Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. The frequency response differs (40 Hz - 20000 Hz vs 10 Hz - 19000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. The driver size differs between the two (NA vs 6.5 mm), which can influence sound depth, bass response, and overall audio clarity. Overall, both headphones are feature-rich and cater to users looking for a combination of sound quality, comfort, and wireless convenience. Impedance levels vary (32 Ohms vs 17 Ohms), which can affect compatibility and audio output when used with different devices. There is a noticeable difference in weight (NA vs 19 g), which may affect comfort during extended use. Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience. If you're comparing Sennheiser IE 4 and Klipsch AS-5i, both models offer a strong combination of sound performance, comfort, and modern wireless features.

Verdict: Choosing between Sennheiser IE 4 and Klipsch AS-5i depends on whether you value better sound, longer battery life, or enhanced features.