von ±15,7 mm bietet einen Sicherheitspuffer weit über den linearen Bereich hinaus – auch bei 200 W und tiefen Frequenzen unter 25 Hz bleibt die Wiedergabe kontrolliert und verzerrungsarm. Das Äquivalentvolumen von 176 dm³ und der Qts von 0,31 positionieren den Treiber klar für Bassreflex-Konstruktionen mit Tiefgang bis unter 20 Hz. Made in Germany, aus der ETON-Manufaktur.

Warum der ETON Symphony II 12-212 für Ihr Projekt?

  • Patentierte Hexacone-Membran im Mehrschichtaufbau: Raumfahrttechnologie im Lautsprecherbau – maximale Steifigkeit bei niedriger Masse für eine formstabile, verzerrungsarme Wiedergabe auch bei höchsten Pegeln
  • BL = 15,7 Tm / fs 24 Hz (TSP): kraftvoller Antrieb mit echtem Infraschall-Tiefgang bis unter 20 Hz im Bassreflexgehäuse
  • Xmax ±8,5 mm elektrisch / ±15,7 mm mechanisch: hoher Linearhub für verzerrungsarme Basswiedergabe auch bei 200 W und tiefen Frequenzen
  • 200 W Belastbarkeit (IEC 60268-5) / 92 dB: für höchste Pegelanforderungen in Subwoofer- und 3-Wege-Konstruktionen
  • 62-mm-Cu-Schwingspule / Sd = 515 cm² / Vas = 176 dm³: maximale Membranfläche und thermische Belastbarkeit für pegelfeste Tiefbasswiedergabe
  • 330,5 mm Ø, 150 mm Tiefe, 6,30 kg: robustes 12"-Format für großzügige Bassreflexgehäuse und professionelle Subwoofer-Konstruktionen

Für DIY-Projekte und Lautsprechermanufakturen, bei denen maximaler Tiefgang, höchste Pegelfestigkeit und die überlegene Steifigkeit der patentierten Hexacone-Membran gefragt sind – der ETON Symphony II 12-212. Made in Germany, aus der ETON-Manufaktur.

Patented hexacone diaphragm in a multi-layer construction – aerospace technology in loudspeaker manufacturing: dimensionally stable at peak sound levels, linear at 200 W just like at 1 W, without partial vibrations.

Patented hexacone diaphragm in a multi-layer construction – aerospace technology in loudspeaker manufacturing: dimensionally stable at peak sound levels, linear at 200 W just like at 1 W, without partial vibrations.

BL = 15.7 Tm / fs 24 Hz (TSP) / Xmax ±8.5 mm (electrical): Powerful drive unit with infrasonic bass extension down to below 20 Hz – for high-end subwoofers and 3-way systems.

BL = 15.7 Tm / fs 24 Hz (TSP) / Xmax ±8.5 mm (electrical): Powerful drive unit with infrasonic bass extension down to below 20 Hz – for high-end subwoofers and 3-way systems.

200 W power handling (IEC 60268-5) / 92 dB / Mechanical Xmax: ±15.7 mm: Delivers the highest peak SPL durability and linear excursion for low-distortion bass reproduction even at extreme volumes.

200 W power handling (IEC 60268-5) / 92 dB / Mechanical Xmax: ±15.7 mm: Delivers the highest peak SPL durability and linear excursion for low-distortion bass reproduction even at extreme volumes.

62-mm copper voice coil / Sd = 515 cm² / Vas = 176 dm³ / Qts 0.31: maximum diaphragm area, thermal durability, and precise bass reflex tuning – Made in Germany.

62-mm copper voice coil / Sd = 515 cm² / Vas = 176 dm³ / Qts 0.31: maximum diaphragm area, thermal durability, and precise bass reflex tuning – Made in Germany.

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2-year manufacturer's warranty

Made in Germany

92 dB / Hexacone diaphragm / fs 24 Hz – usable from 20 Hz to 1.5 kHz, 200 W

The frequency response of the Symphony II 12-212 demonstrates the behavior of a top-class 12" woofer with a patented Hexacone diaphragm in a multilayer construction: a uniform, controlled amplitude response from approx. 20 Hz to 1.5 kHz – with 92 dB efficiency and a stable level structure across the entire transmission range. The Hexacone diaphragm is the decisive factor for this linear frequency response: the honeycomb structure adopted from aerospace technology, in a multilayer construction, remains electrically dimensionally stable even at high excursions up to Xmax ±8.5 mm – without the partial oscillations and peaks in the upper transmission range that occur with conventional diaphragms at high levels. The result is a frequency response that is just as linear at 200 W as it is at 1 W.

