Dynavox 207257 Black Audio Isolator, 0.5m RCA Cable, Compatible with Home Audio, PC, Vehicles

This won't work for everyone basically because there's as many causes of humming in the system as variables affecting the weather, but it did work for me!!! Having isolated every conceivable option, checking and swapping connections, moving equipment and wanting to take a sledgehammer to my system, I fathomed the only cause of the intolerable hum was a grounding problem on the pre out RCA of my valve pre amp (little dot mk 4). It was worse when using with my preferred power amp - the PS Audio S2000. On paper, this was an ideal sonic match of retro and modern, hybrid class a, valve and class d power output. I spend many hours reading every forum and review known to Google! I'm sure I could dismantle the little dot and work out a way to better ground the terminals inside the machine, seeing I'd have to learn electronics from YouTube, I figured buying one of these was a punt worth taking. 2 mins later, putting this inline between the preamplifier and the power amplifier and the hum is gone!! Problem solved, no soldering iron and learn on the job hifi electronics degree needed. It you have a grounding hum on a phono output, try this. At least with Amazon you've got a no quibble return and refund. I already own dynavox components, a staple switching box in my system, so knew it was a trusted quality brand. I recommend this 100%

1) The female RCA connectors on the unit are not properly supported by the chassis. When you press in the RCA cables, the connectors push back into the box. Nothing holding them apart from the solder points. These will snap-off if cables are plugged/unplugged regularly. 2) Bass frequencies are killed. Highs are accentuated. 3) Product document in German & French only.

This isolator works better than others that I've tried but the real solution is better shielded cables, preferably "three wire" balanced. That arrangement cancels out noise completely.

Nel mio caso è stato miracoloso togliendo ronzii causati da loop di massa quindi altamente consigliato però solo se il problema è questo..quindi come già detto da altri utenti controllate che il problema sia legato ad un anello di massa.. il suono dopo l'intervento del dynavox non ha subito grosse variazioni in negativo anzi sembra più aperto e dettagliato anche se leggermente meno dinamico...

J'avais un gros problème de ronflement (buzz) sur mes enceintes suite à l'installation d'un nouvel amplificateur de puissance classe D connecté à mon ampli Home Cinéma pour alimenter un caisson de basse "Home Made" (construction maison). Après avoir passé du temps à rechercher la cause de ce dysfonctionnement sur mon installation électrique et à faire des recherches sur internet, j'ai trouvé des écrits qui abordaient le sujet des boucles de masse et qui fournissaient des conseils, notamment sur la solution du boîtier à filtre passif. En intercalant ce filtre entre les 2 amplis (en respectant le sens de branchement) le souffle à disparu totalement. C'est un plaisir de pouvoir mettre sous tension son système Home Cinéma et de n'avoir aucun bruit parasite avant de démarrer l'écoute d'un morceau de musique ou le visionnage d'un film. Je suis totalement satisfait de ce produit car il a résolu mon problème pour un prix raisonnable comparé à d'autres offres plus onéreuses.

Hatte einen Effekt, aber nicht wie ich mir erhofft habe!

Tenía un ruido en mis altavoces de alta gama que me estaban volviendo loco, era el cable pre-out que va del receptor denon x8500h al amplificador denon pma 2500ne para alimentar los altavoces frontales para escucha en stereo, de verdad que era un ruido insoportable, fue conectarle el dynavox y desaparecer al 100 x 100 el ruido y ni acercado la oido a 1 cm del altavoz se escucha adsolutamente nada Lo dicho. ¡¡¡muchas gracias dynavox!!!