So, I know the pillows have a pinpoint or discreet affect. Before the pillows it played best with Bass set to -4 and Treble set to +2. That particular record with the two pillows tacked to the wall play best on the Luxman with the 70Hz pushbutton implemented. It can be muddy, it can be sharp, it can be fuzzy, vocals can move rear, etc. A subsonic filter is a component on your subwoofer that reduces the intensity of notes which come through at lower frequencies. I have a couple more records that behave the same, but the D&B album is the most variable. Every past adjustment in system configuration affects the play of that record (room treatment, speaker location, stylus tracking force). One such record is "To Bonnie From Delaney" by Delaney and Bonnie & Friends. When I do that, I feel the need to turn the treble to +1 or +2. To get the same results using tone controls, I need to turn the bass on the Luxman to -3 or -4. The subsonic filter is to remove the very low frequence (less than 10Hz) signal generated by wow and flutter on turntables, along with warps in the record. On some 70s rock recordings, I've noticed that a dark thumping bass can be remedied to a melodic bass in the same region by way of the low cut 70Hz pushbutton. I don’t feel the need to use these filters with any other type of music. The natural rolloff at lower frequencies iscall you need. Ported yes you'd probably use one but sealed should be fine. Some people claim it is so inaudible that results vary by userĪm I correct about all of this? Using these two filters seems to work great with rock & roll music especially with horns, a strong kick drum and deep bass playing. Generally a subsonic filter isn't needed with a sealed enclosure.
Subsonic (15Hz) - selecting this will eliminate any rumble noise from the turntable but not much else. Super high notes are softened or eliminated High cut 7kHz - This seems to filter out high shrieking tones across the board. This signal often contains no music and its. I seems to work better than activating bass control with tone A subsonic filter is essentially a high-pass crossover which blocks the frequency signal, generally, from 10Hz-40Hz. Activating it works like an across the board correction. Low cut 70Hz - It seems to filters out very low bass that interferes with tonality of bass. These two switches operate independently from “tone defeat”
#Subsonic filter frequency manual#
The service manual is available, but it does not address in any detail, the following assumptions of mine: I cannot find the user manual anywhere on the web. I have a vintage Luxman L400 integrated amplifier.
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