Audio Database
12TRXB
Commentary

A 30cm3-way coaxial type unit combining a double-cone type speaker SP12B and a horn type tweeter T35.

Built-in special high-pass filter and level control.

It was 16 Ω specification around 1970 and 8 Ω specification around 1972.

You can combine it with the separately sold Midrange Kit BB4.
Note that if you combine BB4 with 12 trxb, you must also use an X36 network.

Model Rating
Type 30cm3-way coaxial speaker unit
Frequency characteristic 35 Hz to 20 kHz
fo 50Hz
Crossover frequency 2 kHz (Mechanical)
3.5 kHz (electrical)
Max Input 60W
Impedance 16 Ω (around 1970)
8 Ω (around 1972)
Output sound pressure level 101dB/W
Magnet Low Band : 0.6 kg Ceramic
High Pass : 0.09 kg Alnico V
Baffle opening diameter 27.9cm
Enclosure Minimum Volume 100 liters
External dimensions Diameter 311x Depth 178 mm
Weight 6.4kg
Sold Separately Midrange Kit BB4 (¥ 66,000)
Crossover Network X36 (¥ 8,000)