Audio Database

Image of the TM 1201
Commentary

Midbus unit of Technical Audio Devices (TAD).

Carbon graphite is used for the diaphragm, which has excellent characteristics as a vibration system material such as high Young's modulus and moderate internal loss.
The cone shape is derived from optical measurement using a laser and careful hearing, and clear sound quality with little split vibration of the cone is achieved.

In addition to a voice coil bobbin with excellent heat resistance, a heat-resistant edgewise long voice coil with a heat-resistant coating is used for the drive system.
In addition, low distortion and high input resistance have been realized by introducing a magnetic circuit using ferrite magnet with 14,500 gauss magnetic flux density, new material and new shape for magnetic pole, and magnetic flux short circuit.

Model Rating
Type Mid-range unit
Voice coil impedance 8 Ω
Lowest resonance frequency 52Hz
Playback frequency band 200 Hz to 3 kHz
Rated input 150W
Max Input 300W
Output sound pressure level 100dB/W/m
Equivalent Mass (infinite baffle) 60gr
Qo 0.16
Total flux 324,000maxwell
Magnetic flux density 14,500gauss
Baffle opening 276mm
Mounting Dimensions 293 mm (6-hole Type)
External dimensions Diameter φ 318x Depth 110 mm
Weight 11kg
Attachment 6 mounting screws (M5x40)
Washer x6
Nut x6
Grain Nut x6
Sealed Packing (1/3) x3