Arcosia 7
Arcosia 7
Arcosia 7
Arcosia 7

Features

89 dB SPL
89 dB SPL

efficiency

50 Hz - 3 kHz
50 Hz - 3 kHz

recommended frequency range

7" | ±180mm
7" | ±180mm

dimensions

magnesium
magnesium

membrane material

±5.5 mm
±5.5 mm

linear motion

Features

89 dB SPL
89 dB SPL

efficiency

50 Hz - 3 kHz
50 Hz - 3 kHz

recommended frequency range

7" | ±180mm
7" | ±180mm

dimensions

magnesium
magnesium

membrane material

±5.5 mm
±5.5 mm

linear motion

Vendor:ETON Soundsysteme GmbH

Arcosia 7

Der ETON Arcosia 7 ist ein 7"-Midwoofer mit echter Tiefgangkompetenz und präziser Systemberechenbarkeit – in der klassischen Ausführung mit Staubschutzkalotte. Mit einer Resonanzfrequenz von 35 Hz (TSP), einem Qts von 0,32 und einem Äquivalentvolumen von 32,9 dm³ liefert er die TSP-Basis für eine präzise Gehäuseauslegung in Bassreflex- oder geschlossenen Konstruktionen – berechenbar, reproduzierbar, ohne Kompromisse.

Im Vergleich zum Arcosia 7 Phase Plug bietet die klassische Ausführung ein etwas breiteres Abstrahlverhalten im oberen Mitteltonbereich – ein Vorteil für Konstruktionen, bei denen ein großzügiger Sweet Spot und eine homogene Energieabgabe im Raum im Vordergrund stehen. Ferrit-Antrieb im Überhang-System, 32-mm-Schwingspule auf Glasfaser-Träger, Xmax elektrisch ±5,5 mm. Erhältlich in Transparent (7208) und Schwarz (7218). Made in Germany, aus der ETON-Manufaktur.

Warum der ETON Arcosia 7 für Ihr DIY-Projekt?

  • ✦ Klassische Staubschutzkalotte – breiteres Abstrahlverhalten im Mittelton, großzügiger Sweet Spot
  • ✦ Resonanzfrequenz 35 Hz / Qts 0,32 – ideal für Bassreflex- und geschlossene Gehäuse, präzise berechenbar
  • ✦ Xmax ±5,5 mm elektrisch / ±9,5 mm mechanisch – hoher Linearhub für verzerrungsarme Basswiedergabe
  • ✦ 32-mm-Schwingspule auf Glasfaser-Träger – thermisch belastbar, mechanisch stabil
  • ✦ Vas = 32,9 dm³ – kompaktes Äquivalentvolumen für einen 7"-Treiber, kleinere Gehäuse möglich
  • ✦ Zwei Varianten: Transparent (7208) und Schwarz (7218) – für offene und geschlossene Gehäusekonzepte

Ob präzises 2-Wege-System, anspruchsvolles 3-Wege-Konzept oder audiophiles DIY-Lautsprecher-Projekt – der ETON Arcosia 7 setzt den Maßstab für das, was ein 7"-Midwoofer aus einer Lautsprecher-Manufaktur leisten kann. Für Projekte, bei denen ein optimiertes Mittelton-Abstrahlverhalten im Vordergrund steht, empfiehlt sich der Arcosia 7 mit Phase Plug.

Dust cap dome instead of Phase Plug: Wider midrange dispersion, generous sweet spot – for applications where homogeneous room sound dispersion is the top priority.

Dust cap dome instead of Phase Plug: Wider midrange dispersion, generous sweet spot – for applications where homogeneous room sound dispersion is the top priority.

Xmax ±5.5 mm electrical / ±9.5 mm mechanical – high linear excursion for a 7" driver that stays low-distortion and controlled even at high sound levels and low frequencies.

Xmax ±5.5 mm electrical / ±9.5 mm mechanical – high linear excursion for a 7" driver that stays low-distortion and controlled even at high sound levels and low frequencies.

BL = 8.0 Tm at Mmd = 16.3 g: Powerful, precise drive with fast impulse response – the foundation for sculpted bass and clean midrange transition.

BL = 8.0 Tm at Mmd = 16.3 g: Powerful, precise drive with fast impulse response – the foundation for sculpted bass and clean midrange transition.

