Orchestra 4-512/C8/25 RP
Orchestra 4-512/C8/25 RP
Orchestra 4-512/C8/25 RP
Orchestra 4-512/C8/25 RP

Features

88 dB SPL
88 dB SPL

Efficiency

80 Hz - 5 kHz
80 Hz - 5 kHz

recommended frequency range

4" | ±100mm
4" | ±100mm

dimensions

Paper
Paper

Membrane material

Phase Plug
Phase Plug

Optimized Treble

±2 mm
±2 mm

linear motion

Features

88 dB SPL
88 dB SPL

Efficiency

80 Hz - 5 kHz
80 Hz - 5 kHz

recommended frequency range

4" | ±100mm
4" | ±100mm

dimensions

Paper
Paper

Membrane material

Phase Plug
Phase Plug

Optimized Treble

±2 mm
±2 mm

linear motion

Vendor:ETON Soundsysteme GmbH

Orchestra 4-512/C8/25 RP

Der ETON Orchestra 4-512 ist ein 4"-Tiefmittelton-Treiber mit Phase Plug für audiophile DIY-Lautsprecher-Projekte, bei denen ein kontrolliertes Abstrahlverhalten im Mittelton und maximale Systemflexibilität gefragt sind. Mit einer Resonanzfrequenz von 80 Hz (TSP), einem Qts von 0,32 und dem kompaktesten Äquivalentvolumen im Orchestra-Sortiment (Vas 3,7 dm³) ist der Orchestra 4-512 für außergewöhnlich kleine Gehäuse in Bassreflex- und geschlossener Bauweise ausgelegt. Der Phase Plug optimiert das Abstrahlverhalten im oberen Mitteltonbereich: Er reduziert thermische Kompression im Bereich der Staubschutzkalotte und ermöglicht eine sauberere Integration in 2-Wege-Systeme mit Trennfrequenzen bis 3,5 kHz – etwas höher als beim Orchestra 4-612 ohne Phase Plug.

Die verrippte Papier-Membran (RP) kombiniert ein warmes, organisches Klangbild mit konstruktiver Steifigkeit: Die Rippenstruktur kontrolliert Partialschwingungen und stabilisiert das Ausschwingverhalten. Die 25-mm-Kupfer-Schwingspule auf Kapton-Träger mit 1,15 T magnetischer Flussdichte sorgt für einen kraftvollen, präzisen Antrieb (BL = 6,0 Tm). Das kompakte Format (122 mm Ø, 66 mm Tiefe, 1,23 kg) ist identisch mit dem Orchestra 4-612 – beide Treiber sind gehäusekompatibel und können im selben Gehäuse eingesetzt werden. Made in Germany, aus der ETON-Manufaktur.

Warum der ETON Orchestra 4-512 für Ihr DIY-Projekt?

  • Phase Plug – kontrolliertes Abstrahlverhalten im Mittelton, Trennfrequenz bis 3,5 kHz möglich – höher als beim Orchestra 4-612 ohne Phase Plug
  • Vas 3,7 dm³ / Qts 0,32 – kleinstes Äquivalentvolumen im Orchestra-Sortiment: Gehäuse ab ca. 2–5 Litern möglich
  • Verrippte Papier-Membran (RP) – neutraler Klangcharakter mit harmonisch warmen Mitten und solidem Bassfundament
  • BL = 6,0 Tm / 1,15 T / Le = 0,35 mH – kraftvoller Antrieb mit niedriger Schwingspuleninduktivität für einfache Weichenauslegung
  • Gehäusekompatibel mit Orchestra 4-612 – identisches Format (122 mm Ø), Wechsel zwischen Phase-Plug- und Kalotten-Variante ohne Umbau
  • 122 mm Ø, 66 mm Tiefe, 1,23 kg – kompaktestes Format im Orchestra-Sortiment für platzsparende 2- und 3-Wege-Gehäuse

Für Projekte, bei denen ein kontrolliertes Abstrahlverhalten, ein kompaktes Format und maximale Systemflexibilität gefragt sind – der ETON Orchestra 4-512 ist die Phase-Plug-Variante des Orchestra 4-612. Made in Germany, aus der ETON-Manufaktur.

Phase Plug: Controlled midrange radiation characteristics, crossover frequency up to 3.5 kHz possible – more precise room imaging and a wider sweet spot than without a Phase Plug.

Phase Plug: Controlled midrange radiation characteristics, crossover frequency up to 3.5 kHz possible – more precise room imaging and a wider sweet spot than without a Phase Plug.

Vas 3.7 dm³ / Qts 0.32 – smallest equivalent volume in the Orchestra range: Enclosures starting at approximately 2 liters are possible, flexible for both bass reflex and sealed enclosure designs.

Vas 3.7 dm³ / Qts 0.32 – smallest equivalent volume in the Orchestra range: Enclosures starting at approximately 2 liters are possible, flexible for both bass reflex and sealed enclosure designs.

Housing compatible with Orchestra 4-612: identical format (122 mm Ø) – switch between phase plug and dome variant without modification, maximum project flexibility.

Housing compatible with Orchestra 4-612: identical format (122 mm Ø) – switch between phase plug and dome variant without modification, maximum project flexibility.

BL = 6.0 Tm / 1.15 T / Le = 0.35 mH / 88 dB: Powerful driver, simple crossover design – neutral sound character with harmonically warm midrange. Made in Germany.

