My first post, please let me know if anything needs to be updated.
Sennheiser's HD 660S is the ideal open back, dynamic headphone for the passionate audiophile. Meticulously crafted from hand selected components and specially developed acoustic materials, it delivers incredibly low harmonic distortion for an exceptionally natural, life-like audio experience. With a lower impedance of 150 ohms, the HD 660S offers the versatility to enjoy reference class high fidelity sound with stationary and mobile players alike.
About this item
Reference class open dynamic wired headphones
New improved transducer design for very low harmonic distortion
Hand-selected headphone drivers with precise left and right matching tolerances for accuracy
150 ohms nominal impedance to allow direct connection to both stationary and mobile HiRes players
Edit:
Appears to be roughly same price at both Addicted to Audio and Minidisc
https://addictedtoaudio.com.au/products/sennheiser-hd660s-op…
https://www.minidisc.com.au/sennheiser-hd-660-s-open-back-he…
The Massdrop HD6XX is the best way to get this series of Sennheiser sound for a reasonable price
Sennheiser has done an Apple and not only raised prices, but clamped down on regional pricing and not allowing overseas retailers to directly ship to AU