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1/2 the price of the CAST-PIO !


WWW.HUMBLEHOMEMADEHIFI.COM now ranks the RS Series caps as the 2nd best cap on the planet (only exceeded by the DUELUND CAST-PIO Series) !

Duelund RS Copper Loudspeaker Capacitor 100VDC - typical tolerance 2%

Technical specifications (according to manufacturer): "The all new RS series from Duelund is a further improvement on the VSF line of capacitors. After many years of research and development Duelund decided to improve upon the original VSF by applying the elaborate manufacturing process used in making the CAST version. Using high purity copper foil with a wax impregnated dielectric and treating it with the anti-resonance CAST material the RS series was born. These capacitors approach the CAST performance in a number of ways, but at a lower cost. The outer lead out, closest to the edge of the capacitor, is connected to the outer foil and as such should be connected to the lowest impedance path to ground". Sound: After many hours of burn-in time the main thing that I kept writing about in my notes was how natural the Duelund RS-Cu sounds. This is one of the few capacitors with which I didn't have the urge to do some fine-tuning or mixing with other types / brands to reach an optimum result. In all the loudspeaker crossovers I tested them in, they just sounded so logical everytime. It didn't seem to matter if the tweater had a textile, magnesium, ceramic or beryllium dome - the Duelund RS just portrayed the sonic signature of the tweeter as it was. Nothing added, nothing hidden, no need to tweak, a real no brainer. Comparing the Duelund RS to the Rike Audio S-Cap I found the RS to give a richer tonal balance, like most copper versus aluminium caps do. The Rike Audio S-Cap seemed more up-front and a little more forward in the lower treble. In direct comparison the Duelund RS had more depth and was a fraction more forgiving to the ear. Not that the S-Cap is rough, not at all, but the RS just seemed to "flow" a little more. Focussing on the highest frequencies, again the Duelund RS seemed to sound the most natural. Various high-grade Mundorf capacitors that I compared the RS to all seemed to high-light that area a bit. This can be usefull or pleasent in some cases, but for me, they were not strictly neutral. Compared to the Duelund VCF-Cu the top-end has improved. Although a very nice capacitor, I always found the VSF-Cu to have a slightly rolled-off top-end. The Duelund RS, like the CAST-Cu, has more top-end clarity and together with that, more spatiality. Are we then looking at a CAST-Cu in disguise? No, the CAST-Cu still is the no-compromise capacitor with a blacker back-ground, making it more silent than the RS. Also the RS-Cu doesn't quite have the same image depth as the CAST-Cu. But like I stated earlier, the Duelund RS Copper Capacitor is a real no brainer, once you have put this capacitor in your loudspeaker crossovers you will never need to tweak again! Everything just sounds so logical. Verdict: 13

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