BL = 6.0 Tm / 1.15 T / Le = 0.35 mH / 88 dB: Powerful driver, simple crossover design – neutral sound character with harmonically warm midrange. Made in Germany.

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90,00 EURUnit price(90,00 EUR each)

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2-year manufacturer's warranty

Made in Germany

Phase Plug for controlled radiation behavior – usable from 75 Hz to 3.5 kHz

The frequency response of the Orchestra 4-512 showcases the performance of a 4-inch mid-bass driver with Phase Plug: a smooth, controlled amplitude curve from approximately 75 Hz to 3.5 kHz – with 88 dB efficiency and a stable level response across the entire operating range. The Phase Plug is the key differentiating feature compared to the Orchestra 4-612 without Phase Plug: it optimizes radiation behavior in the upper midrange and enables a slightly higher crossover frequency (up to 3.5 kHz instead of 3 kHz) – a benefit for designs where controlled, low-dispersion radiation and precise spatial imaging are top priorities. The ribbed paper cone (RP) additionally controls spurious harmonic vibrations and stabilizes transient response.

Particularly relevant for DIY loudspeaker developers: The usable operating range of 75 Hz to 3.5 kHz makes the Orchestra 4-512 the most versatile Phase Plug-equipped driver in the Orchestra product lineup.

In the 2-Wege-System it handles the full low and midrange up to approximately 3–3.5 kHz and is paired directly with a tweeter – the compact Vas of 3.7 dm³ enables cabinet sizes starting at approximately 2–5 liters.

In the 3-Wege-System it functions as a dedicated midrange driver between a woofer (crossover starting at approximately 200–400 Hz) and a tweeter (crossover at 3–3.5 kHz). Both drivers – the 4-512 and 4-612 – are enclosure-compatible and can be used in the same cabinet.

The flat frequency response with no dips or peaks in the operating range confirms the quality of the paper RP cone and drive system (BL = 6.0 Tm, 1.15 T). A 4-inch driver with Phase Plug that sounds exactly as it measures – neutral, controlled, precise. Made in Germany, at the ETON manufacturing facility.

Qts 0.32 / fs 80 Hz / Vas 3.7 dm³ – Phase plug for controlled radiation behavior up to 3.5 kHz

The impedance curve of the Orchestra 4-512 shows the performance of a 4" mid-bass driver with Phase Plug and the most compact equivalent volume in the Orchestra product line: The impedance maximum is at approximately 80 Hz (TSP) – slightly higher than with the Orchestra 4-612 without Phase Plug (68 Hz). The Qts value of 0.32 is identical to the 4-612 and offers the same flexibility for enclosure design: Both bass reflex and closed enclosures are possible. The equivalent volume of just 3.7 dm³ is the smallest in the entire Orchestra product line and enables exceptionally compact enclosures starting at approximately 2–5 liters. The Phase Plug reduces thermal compression in the diaphragm center and optimizes radiation behavior in the upper midrange – the impedance behavior itself is nearly identical to the 4-612.

Above the resonance frequency, the driver behaves electrically stably: The impedance only increases minimally at high frequencies due to the voice coil inductance (Le = 0.35 mH) – nearly identical to the 4-612 (Le = 0.36 mH). Both drivers can be designed using the same basic principles and are enclosure-compatible. The 8-ohm design allows trouble-free operation with standard HiFi and multi-channel amplifiers.

The cleanly defined impedance maximum without secondary resonances confirms the mechanical precision of the overhung drive system and the quality of the suspension. A 4" driver that behaves exactly the same in enclosure calculations as it does in simulations – reproducible, reliable, Made in Germany.

Product Specification

Dimensions and installation
Overall Diameter

122 mm

Mounting Hole Diameter

96 mm

Overall Depth

66 mm

Flange Thickness

6 mm

Weight

1,23 kg

Screw Hole Diameter (Screw / Head)

4,5 mm / 8 mm

Terminal (Negative / Positive)

2,8 mm / 4,8 mm

Voice coil
Diameter

25 mm

Height

10 mm

Wire material

Cu

Carrier material

Kapton

Winding layers

2

Magnetic drive
Magnetic flux density

1.15 T

Air gap height

6 mm

Material

Ferrite

Dimensions

90 mm x 36 mm

Drive system

Overhang

Ferrofluid

nein

Technical data
Nominal Impedance

Zn = 8 Ohm

DC Resistance

Re = 5.8 Ohm

1 W Resonance Frequency

fr = 78 Hz

Resonance Frequency (TSP)

fr = 80 Hz

Suspension Compliance

Cms = 0.86 mm/N

Mechanical Quality Factor

Qms = 6.65

Electrical Quality Factor

Qes = 0.34

Total Quality Factor

Qts = 0.32

Mechanical Resistance

Rms = 0.38 kg/s

Total Moving Mass (Including Moving Air Mass)

Mmd = 4.5 g

Effective Radiating Area

Sd = 55 cm²

Voice Coil Inductance

Le = 0.35 mH

Force Factor

BLxl = 6.0 Tm

Electrical Xmax

+/- 2.0 mm

Mechanical Xmax

+/- 6.8 mm

Equivalent Volume

Vas = 3,7 dm³

Average Sound Pressure Level 1 W / 1 m

88 dB SPL

Power Handling

40 W*


*IEC 60268-5

Downloads

Technical Data Sheet Orchestra 4512

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