According to the original audio system of the car, it is not an easy task to choose cost-effective audio equipment, especially if the owner does not understand the change in the effect of car audio modification. Therefore, the responsibility also belongs to the store of the sound change store, according to the owner's consumption level and hobbies to evaluate the matching of a full set of audio systems, it is best that the owner can compare the sound of various brands of products according to the budget, and choose their favorite sound. Instead of listening to others yourself, or choosing the brand of "Eight-Nation Alliance" to mix freely.
A proper car audio system can not only enhance the driving experience, but also increase driving safety and ride comfort. Therefore, when buying car audio equipment, you should consider the compatibility between the individual products and the overall performance to ensure the best possible acoustics.
Toyota Altis (Corolla) Toyota Altis is a popular car, called Corolla in Chinese. As the tenth generation of Toyota Corolla's straight-line upgrade product, Corolla has a unique advantage in audio, because the engine noise is basically negligible, much quieter than ordinary cars, but it may be limited by **, Corolla's audio is really average. The Corolla is equipped with 6 speakers, which are divided into high and low woofers, and the audio hardware is relatively entry-level. If you want to pursue a better listening experience, you need to make a major change to the sound system of the whole car.
Toyota Corolla audio upgrade plan.
DSP amplifier: Gypsy Sound GS1216D
Front soundstage: Gypsy Voice GS2v3
Rear soundstage: Gypsy Sound GS2v3
C-pillar inverted mold. 
gs203+gs201
gs206
The front and rear sound fields are equipped with the most representative speaker of Gypsy Sound, GS2V3, and the tweeter front cavity adopts a horn design, which can play a role in noise reduction and improve linearity, and at the same time can obtain a lower FO and lower limit. The mid-bass is 65 inches, the material is fiberglass, this material is characterized by light weight and strong toughness, so its sound performance is transparent, rich in details, and good dynamics. The midrange material is made of fiberglass like the mid-bass, and the timbre is consistent.
DSP power amplifier GS1216D complete sound system is simple to match, but the best effect is completely different. The Gypsy Sound GS1216D is a 192kHz sampling rate and supports optical, coaxial, and Bluetooth digital signal input. The audio-grade Bluetooth chip supports APTX-HD and LDAC lossless audio, and is the first OTG, so that the mobile phone can directly connect to enjoy massive high-definition lossless resources. The analog and digital signals and audio are fully mixed, while the Bluetooth listening of the mobile phone does not affect the original car warning, and the input resistance adapts to the internal and external power amplifier delay settings. 
Tuning. GS1216D, in the previous years, also attracted the attention of a wave of audiophiles when the new product was released, as well as the pursuit and recognition of Gypsy Sound products by professional audio modification shops. This "pure" - "net" - "high-power" fourteen-channel high-power power amplifier, with a total standard power of 1400W, is a big killer for luxury cars and new energy multi-channel audio system upgrades. Toyota Altis speakers use a GS1216D to actively push the whole car audio equipment, and the sound quality is definitely beyond the expectations of car audio enthusiasts.