{"product_id":"valvet-e4-mono-endstufen","title":"Valvet E4 Class-A Mono Power Amplifiers (Pair)","description":"\u003cp\u003eThe Valvet E4 is a pair of Class-A monoblock power amplifiers in single-ended design, one chassis per channel.\u003c\/p\u003e\n\u003cp\u003eWhere the Valvet E3 houses both channels dual-mono in a single chassis, the E4 takes the final step: two completely independent monoblocks, each with its own 500 VA toroidal transformer, its own rectification via four ultra-fast 60 A individual diodes and its own filtering via four Supertech TTN electrolytic capacitors. The galvanic isolation of the channels is thus complete – no shared power supply for the channels to split.\u003c\/p\u003e\n\u003ch2\u003eWhy the Valvet E4?\u003c\/h2\u003e\n\u003cp\u003eBecause it carries the single-ended Class-A philosophy through to its logical conclusion: one power transistor per amplifier, short pure-silver signal paths, Furutech IEC mains inlets and WBT-NextGen connectors for RCA, XLR and speakers. Supplied as a pair, so both channels are identically built from the start – not two individual units put together at random.\u003c\/p\u003e\n\u003ch2\u003eWhat you hear\u003c\/h2\u003e\n\u003cp\u003eThe same direct, harmonic signature as the E3 – but with even less mutual interference between the channels thanks to the separate chassis. At 12 and 20 watts per monoblock respectively, the E4 remains an amplifier for efficient speakers, not for raw wattage.\u003c\/p\u003e\n\u003ch3\u003eWho is the E4 suited for – and who isn't it for?\u003c\/h3\u003e\n\u003cp\u003eStraight talk: the E4 is for anyone who wants to push the E3's sound to its ultimate consequence and is willing to accept two chassis instead of one in the rack. On efficient speakers (from about 89 dB), it plays to its strengths; on hard-to-drive compact speakers, 12\/20 watts gets tight – there, the push-pull models A4.5 or A4e are the more consistent choice.\u003c\/p\u003e\n\u003ch2\u003eOur verdict\u003c\/h2\u003e\n\u003cp\u003eThe E4 is the E3 without compromise on the chassis – two completely independent monoblocks for anyone who wants maximum channel separation. Tell us which speakers and which room you're working with, and together we'll clarify whether the E4 or rather a push-pull model suits you.\u003c\/p\u003e\n\u003ch2\u003eTechnical data – Valvet E4\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Class-A monoblock power amplifiers, single-ended, sold as a pair\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmplification principle:\u003c\/strong\u003e one power transistor per amplifier\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower per monoblock:\u003c\/strong\u003e 12 W into 8 Ω \/ 20 W into 4 Ω\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGain:\u003c\/strong\u003e approx. 21 dB (up to 30 dB on request)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInputs:\u003c\/strong\u003e WBT-NextGen RCA and Neutrik XLR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput impedance:\u003c\/strong\u003e 50 kΩ\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutputs:\u003c\/strong\u003e WBT-NextGen speaker terminals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower supply per monoblock:\u003c\/strong\u003e 500 VA toroidal transformer, 4 ultra-fast 60 A individual diodes, 4 Supertech TTN capacitors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal path:\u003c\/strong\u003e short, wired throughout in pure silver\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMains inlet:\u003c\/strong\u003e Furutech IEC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHousing:\u003c\/strong\u003e aluminum, black or silver anodized, chrome only on explicit request\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended speaker efficiency:\u003c\/strong\u003e from approx. 89 dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions per monoblock (W×H×D):\u003c\/strong\u003e 23 × 11 × 31 cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e pair (2 chassis)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e handmade in Germany\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eWhy monoblocks instead of a stereo amplifier like the E3?\u003c\/h3\u003e\n\u003cp\u003eTwo completely independent chassis, each with its own power supply, fully separate the channels – no shared transformer, no shared filtering. This is the ultimate consequence of the single-ended principle that the E3 already hints at within a stereo chassis.\u003c\/p\u003e\n\u003ch3\u003eWhich speakers suit the E4?\u003c\/h3\u003e\n\u003cp\u003eAs with the E3: from about 89 dB efficiency upward, the E4 plays to its strengths. At 12\/20 watts per monoblock, it isn't an amplifier for hard-to-drive compact speakers.\u003c\/p\u003e\n\u003ch3\u003eWhat distinguishes the E4 from the A4.5?\u003c\/h3\u003e\n\u003cp\u003eThe E4 works in single-ended design with one transistor per amplifier and delivers 12\/20 watts; the A4.5 works in push-pull design with a transistor pair and delivers 60\/100 watts. Both are Class-A monoblocks but differ clearly in power and sonic character.\u003c\/p\u003e\n\u003ch3\u003eIs the E4 sold as a pair or individually?\u003c\/h3\u003e\n\u003cp\u003eAs a pair – two identically built monoblocks for left and right. This way both channels are identically constructed and calibrated from the start.\u003c\/p\u003e\n\u003ch3\u003eWhy buy the Valvet E4 at HD Zürisee?\u003c\/h3\u003e\n\u003cp\u003eBecause monoblocks only show their full potential with the right preamp and matching speakers. We advise you in Wädenswil on the system combination and handle installation with our own technician.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGoes well with:\u003c\/strong\u003e matching \u003ca href=\"\/en\/collections\/vorverstarker\"\u003epreamplifiers\u003c\/a\u003e, efficient \u003ca href=\"\/en\/collections\/regallautsprecher\"\u003ebookshelf speakers\u003c\/a\u003e and the right \u003ca href=\"\/en\/collections\/kabel\"\u003ecables\u003c\/a\u003e.\u003c\/p\u003e","brand":"Valvet","offers":[{"title":"Default Title","offer_id":53541816533328,"sku":null,"price":7500.0,"currency_code":"CHF","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0932\/3262\/8048\/files\/valvet-e4-class-a-monoendstufen-frontansicht.jpg?v=1788515201","url":"https:\/\/hdzuerisee.ch\/en\/products\/valvet-e4-mono-endstufen","provider":"HD Zürisee AG","version":"1.0","type":"link"}