Purité Audio
Trade: Purite Audio
Inner tube is really a spring, rolling air diaphragm is what you need.Inner tube under TT felt pads under speakers, rubber feet under dac and pre just to tilt the displays up.
Keith
Inner tube is really a spring, rolling air diaphragm is what you need.Inner tube under TT felt pads under speakers, rubber feet under dac and pre just to tilt the displays up.
I have decided not to respond to this post. I hope the forum doesn’t break.
Why not you use google and answer your own questions?That's another interesting point - what would be perfect speaker isolation? Is it a 500kg speaker hanging from long ropes or would it be attached utterly rigidly to a concrete floor (with rugs to cut reflections) or would those two be the same?
Presumably, the best isolation answers change (for a given sound volume) as the speaker's mass falls - so how should I view my 36kg B&Ws? What does putting a layer of (say) Sorbothane under them do? Are we simply trying to prevent a vibrating speaker from making the floor shake, which then means that the speaker is shaking, which then...?
Why not you use google and answer your own questions?
professionals use well loaded hemisphere sorbothane for reasons they already discussed ten years ago. They also used springs loaded system if they want to go all out.
Google coupling
Google decoupling
Understand the concept
Figure out what you want
Then look at solutions : sorbothane, springs, foam.
Whats the best solution? Whats used in the studio industry?
There seem to be a huge number of different devices on the market claiming to improve a systems sound quality by reducing vibration in electronic components, you know anti vibration pods and alike. At the same time many highly respected active speaker manufacturers are housing their amps within the speaker itself, which surely must be one of the most vibration prone places possible. It seems logical to place anti vibration devices under record decks but If companies like ATC and others don't feel the need to place their amp and crossover in a separate boxes might this suggest vibrations are not that much of an issue with regard to electronic components?
Edit - This is not meant to be a challenge to those who have strong views either way, rather an opportunity to share your experience.
Agree for the most partI did use Google when my list of things to wonder about was getting long - it led me to join PFM.
It's a long time since I studied any of this stuff (and even then we spent more time on stress concentration factors and transmission paths), but even I know that quite a lot of what I can see on the internet about this varies from the 'simple and incomplete' to downright weird.
I am also aware of what goes under te speakers in some recording studios because musician friends tell me about it while laughing hysterically at what hi-f nerds like me think works and what we'll pay for it.
I just asked a professional guitarist with 30+ years recording experience whatever happened to the Sorbothane sheets and half-balls that we saw in some studios when we were younger. His comments can be summarised as - you still see them but there never was a consensus, most people still stick their near-field monitors on the desk, and the 'big stuff at the back' may be on concrete, inserted into concrete or bolted onto the XXXXXX wall, but most of the time it's just on the floor. He's been in studios where they have 'things on springs', but it's far from standard. He has however never been in a studio that has bouncy wooden floorboards, no room treatment and lots of soft furnishings.
The fact that studios don't all use (say) Isoacoustics Gaias or the Townshend equivalents or even spikes under speakers does not mean that they don't work well in the home.
Some of the articles linked to on this forum have been more informative, factual and free of twaddle than the items I have found myself on the internet.
@NickofWimbledon Ah it must be because B&W don't know how to make speakers, such a poor and broken design. Terrible cheap speakers. Awful that they sound better for a few hundred of IsoAcoustic utter foo with no measurements
Really pleased they work for you. Keep up the good work.
I was wondering when Keith were going to point out this catastrophically fatal flaw in Nick's methodology....Slightly raising the height of the speakers ( by adding the feet) will make more difference than any properties of the feet themselves , to humour me how do you propose the feet have improved ‘bass grip’ whatever that is?
Couldn’t find any measurements for the D3 but these D4’s are not storing energy.
https://www.stereophile.com/content/bowers-wilkins-diamond-series-804-d4-loudspeaker-measurements
Keith
Were you blind folded, twirled round thrice, and confused by talk about cardioid response, all competantly designed DACs (and presumably speakers) sounding the same while trying to fathom why it sounded different? No? UKAS accredited test house? No? Ah you are obviously deluded by the expectation bias having ££ to improve £££ speakersI was wondering when Keith were going to point out this catastrophically fatal flaw in Nick's methodology....
On a serious note, Keith does have a point here, which is why I made sure to keep the height of my speakers unchanged before and after installing the OREA pucks (I did this by adding/removing plywood shims from under the speakers) . FR measurements showed my methodology was robust as there was no change in the before or after FR or waterfall measurements (by 'no change' I mean a change bigger than the intersample variations you get from repeated measurements, - the room is never energised the same way twice and trying to interpret changes in spectral decay with basic tools like a UMIK-1 and REW in the presence of external noise pollution is folly IME). Yet the improvement in the dynamic attack in the midrange was so obvious after installing the pucks I had to tweak my EQ settings as I found my speaker's presentation had become too forward for my liking.