Sennheiser HD6XX/HD650 FilterSet
The Sennheiser HD6XX/HD650 Neutral FilterSet contains convolution filters with sample rates from 44.1 kHz to 352.8 kHz and packaged as a .zip file that can be used in most convolvers, like Hang Loose Convolver and Roon for example. Mono 352.8 kHz mono filters are also included for HQPlayer.
FilterSet Free Trial Offer: Download the Hang Loose Convolver 14-Day Free Trial software. Specify the Sennheiser HD6XX Neutral FilterSet in the Order Notes at checkout.
Full Product Description
Frequency Response Measurement & Correction
The HD6XX/HD650 measures with a smooth midrange but has an upper bass hump of +2dB from 70Hz to 400 Hz which gives the headphone the illusion of bass with a warm sound. The actual bass response is over -10 dB down at 20 Hz. While smooth through the midrange, the Sennheiser “house sound” with the peaky 5 kHz means that the high frequencies dominate the sound signature. Listening fatigue comes on quickly.
Engaging the high-resolution convolution filter transforms these headphones into a highly accurate sound reproducer resulting in the “best bang for the buck” headphones. Flat response to 40 Hz and -3 dB down at 30 Hz provides real bass for these open back headphones. Removing the peak at 5 kHz smooths out the response for long-term listening enjoyment with no listening fatigue.
Note the frequency response of the HD6XX and the HD650 are virtually identical. This convolution filterset can be used with either headphone with excellent results.
AK (verified owner) –
Upstream chain: Roon into Chord Qutest into GSX Mini into Senn 6xx. I typically prefer the LCD-XC 2021 EQ’d to my other headphones, but Mitch’s filter for 6xx changed the game. The tonality of the headphone was already legendary, but the filter improved the bass presence immensely. If you purchase this filter for the 6xx, you will hear a more tonally accurate and pleasing sound. I believe this filter makes the 6xx sound like a kilo-buck plus headphone at a very low price. Highly recommend to others.