1. What’s the difference of different woods sound? When we talk about the sound of a guitar, it can be somehow subjective for manufacturer. If you need a typical classical” Spanish Guitar” sound, we suggest you to use tone woods(https://en.wikipedia.org/wiki/Tonewood) on the warmer side. These guitars will have more pronounced low end. If you need brighter and clearer high end, like common in Flamenco Music, we suggest you to choose guitars with spruce, cypress and maple. Please see the below graph for better understanding. 
2. What’s the best humidity of Soltech Guitars? We strongly recommend that you keep your guitar within a temperature range of 60 F(16C) to 85 F(30C), and a relative humidity of 45% to 65%.
2. What’s the best humidity of Soltech Guitars? We strongly recommend that you keep your guitar within a temperature range of 60 F(16C) to 85 F(30C), and a relative humidity of 45% to 65%.