{"product_id":"ultrafide-u500dc-power-amplifier-ex-demonstration","title":"Ultrafide U500DC Power Amplifier - Ex-Demonstration","description":"\u003cstyle\u003e\n  .hb-tabs { margin: 18px 0; border: 1px solid rgba(0,0,0,0.12); border-radius: 10px; overflow: hidden; }\n  .hb-tabs input { display: none; }\n  .hb-tab-labels { display: flex; gap: 0; border-bottom: 1px solid rgba(0,0,0,0.12); background: rgba(0,0,0,0.03); }\n  .hb-tab-labels label {\n    flex: 1;\n    padding: 12px 14px;\n    cursor: pointer;\n    font-weight: 600;\n    text-align: center;\n    user-select: none;\n  }\n  .hb-panels { padding: 14px 16px; background: #fff; }\n  .hb-panel { display: none; }\n\n  #hb-ultrafide-u500dc-tab-1:checked ~ .hb-tab-labels label[for=\"hb-ultrafide-u500dc-tab-1\"],\n  #hb-ultrafide-u500dc-tab-2:checked ~ .hb-tab-labels label[for=\"hb-ultrafide-u500dc-tab-2\"] {\n    background: #fff;\n    border-bottom: 2px solid rgba(0,0,0,0.65);\n  }\n\n  #hb-ultrafide-u500dc-tab-1:checked ~ .hb-panels #hb-ultrafide-u500dc-panel-1,\n  #hb-ultrafide-u500dc-tab-2:checked ~ .hb-panels #hb-ultrafide-u500dc-panel-2 {\n    display: block;\n  }\n\n  .hb-panels h3 { margin: 18px 0 12px; font-size: 1.05em; }\n  .hb-panels p { margin: 20px 0 6px; }\n  .hb-panels ul { margin: 8px 0 20px 18px; }\n\u003c\/style\u003e\n\u003cdiv class=\"hb-tabs\"\u003e\n\u003cinput checked id=\"hb-ultrafide-u500dc-tab-1\" name=\"hb-ultrafide-u500dc-tabs\" type=\"radio\"\u003e \u003cinput id=\"hb-ultrafide-u500dc-tab-2\" name=\"hb-ultrafide-u500dc-tabs\" type=\"radio\"\u003e\n\u003cdiv class=\"hb-tab-labels\"\u003e\n\u003clabel for=\"hb-ultrafide-u500dc-tab-1\"\u003eProduct Summary \u0026amp; Benefits\u003c\/label\u003e \u003clabel for=\"hb-ultrafide-u500dc-tab-2\"\u003eTech Specs \u0026amp; Box Contents\u003c\/label\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hb-panels\"\u003e\n\u003cdiv id=\"hb-ultrafide-u500dc-panel-1\" class=\"hb-panel\"\u003e\n\u003ch3\u003eProduct Summary\u003c\/h3\u003e\n\u003cp\u003eThe Ultrafide U500DC is a high-performance stereo power amplifier designed to bring professional-grade amplifier engineering into a serious home hi-fi system. Handmade in Devon, it draws on decades of experience from MC² Audio’s work in studios, theatres, festivals and live sound, but is built specifically for demanding domestic listening.\u003c\/p\u003e\n\u003cp\u003eDelivering 500 W per channel into 4 Ohms and 250 W per channel into 8 Ohms, the U500DC has the power and control needed to drive a wide range of loudspeakers with confidence. Its dual mono design, oversized 500 VA toroidal transformer and separate power supply architecture help provide strong stereo separation, stable dynamics and controlled low-frequency performance.\u003c\/p\u003e\n\u003cp\u003eUltrafide’s in-house Ultra Sigma topology uses a modern Class D output stage based on Sigma-Delta modulation, partnered with a Class A input driver stage. The amplifier is fully DC coupled from input to output, helping preserve transient accuracy and keep bass response tight, focused and immediate.\u003c\/p\u003e\n\u003cp\u003eA rear-panel sound character switch lets you choose between Pure Timbre for a cleaner reference-style presentation or Vintage for a warmer tonal balance. With RCA and balanced XLR inputs, dual binding posts per channel and passive cooling, the U500DC is a powerful, flexible and refined power amplifier for high-quality stereo systems.\u003c\/p\u003e\n\u003cp\u003eThis is an ex-demonstration model that has been very well cared for. It comes supplied with original boxing and accessories.