I evaluated Sennheiser's entry-level HD 505 headphones against the HD 600, and the results are complex.
I tried the new open-back wired over-ear headphones, comparing them to my favorite high-end model.
Sennheiser has recently introduced its new entry-level headphones, the HD 505, which are part of their more "analytical" product line. This series is known for being more accessible, and the HD 505 sits just below the HD 600 model.
The new headphones feature a modified transducer that promises better bass and treble extension compared to previous versions in the 500 series, all without sacrificing musical transparency. With a frequency range of 12Hz to 38.5kHz thanks to their 38mm drivers and an impedance of 120 ohms, the HD 505 are easy to drive, achieving a sound pressure level of 107.9dB per volt, making them suitable for use with devices like phones or laptops.
The 1.8-meter cable comes with a 3.5mm connector, and a 6.3mm adapter is included. Additionally, the cable is detachable and locks in place on the headphones. Priced at $249 or £229 (approximately AU$450), the HD 505 are significantly more affordable than the HD 600, which have an official price of $449 or £399. However, the HD 600 are often available for below £250 in the UK and have been seen for as low as $249 in the United States at times.
In an initial comparison between the HD 505 and the HD 600, sound tests were conducted using Apple Music on an iPhone 16 Pro, accompanied by a USB-C DAC. While the HD 505 are easy to drive and can be powered by a small DAC without amplification, the volume must be adjusted to 85% of its maximum capacity, whereas the HD 600 require 90% for a similar perceived volume.
A key focus in the development of the HD 505 was their lightweight and comfortable design, which is notably different from that of the HD 600. While both models stay in place during use, the HD 505 do not heat the head as much as the HD 600, which can be beneficial for prolonged listening sessions.
Regarding sound experience, the HD 505 offer an increase in bass and treble compared to their predecessors, achieving controlled bass impact. However, the HD 600 excel with a more natural sound, especially in the midrange, allowing for a more organized and detail-rich reproduction.
The difference in sound quality translates into a more immersive listening experience with the HD 600, which offer better transition and a more unified sound presentation. Despite the noticeable bass boost in the HD 505, many users may prefer the tonal balance and richness provided by the HD 600.
Given that the HD 600 can be found at similar prices to the HD 505 in the market, the latter may face challenges in standing out unless price reductions occur in the future.
