1. The crossover is suitable for triple + mid + bass speakers. The speaker is suitable for 4-8 ohms. The finished products are also mainly used for better coordination. Sound quality, give debugging accessories at the same time of purchase. | 2. The crossover is a popular finished product, which is connected to a variety of speakers. It is suitable for high and medium bass, and the sound quality is the best; But not all speakers and all crossovers are the best fit. After use, there may be too much or too little treble, low frequency and low frequency of the bass, low frequency or too thick bass, AND too much or too little high frequency component in the mid-range. | Triple debugging: 1 - Right after connection, no need to debug. 2: Change the high-mid frequency component of the treble. 3: Change the high-pitched mid and high frequency components. | Midrange debugging: 1: right after connection, no need for debugging. 2: Change the mid-high frequency component of the midrange to increase and decrease. 3: Change the low-mid frequency component of the midrange to increase or decrease. | Bass debugging: 1: right after connection, no need for debugging. 2: Change the low-mid frequency component of the bass. 3: Change the low and mid frequency components of the bass to decrease.

High quality hard plastic enclosure, durable and very nice looking | 3.5inch USB External Floppy Disk Drive, Super slim and lightweight, easy to carry, Perfect for Desktops and Laptops | External Diskette Drive with USB interface, USB 1.1/2.0/3.0 compatible | Read/Write 1.44 MB floppy disk, Plug | Powered directly from the USB port, no external power required, with interference preventer, has a strong anti-interference ability.