Particularly relevant for DIY loudspeaker developers and loudspeaker manufacturers: the usable transmission range up to approx. 1.5 kHz makes the Symphony II 12-212 a pure woofer for 3-Wege-Systeme – the crossover frequency to the midrange driver should be selected at approx. 200–500 Hz in order to operate the driver exclusively in its optimal working range.

As a subwoofer in active systems with an electronic crossover, the Symphony II 12-212 is the reference choice: the resonance frequency of 24 Hz, the mechanical Xmax of ±15.7 mm, and the 200 W power handling enable a level-stable subwoofer reproduction down into the infrasonic range below 20 Hz. The equivalent volume of 176 dm³ and the Qts of 0.31 are the decisive parameters for the enclosure design in bass-reflex operation.

The uniform frequency response without dips or peaks in the transmission range demonstrates the superior quality of the Hexacone diaphragm and the powerful drive system (BL = 15.7 Tm, 62-mm copper voice coil). A 12" woofer that sounds the way it measures – deep, level-stable, with genuine aerospace technology inside. Made in Germany, from the ETON manufactory.

Qts 0.31 / fs 24 Hz / BL 15.7 Tm – Hexacone diaphragm, 200 W, primarily for bass reflex

The impedance curve of the Symphony II 12-212 shows the behavior of a top-class 12" woofer with a patented Hexacone diaphragm in a multilayer construction: The impedance maximum is at approx. 24 Hz (TSP) – the basis for true infrasonic depth down to below 20 Hz in a bass-reflex enclosure. The Qts value of 0.31 clearly positions the driver for bass-reflex designs: The equivalent volume of 176 dm³ requires generous enclosure volumes for an optimal tuning around 18–25 Hz. The force factor BL = 15.7 Tm is the decisive drive parameter: It ensures constant, precise drive across the entire linear excursion range up to Xmax ±8.5 mm electrically – even at 200 W power handling (IEC 60268-5) and low frequencies below 25 Hz.

The Hexacone diaphragm in a multilayer construction is the decisive difference compared to conventional diaphragm designs: The honeycomb structure adopted from aerospace engineering provides exceptional bending stiffness combined with low mass (Mmd = 92.7 g). The impedance behavior reflects this quality: The cleanly defined impedance maximum without secondary resonances demonstrates the mechanical precision of the overhung drive system and the dimensional stability of the Hexacone diaphragm even at high excursions. The 62-mm copper voice coil on a Kapton former (Le = 1.57 mH) ensures a stable, predictable load on all amplifiers and power stages.

Above resonance, the driver behaves electrically stable: The impedance rises moderately toward high frequencies due to the voice coil inductance – an expected value for a 12" woofer with a 62-mm voice coil that does not complicate crossover design in 3-way systems. The 8-ohm design allows easy driving with common hi-fi amplifiers and professional power amplifiers. A 12" woofer that behaves in enclosure calculation exactly as it does in simulation – reproducible, reliable, Made in Germany.

Product Specification

Dimensions and installation
Total Diameter

330.5 mm

Cutout Diameter

282 mm

Total Depth

150 mm

Rim Thickness

8.5 mm

Weight

6.30 kg

Screw Hole Diameter (Screw / Head)

6.5 mm / 11 mm

Terminal (Negative / Positive)

4.8 mm / 6.3 mm

Voice coil
Diameter

62 mm

Height

27 mm

Wire material

Cu

Carrier material

Kapton

Winding layers

2

Magnetic drive
Magnetic flux density

1.00 T

Air gap height

10 mm

Material

Ferrite

Dimensions

169 mm x 75 mm

Drive system

Overhang

Ferrofluid

nein

Technical data
Nominal Impedance

Zn = 8 Ohm

DC Resistance

Re = 6.2 Ohm

Resonance Frequency at 1 W

fr = 23 Hz

Thiele-Small Resonance Frequency

fr = 24 Hz

Suspension Compliance

Cms = 0.47 mm/N

Mechanical Quality Factor

Qms = 7.15

Electrical Quality Factor

Qes = 0.32

Total Quality Factor

Qts = 0.31

Mechanical Resistance

Rms = 2.13 kg/s

Total Moving Mass (including moving air mass)

Mmd = 92.7 g

Effective Radiating Area

Sd = 515 cm²

Voice Coil Inductance

Le = 1.57 mH

Force Factor

BLxl = 15.7 Tm

Electrical Xmax

+/- 8.5 mm

Mechanical Xmax

+/- 15.7 mm

Equivalent Volume

Vas = 176.0 dm³

Average Sound Pressure Level at 1 W / 1 m

92 dB SPL

Power Handling

200 W*


*IEC 60268-5

Downloads

Technical Data Sheet Symphony II 12212

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