Buzz
The Sennheiser IE 900 serves as the top-tier in-ear headphone, succeeding the IE 800S after a notable 4-year run. IE 900 features a unique single dynamic X3R driver, an exterior crafted from solid aluminum, 16-ohm impedance, and 125dB sensitivity. The official retail price in Vietnam is 36,590,000 VND.This is the first headphone model from Sennheiser to utilize solid aluminum for crafting the outer casing. Each side of the headphone has been CNC machined from independent aluminum blocks, showcasing meticulous precision and elegance.
The outer shell is anodized, providing a robust surface that resists corrosion from sweat. The sleek contours ensure a comfortable fit, weighing only 4g. Wearing the Sennheiser IE 900 feels exceptionally comfortable.
Utilizing aluminum as the shell material is a method to control resonance and dampen vibrations for the internal driver system.
In the structure of the Sennheiser IE 900, the sound escaping from the driver is regulated and shaped by three Helmholtz resonators, and the sound outlet is designed in a swirling pattern. You can also observe the air vents on both sides of the housing.
The implementation of Helmholtz resonators by Theo Sennheiser aims to counteract the 'masking effect.' This phenomenon, in simple terms, leads to an imbalance in the bass-mid-treble details at lower and moderate volumes. Some headphones require users to crank up the volume to fully appreciate all three ranges and grasp the entirety of headphone details. When played at lower volumes, the bass might be booming, but the high mid and treble seem to disappear 😁Each Helmholtz resonator in the IE 900 influences specific resonant points, resulting in varying sizes. It's truly magical because, judging from the pictures, they look substantial, but in reality, the IE 900 is quite petite!
The acoustic vent, resembling a flower (let's call it a flower to make it familiar), has its own story. This sound vent, when combined with the other three resonator chambers, produces a swirling air stream, assisting in adjusting the sound phase to achieve the desired audio quality as envisioned by Sennheiser.
In the design of the Sennheiser IE 900, the engineering team employed a method of tuning the sound using the housing and passive acoustic measures. They avoided using components like capacitors and resistors for segmentation, ensuring freedom from the specific acoustic characteristics of individual components.
The headphones come with a set of eartips, categorized into two types: silicon eartips and foam eartips, each type available in three sizes: small, medium, and large.
The eartips offer two wearing styles, and how these styles impact sound will be detailed in the subsequent sections of the article after testing. You may also observe the unique filters inside the eartips, adding to their distinctiveness.
The IE 900 adopts the MMCX connector standard, and the accompanying cable is detachable.
The included cable set comprises a 3.5mm cable, a 2.5mm balanced cable, and a 4.4mm balanced cable, catering to all music players and DAC/amplifiers currently available in the market.
Accessories include a sturdy, modern fabric case for storing the headphones after use.
I'll listen and dash off before delving into the detailed review. Stay tuned for more updates, folks!
