{"product_id":"valvet-a4e-mono-endstufen","title":"Valvet A4e Class-A Mono Power Amplifiers (Pair)","description":"\u003cp\u003eThe Valvet A4e is the flagship pair among Valvet's Class-A mono power amplifiers, with external power supplies and active inrush current limiting.\u003c\/p\u003e\n\u003cp\u003eLike the A4.5, the A4e runs in push-pull design, but goes a step further with its power supply: instead of the internal 500 VA transformer, each monoblock brings its own external power supply with an 800 VA transformer – stepped up from 500 VA since July 2023. Active inrush current limiting tames the switch-on surge that a transformer of this size would otherwise cause.\u003c\/p\u003e\n\u003ch2\u003eWhy the Valvet A4e?\u003c\/h2\u003e\n\u003cp\u003eBecause it offers the biggest power reserve and the most elaborate power supply in the Valvet lineup: 65 watts at 8 ohms, 105 watts at 4 ohms, plus 176,000 µF of filter capacitance per monoblock. The external power supplies sit separate from the amplifier housings, keeping transformer stray fields and amplifier electronics cleanly apart. A carbon lid and Furutech rhodium mains inlets round out the equipment.\u003c\/p\u003e\n\u003ch2\u003eWhat you hear\u003c\/h2\u003e\n\u003cp\u003eThe same Class-A calm as the A4.5, but with noticeably more control and drive in dynamic passages – the generously sized, separate power supply pays off especially with demanding speaker loads.\u003c\/p\u003e\n\u003ch3\u003eWho is the A4e suited for – and who isn't it for?\u003c\/h3\u003e\n\u003cp\u003eStraight talk: the A4e is for anyone who wants the maximum power reserve and power-supply effort the Valvet range offers, and is willing to wait for factory production in return. If you want faster delivery or are already happy with the A4.5's power, you save the surcharge and the wait and stick with the A4.5. If you run very demanding or large speakers, on the other hand, you'll benefit from the A4e's extra reserve.\u003c\/p\u003e\n\u003ch2\u003eOur verdict\u003c\/h2\u003e\n\u003cp\u003eThe flagship of the Valvet power amps for anyone who won't compromise on power supply. Tell us which speakers and which room you're working with, and we'll tell you honestly whether the surcharge and longer delivery time over the A4.5 are worth it for you.\u003c\/p\u003e\n\u003ch2\u003eTechnical data – Valvet A4e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Class-A mono power amplifiers, push-pull, sold as a pair, with external power supplies\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmplifier principle:\u003c\/strong\u003e one transistor pair per power amp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower per monoblock:\u003c\/strong\u003e 65 W at 8 Ω \/ 105 W at 4 Ω\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\u003eBandwidth:\u003c\/strong\u003e 0–100 kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilter capacitance:\u003c\/strong\u003e 176,000 µF per monoblock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutputs:\u003c\/strong\u003e WBT NextGen speaker terminals, bi-wiring optional for a surcharge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower supply:\u003c\/strong\u003e external, 800 VA transformer per monoblock with inrush current limiting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMains inlet:\u003c\/strong\u003e Furutech rhodium IEC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHousing:\u003c\/strong\u003e aluminium, 13 mm front panel, silver or black anodised (special gold finish on request), chrome only on explicit request, with carbon lid\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions per amplifier housing (W×H×D):\u003c\/strong\u003e 23 × 13 × 32 cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions per external power supply (W×H×D):\u003c\/strong\u003e 23 × 13 × 32 cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e pair (2 amplifiers + 2 external power supplies)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e made to order, delivery time approx. 3 months\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 does the A4e have external power supplies?\u003c\/h3\u003e\n\u003cp\u003eSo that the generously sized 800 VA transformer stays physically and electrically separate from the sensitive amplifier electronics. This reduces stray fields and allows even more generous filtering with 176,000 µF per monoblock.\u003c\/p\u003e\n\u003ch3\u003eHow long does delivery take?\u003c\/h3\u003e\n\u003cp\u003eThe A4e is built to order in Germany; delivery time is approx. 3 months from the order date. We'll let you know as soon as we've placed your order and what the schedule looks like.\u003c\/p\u003e\n\u003ch3\u003eWhat's the difference between the A4e and the A4.5?\u003c\/h3\u003e\n\u003cp\u003eThe A4e delivers more power (65\/105 instead of 60\/100 watts), brings external instead of internal power supplies with a larger 800 VA transformer and inrush current limiting, and has a carbon lid. In return, it's more expensive and has a longer delivery time.\u003c\/p\u003e\n\u003ch3\u003eIs bi-wiring possible with the A4e?\u003c\/h3\u003e\n\u003cp\u003eYes, for a surcharge, the WBT NextGen speaker terminals are set up for bi-wiring. That lets you wire speakers with separate tweeter and woofer connections directly.\u003c\/p\u003e\n\u003ch3\u003eWhy buy the Valvet A4e from HD Zürisee?\u003c\/h3\u003e\n\u003cp\u003eBecause the surcharge over the A4.5 is only worth it if your speakers and your room actually need the extra reserve. We'll advise you honestly in Wädenswil, order from Valvet, and handle the 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, \u003ca href=\"\/en\/collections\/standlautsprecher\"\u003efloorstanding 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":53541817385296,"sku":null,"price":9900.0,"currency_code":"CHF","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0932\/3262\/8048\/files\/valvet-a4e-class-a-monoendstufen-paaransicht.jpg?v=1788515209","url":"https:\/\/hdzuerisee.ch\/en\/products\/valvet-a4e-mono-endstufen","provider":"HD Zürisee AG","version":"1.0","type":"link"}