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| __NOTOC__ | | __NOTOC__ |
− | == Data == | + | == Daten == |
− | {{navigation}} | + | {{Navigation}} |
− | '''General''' | + | '''Allgemein''' |
− | * Manufacturer: Scan-Dyna (also spelled Scandyna or scan-dyna). | + | * Hersteller: Scan Dyna |
− | * Model: A 25 X (in brochures/price lists also with hyphen A-25 X) | + | * Modell: A-25x |
− | * Years of construction: 1969 - 1972 | + | * Baujahre:1969 - 1972 |
− | * Manufactured in: Denmark | + | * Hergestellt in:Dänemark |
− | * Colour: White; Walnut | + | * Farbe: weiß ; braun |
− | * Dimensions: H 50.0 x W 29.0 x D 25.0 cm
| + | * Abmessungen: 50cmX29cmX25cm 25 liter |
− | * Volume: 25 litres | + | * Gewicht: noch nicht gefunden |
− | * Weight: 9 Kg | + | * Neupreis ca.: noch nicht gefunden |
− | * Original price approx.: not yet found | |
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− | '''Technical Data''' | + | '''Technische Daten''' |
− | * Type: Aperiodic (Semi-open; Also called "acoustic resistor" or "resistive port/vent"). | + | * Bauart: Geschlossen ; halboffen ; eine Art von Variovent |
| * Chassis: 2 | | * Chassis: 2 |
− | Tweeter dome SEAS H-087, 6 Ohm (measured: 4.8 Ohm)
| + | **Hochtonkalotte SEAS H-087 , 6 Ohm ( gemessen: 4,8 Ohm ) |
− | **woofer SEAS H-336 (according to surround) / type 25TV-EM (according to label), 4 Ohm | + | **Tieftöner SEAS H-336 ( laut Sicke ) / Typ 25TV-EM ( laut Aufkleber ) , 4 Ohm |
− | power handling (nominal/music): 35 / 90 Watt
| + | * Belastbarkeit (Nenn-/Musikb.): 35/60 |
− | efficiency: 88 dB at 1 Watt; 96 dB at 6.3 Watt
| + | * Wirkungsgrad: 89db ; 96db/6,3W |
− | * Frequency response: 32-20,000 Hz | + | * Frequenzgang:32-20.000 |
− | * Transient response: (for multi-driver LS). | + | * Übergangsbereiche: (für LS mit mehreren Chassis) |
− | * Impedance: 4 Ohm | + | * Impedanz:4 Ohm |
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− | '''Special Features''' | + | '''Besondere Ausstattungen''' |
− | * Height adjustment in 5 positions for listening room adaptation with the following features: | + | * Variovent-System |
− | ** 1) Low boost.
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− | ** 2) Linear frequency response.
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− | ** 3) Weak damping (Normal position).
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− | ** 4) Slightly stronger damping for "hard" rooms.
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− | ** 5) Strong damping.
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− | * Aperiodic
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− | Manufacturer's Comment (from article by J. Gordon Holt, Dec. 1, 1969; about the first A25 version)
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− | The aperiodic design is not a bass-reflex approach, since there is no acoustic output through the port. The characteristics of the "plug" in the port are quite critical, necessitating individual adjustment of each system. This added acoustical impedance damps the woofer, improving its response to transient signals. Examination of the woofer cone motion shows that, with this aperiodic design (on which patents are pending), the cone follows the input signal all the way down to DC with far greater precision than is the case with either bass-reflex or acoustic-suspension designs.-Dynaco
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− | Dynaudio called this design "Variovents" and Scan-Speak called it "Flow Resistance Vent".
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− | == Comments ==
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− | Other models of the same series:
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− | == Pictures == | + | == Bemerkungen == |
| + | Weitere Modelle der gleichen Serie: |
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− | <gallery>
| + | == Bilder == |
− | A25.jpg
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− | A25-A35-XO-map.gif
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− | </gallery>
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− | == Reports == | + | == Berichte == |
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| == Links == | | == Links == |
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− | [[Category:Loudspeaker]] | + | [[Kategorie:Lautsprecher]] |
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− | http://hifigoteborg.se/about%20scan%20dyna.htm
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− | [[https://diyaudioprojects.com/Technical/Aperiodic/
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− | https://www.stereophile.com/content/dynaco-25-loudspeaker
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