Are there any notable differences in audio quality between the iPad Pro M3 and the iPad Pro M4

1. Speaker Configuration and Quality:
- The iPad Pro series, including both M3 and M4 models, typically features a four-speaker setup, which is designed to provide a more immersive audio experience compared to the iPad Air. However, the actual audio quality can vary between models due to design and hardware changes.
- The M4 series has been noted for having a less refined audio quality compared to older models like the 2018 iPad Pro 11", with some users reporting that the sound is less clear and lacks bass, particularly in the 11-inch version[3][4][10].

2. Bass Response and Overall Sound:
- The M4 models, especially the 13-inch version, are louder and have more bass than the smaller 11-inch model, but the overall quality is often described as less refined compared to older iPad Pros[3][4].
- There is no specific mention of significant improvements in bass response or overall audio quality in the M4 compared to the M3, but the M4's larger size can contribute to louder output.

3. User Feedback and Comparisons:
- Users have generally praised older iPad Pro models for their superior audio quality, with the 2018 iPad Pro 11" often cited as a benchmark for excellent sound[3][10].
- The transition to newer models like the M4 has seen a decrease in audio quality, with users noting that the sound is less clear and more compressed, particularly affecting bass and mid-range frequencies[4][6].

4. Technical Specifications and Features:
- Both the M3 and M4 iPad Pros support advanced audio formats like Dolby Atmos and Spatial Audio, which can enhance the listening experience when using compatible headphones or external speakers[8].
- However, the built-in speaker performance is where the M4 models have faced criticism, with some users expressing disappointment compared to previous generations[6][10].

In summary, while both the iPad Pro M3 and M4 offer advanced audio features, the M4 series has faced criticism for its built-in speaker quality, particularly in comparison to older iPad Pro models. The M4's larger size can provide louder output, but the overall audio refinement is often considered less impressive than in previous generations.