{"product_id":"koch-st20-h","title":"Koch ST20\/H Studiotone Amplifier Head – 20W Class A, 3 Channels \u0026amp; Recording Output ","description":"\u003carticle class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:1436c29e-083f-463b-82e1-d2a595e3025e-28\" data-testid=\"conversation-turn-58\" data-scroll-anchor=\"true\" data-turn=\"assistant\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:--spacing(4)] thread-sm:[--thread-content-margin:--spacing(6)] thread-lg:[--thread-content-margin:--spacing(16)] px-(--thread-content-margin)\"\u003e\n\n\u003cdiv class=\"[--thread-content-max-width:40rem] thread-lg:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" tabindex=\"-1\"\u003e\n\n\u003cdiv class=\"flex max-w-full flex-col grow\"\u003e\n\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"6a7ad5bf-3d0a-49f6-8a23-d76a95552240\" dir=\"auto\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+\u0026amp;]:mt-5\" data-message-model-slug=\"gpt-4o\"\u003e\n\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[1px]\"\u003e\n\n\u003cdiv class=\"markdown prose dark:prose-invert w-full break-words light markdown-new-styling\"\u003e\n\n \u003cp data-start=\"97\" data-end=\"570\"\u003eThe \u003cstrong data-start=\"127\" data-end=\"153\"\u003eKoch ST20\/H Studiotone\u003c\/strong\u003e is a compact yet exceptionally powerful \u003cstrong data-start=\"195\" data-end=\"210\"\u003e20W Class A\u003c\/strong\u003e tube amplifier head with a versatile tone reminiscent of classic British amplifiers from the 1960s. Thanks to two \u003cstrong data-start=\"337\" data-end=\"356\" data-is-only-node=\"\"\u003eEL84 output tubes\u003c\/strong\u003e , three fully switchable channels (Clean, Overdrive \u0026amp; Overdrive+) and clever voicing options, this top-of-the-line amplifier offers everything from warm, round cleans to saturated, dynamic overdrive with real tube compression.\u003c\/p\u003e\n\n \u003cp data-start=\"572\" data-end=\"1073\"\u003eThe \u003cstrong data-start=\"579\" data-end=\"600\"\u003eMid Shift (2-way)\u003c\/strong\u003e and \u003cstrong data-start=\"604\" data-end=\"622\"\u003eBright (3-way)\u003c\/strong\u003e switches allow you to easily tailor your sound to any playing style. The rear panel offers extensive functionality: a \u003cstrong data-start=\"736\" data-end=\"778\"\u003erecording output with speaker simulation\u003c\/strong\u003e , direct outputs (including headphones), a \u003cstrong data-start=\"829\" data-end=\"843\"\u003ePower Soak\u003c\/strong\u003e , and \u003cstrong data-start=\"847\" data-end=\"876\"\u003ea speaker on\/off switch\u003c\/strong\u003e for silent recording or practicing. Thanks to the \u003cstrong data-start=\"918\" data-end=\"940\"\u003eserial effects loop\u003c\/strong\u003e , \u003cstrong data-start=\"942\" data-end=\"959\"\u003espring reverb\u003c\/strong\u003e , and \u003cstrong data-start=\"963\" data-end=\"990\"\u003emultiple speaker outputs,\u003c\/strong\u003e this amp head is equally suitable for recording sessions and live performances.\u003c\/p\u003e\n\n\u003cp data-start=\"1075\" data-end=\"1095\"\u003e \u003cstrong data-start=\"1075\" data-end=\"1093\"\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli data-start=\"1098\" data-end=\"1133\"\u003e Type: Class A tube amplifier head\u003c\/li\u003e\n\n\u003cli data-start=\"1136\" data-end=\"1155\"\u003e Power: 20 watts\u003c\/li\u003e\n\n\u003cli data-start=\"1158\" data-end=\"1179\"\u003e Output tubes: 2x EL84\u003c\/li\u003e\n\n \u003cli data-start=\"1182\" data-end=\"1254\"\u003eChannels: 3 (Clean, Overdrive, Overdrive+) – switchable via footswitch\u003c\/li\u003e\n\n\u003cli data-start=\"1257\" data-end=\"1299\"\u003e Tone Controls: Passive Bass, Mid, Treble\u003c\/li\u003e\n\n\u003cli data-start=\"1302\" data-end=\"1321\"\u003e Voicing switches:\u003c\/li\u003e\n\n\u003cli data-start=\"1326\" data-end=\"1345\"\u003e Mid Shift (2-way)\u003c\/li\u003e\n\n\u003cli data-start=\"1350\" data-end=\"1366\"\u003e Bright (3-way)\u003c\/li\u003e\n\n\u003cli data-start=\"1369\" data-end=\"1412\"\u003e Reverb: Spring type (Short Hall, 3 springs)\u003c\/li\u003e\n\n\u003cli data-start=\"1415\" data-end=\"1445\"\u003e Effect loop: Serial, -10 dBV\u003c\/li\u003e\n\n\u003cli data-start=\"1448\" data-end=\"1507\"\u003e Recording output with speaker simulation and two voicing filters\u003c\/li\u003e\n\n\u003cli data-start=\"1510\" data-end=\"1527\"\u003e Direct outputs:\u003c\/li\u003e\n\n\u003cli data-start=\"1532\" data-end=\"1545\"\u003e Unfiltered\u003c\/li\u003e\n\n\u003cli data-start=\"1550\" data-end=\"1565\"\u003e Clean channel\u003c\/li\u003e\n\n\u003cli data-start=\"1570\" data-end=\"1585\"\u003e Headphone out\u003c\/li\u003e\n\n\u003cli data-start=\"1588\" data-end=\"1621\"\u003e Speaker outputs: 4, 8 and 16 Ohms\u003c\/li\u003e\n\n\u003cli data-start=\"1624\" data-end=\"1652\"\u003e Speaker on\/off switch\u003c\/li\u003e\n\n\u003cli data-start=\"1655\" data-end=\"1675\"\u003e Power Soak function\u003c\/li\u003e\n\n\u003cli data-start=\"1678\" data-end=\"1709\"\u003e Included: 2-way footswitch\u003c\/li\u003e\n\n\u003cli data-start=\"1712\" data-end=\"1743\"\u003e Dimensions: 44 x 23 x 24.5 cm\u003c\/li\u003e\n\n\u003cli data-start=\"1746\" data-end=\"1760\"\u003e Weight: 10 kg \u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"z-0 flex min-h-[46px] justify-start\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\n\n\u003cdiv class=\"text-center\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/article\u003e\n\u003cdiv aria-hidden=\"true\" data-edge=\"true\" class=\"pointer-events-none h-px w-px\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\n\u003cp\u003e\u003c\/p\u003e","brand":"Koch","offers":[{"title":"Default Title","offer_id":56080664297845,"sku":"ST20\/H","price":1239.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0824\/8449\/4657\/files\/54000_54135.jpg?v=1760112971","url":"https:\/\/vdsinstrumenten.fr\/products\/koch-st20-h","provider":"VDS instrumenten","version":"1.0","type":"link"}