Nandappe 's TWTD 13.5 stuffng

Hello
Please I need some assistance regar ding stuffng the TWTD box by . Nandappe. Stuffng weight Is as per. plans, however. in some tracks bass is too enhanced, almost anoyng, in simple words. Should I add or reduce the stuffing material?
TIA
Jose
 
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Adding sound absorbing material will reduce the amount of bass and flatten the sound. (please see image)

I've also noticed that partial bass is emphasized by a box with ducting in the back, which has to do with the placement of the box and the room.
Please adjust the position of the box.

adding absorbing material.jpg
 
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Please I need some assistance regar ding stuffng the TWTD box by . Nandappe. Stuffng weight Is as per. plans, however. in some tracks bass is too enhanced, almost anoyng, in simple words. Should I add or reduce the stuffing material?

I'm curious as to what kind of music source it doesn't work well with.
Please tell me what music source it is.
 
Hello. Nandappe. Nothing fancy I know. Amp Is TPA 3112D2, direct from streaming Qobuz to Android headphone P2 output or Toshiba DVD, Toslink cable output to DAC. I notice bass is enhanced on pop/country tracks with electric bass Others vocals, chamber or acoustic instruments tonal balance Is perfect. Dianna Kral, Ksenja Sidorova, Jacyntha, Jazz at Pawn Shop. Gil Evans, all perfect. Thanks again
 
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FWIW, I suspect it's the material. A lot of pop / [popular forms of] country music have some significant EQ built into the mix, either for artistic purposes, or more usually to make it sound better on car / portable / bedside radios, computer / TV / smart speakers, cheap ear-buds & the like. Put them on something better, & they often sound imbalanced. This is very common -early Beatles vinyl mixes for instance were essentially balanced to sound decent on teenagers' Dansettes & sounded terrible if you put it on something that didn't have those limitations.
 
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