Symphony II 11-212/C8/50 HEX
Symphony II 11-212/C8/50 HEX
Symphony II 11-212/C8/50 HEX
Symphony II 11-212/C8/50 HEX

Features

91 dB SPL
91 dB SPL

Efficiency

30 Hz - 1 kHz
30 Hz - 1 kHz

recommended frequency range

11" | ±280mm
11" | ±280mm

dimensions

Fiber optic
Fiber optic

Membrane material

±5 mm
±5 mm

linear motion

Features

91 dB SPL
91 dB SPL

Efficiency

30 Hz - 1 kHz
30 Hz - 1 kHz

recommended frequency range

11" | ±280mm
11" | ±280mm

dimensions

Fiber optic
Fiber optic

Membrane material

±5 mm
±5 mm

linear motion

Vendor:ETON Soundsysteme GmbH

Symphony II 11-212/C8/50 HEX

Der ETON Symphony II 11-212 ist ein 11"-Tieftöner der Spitzenklasse für audiophile DIY-Projekte und Lautsprechermanufakturen, bei denen maximaler Tiefgang, Hexacone-Membrantechnologie und ein kompaktes 11"-Format gefragt sind. Mit der patentierten Hexacone-Membran im Mehrschichtaufbau – einer aus der Luft- und Raumfahrttechnik übernommenen Wabenstruktur – vereint der Symphony II 11-212 außergewöhnliche Membransteifigkeit mit niedriger Masse (Mmd = 61 g). Die Hexacone-Membran bleibt auch bei hohen Auslenkungen bis Xmax ±5,0 mm elektrisch formstabil – linear, kontrolliert, ohne Partialschwingungen bei hohen Pegeln. Mit einer Resonanzfrequenz von 24 Hz (TSP), einem Kraftfaktor von BL = 11,6 Tm und einer Belastbarkeit von 150 W (IEC 60268-5) liefert der Symphony II 11-212 echten Infraschall-Tiefgang bis unter 20 Hz im Bassreflexgehäuse – im kompakten 11"-Format mit 280 mm Gesamtdurchmesser und nur 3,30 kg.

Die 50-mm-Kupfer-Schwingspule auf Kapton-Träger mit 1,06 T magnetischer Flussdichte sorgt für einen kraftvollen, präzisen Antrieb bei thermischer Belastbarkeit im Langzeitbetrieb. Der mechanische Xmax von ±14,6 mm bietet einen großzügigen Sicherheitspuffer über den linearen Bereich hinaus. Das Äquivalentvolumen von 134 dm³ und der Qts von 0,31 positionieren den Treiber klar für Bassreflex-Konstruktionen – bei optimaler Abstimmung um 18–25 Hz ist Tiefgang bis unter 20 Hz erreichbar. Made in Germany, aus der ETON-Manufaktur.

Warum der ETON Symphony II 11-212 für Ihr Projekt?

  • Patentierte Hexacone-Membran im Mehrschichtaufbau: Raumfahrttechnologie im Lautsprecherbau – formstabil bei höchsten Pegeln, linear bei 150 W wie bei 1 W
  • BL = 11,6 Tm / fs 24 Hz (TSP): kraftvoller Antrieb mit Infraschall-Tiefgang bis unter 20 Hz im Bassreflexgehäuse
  • Xmax ±5,0 mm elektrisch / ±14,6 mm mechanisch: hoher Linearhub für verzerrungsarme Basswiedergabe auch bei 150 W und tiefen Frequenzen
  • 150 W Belastbarkeit (IEC 60268-5) / 91 dB: hohe Pegelfestigkeit für anspruchsvolle Subwoofer- und 3-Wege-Konstruktionen
  • 50-mm-Cu-Schwingspule / Sd = 366 cm² / Vas = 134 dm³: großzügige Membranfläche und thermische Belastbarkeit für pegelfeste Tiefbasswiedergabe
  • 280 mm Ø, 110,5 mm Tiefe, 3,30 kg: kompaktes 11"-Format für Projekte, bei denen das 12"-Format zu groß ist – ohne Kompromisse beim Tiefgang

Für DIY-Projekte und Lautsprechermanufakturen, bei denen Hexacone-Membrantechnologie, Infraschall-Tiefgang und ein kompaktes 11"-Format gefragt sind – der ETON Symphony II 11-212. Made in Germany, aus der ETON-Manufaktur.

Patented hexacone diaphragm in a multi-layer construction – Aerospace technology used in loudspeaker manufacturing: dimensionally stable at the highest sound pressure levels, with linear performance at 150 W just as at 1 W, without partial vibrations.

Patented hexacone diaphragm in a multi-layer construction – Aerospace technology used in loudspeaker manufacturing: dimensionally stable at the highest sound pressure levels, with linear performance at 150 W just as at 1 W, without partial vibrations.

24 Hz fs (TSP) in the compact 11-inch format: 280 mm diameter, 3.30 kg – Infrasonic low-end extension down to below 20 Hz for projects where a full 12-inch format is not an option.

24 Hz fs (TSP) in the compact 11-inch format: 280 mm diameter, 3.30 kg – Infrasonic low-end extension down to below 20 Hz for projects where a full 12-inch format is not an option.

BL = 11.6 Tm / Xmax ±5.0 mm electrical / ±14.6 mm mechanical / 150 W: powerful drive and high linear stroke for low-distortion, level-stable bass reproduction.

BL = 11.6 Tm / Xmax ±5.0 mm electrical / ±14.6 mm mechanical / 150 W: powerful drive and high linear stroke for low-distortion, level-stable bass reproduction.

