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Korg Opsix six-operator FM synthesizer

Marsoni M251S
Sale price$669.50
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Get it in 3 business days with 1 day shipping. Friday, May 29
Korg Opsix six-operator FM synthesizerThe Korg opsix represents a new and expansive reimagination of classic digital synthesis. Much like Korg did when bringing wave sequencing back in a more powerful, more musical, and more immediately accessible way with wavestate, so was the approach to FM sound generation on the opsix, resulting in another incredibly flexible and unique synth. The opsix is an altered six operator FM synthesizer. With its astoundingly accessible operator mixer and
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  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
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4.1 ★★★★★
Based on 731 reviews
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RJ
San Leandro, US
★★★★★ 5
Good deal and good quality!
Style: Black 10 Pack, Size: 9.25 inch
Sturdy and as advertised. Just like you’d get at big box store but much better price!
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Reviewed in the United States on May 16, 2026
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Obo Nosyal
Louisville, US
★★★★★ 5
Sturdy
Style: Black 4 Pack, Size: 5.5 inch, Style: Black 4 Pack, Size: 5.5 inch
Brackets worked great. Very sturdy. Used them to fabricate a bath shelf and towel rack.
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Reviewed in the United States on April 20, 2026
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Andrew Heidrich
Lexington, US
★★★★★ 5
The screws are the best part
Style: Black 6 Pack, Size: 11.25 inch, Style: Black 6 Pack, Size: 11.25 inch
OK. So I spend a lot on (and I mean A LOT) on Amazon and I never write reviews. Just not my thing. But I had to write a review for this product. These brackets are fantastic - attractive, sturdy. But what threw me was the screws - they are SUCH high quality. They don't strip or lose their black color at all even when your drill, set to 0 slip, loses grip repeatedly because you drilled the pilot hole too small and are throwing every ounce of your body weight against it to get it to drive. And they give you extra! Like, enough to mount 8.5 brackets in a 6-bracket box. I am saving alllllll of these extra screws; if I could buy them separate I would. It might seem like a small thing but hardware is usually a place companies skimp on HARD, and to be confronted with such quality was truly a breath of fresh air. The brackets take some mounting expertise to ensure everything is true - lots of measuring and leveling (some minor differences in angle + or - a couple degrees, but they're SOLID. I will be buying these again in the future. Kudos for an awesome product.
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Reviewed in the United States on August 20, 2024
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Amazon Customer
Los Angeles, US
★★★★★ 5
Sturdy
Style: Black 6 Pack, Size: 5.5 inch
I put them up and forgot about them. Worked perfect, look great.
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Reviewed in the United States on May 23, 2026
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adrian gonzalez
Louisville, US
★★★★★ 4
Works as intended
Style: Black 6 Pack, Size: 7.25 inch
It works as it should. I does look like it bends down after screwing to the wall but the level seemed spot on. Either way it hold up my shelf great
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Reviewed in the United States on January 17, 2026

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