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answer: audibility of upper midrange on filtered bass speaker.

62.2.246.194

Posted by Arbelos on October 10, 2000 at 07:42:47

In Reply to: Re: 'forepassing' ? posted by paco on October 10, 2000 at 04:56:10:

Thanks, Paco - i read it, but had not enough time to give my answer:

I know that you will hear 'nothing' from a stand-alone filtered bass-driver but:
If you think that a level of maybe -10 without crossover and - 4 x 12 dB in addition with filter (max. - 60 dB) is nothing, then you can happyly live with any cable, any capacitor and with MP 3 sound. The errors are never higher than that.
I am convinced that artefacts between -50 and - 60 dB are well audible, because i repeatedly heard them. No cable has response errors bigger than probably - 80 dB or even less. Still 'we' hear them (i assume from your postings that your ears are well trained too).
So: I think these artefacts are masked by the louder sounds (in the lower frequencies in the case of the MG 1.6 XO) when the bass alone is playing, but when they are added to the tweeter output, they are integrated in (distorted) timbral cues and not masked anymore. The ear is drawn to these upper range sounds and the timbral deviations and errors are recognized with high acuity.

What i was asking for was sources for criticism against the thin flat-foil coils, the 'cognoscendi' as you put it, or negative experiences. I think that there are possible problems in mechanical execution, and (as with other coils) maybe problems again if these are 'solved' by vacuum-impregnation (sonic effects of PU-laquer- dielectric).

I remember having had a dispute with a dynamic loudspeaker developer in the end of '80s. He was working for Roederstein and i was making comments how the sound of my Maggie-crossovers improved with polypropylene caps. He violently disagreed, stating that they lacked 'attack' and 'transparency', that he preferred MKT caps. Ears differ, tastes differ, sonic yardsticks do too - we all know this. There are psychoacoustic reasons why he preferred MKTs, i had to accept that.

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