Audio Database


A bookshelf speaker system using 419A Biflex.

The BF-419/Malaga was manufactured by Elektri and designed in collaboration with Elektri's research team led by Mr. Beavers, Director of Acoustic Research at ALTEC LTV Research.

The unit uses 419A Biflex which is a 30 cm multi-cone type full range unit.
The diaphragm of this unit is made of a special shape cone in which a 30 cm cone for low frequency and a 16 cm cone for middle frequency are connected by a multi-dumped Cordeson edge to greatly reduce distortion over the entire audible frequency range. The metal radiator of 75 mm in diameter mounted in the center is made of the same materials as Altec's ホーンドラーバー diaphragm. In particular, it is in charge of the highest sound range and realizes a high sound range with excellent diffusion characteristics.
The magnetic circuit uses a large voice coil with a diameter of 75 mm that is edgewise wound with aluminum ribbon wire. The magnet uses a specially selected Alnico V-type magnet. This magnet is unique to Altec and can only be excited up to the specified magnetic flux density, so there is no unevenness in quality.
Aluminum die-cast is used for the frame.

Mounting holes are provided in the front baffle of the enclosure to facilitate installation of the tweeter and network for future upgrades, and it is sealed with a blindfold board.
The enclosure is made of ultra-hard homogen material. The exterior is made of walnut impregnated with oil paint directly imported by Elektri. In addition, the Sa RUNNET is made of special woven Sa RUNNET with special attention paid to high sound transmission and is processed with a design with unique curves of Altec.

Model Rating
Method 2-Way, 1-Speaker, Bass Reflex System, Bookshelf Type
Units Used For all bands : 30 cm multi-cone (419A Biflex)
Impedance 8 Ω
Playback frequency band 30 Hz to 15 kHz
Lowest resonance frequency 39Hz
Output sound pressure level (JIS) 105dB/W
Allowable input 20W
Voice Coil Diameter 75mm
Magnetic flux density 10,400gauss
Magnet assembly 4.4kg
Crossover frequency 1 kHz (Mechanical)
Enclosure Material Rigid Homogen + Special Plywood
Painting Walnut oil finish
External dimensions Width 400x Height 640x Depth 360 mm
Weight 21.8 kg (15 kg enclosure, 6.8 kg unit)

Upgrade plan based on BF-419/Malaga
In the catalog at that time, there was a plan for upgrading the grade.