 De Stack Audio Ova 70 speaker isolators hebben geweldig impact op de voedselkwaliteit. Zoals je het gezien hebt, heb ik ze aan mijn setup 1 gevoel. Maar op rond 1000 euro voor een set van 8, zou het niet met iedereen het budget zijn. Maar nu is de Ova 50 bijna half de prijs. In februari 2023 heb ik de Ova 70 speaker isolators gevoeld en ze stonden op de PMC loudspeakers in mijn setup 1 van dat moment op. Er is ook een grote model, de Ova 100, met 100 mm in diameter, dat heeft 5 cellen in een damping compound zoals waar de Ova 70 heeft 3 cellen. En nu er is de Ova 50 dat heeft 2 cellen en een diameter van 50 mm. De Ova 70 zal je terug op rond 990 euro en de Ova 11460 euro. Weer daar geld voor zeker, maar niet met iedereen het budget. Dat is waar de Ova 50 komt. Aan 520 euro kosten ze bijna half geleden met de Ova 70. Loudspeakers isolators zijn er van een groot deel van manufacturers, zoals ik in mijn review van de Ova 70 heb gegeven. Maar ze gebruiken welke soorten spring- en damper systeem, waardoor ze voor sommige bewegingen van de loudspeakers zijn. De spring-damper properties dependeren van de weight van de loudspeaker en als het optimale bezoek is, de loudspeaker bewegingen kunnen minder zijn, maar niet 0. De stack audio isolators werken verschillend. Ieder spike onder een loudspeaker is geplaatst door een Ova isolator, dus je moet vier isolators per loudspeaker. De isolators zijn machine-dealuminium cases containing 2-5 cellen op de model, in welke een mix van particles van, amongst andere, tungsten en powler. Ze converteren kinetische energie in heet. Stack Audio heeft gegeven voor patiënt en hij wil niet meer tot de patiënt is gegranteerd. De Ovas vormt een solide mechanische connectie tussen de loudspeaker en de vloer, waardoor ze op hetzelfde tijd absorpte vibraties. Voor gebruik van onkapende vloers, drie spijgen per isolator zijn gegeven. Voor solide vloers hebben de isolators patiënts gehaald. De Ova vijfde measures 50 x 30mm. De spijgen zijn in 15 en 25mm hoog. Bols en nods zijn in een brede variatie om de spijgen op de spijgen op de speakers te matchen. Zet het op straat voor. Blijf de bol in de toppen van de Ova. Blijf op de lockende nods en, als nodig, blijf in de drie spijgen. Doe hetzelfde voor de drie andere Ovas. Dan laat de speaker op het zijkant, zodat je de spijgen niet kan blijven en blijf in de Ovas. Plak de spijgen terug en adjust de Ovas voor een stabiele plek. Dan finish installation by tightening the locking nuts. Ik ben benieuwd naar de Ova 50's tot de PMC Fact 12 Signature loudspeakers. De amplifier was de Air AX520 connecteerd tot de PMC's over AudioQuest Robinhood Zero loudspeaker cable. De cord Dave deed de digital to analog conversion en was connecteerd tot de air over Grim Audio SQM XLR cables. De Grim Audio Mewan digital player was connecteerd tot de Dave over een networkacoustich Mewan AES EBU cable. Both the Dave en de Grim were connected to the mains over a transparent power isolator 8. The connection from the Grim to the Zixel ZS 1900-10 HP switch was over a networkacoustich Mewan Ethernet filter and cable. Connection to the internet is over CAT 6 cable to the internet modem. From the Zixel switch a glass fiber connection goes to the NetGift ProSafe GS418 TPP switch on the 3rd floor where the Intel Nock 10i7 FNH running Roon Rock is connected over a CAT 6 patch cable. So the Nock is the Roon server, the Grim Audio, the Roon Endpoint in this setup. An Apple iPad Pro was used to operate Roon. The room where the testing took place has a brick and mortar walls, ceiling and floor. On the concrete floor is an oak floor on a damping sub-film. The equipment was placed in the Creative Trend 3 rack. The air amp and the Grim player were on stack audio over EQ CSA1 equipment isolators. Replacing the over 70s with the 50s was of course a step back but the improvements compared to the standard board tipped feet were still big. En compared to the spring and damper systems there still was a better projection of the instruments in space. Better transients and lows. It's a kind of deblurring that clean up in time. If you're sensitive to time smearing, the hours are your best friend. Microdynamics related to deblurring improved also clearly. Funny enough, they also reduced mid-low blurring that I used to think were room modes. I'm not saying that they can replace room treatment when needed but I'm sure you need less of it if you use the overs. Stack Audio states on their website that the overs also work on the speaker stands. So I mounted the over 50s under my old target speaker stands that carry the Acoustic Energy Radiance 1 loudspeakers. They were connected over Kimber 4 PI loudspeaker cable to the Moran's PMKI pearl light amplifier. De source in de setup 2A is now the Aversolo DMP A6 master edition. It is connected over Siltek London RCA cables to the amp and overcat 6-patch cable to the Uptone Audio Ether region switch with Uptone Audio Ultra Caps 1.2 power supply. From there, a glass fiber connection goes to the main switch on the 3rd floor, the Netgear ProSafe GS418 TPP. See about my reference setups made 2023 for more info. The links at the usual places. The floor on the 3rd floor is concrete with carpet on top. To be honest, I didn't expect too much from playing with the overs under the target stands. Vibrations have to go from the speaker cabinets via the stands to the overs. That can hardly be effective. But I was wrong. The impact on the sound quality was far greater than I anticipated. Let's start with the stereo image that enlarged considerably and had far better detail and focus. Microdynamics clearly improved just as pace and rhythm. The improvement was such that if I had spent the same amount on electronics, I would not achieve the same quality improvement. Normally I use setup 2A with a relative subwoofer, connected to the speaker terminals of the Marantz amp. For this test I initially left it switched off, since I didn't have overs under the sub. But when, after the listening test, it was switched on again and with the overs still in situ, I was rather surprised how fantastic setup 2A now sounded. And when I started to think about it, it does make sense. Our hearing analyzes sound on the attack primarily. So not the low frequencies coming from the sub, but the combination of the low frequencies coming from the sub and the mid-range coming from the left and right speakers. If the left and right speakers have less time smearing, due to less vibration in the speakers and stands, our auditory system appreciates that. This is the third product by Stack Audio I have reviewed in a short time. And that has a reason. This new patent pending OVA technology does great things to your stereo. The OVA 50s bring it in reach of a larger public. The 30 day money back guarantee makes it easy to try them at home. But think before ordering if you can't spare the money. And on that pump shell we come to the end of this video. As usual, there will be a new video next Friday at 5pm central european time. If you don't want to miss that, subscribe to my channel or follow me on the social media so you will be informed when new videos are out. Help me reach even more people by giving this video a thumb up or link to this video in the social media. It is much appreciated. Many thanks to those viewers that support this channel financially. It keeps me independent and lets me improve the channel further. If that makes you feel like supporting my work too, the links are in the comments below this video on YouTube. I'm Hans Beekhuyzen. Thank you for watching and see you next Friday. And whatever you do, enjoy the music.