ZERO OHM COIL

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CAPZN 32 250 VDC ............................................................................................................................ 32 100 VDC ............................................................................................................................ 33 630 VDC ............................................................................................................................ 33 MCAP 34 400 VDC (330µ=250VDC!)............................................................................................ 34 630 VDC ............................................................................................................................ 35 MKT FILM CAPACITORS 36 250 VDC ............................................................................................................................ 36 BIPOLAR ELECTROLYTIC CAPACITORS 37 BG50.................................................................................................................................. 37 BG35.................................................................................................................................. 38 BR100................................................................................................................................ 38 BR63.................................................................................................................................. 38 HIGH LOAD RESISTORS...................................................................................................39 CERAMIC RESISTORS 39 R5...................................................................................................................................... 39 R11 .................................................................................................................................... 39 R17 .................................................................................................................................... 39 METAL OXIDE FILM RESISTORS MR4 & MR 10 40 mr4..................................................................................................................................... 40 mr10................................................................................................................................... 40 TERMINALS AND COPPER BINDIND POSTS..............................................................41 2
Crossover Network Tuning Our experience shows that high-quality crossover network components can get between 30% and 50% more performance out of your speakers! Good crossovers don't cost all that much and they deliver radical improvements, even in low-cost configurations. This was graphically demonstrated in a report in the leading German hi-fi mag Klang & Ton (see quote below). In the "cheap trick" described in the K&T article (154€ for the speaker pair) the great enhancement in listening pleasure provided by using highend crossover components easily justified the additional cost of 77€, which is just one third of the total final cost of the speakers. It would be difficult to find a better illustration of the crucial importance and huge benefits of high-grade crossover components: ("The replacement...brought a really striking improvement in quality, particularly in mid range, high range and overall presence. The new sound is completely natural, without any trace of 'loudspeaker'. It's as though there were no more speakers you could identify as the source of the sound - what you hear appears impressively disconnected from the physical speakers. Everyone who listened to the results agreed that the enhancement to the sound fully justified the additional DM150 for two highend crossovers.") ("In the high-end version the second capacitor in the crossover is a MKP metallised paper model (C1, in parallel to the woofer). This component delivers a very perceptible improvement in the mid range over the inexpensive electrolytic capacitor, demonstrating that even the parallel components in a crossover have a real and significant influence on the sound.") Klang & Ton 4/98, p. 64 ff. Having read this you're probably interested in the details of "our" recipe for tuning a crossover network for optimum sound performance • Air is by far the best coil core material. Use air coils wherever possible. But remember, when you replace coils the new air coils must have the same low resistance (W rating) as the existing (cored) coils. This is crucial! • There's no alternative to coils with cores for applications calling for very high inductance values. When you have no choice, coils with Aronit cores are definitely preferable to ferrite, provided that their internal resistance is low enough. • On the other hand, ferrite core coils are easier to install in cars than coils with Aronit cores. • In the deep bass range there is ultimately no real alternative to transformer core coils and zero resistance coils. They are the only designs that enable you to combine extremely high inductance values with low resistance and exceptional power handling capacity. • However, reducing the internal resistance of the bass coil is not always advisable as this also changes the tuning of the system. As a basic rule of thumb you should only make this change if you want to change the bass tuning, making the basses more "dry and precise". It's important to understand that "dry" in this context also means "less" bass! • All coils, including the coils wired in parallel to the speaker unit, should have baked varnish windings (or vacuum impregnated windings with wire over 1.4mm thick). • Install an MCAP Supreme directly upstream from the tweeter. This generally makes the sound enormously more spatial and transparent. • When very high capacitance is called for, for example in two-way configurations with a low crossover frequency, you can save money by connecting an MCAP Supreme and an MCAP in parallel. (The Supreme should contribute at least 30% to the total rating.) • Mid-range: Connect an MCAP in series to the speaker unit. • If possible, all parallel capacitors should be MCAPs, or at least MKT metallised plastic film capacitors. • At a pinch you can also use film capacitors and electrolytic capacitors connected in parallel for the bass range. • All resistors in the signal path and parallel to the tweeter should be metal oxide components. 3
Page 1: CROSSOVER NETWORK TUNING 3 COILS 5
Page 5 and 6: AIR CORED COILS COILS Air cored coi
Page 7 and 8: Air cored coils with wire diameter
Page 9 and 10: Air cored coils with baked varnish
Page 11 and 12: COPPER FOIL COILS For some time we
Page 13: CFC12 mH Diameter: 44*0.075 mm=3.3
Page 19 and 20: FERRITE COILS Ferrite coils, of whi
Page 21 and 22: 38 FERRITE DRUM CORE COILS Our high
Page 23: FERRIT CORE COILS 56 mm Ø WITH BAC
Page 26 and 27: Transformer core coils with Core 13
Page 28 and 29: Zero Ohm Coil, Core 106 N106 mH OHM
Page 30 and 31: MCAP-SUPREME CAPACITORS The M-CAP S
Page 32 and 33: CAPZN The M-CAP ZN is a tinfoil cap
Page 34 and 35: MCAP The M-CAP is an audiophile met
Page 36 and 37: MKT FILM CAPACITORS MKT capacitors
Page 38 and 39: Electrolytic Capacitor, plain foil
Page 40 and 41: METAL OXIDE FILM RESISTORS MR4 & MR

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