Qts 0.32 / Vas 32.9 dm³: Flexible for bass reflex and sealed enclosures – compact equivalent volume for a 7-inch driver, smaller enclosures possible

Qts 0.32 / Vas 32.9 dm³: Flexible for bass reflex and sealed enclosures – compact equivalent volume for a 7-inch driver, smaller enclosures possible

Color
Color: transparent
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530,00 EURUnit price(530,00 EUR each)

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2-year manufacturer's warranty

Made in Germany

Wide radiation pattern in the midrange – usable from 40 Hz to 2.5 kHz

The frequency response of the Arcosia 7 features a smooth, controlled amplitude curve from approx. 40 Hz to 2.5 kHz – with 89 dB efficiency and a stable level profile across the entire operating range. Compared to the Arcosia 7 Phase Plug, the classic version with a dust cap has a slightly wider radiation pattern in the upper midrange: Energy is radiated more evenly into the listening space, creating a more expansive sweet spot and more uniform sound distribution throughout the listening area.

Particularly relevant for DIY speaker builders: The usable operating range up to approx. 2.5 kHz allows direct pairing with tweeters with crossover frequencies starting at 2 kHz – perfect for demanding 2-way speaker designs. In 3-way systems, the Arcosia 7 handles the midrange from approx. 200–300 Hz and passes the low-frequency signals to a dedicated subwoofer or woofer. The typical 7" cone assembly activates above approx. 2 kHz – so the crossover frequency should not be selected significantly higher.

The flat, consistent frequency response with no dips or peaks across its operating range confirms the quality of the drive unit and suspension. A driver that sounds exactly as it measures – crafted at the ETON factory in Germany.

Qts 0.32 – precisely calculable for bass reflex and closed enclosures

The impedance curve of the Arcosia 7 shows the behavior of a carefully tuned 7" midwoofer: The impedance peak occurs at the resonant frequency of approximately 35 Hz (TSP) – exceptionally low for a driver of this size class. The Qts value of 0.32 clearly places the Arcosia 7 in the bass reflex tuning range, but it is also suitable for sealed enclosures with the corresponding volume. Compared to the Arcosia 7 Phase Plug (Qts 0.31, fs 36 Hz), the differences are minimal – both drivers can be designed using the same basic principles.

Above resonance, the driver behaves electrically stably: Impedance rises moderately toward high frequencies due to the voice coil inductance (Le = 0.87 mH) – a value expected and easily manageable for a midwoofer with a 32-mm voice coil. The 8-ohm design allows trouble-free operation with standard HiFi and multi-channel amplifiers, in both passive and active setups.

The cleanly defined impedance peak without side resonances confirms the mechanical precision of the overhung drive system and the quality of the suspension. A driver that behaves exactly the same in enclosure calculations as it does in simulations – reproducible, reliable, Made in Germany.

Product Specification

Dimensions and installation
Total diameter

181 mm

Cutout diameter

150 mm

Total depth

96.6 mm

Flange thickness

6 mm

Weight

2.60 kg

Screw hole diameter (screw / head)

5 mm / 9 mm

Terminal (Negative / Positive)

4,8 mm / 6,3 mm

Voice coil
Diameter

32 mm

Height

17 mm

Wire material

CU

Support material

Fiberglass

Winding layers

1

Magnetic drive
Magnetic flux density

1.26 T

Air gap height

6 mm

Material

Ferrite

Dimensions

121 mm x 50 mm x 20 mm

Drive system

Overhang

Ferrofluid

nein

Technical data
Nominal Impedance

Zn = 8 Ohm

DC Resistance

Re = 6.5 Ohm

1 W Resonance Frequency

fr = 31 Hz

Thiele-Small Resonance Frequency

fr = 35 Hz

Suspension Compliance

Cms = 1.25 mm/N

Mechanical Quality Factor

Qms = 5.88

Electrical Quality Factor

Qes = 0.34

Total Quality Factor

Qts = 0.32

Mechanical Resistance

Rms = 0.67 kg/s

Total Moving Mass (including moving air mass)

Mmd = 16.3 g

Effective Radiating Area

Sd = 137 cm²

Voice Coil Inductance

Le = 0.87 mH

Force Factor

BLxl = 8.0 Tm

Electrical Xmax

+/- 5.5 mm

Mechanical Xmax

+/- 9.5 mm

Equivalent Volume

Vas = 32.9 dm³

Average Sound Pressure Level 1 W / 1 m

89 dB SPL

Power Handling

100 W*


*IEC 60268-5

Downloads

Technical Data Sheet Arcosia 7208 (transparent)

Technical Data Sheet Arcosia 7218 (black)

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