91 dB / 50-mm copper voice coil / Sd = 366 cm² / Vas = 134 dm³ / Qts 0.31: high efficiency, thermal durability, and precise bass reflex tuning – Made in Germany.

91 dB / 50-mm copper voice coil / Sd = 366 cm² / Vas = 134 dm³ / Qts 0.31: high efficiency, thermal durability, and precise bass reflex tuning – Made in Germany.

In stock, ready to ship
290,00 EURUnit price(290,00 EUR each)

Pairs well with

Fast shipping

Try it risk-free for 30 days

2-year manufacturer's warranty

Made in Germany

91 dB / Hexacone diaphragm / fs 24 Hz – usable from 20 Hz to 1.5 kHz, 150 W

The frequency response of the Symphony II 11-212 demonstrates the behavior of a top-class 11" woofer with a patented Hexacone diaphragm in a multilayer construction: a uniform, controlled amplitude response from approx. 20 Hz to 1.5 kHz – with 91 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 ±5.0 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 150 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 11-212 a pure woofer for 3-Wege-Systeme – the crossover frequency to the midrange driver should be selected at approx. 200–500 Hz.

As a subwoofer in active systems with an electronic crossover, the Symphony II 11-212 is the choice for projects where the 12" format is too large: the resonance frequency of 24 Hz, the mechanical Xmax of ±14.6 mm, and the 150 W power handling enable high-level subwoofer reproduction down into the infrasonic range below 20 Hz – in a compact 11" format with a total diameter of 280 mm and a weight of only 3.30 kg. The equivalent volume of 134 dm³ and the Qts of 0.31 are the decisive parameters for 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 = 11.6 Tm, 50-mm copper voice coil, 1.06 T). An 11" woofer with a Hexacone diaphragm and fs 24 Hz that sounds the way it measures – deep, high-level, with genuine aerospace technology inside. Made in Germany, from the ETON manufactory.

Qts 0.31 / fs 24 Hz / BL 11.6 Tm – Hexacone membrane, 150 W, compact 11" format

The impedance curve of the Symphony II 11-212 shows the behavior of a top-class 11" woofer with a patented Hexacone diaphragm in a multilayer construction: The impedance maximum is at approx. 24 Hz (TSP) – the basis for true infrasound 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 134 dm³ requires generous enclosure volumes for an optimal tuning around 18–25 Hz. The force factor BL = 11.6 Tm ensures a constant, precise drive across the entire linear excursion range up to Xmax ±5.0 mm electrically – even at 150 W power handling (IEC 60268-5) and low frequencies below 25 Hz. The high mechanical Q factor (Qms = 9.94) demonstrates the extremely low mechanical losses of the drive system.

The Hexacone diaphragm in a multilayer construction is the acoustic heart of the Symphony II 11-212: The honeycomb structure adopted from aerospace technology provides exceptional bending stiffness combined with low mass (Mmd = 61 g). The impedance behavior reflects this quality: The cleanly defined impedance maximum without secondary resonances confirms the mechanical precision of the overhung drive system and the dimensional stability of the Hexacone diaphragm even at high excursions. The 50-mm copper voice coil on a Kapton former (Le = 1.15 mH, 1.06 T) ensures a stable, predictable load on all amplifiers.

Above resonance, the driver behaves electrically stable: The impedance rises moderately toward high frequencies due to the voice coil inductance – an expected value for an 11" woofer with a 50-mm voice coil that does not complicate crossover design in 3-way systems. An 11" woofer with Hexacone diaphragm and fs 24 Hz that behaves in enclosure calculations exactly as it does in simulation – reproducible, reliable, Made in Germany.

Product Specification

Dimensions and installation
Total Diameter

280 mm

Cutout Diameter

242 mm

Total Depth

110,5 mm

Rim Thickness

8 mm

Weight

3,30 kg

Screw Hole Diameter (Screw / Head)

5,5 mm / 9,7 mm

Terminal (Negative / Positive)

4,8 mm / 6,3 mm

Voice coil
Diameter

50 mm

Height

18 mm

Wire material

Cu

Substrate material

Kapton

Winding layers

2

Magnetic drive
Magnetic flux density

1.06 T

Air gap height

8 mm

Material

Ferrite

Dimensions

134 mm x 57 mm

Drive system

Overhang

Ferrofluid

nein

Technical data
Nominal Impedance

Zn = 8 Ohm

DC Resistance

Re = 5.2 Ohm

1 W Resonance Frequency

fr = 22 Hz

TSP Resonance Frequency

fr = 24 Hz

Suspension Compliance

Cms = 0.71 mm/N

Mechanical Quality Factor

Qms = 9.94

Electrical Quality Factor

Qes = 0.32

Total Quality Factor

Qts = 0.31

Mechanical Resistance

Rms = 1.01 kg/s

Total moving mass (including moving air mass)

Mmd = 61 g

Effective Radiating Area

Sd = 366 cm²

Voice Coil Inductance

Le = 1.15 mH

Force Factor

BLxl = 11.6 Tm

Electrical Xmax

+/- 5.0 mm

Mechanical Xmax

+/- 14.6 mm

Equivalent Volume

Vas = 134.0 dm³

Average Sound Pressure Level 1 W / 1 m

91 dB SPL

Power Handling

150 W*


*IEC 60268-5

Downloads

Technical Data Sheet Symphony II 11212

FAQs

Frequently asked question

Use this text to answer questions in as much detail as possible for your customers.

Frequently asked question

Use this text to answer questions in as much detail as possible for your customers.

Frequently asked question

Use this text to answer questions in as much detail as possible for your customers.

Frequently asked question

Use this text to answer questions in as much detail as possible for your customers.

Frequently asked question

Use this text to answer questions in as much detail as possible for your customers.