{"product_id":"sex-4-kit-for-headphones-speakers","title":"Bottlehead SEX 4 Kit for Headphones \u0026 Speakers","description":"\u003cp\u003eSay hello to the new Single Ended eXperimentation (SEX) kit!\u003c\/p\u003e\n\u003cp\u003eThe SEX 4 has a ton of changes under the hood. For starters, it uses two 6FM7 tubes and a refined circuit to drive more than double the power of the SEX 3. We’ve heard from builders that they’re increasingly using preamps and digital sources, so we’ve removed the volume control. This plus the roomier chassis provides ample opportunity for experimentation.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSpeaking of experimentation, we’ve added a useful experiment to the stock kit. Sitting front and center is a new switch. Flipping it \u003c\/span\u003e\u003cspan\u003econtrols the\u003c\/span\u003e\u003cspan\u003e amount of local, plate-to-plate feedback \u003c\/span\u003e\u003cspan\u003eapplied\u003c\/span\u003e\u003cspan\u003e in the \u003c\/span\u003e\u003cspan\u003ecircuit\u003c\/span\u003e\u003cspan\u003e. What does that mean? The higher feedback allows the SEX to act as a low-gain power amplifier with \u003c\/span\u003e\u003cspan\u003etighter\u003c\/span\u003e\u003cspan\u003e mid- and low-end performance and a blacker background. Switching to lower feedback mode gets you performance closer to a traditional desktop tube headphone amp. You should see more warmth, emotion, and character.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eIn either feedback mode, the SEX 4 feels a lot more controlled than the SEX 3 in the bass department, and the lower gain option mates solidly to a Moreplay and avoids hair trigger volume control issues. We’ve built a bundle so you can buy both the SEX 4 and the Moreplay at a discount.\u003c\/p\u003e\n\u003cp\u003eSEX 4 has a universal power transformer and can be used worldwide by following the wiring instructions in the manual. Please note that \u003cstrong\u003einternational customers will need to provide their own power cord\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eWe're now including the square version of our badge in each amplifier and preamplifier kit. If you prefer the word mark version, please note that in your order.\u003c\/em\u003e\u003c\/p\u003e","brand":"Bottlehead","offers":[{"title":"Default Title","offer_id":55747018359153,"sku":"COMBOK-SEX-4-0","price":885.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/6408\/6641\/files\/more-sex-combo-5145595.png?v=1757954364","url":"https:\/\/bottlehead.mom\/products\/sex-4-kit-for-headphones-speakers","provider":"Bottlehead","version":"1.0","type":"link"}