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Curious if anyone know what type of crossover filter the Oppo 105d uses, wasn't happy that you can change it as its absolutely not that effective
It definitely does not integrate it well into a system.
Maybe someone else has gotten better results and would like to share.
Type and Slope: It uses a 2nd-order filter design with a 12 dB/octave rolloff slope. This meets the minimum Dolby requirements (at least 6 dB/octave for HPF and 12 dB/octave for LPF) but is gentler than steeper options like the 24 dB/octave THX-recommended LPF. Measurements confirm the LPF hits -3 dB at the selected frequency (e.g., 80 Hz) with a precise 12 dB/octave slope, while the HPF is slightly shallower (just under 12 dB/octave) and -3 dB point is ~5 Hz below the setting.
Frequencies: Adjustable from 40 Hz to 250 Hz in specific increments (20 Hz steps from 40–80 Hz; 10 Hz steps from 80–120 Hz; 50 Hz steps from 150–250 Hz). Default is 80 Hz. The filter only activates when speakers are set to "Small" in the Speaker Configuration menu; "Large" bypasses it entirely.
Implementation: Digital-domain processing via the player's SoC, affecting only analog multi-channel outputs (e.g., 7.1ch RCA/XLR). HDMI, stereo, and digital coax/optical outputs bypass this bass management.
Type and Slope: It uses a 2nd-order filter design with a 12 dB/octave rolloff slope. This meets the minimum Dolby requirements (at least 6 dB/octave for HPF and 12 dB/octave for LPF) but is gentler than steeper options like the 24 dB/octave THX-recommended LPF. Measurements confirm the LPF hits -3 dB at the selected frequency (e.g., 80 Hz) with a precise 12 dB/octave slope, while the HPF is slightly shallower (just under 12 dB/octave) and -3 dB point is ~5 Hz below the setting.
Frequencies: Adjustable from 40 Hz to 250 Hz in specific increments (20 Hz steps from 40–80 Hz; 10 Hz steps from 80–120 Hz; 50 Hz steps from 150–250 Hz). Default is 80 Hz. The filter only activates when speakers are set to "Small" in the Speaker Configuration menu; "Large" bypasses it entirely.
Implementation: Digital-domain processing via the player's SoC, affecting only analog multi-channel outputs (e.g., 7.1ch RCA/XLR). HDMI, stereo, and digital coax/optical outputs bypass this bass management.
Appreciate the post. I know this is subjective (not based on measurements like I used to do in the past but yes the Oppo doesn't doesn't to have a slope that sums wells most music I play.
Would have been so much better to have adjustable crossover slopes etc for better electrical and acoustical summing.
Apparently the 205 has this...?
Contemplating buying the sublime active crossover to use to crossover main and subwoofer as I cannot live without subwoofer these days.
