Second, what speakers are loud? The horns in rural areas are loud, strong and small. Four speakers can fully meet the needs of 10,000 people, and one person can move four speakers. . . Ha ha, just kidding, the sound of the speaker is either loud or loud, depending on the sensitivity. A speaker with a sensitivity of100dB 300W and a speaker with a sensitivity of 95dB 600 are definitely larger than the latter when the same power is input. The power of sensitivity 95 is useless even if it is large. Power is only the maximum or rated power of the speaker, and the latter is only greater than the former! The reason is that the car body is light and the car with small displacement is not necessarily slower than the car with large displacement.
Third, the speakers themselves are made of wood, and even the best speakers can't stand being transported back and forth without any protection. So I suggest you customize a shockproof air box, even if the box falls directly from the car, the speaker inside will not be damaged at all. You can go and see a serious speaker rental company. Basically, each pair of speakers is packed in an air box, after all, it is for your own use! There is no harm in investing more in this area. .
Fourthly, the quality of domestic first-line brands' speakers is also very good, because they are all imported units (speakers), such as T.D (Tang Long Taiji) LAX (Ruifeng) B3 (Sanki Beta Sri) Acer's Soundbullet (Eastsound) and so on. They are all well-known brands, but the prices of these brands' speakers are expensive, because, firstly, and secondly, the prices of speakers have increased from factory to retail. And the speakers of these brands are about 3000~6000/ piece, so if the budget is limited, you can try to increase the number of low-priced speakers or do frequency division to make up for it. . . (Explain frequency division, add a group of ultra-low speakers on the basis of ordinary full-range speakers, and divide the frequency with a frequency divider. Full-range speakers are responsible for the medium and high tones, and the low frequency or low frequency part is compensated by the subwoofer, so the efficiency of the whole speaker system will be greatly improved! )
The above is purely a personal opinion, for reference only, and I hope it will help you. . .