Speaker crossover board stage crossover three crossover 350W Liwei QS-302

Description

Speaker crossover board stage crossover three crossover 350W Liwei QS-302
Crossover model: QS-302, is a treble + midrange + bass three-way divider. This model is a new variety of the Levi brand. The materials are superior and streamlined. The board is 12CM * 8CM small, the power is 350W, and the treble protection sheet is suitable for 4-8 Euros.
Product parameters:
Brand: LI WEI / HUA XIN.
Model: QS-302 (high, middle and low three-way three-way divider).
Dimensions: 12 cm long, 7.7 cm wide, and 4 cm thick.
Frequency: 1KHZ-5KHZ (that is, the bass works at frequencies below 1000HZ, the midrange works at 1000HZ-5000HZ, and the treble works above 5000HZ)
Power: 350W.
Impedance: 4-8 Euro.
Circuit: Designed with 12db / oct, using first-order circuit, treble band overcurrent protection sheet: When the current is greater than a certain value, the protection sheet will be disconnected, the treble does not sound; when the current drops, it will automatically turn on, the treble is normal, so the treble Not being burned out by excessive current, it is a movable protection.
Material: Inductor is made of oxygen-free copper wire, bass coil uses 1.2MM wire diameter, and tweeter coil uses 1.0MM wire diameter; the use of large copper wire has sufficient power to make the bass more powerful; capacitor uses fever-level LW brand non-inductive MKP Capacitor, high withstand voltage up to 400V, to better prevent the peak voltage from crossing and burning the speaker. Reasonable design, exquisite appearance and excellent sound quality.
【Function of Frequency Divider】
The crossover is also called a crossover board, and is often installed in the speaker shell; its function is to divide the total frequency signal from the power amplifier, divide the treble signal to the tweeter unit, and divide the bass signal to the woofer unit. Just like the big lane on the big highway is separated from the small lane and the sidewalk, it will not confuse people and vehicles.
Because the frequency divider is installed inside the speaker shell and cannot be seen outside, many finished speakers are saved by the manufacturer, or a very low-end frequency divider, or one or two capacitors are used instead. If the speaker does not have a crossover, the sound will of course be a bit messy. The professional crossover will make the sound quality of the speaker clearer and distinguish the high and low levels; not only makes the high sound clear, but also strictly prevents low frequency signals from entering and protects the tweeter unit Does not burn out often. To increase the strength of the bass, the woofer can not be connected to the crossover, although it will not be damaged, but due to the entry of high frequency, the bass works in the state of the piston, and the strength is not as effective as the crossover.
How to identify the crossover: In addition to the reasonable circuit design, the material used is the larger the copper wire of the coil, the better, the use of oxygen-free copper wire winding; the higher the voltage resistance of the capacitor, the better, the use of non-inductive Capacitors.