My favorite ADI-2 EQs for the Jecklin Float QA, on request.
They are optimized for:
• Listening to naturally recorded music like Classical, Acoustic and Jazz.
• A listening level of about ca. 75 dBA LEQ, that’s neither quietly nor very loud.
For Classical orchestral music this equals about the loudness of the real event, which is quieter than some might think.
Therefore, adjust BB (Bass) and BT (Treble) to taste.
B1 “Q” adjusts sub, the very low bass extension.
You can even combine bands of both EQs, like bass from EQ1 with treble from EQ2.
• The amount of bass and treble depends on the listening level.
If you tend to listen loud (I don’t) you need less bass and treble boost.
• There’s even a little bass-dependency on head-size / ear-driver distance.
My relatively flat-lying ears just very slightly touch the drivers.
• With bass-heavy-, or treble-hot-music, bass and treble can be reduced.
• ADI-2’s “Loudness”-function can boost bass and treble Volume-Control dependent.
When using it this way, bass and treble can be reduced too.
• Same applies if the “Transdyn” is used, that is built into a version of the JJ Float QA Amplifier.
Have an eye on ADI-2’s meters, switched to show “Post FX” or “Dual” levels, to avoid distortions from overload / OVR of ADI-2’s output.
The fitting ADI-2 Reference Levels for the JJ Float QA Amplifier are +4 dBu (Pro) or +7 dBu (DAC).
Harman Bass Extension:
BB: Gain +11.0 dB F 79 Hz Q 1.5 Shelf
B1: Gain +0.0 dB F 31 Hz Q 3.0 HiPass
B2: Gain -1.0 dB F 125 Hz Q 1.7 Peak
Extreme Bass Extension and some Treble Boost:
BB: Gain +12.0 dB F 78 Hz Q 1.5 Shelf
B1: Gain +0.0 dB F 31 Hz Q 6.0 HiPass, less Q = less sub
B2: Gain -0.5 dB F 125 Hz Q 1.7 Peak
B3: Gain -3.0 dB F 160 Hz Q 2.0 Peak
B4: Gain -0.5 dB F 1.60kHz Q 1.4 Peak
B5: Gain -2.5 dB F 5.4 kHz Q 2.8 Peak
BT: Gain +8.0 dB F 10.0kHz Q 0.8 Shelf
DA Filter ADI-2 Pro (AKM): SD-Sharp
The EQ setup named “Extreme Bass Extension” is exactly that.
It’s meant to play natural instruments or older recordings that don’t contain the huge amounts of sub-bass that often can be found in contemporary tracks.
For those fitting tracks it’s really fun, shifts them at least one decade in the recording history time scale.
For EDM or other artificial sounds it‘s too much, the “Harman Bass Extension” EQ is better suited and avoids hitting JJ Float QA’s limits too early.
“Harman Bass Extension” EQ still has a 3 dB bass boost following the Harman suggestion and extends to 35 Hz.
Best to have EQ Presets prepared and select accordingly.