Difference between revisions of "Scandyna Loudspeaker"
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__NOTOC__ | __NOTOC__ | ||
| − | == | + | == Data == |
| − | {{ | + | {{navigation}} |
| − | ''' | + | '''General''' |
| − | * | + | * Manufacturer: Scan-Dyna (also spelled Scandyna or scan-dyna). |
| − | * | + | * Model: A 25 X (in brochures/price lists also with hyphen A-25 X) |
| − | * | + | * Years of construction: 1969 - 1972 |
| − | * | + | * Manufactured in: Denmark |
| − | * | + | * Colour: White; Walnut |
| − | * | + | * Dimensions: H 50.0 x W 29.0 x D 25.0 cm |
| − | * | + | * Volume: 25 litres |
| − | * | + | * Weight: 9 Kg |
| + | * Original price approx.: not yet found | ||
| − | ''' | + | '''Technical Data''' |
| − | * | + | * Type: Aperiodic (Semi-open; Also called "acoustic resistor" or "resistive port/vent"). |
* Chassis: 2 | * Chassis: 2 | ||
| − | + | Tweeter dome SEAS H-087, 6 Ohm (measured: 4.8 Ohm) | |
| − | ** | + | **woofer SEAS H-336 (according to surround) / type 25TV-EM (according to label), 4 Ohm |
| − | + | power handling (nominal/music): 35 / 90 Watt | |
| − | + | efficiency: 88 dB at 1 Watt; 96 dB at 6.3 Watt | |
| − | * | + | * Frequency response: 32-20,000 Hz |
| − | * | + | * Transient response: (for multi-driver LS). |
| − | * | + | * Impedance: 4 Ohm |
| − | ''' | + | '''Special Features''' |
| − | * | + | * Height adjustment in 5 positions for listening room adaptation with the following features: |
| + | ** 1) Low boost. | ||
| + | ** 2) Linear frequency response. | ||
| + | ** 3) Weak damping (Normal position). | ||
| + | ** 4) Slightly stronger damping for "hard" rooms. | ||
| + | ** 5) Strong damping. | ||
| + | * Aperiodic | ||
| + | Manufacturer's Comment (from article by J. Gordon Holt, Dec. 1, 1969; about the first A25 version) | ||
| + | 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 | ||
| + | Dynaudio called this design "Variovents" and Scan-Speak called it "Flow Resistance Vent". | ||
| + | == Comments == | ||
| + | Other models of the same series: | ||
| − | == | + | == Pictures == |
| − | |||
| − | + | <gallery> | |
| + | A25.jpg | ||
| + | A25-A35-XO-map.gif | ||
| + | </gallery> | ||
| − | == | + | == Reports == |
== Links == | == Links == | ||
| − | [[ | + | [[Category:Loudspeaker]] |
| + | |||
| + | http://hifigoteborg.se/about%20scan%20dyna.htm | ||
| + | |||
| + | [[https://diyaudioprojects.com/Technical/Aperiodic/ | ||
| + | |||
| + | https://www.stereophile.com/content/dynaco-25-loudspeaker | ||
Latest revision as of 09:25, 13 February 2021
Data[edit]
General
- Manufacturer: Scan-Dyna (also spelled Scandyna or scan-dyna).
- Model: A 25 X (in brochures/price lists also with hyphen A-25 X)
- Years of construction: 1969 - 1972
- Manufactured in: Denmark
- Colour: White; Walnut
- Dimensions: H 50.0 x W 29.0 x D 25.0 cm
- Volume: 25 litres
- Weight: 9 Kg
- Original price approx.: not yet found
Technical Data
- Type: Aperiodic (Semi-open; Also called "acoustic resistor" or "resistive port/vent").
- Chassis: 2
Tweeter dome SEAS H-087, 6 Ohm (measured: 4.8 Ohm)
- woofer SEAS H-336 (according to surround) / type 25TV-EM (according to label), 4 Ohm
power handling (nominal/music): 35 / 90 Watt efficiency: 88 dB at 1 Watt; 96 dB at 6.3 Watt
- Frequency response: 32-20,000 Hz
- Transient response: (for multi-driver LS).
- Impedance: 4 Ohm
Special Features
- Height adjustment in 5 positions for listening room adaptation with the following features:
- 1) Low boost.
- 2) Linear frequency response.
- 3) Weak damping (Normal position).
- 4) Slightly stronger damping for "hard" rooms.
- 5) Strong damping.
- Aperiodic
Manufacturer's Comment (from article by J. Gordon Holt, Dec. 1, 1969; about the first A25 version) 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 Dynaudio called this design "Variovents" and Scan-Speak called it "Flow Resistance Vent".
Comments[edit]
Other models of the same series:
Pictures[edit]
Reports[edit]
Links[edit]
http://hifigoteborg.se/about%20scan%20dyna.htm