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Post by ChrisB on Jun 1, 2016 20:56:58 GMT
I tried it and it made the straws fart as they rattled together, despite being packed tight and taped together into a bundle.
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Post by speedysteve on Jun 2, 2016 7:05:42 GMT
I tried it and it made the straws fart as they rattled together, despite being packed tight and taped together into a bundle.  |
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Post by ChrisB on Jun 2, 2016 7:11:25 GMT
Ha, mind you the ports were of a very small diameter and I was playing them very loud with a load of Levinson watts up their chuff so the pressure must have been pretty high in there!
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Post by MartinT on Jun 2, 2016 8:58:07 GMT
Wasn't it Celef who favoured stuffing ports with straws?
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Post by dsjr on Jun 2, 2016 10:20:14 GMT
Mission too.
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Post by jandl100 on Jun 2, 2016 14:59:11 GMT
Wasn't it Celef who favoured stuffing ports with straws? Yup, Celef did. Then that morphed into Proac - their excellent Response 2 speaker had straws in the port - very fine bass performance for a smallish standmount. |
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Post by speedysteve on Jun 2, 2016 19:40:13 GMT
Hehe, bass performance and standmount = oxymoron
I know what you mean though;) |
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Post by MartinT on Jun 2, 2016 20:09:05 GMT
I agree!
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Post by dsjr on Jun 3, 2016 11:15:15 GMT
The bigger IMF's used to give what I describe as 'pressure waves' in the very low bass. Played with a wobbly record deck and cartridge, you could almost feel seasick, as there was substantial air movement with a 17Hz tone played into them, so although the bass wavelengths may well mean that accurate reproduction of such frequencies is academic, you certainly felt 'something' if the source wasn't controlled enough - the 'Bingo' kit on the (Linn made) Isobarik active crossovers did similar things through over-equalisation . The TLS50 didn't go down as far, but the mk2 went some way to damping the excesses a little more I remember.
I had a pair of traded-in Mission 737R's measured for fun. These had drinking straws tightly packed into the ports and in all honesty, the ports still 'chuffed' if the volume went up too far, which is something practically all ports can do I think. The bass and mids were very good I remember (770 main driver?), but the tweeter spoiled it for me for long-term listening.
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Post by MartinT on Jun 3, 2016 11:52:29 GMT
The bigger IMF's used to give what I describe as 'pressure waves' in the very low bass. Played with a wobbly record deck and cartridge, you could almost feel seasick, as there was substantial air movement with a 17Hz tone played into them, so although the bass wavelengths may well mean that accurate reproduction of such frequencies is academic, you certainly felt 'something' if the source wasn't controlled enough Agreed - my good hi-fi friend from years ago owned a pair of IMF Professional Monitors driven by Dynavector monoblocks and those speakers could most certainly produce deep pressure waves. I also agree that good sound quality from speakers with extended bass requires amplifiers with great control / damping factor / current delivery. I have experienced this myself in moving from the Chord (good control) to Belles (superb control) power amplifiers. |
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