Symphony II 3-212/C8/25 HEX
Symphony II 3-212/C8/25 HEX
Symphony II 3-212/C8/25 HEX
Symphony II 3-212/C8/25 HEX

Features

89 dB SPL
89 dB SPL

efficiency

130 Hz - 13 kHz
130 Hz - 13 kHz

recommended frequency range

3" | ±80mm
3" | ±80mm

dimensions

Fiber optic
Fiber optic

Membrane material

±2 mm
±2 mm

linear motion

Features

89 dB SPL
89 dB SPL

efficiency

130 Hz - 13 kHz
130 Hz - 13 kHz

recommended frequency range

3" | ±80mm
3" | ±80mm

dimensions

Fiber optic
Fiber optic

Membrane material

±2 mm
±2 mm

linear motion

Vendor:ETON Soundsysteme GmbH

Symphony II 3-212/C8/25 HEX

Der ETON Symphony II 3-212 ist ein 3"-Mitteltöner der Spitzenklasse für audiophile DIY-Projekte und Lautsprechermanufakturen, bei denen ein präziser, räumlich offener Mittelton mit Hexacone-Membrantechnologie und einem kraftvollen Neodym-Antrieb gefragt sind. Das Herzstück des Symphony II 3-212 ist die patentierte Hexacone-Membran im Mehrschichtaufbau in Kombination mit einem Neodym-Magneten mit 1,50 T magnetischer Flussdichte – der höchsten im gesamten Symphony II Sortiment. Das Ergebnis ist ein BL-Wert von 7,2 Tm bei einer bewegten Masse von nur 4,4 g: ein außergewöhnliches Antriebsverhältnis, das eine blitzschnelle Impulswiedergabe, eine präzise Transientendarstellung und eine räumlich offene Klangabbildung ermöglicht. Die extrem niedrige Schwingspuleninduktivität von Le = 0,11 mH sorgt für einen linearen Frequenzgang weit in den Hochtonbereich – die Grundlage für eine nahtlose Integration in 3-Wege-Systeme mit hohen Trennfrequenzen.

Mit einer Resonanzfrequenz von 112 Hz (TSP), einem Qts von 0,30 und einem Äquivalentvolumen von nur 0,7 dm³ ist der Symphony II 3-212 für den Einsatz in kleinen, geschlossenen Mitteltonkammern oder offenen Schallwandkonstruktionen ausgelegt. Die 25-mm-Kupfer-Schwingspule auf Kapton-Träger sorgt für thermische Belastbarkeit bei 40 W (IEC 60268-5). Mit 102 mm Gesamtdurchmesser und nur 0,66 kg ist der Symphony II 3-212 der kompakteste Treiber im Symphony II Sortiment – für Projekte, bei denen Hexacone-Membranqualität im kleinsten Format gefragt ist. Made in Germany, aus der ETON-Manufaktur.

Warum der ETON Symphony II 3-212 für Ihr Projekt?

  • Patentierte Hexacone-Membran im Mehrschichtaufbau: Raumfahrttechnologie im Lautsprecherbau – formstabil, präzise, räumlich offen
  • Neodym-Magnet, 1,50 T: höchste magnetische Flussdichte im Symphony II Sortiment – kraftvoller Antrieb im kompaktesten Format
  • BL = 7,2 Tm / Mmd = 4,4 g: außergewöhnliches Antriebsverhältnis für blitzschnelle Impulswiedergabe und präzise Transientendarstellung
  • Le = 0,11 mH: extrem niedrige Schwingspuleninduktivität für einen linearen Frequenzgang weit in den Hochtonbereich – einfache Weichenauslegung
  • 89 dB / 40 W (IEC 60268-5) / fs 112 Hz (TSP) / Qts 0,30: hoher Wirkungsgrad für einen 3"-Mitteltöner, präzise Auslegungsparameter
  • 102 mm Ø, 52 mm Tiefe, 0,66 kg: kompaktestes Format im Symphony II Sortiment – für kleine Mitteltonkammern und offene Schallwandkonstruktionen

Für DIY-Projekte und Lautsprechermanufakturen, bei denen Hexacone-Membrantechnologie, ein kraftvoller Neodym-Antrieb und ein präziser, räumlich offener Mittelton im kompakten 3"-Format gefragt sind – der ETON Symphony II 3-212. Made in Germany, aus der ETON-Manufaktur.

Patented hexacone membrane in multi-layer construction + 1,50 T neodymium magnet – Aerospace technology meets the most powerful drive in the Symphony II product range: precise, spatially open, dimensionally stable.

Patented hexacone membrane in multi-layer construction + 1,50 T neodymium magnet – Aerospace technology meets the most powerful drive in the Symphony II product range: precise, spatially open, dimensionally stable.

BL = 7,2 Tm / Mmd = 4,4 g / Le = 0,11 mH: extraordinary drive ratio for lightning-fast impulse response and simple, phase-optimized crossover design without impedance correction.

BL = 7,2 Tm / Mmd = 4,4 g / Le = 0,11 mH: extraordinary drive ratio for lightning-fast impulse response and simple, phase-optimized crossover design without impedance correction.

89 dB / 40 W (IEC 60268-5) / fs 112 Hz (TSP) / Vas 0.7 dm³: high efficiency, precise design parameters for small midrange enclosures starting at 0.5 liters and open baffle constructions.

89 dB / 40 W (IEC 60268-5) / fs 112 Hz (TSP) / Vas 0.7 dm³: high efficiency, precise design parameters for small midrange enclosures starting at 0.5 liters and open baffle constructions.

102 mm diameter, 52 mm depth, 0.66 kg – most compact format in the Symphony II product range: Hexacone diaphragm quality and neodymium driver in the smallest 3" enclosure. Made in Germany.

