Can the level of "hi-endness" be even higher? It surely can
At the higher end of hi-end, we have an offer from the large audio equipment reseller in Russia:
WireWorld Platinum Eclipse 7 Speaker Cable 2.5m
With the exchange rate of roughly 60, the dollar equivalent of the price is $ 30 600.00
Thank goodness, this is for a pair of them
Although, in the US it's almost half the price:
PLATINUM ECLIPSE 7 SPEAKER CABLE PAIR
Somewhat off-topic, but couldn't resist
Putting a suitable Zobel at the speaker end of the cable is not secret. It has been discussed for some time. The Zobel resistance has to roughly match the cable RF characteristic impedance - not the speaker nominal impedance. It works by damping RF resonances in the cable, which can result in amp instability or increased RF pickup. Its effect on audio frequencies is indirect: keep the amp stable, keep RF out, and then two mechanisms of sound degradation are removed.
Duh.
Yes, and it works.
I am currently running TV antenna 75 ohm coax (single center core, dense braided shield, no platings) with 82 ohm resistors (nearest value to hand) across the speaker binding posts.
This gives clean, clear enjoyable sound at BGM levels....interesting thing is MF and CF resistors sound different.
Dan.
If R is across binding posts it is parallel to the cable capacitance (I assume that is why you are using TV coax) and not in series with it. Or did mis understand your arrangement?
I have found that for audio path, CF sounds better. Compared to metal (oxide) thick film, under certain uses like a main output source resistor or feedback resistor, the metal oxide thick film measures higher third harmonic.
You have it correct, the 82R's are across the cable/loudspeaker interface (binding posts) to damp the coax cables and keep a lid on rising impedance of loudspeaker.
The MF/CF comparison yields CF subjectively louder with a bit of midrange 'grain/dirt' but preferable to MF which sounds 'clean' but 'wrong'.
I'm not in love with either, but both are preferable to no shunt loading.
Dan.
The MF/CF comparison yields CF subjectively louder with a bit of midrange 'grain/dirt' but preferable to MF which sounds 'clean' but 'wrong'.
I'm not in love with either, but both are preferable to no shunt loading.
Dan.
The characteristic impedance determines the L and C (per unit length) at all frequencies hence going from 100 Ohms or so to 8 had the expected pathological issues with some amplifiers since no speaker is an 8 Ohm load in the purely resistive sense.
Not this again. To the first order the L and C per unit length do not vary with frequency. Take 6 RG58's and parallel them, the actual lump L and C are the same as computed from the characteristic impedance (8.33 Ohms no need to nit pick). In terms of lumped L and C this will be indistinguishable from the Polk cable. The characteristic impedance at audio frequencies never mattered, the line is to short but the numbers have to be the same. The huge C makes some amplifiers oscillate in either case.
L and C don't vary much with frequency, but their reactance does. Z=sqrt(L/C) is an approximation, only true when resistance is negligible compared with inductance. Therefore not true for most (or all) of the audio frequency region.The full expression includes series resistance and shunt conductance. In the audio region the full formula is best approximated by Z=sqrt( R/(j 2 pi C) ) - this is complex (i.e. reactive) and frequency dependent. That is why talk of an '8 ohm' speaker cable is just a figment of the cable maker's imagination.
This belongs to snake oil threads where one can find wonders, like:
Speaker cable elevators.
Speaker cable burn-in
Google those, garanteed ROFL.
And a 75 ohm shielded coaxial cable also has that characteristic impedance according to its high working frequencies, as well as a two-conductor TV cable in unshielded parallel had a characteristic impedance of 300 ohms.
As already said, neither a speaker has 8 ohms in DC (it is always lower) this characteristic impedance normally corresponds to a test signal of 1000 Hz with which the manufacturers measure their speakers. It is not standardized, it is generalized, which is not the same thing. In a twoofer and a tweeter the 8 ohms of characteristic impedance are measured at other frequencies, if I remember correctly, they were generally measured at 600 Hz and 10000 Hz,
respectively
So I do not see how these generic devices can be used for boxes of 4, 6, 8 ohms indistinctly.
I share, and every time there is more snake oil, now (although there are no commercial ends in between) every time I read more in the forums about the reviewers who wait a while to give their opinion about the products.
Burn in de speakers ..... well, let's say it can be discussed.
But, burn in of magnetic capsules, Dacs chips and / or CD players ....?
It seems that most reviewers do not need to know basic electronics, would have to explain the operation of silicon devices.
I guess talking about lakes within silicon would send them to a fishing weekend !
Off topic, i sorry ....
We keep talking about two different things. Let me ask you a question, do you disagree that the RF characteristic impedance defines the bulk L and C (you need the speed of propagation also)? I used RG58 as an example for a reason, 8 parallel is ~250pF/ft the Polk (from a web source) is 280pF/ft so what's the problem?
Can the level of "hi-endness" be even higher? It surely can
At the higher end of hi-end, we have an offer from the large audio equipment reseller in Russia:
WireWorld Platinum Eclipse 7 Speaker Cable 2.5m
With the exchange rate of roughly 60, the dollar equivalent of the price is $ 30 600.00
Thank goodness, this is for a pair of them
Although, in the US it's almost half the price:
PLATINUM ECLIPSE 7 SPEAKER CABLE PAIR
Somewhat off-topic, but couldn't resist
I got tired of how stiff the solid 12ga copper Romex was and ordered these for $16 for 6ft of 12ga flexible and terminated with gold plated bananas. They are really nice and supple with firm fitting jacks. It would cost me more to make them from jacks and raw wire and not look as good.
They sound very nice - I should measure them.
Amazon.com: Mediabridge 12AWG ULTRA Series Speaker Cable - Gold Plated Banana Tips (6 FT) - CL2 99.9% Oxygen Free - Black (SWT-12B-06B): Electronics
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