ALTEC LANSING 755E/Medina
¥ 36,800 (1 unit, around 1970)
Commentary
This is a speaker system that uses the 755 series, nicknamed "Pancake".
The 755E/Medina was produced by Elektri, an agent of Altec at that time, under the guidance of ALTEC Sound Laboratory L. T. V Research, and is a model for the Japanese market.
The unit is equipped with the 755 series 20 cm cone type full range unit 755E.
In the 755E, a cone with an effective diameter of 17 cm and a central dome are pressed together, and anti-resonance strain is eliminated by solving the poor connection between the cone and the central dome. In addition, a cloth edge with good linearity is adopted in the peripheral edge part, and it is lightly damped with bis colloid.
The drive part uses a large voice coil of 50 mm diameter with aluminum ribbon wire wound edgewise and an in DACS V-type magnet produced exclusively for 755E. This magnet is excited only up to the specified magnetic flux density, so there is no unevenness in the product.
Aluminum die-cast is used for Holem.
The enclosure is made of hard homogen and special plywood. The internal structure is a modified distributed port type and is designed with special attention paid to the internal pressure treatment method based on the results of various measurement data.
The exterior has an oil finish using a walnut thrust plate.
Model Rating
Method | 1-Way, 1-Speaker, Basref System, Bookshelf Type |
Units Used | All Band : 20 cm Cone Type (755E) |
Impedance | 8 Ω |
Playback frequency band | 40 Hz to 15 kHz |
Lowest resonance frequency | 52Hz |
Output sound pressure level (JIS) | 100dB/W |
Allowable input | 15W |
Voice Coil Diameter | 50mm |
Magnetic flux density | 9,000gauss |
Enclosure Material | Rigid Homogen + Special Plywood |
Painting | Walnut oil finish |
External dimensions | Width 358x Height 596x Depth 280 mm |
Weight | 14kg |
Upgrade plan based on 755E/Medina
The catalog at that time had an upgrade plan based on 755E/Medina.
-
Plan with a low-frequency unit
It is a plan with 416A or 414A added for low band.
Crossover frequency : 300 to 800 Hz
Compatible enclosures : 846A, 843B, 848A, 847A, 825A -
Plan with a high-frequency unit
It is a plan with 3000H added for high frequency.
Crossover frequency : 3k-5kHz