102 mm diameter, 52 mm depth, 0.66 kg – most compact format in the Symphony II product range: Hexacone diaphragm quality and neodymium driver in the smallest 3" enclosure. Made in Germany.

In stock, ready to ship
130,00 EURUnit price(130,00 EUR each)

Pairs well with

Fast shipping

Try it risk-free for 30 days

2-year manufacturer's warranty

Made in Germany

89 dB / Neodymium 1.50 T / Le 0.11 mH – usable from 300 Hz to 5 kHz, Hexacone membrane

The frequency response of the Symphony II 3-212 demonstrates the behavior of a top-class 3" midrange driver with patented Hexacone diaphragm and neodymium drive: a smooth, controlled amplitude response from approx. 300 Hz to 5 kHz – with 89 dB efficiency and a stable level structure across the entire transmission range. The extremely low voice coil inductance of Le = 0.11 mH is the decisive factor for this linear high-frequency response: it prevents the inductive impedance rise that, in drivers with higher inductance, leads to a level drop in the upper transmission range. The result is a frequency response that remains linear well beyond 5 kHz – the foundation for seamless, phase-optimized integration with the tweeter.

Particularly relevant for DIY loudspeaker developers and loudspeaker manufacturers: the usable transmission range of approx. 300 Hz to 5 kHz makes the Symphony II 3-212 the ideal midrange driver for 3-Wege-Systeme – crossover frequency downward at approx. 300–500 Hz to the woofer, crossover frequency upward at approx. 3–5 kHz to the tweeter. The resonance frequency of 112 Hz (TSP) and the equivalent volume of only 0.7 dm³ enable use in small, sealed midrange chambers from approx. 0.5–1 liter or in open baffle designs. The neodymium magnet with 1.50 T and BL = 7.2 Tm with only 4.4 g moving mass ensures lightning-fast impulse response – the frequency response shows no sluggish peaks that would indicate excessive moving mass.

The uniform frequency response without dips or peaks in the transmission range confirms the superior quality of the Hexacone diaphragm and the neodymium drive system (BL = 7.2 Tm, Le = 0.11 mH, 1.50 T). A 3" midrange driver with Hexacone diaphragm and neodymium drive that sounds the way it measures – precise, spatially open, with genuine space technology inside. Made in Germany, from the ETON manufactory.

Qts 0.30 / fs 112 Hz / BL 7.2 Tm – Neodym 1.50 T, Le 0.11 mH, Hexacone membrane

The impedance curve of the Symphony II 3-212 shows the behavior of a top-class 3" midrange driver with patented Hexacone diaphragm and neodymium drive: The impedance maximum is at approx. 112 Hz (TSP) – the ideal tuning for use as a midrange driver in 3-way systems with crossover frequencies from approx. 300–500 Hz at the bottom and 3–5 kHz at the top. The Qts value of 0.30 and the equivalent volume of only 0.7 dm³ position the driver for small, sealed midrange chambers or open baffle designs. The force factor BL = 7.2 Tm with a moving mass of only 4.4 g is the decisive drive characteristic: This exceptional ratio enables lightning-fast impulse response and precise transient reproduction that is extraordinary for a 3" midrange driver.

The neodymium magnet with a magnetic flux density of 1.50 T – the highest value in the entire Symphony II range – is the key to this drive ratio in the compact 3" format. The extremely low voice coil inductance of Le = 0.11 mH is the second unique selling point: It ensures a linear impedance curve far into the treble range and enables simple, phase-optimized crossover design without elaborate impedance correction. The smooth impedance curve without secondary resonances demonstrates the mechanical precision of the overhang drive system and the dimensional stability of the Hexacone diaphragm even at high excursions up to Xmax ±2.0 mm electrical.

The 8-ohm design allows easy operation with common HiFi amplifiers. The 25-mm copper voice coil on a Kapton former ensures thermal stability at 40 W (IEC 60268-5). A 3" midrange driver with Hexacone diaphragm, neodymium drive and Le = 0.11 mH that behaves in crossover design exactly as it does in simulation – precise, predictable, Made in Germany.

Product Specification

Dimensions and installation
Overall Diameter

102 mm

Cutout Diameter

78 mm

Total Depth

52 mm

Flange Thickness

5.5 mm

Weight

0.66 kg

Screw Hole Diameter (Screw / Head)

4.3 mm / 8 mm

Terminal (Negative / Positive)

2.8 mm / 4.8 mm

Voice coil
Diameter

25 mm

Height

9 mm

Wire material

Cu

Carrier material

Kapton

Winding layers

2

Magnetic drive
Magnetic flux density

1.50 T

Air gap height

5 mm

Material

Neodymium

Dimensions

65mm x 32 mm

Drive system

Overhang

Ferrofluid

nein

Technical data
Nominal Impedance

Zn = 8 Ohm

DC Resistance

Re = 5.9 Ohm

1 Watt Resonance Frequency

fr = 100 Hz

TSP Resonance Frequency

fr = 112 Hz

Suspension Compliance

Cms = 0.46 mm/N

Mechanical Quality Factor

Qms = 4.23

Electrical Quality Factor

Qes = 0.32

Total Quality Factor

Qts = 0.30

Mechanical Resistance

Rms = 0.79 kg/s

Total Moving Mass (including moving air mass)

Mmd = 4.4 g

Effective Radiating Area

Sd = 34 cm²

Voice Coil Inductance

Le = 0.11 mH

Force Factor

BLxl = 7.2 Tm

Electrical Xmax

+/- 2.0 mm

Mechanical Xmax

+/- 5.3 mm

Equivalent Volume

Vas = 0.7 dm³

Average Sound Pressure Level 1 W / 1 m

89 dB SPL

Power Handling

40 W*


*IEC 60268-5

Downloads

Technical Data Sheet Symphony II 3212

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.