Symphony II 5-312/C8/25 HEX

The ETON Symphony II 5-312 is a top-class 5" midwoofer driver for audiophile DIY loudspeaker projects and speaker manufacturers that demand Hexacone cone technology, a phase plug for controlled dispersion behavior, and genuine bass extension down to below 50 Hz. The heart of the Symphony II 5-312 is the combination of the patented multilayer Hexacone cone and the phase plug in an open design: The Hexacone cone provides exceptional cone stiffness with low moving mass (Mmd = 9.4 g) and an effective radiating area of Sd = 80 cm². The phase plug actively optimizes dispersion behavior in the upper frequency range: It ensures uniform sound radiation across the entire cone surface, improves air circulation in the pole piece area, and enables crossover frequencies up to approx. 2–3 kHz with controlled, low-beaming dispersion behavior.

With a resonance frequency of 54 Hz (TSP), a Qts of 0.44, and an equivalent volume of 8.4 dm³, the Symphony II 5-312 is designed for bass-reflex enclosures from approx. 10–20 liters tuned around 40–50 Hz – for bass extension down to below 40 Hz in a compact 5" format. The mechanical Xmax of ±7.5 mm provides a generous safety margin at 50 W power handling (IEC 60268-5). With a total diameter of 148 mm and a weight of 1.28 kg, the Symphony II 5-312 is the phase plug variant in the 5" format – for projects that demand Hexacone cone quality, genuine bass extension, and controlled dispersion behavior up to the crossover frequency. Made in Germany, from the ETON factory.

Why the ETON Symphony II 5-312 for your project?

• Patented multilayer Hexacone cone + phase plug: Aerospace technology meets controlled dispersion behavior – dimensionally stable at high excursions, linear at 50 W as at 1 W
• Phase plug: uniform dispersion behavior up to 2–3 kHz: reduced thermal compression and phase-optimized tweeter integration for a wide sweet spot
• BL = 5.7 Tm / fs 54 Hz (TSP) / Sd = 80 cm² / Xmax ±7.5 mm mechanical: powerful motor with generous cone area for bass extension down to below 40 Hz in a bass-reflex enclosure
• Qts 0.44 / Vas 8.4 dm³: designed for bass-reflex enclosures from approx. 10–20 liters – compact 2-way loudspeakers with genuine bass extension and phase plug
• 88 dB / 50 W (IEC 60268-5) / Le = 0.45 mH / Ferrite 1.15 T: high efficiency and thermal power handling for high-SPL reproduction in long-term operation
• 148 mm Ø, 68 mm depth, 1.28 kg: compact 5" format for 2-way and 3-way systems with phase plug and genuine bass extension. Made in Germany.

For DIY loudspeaker projects and speaker manufacturers that demand Hexacone cone technology, a phase plug for controlled dispersion behavior, and genuine bass extension in a compact 5" format – the ETON Symphony II 5-312. Made in Germany, from the ETON factory.