Audio Database
12TRX
Commentary

A 30 cm coaxial type unit combining a double-cone type speaker SP12 and a horn type tweeter T35.

A crossover network X36 and a level control AT37 are incorporated.

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

You can combine it with the separately sold Midrange Kit BB4.

Model Rating
Type 30cm3-way coaxial speaker unit
Frequency characteristic 30 Hz to 20 kHz
fo 45Hz
Crossover frequency 2 kHz (Mechanical)
3.5 kHz (electrical)
Max Input 80W
Impedance 16 Ω (around 1970)
8 Ω (around 1972)
Output sound pressure level 102dB/W
Magnet Low Band : 1.4 kg Alnico V
High Pass : 0.2 kg Alnico V
Baffle opening diameter 27.9cm
Enclosure Minimum Volume 113 liters
External dimensions Diameter 311x Depth 191 mm
Weight 9.5kg
Sold Separately Midrange Kit BB4 (¥ 66,000)