TasTinker
Member
- Joined
- Aug 5, 2023
- Messages
- 14
- Likes
- 49
Hi all
Inspired by the Directiva threads here's the outcome of my latest flow slot experiment.
Top end I'm using Sb26ADCs in Audiohorn 'ReShape' Tweeter Waveguides
Mid-woofers are Sica 6.5H 1,5 CP mid woofers, with Melamine foam pads in the slots and Twaron fill in the enclosure.
Bass are Visaton TIW250s in sealed boxes EQ'd flat to low 30's
xo varied in development between BW3 and LR variations, currently LR
DSP and amps by Hypex 253
Very very happy with the end result, pulled my LXmini clones apart for the components the improvement was so noticable.
Couple of things to share from the process:
With the flow slots I found damping choices were much more critical than precise slot size and placement. It affected both the response and H3 in particular.
A cubic chamber, despite the conventional wisdom of unequal sides, led to the easiest response/distortion combination.
If experimenting, making up a test box with adjustable dimensions and insertable slot panels enables quick concept checks.
The Sica mid woofer is a great option but does have a sharp response wiggle around 1500hz likely from surround resonance. With it's double roll design the options for edge coating to try and reduce it appear limited. OK if acceptable as is but might be difficult to address it without DSP.
Large cell melamine foam damping in the slots (dark grey acoustic panels) for some reason worked well in FR but resulted in high H3 measurements, the white fine celled 'magic eraser' blocks didn't result in the same F3 problem.
As noted I'm stoked with the oucome. Huge thanks to the ASR community for all I've learnt following various threads, so appreciated!
First image is without the NF bass measurements.
Inspired by the Directiva threads here's the outcome of my latest flow slot experiment.
Top end I'm using Sb26ADCs in Audiohorn 'ReShape' Tweeter Waveguides
Mid-woofers are Sica 6.5H 1,5 CP mid woofers, with Melamine foam pads in the slots and Twaron fill in the enclosure.
Bass are Visaton TIW250s in sealed boxes EQ'd flat to low 30's
xo varied in development between BW3 and LR variations, currently LR
DSP and amps by Hypex 253
Very very happy with the end result, pulled my LXmini clones apart for the components the improvement was so noticable.
Couple of things to share from the process:
With the flow slots I found damping choices were much more critical than precise slot size and placement. It affected both the response and H3 in particular.
A cubic chamber, despite the conventional wisdom of unequal sides, led to the easiest response/distortion combination.
If experimenting, making up a test box with adjustable dimensions and insertable slot panels enables quick concept checks.
The Sica mid woofer is a great option but does have a sharp response wiggle around 1500hz likely from surround resonance. With it's double roll design the options for edge coating to try and reduce it appear limited. OK if acceptable as is but might be difficult to address it without DSP.
Large cell melamine foam damping in the slots (dark grey acoustic panels) for some reason worked well in FR but resulted in high H3 measurements, the white fine celled 'magic eraser' blocks didn't result in the same F3 problem.
As noted I'm stoked with the oucome. Huge thanks to the ASR community for all I've learnt following various threads, so appreciated!
First image is without the NF bass measurements.