{"product_id":"kecess300plus","title":"KECES S300+ Power Amplifier","description":"\u003cp\u003eThe KECES S300+ is a compact, powerful stereo power amplifier in high-bias Class A\/AB technology – the first watts run in pure Class A, above that the more efficient Class AB takes over.\u003c\/p\u003e\n\u003cp\u003eBehind the slender format is a dual-mono build with a massive power supply. Supplied as a single unit – selectable as stereo, bi-amp, or bridged as mono.\u003c\/p\u003e\n\u003ch2\u003eWhy the KECES S300+?\u003c\/h2\u003e\n\u003cp\u003eBecause it combines power with control. A 1.2 kVA toroidal transformer with separate windings per channel and 65,600 µF of Rubycon filter capacitance deliver stable energy even on bass transients; up to 45 A peak current per channel keeps the amplifier on course even at impedance dips below 2 Ω. A JFET input and MOSFET drivers give it a smooth character.\u003c\/p\u003e\n\u003ch2\u003eWhat you hear\u003c\/h2\u003e\n\u003cp\u003eControl and fine detail: the first 5 watts in pure Class A reveal the finest nuances, and the high damping factor keeps difficult speakers on a short leash. The direct-coupled signal path (no capacitors\/coils in the way) keeps the signal pure.\u003c\/p\u003e\n\u003ch3\u003eWho is the S300+ suited for – and who isn't it for?\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003ePlain talk:\u003c\/strong\u003e the S300+ is an honest workhorse with no light show – if you want blinking LED chains, look elsewhere. In high-bias operation it runs warm and doesn't belong in a closed cabinet without airflow. If you have a preamp and want controlled power (including for inefficient speakers), you're in exactly the right place.\u003c\/p\u003e\n\u003ch3\u003eCan I use the S300+ as a monoblock later?\u003c\/h3\u003e\n\u003cp\u003eYes. Bridged, it delivers 1× 410 W at 8 Ω – so you can expand a pair into a mono power amp combination.\u003c\/p\u003e\n\u003ch2\u003eOur verdict\u003c\/h2\u003e\n\u003cp\u003eA lot of power amp in a small footprint: powerful, controlled, cleanly built – with Class A finesse at low levels. At HD Zürisee in Wädenswil, we advise you on the right speaker combination.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAwarded:\u003c\/strong\u003e the \"5 Hearts Award\" from the British trade press (\u003cem\u003eHifi Pig, 2024\u003c\/em\u003e) – praised for the effortless power and control reserves with which it lets suitable speakers bloom.\u003c\/p\u003e\n\u003ch2\u003eTechnical Data – KECES S300+\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eType: stereo power amplifier, high-bias Class A\/AB (dual mono)\u003c\/li\u003e\n\u003cli\u003eContinuous power: 2× 130 W \/ 8 Ω · 2× 225 W \/ 4 Ω\u003c\/li\u003e\n\u003cli\u003ePeak power: 2× 240 W \/ 8 Ω · 2× 300 W \/ 4 Ω\u003c\/li\u003e\n\u003cli\u003eBridged mode (mono): 1× 410 W \/ 8 Ω\u003c\/li\u003e\n\u003cli\u003ePeak current: 45 A per channel\u003c\/li\u003e\n\u003cli\u003ePower supply: 1.2 kVA toroidal transformer, 65,600 µF Rubycon; separate power supplies for input, driver, output\u003c\/li\u003e\n\u003cli\u003eTopology: JFET input, MOSFET drivers, direct-coupled\u003c\/li\u003e\n\u003cli\u003eModes: stereo, bi-amp, bridged (mono)\u003c\/li\u003e\n\u003cli\u003eConnections: Neutrik XLR (locking), gold-plated RCA, 5-way binding posts; 12 V trigger\u003c\/li\u003e\n\u003cli\u003eProtection: DC servo, overload, over-temperature and inrush current protection\u003c\/li\u003e\n\u003cli\u003eDimensions (W×D×H): 300 × 279 × 133 mm\u003c\/li\u003e\n\u003cli\u003eWeight: 14 kg\u003c\/li\u003e\n\u003cli\u003eIncluded: S300+, mains cable, manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat does \"high-bias Class A\/AB\" mean in practice?\u003c\/h3\u003e\n\u003cp\u003eAt low levels the amplifier works like a pure Class A amp (very clean, warm); only at higher levels does it switch to the more efficient Class AB operation.\u003c\/p\u003e\n\u003ch3\u003eDoes the S300+ also drive difficult speakers?\u003c\/h3\u003e\n\u003cp\u003eYes – thanks to the 1.2 kVA transformer, high damping factor and 45 A peak current, it stays stable even at low impedance. We work out the right combination with you.\u003c\/p\u003e\n\u003ch3\u003eWhy buy the KECES S300+ from HD Zürisee?\u003c\/h3\u003e\n\u003cp\u003eBecause a power amp lives off the preamp and speakers. We advise you on the combination and deliver with our own technician – in Wädenswil. Free shipping from CHF 190.\u003c\/p\u003e\n\u003ch2\u003eGoes well with\u003c\/h2\u003e\n\u003cp\u003eA matching preamp (e.g. the \u003ca href=\"\/en-ch\/collections\/kopfhorerverstarker\"\u003eKECES S3\u003c\/a\u003e as pre), more \u003ca href=\"\/en-ch\/collections\/endstufen\"\u003epower amplifiers\u003c\/a\u003e and good \u003ca href=\"\/en-ch\/collections\/kabel\"\u003ecables\u003c\/a\u003e.\u003c\/p\u003e","brand":"Keces","offers":[{"title":"Default Title","offer_id":52989536076112,"sku":null,"price":4300.0,"currency_code":"CHF","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0932\/3262\/8048\/files\/keces-s300-plus-endstufe-frontansicht.jpg?v=1785424390","url":"https:\/\/hdzuerisee.ch\/en-ch\/products\/kecess300plus","provider":"HD Zürisee AG","version":"1.0","type":"link"}