1. As for the style: the main characteristics of the FAST-12 sound are high resolution, fine and transparent mid and high frequencies, good dynamics, very clean sound, suitable for large cabinets of 150 liters or more, and it is also very good with our bass speaker W15.

2. Regarding the design: the full-range speaker does not need crossover, one-point sound, no phase distortion, and the sound is more natural and pure. Our full range speakers have tried to tune the sound to be very balanced. Adding a notch filter is not recommended. We believe that the limiter changes the waveform of the speaker forcibly and changes the sound of the speaker. The inductance, resistance and capacitance of the notch are subjected to it will cause sound stains and affect the efficiency of the speaker. The full-range speaker is easy to play, and the pure sound that the signal path brings doesn’t need to be complicated. It is better to change the sound of the speaker through physical adjustment rather than circuit. Of course, the overall quality can be improved by upgrading the speaker.

*** The core material, the paper cone, is the exclusively developed pulp, with added natural plant fibers and post-strengthening treatment so that the stiffness and damping properties reach the best state.

*** The paper cone hanging fabric edges and elastic waves are all DuPont products, and the fabric edge coating damping is the Japanese chemical industry. It will not age in 20 years and has a long service life.

*** The magnetic circuit uses Y35 high performance permanent magnet ferrite. After the external magnetizing field disappears, this kind of ferrite material can still retain a strong constant remanence for a long time, and can be used to generate a stable and constant magnetic field. The working temperature is 400 degrees Celsius without demagnetization, the Curie temperature is 450-460 degrees Celsius, the performance is very stable, and the cost performance is extremely high. Dual magnetic structure ensures strong magnetic force and the sensitivity is up to 94dB.

*** The voice coil is made of Kabutong skeleton aluminum wire, together with the double cone structure, the resolution is very good, the high frequency reaches 20K (3dB or so).

3 about parameters: some friends like to study parameters and curves, but few people really understand them, and talk about parameters with many friends, but many of them have completely wrong understanding of parameters, such as sensitivity . Sensitivity is just a matter of acoustic pressure efficiency and has nothing to do with good thrust. High sensitivity does not mean good thrust. The internal resistance of the speakers is different, and the control requirements for the power amplifier are different. Also, the understanding of the curve is very shallow and it is almost impossible to understand the sound through the curve. “It’s always shallow on paper”, parameters are always numbers and must be listened to. Sound is a sound wave generated by the vibration of an object. It is a fluctuating phenomenon that is transmitted through a medium (air or solid, liquid) and can be detected by human or animal hearing organs. Sound is a kind of auditory art, and the parameters on paper cannot express the characteristics of sound cannot express art. A speaker that really needs to test full parameters may need to be as thick as a book. Still, it can’t express 10% of the speaker’s sound characteristics, let alone live up to the art. We produce and develop loudspeakers without regard to parameters. Everything is based on the sense of hearing. Through design, material mix and fit, we can achieve a hearing sensation that satisfies the characteristics. The final shape is completed and tested in the anechoic room. What are the parameters? That’s what it is, and it won’t modify the layout for bad parameters.