\u003c\/p\u003e\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDelivers effortless speaker control with 500 W per channel into 4 Ohms and 250 W per channel into 8 Ohms\u003c\/li\u003e\n\u003cli\u003eBrings professional audio amplifier expertise into a high-quality home hi-fi system\u003c\/li\u003e\n\u003cli\u003eDual mono design helps improve stereo separation, focus and dynamic stability\u003c\/li\u003e\n\u003cli\u003eClass A input driver stage and fully DC-coupled signal path support fast, accurate transient response\u003c\/li\u003e\n\u003cli\u003eUltra Sigma Class D topology offers high power, low distortion and efficient operation\u003c\/li\u003e\n\u003cli\u003eMassive 500 VA toroidal transformer and linear power supply help maintain strong, stable delivery\u003c\/li\u003e\n\u003cli\u003ePure Timbre and Vintage modes let you choose between a reference sound or a warmer presentation\u003c\/li\u003e\n\u003cli\u003eBalanced XLR and RCA inputs make it easy to integrate with a wide range of pre-amplifiers\u003c\/li\u003e\n\u003cli\u003ePassive cooling keeps operation quiet with no fan noise in the listening room\u003c\/li\u003e\n\u003cli\u003e5 years manufacturer's warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"hb-ultrafide-u500dc-panel-2\" class=\"hb-panel\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAmplifier Type\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eType: Stereo power amplifier\u003c\/li\u003e\n\u003cli\u003eChannels: 2\u003c\/li\u003e\n\u003cli\u003eDesign Topology: Ultrafide Ultra Sigma Class D topology with Sigma-Delta modulation\u003c\/li\u003e\n\u003cli\u003eInput Driver Stage: Class A\u003c\/li\u003e\n\u003cli\u003eInter-stage Coupling: Fully DC coupled\u003c\/li\u003e\n\u003cli\u003ePower Supply: Oversized linear\/toroidal power supply with 500 VA transformer\u003c\/li\u003e\n\u003cli\u003eCooling: Passive cooling\u003c\/li\u003e\n\u003cli\u003eMade In: Devon, United Kingdom\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePower Output\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRMS Power into 4 Ohms: 500 W per channel\u003c\/li\u003e\n\u003cli\u003eRMS Power into 6 Ohms: 333 W per channel\u003c\/li\u003e\n\u003cli\u003eRMS Power into 8 Ohms: 250 W per channel\u003c\/li\u003e\n\u003cli\u003eRMS Power into 12 Ohms: 166 W per channel\u003c\/li\u003e\n\u003cli\u003eMaximum Voltage: 70 V\u003c\/li\u003e\n\u003cli\u003eMaximum Current: 30 A, pulsed testing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAudio Performance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFrequency Response: 5 Hz – 20 kHz, ±0.3 dB\u003c\/li\u003e\n\u003cli\u003eDistortion: 0.003% at 5 W\u003c\/li\u003e\n\u003cli\u003eDynamic Range: 115 dB, unweighted, 22 Hz – 22 kHz\u003c\/li\u003e\n\u003cli\u003eOutput Impedance: 25 mOhms\u003c\/li\u003e\n\u003cli\u003eInput Impedance: 10 kOhms, RCA and XLR\u003c\/li\u003e\n\u003cli\u003eSensitivity: 2.2 V\u003c\/li\u003e\n\u003cli\u003eVoltage Gain: 26 dB standard factory setting, 29 dB optional high gain setting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eConnections \u0026amp; Controls\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAudio Inputs: 2 × RCA single-ended and 2 × XLR balanced\u003c\/li\u003e\n\u003cli\u003eAudio Outputs: 4 pairs of binding posts\u003c\/li\u003e\n\u003cli\u003eSound Modes: Pure Timbre and Vintage, selected by rear-panel switch\u003c\/li\u003e\n\u003cli\u003ePower Supply Connector: 10 A Furutech C13 IEC\u003c\/li\u003e\n\u003cli\u003ePower Isolation Switch: Rear panel\u003c\/li\u003e\n\u003cli\u003eStandby Switch: Front panel\u003c\/li\u003e\n\u003cli\u003eRemote Standby Connector: Rear panel\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePower Consumption\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOperational Power Consumption: 200 W average, 1000 W maximum\u003c\/li\u003e\n\u003cli\u003eIdle Power Consumption: 15 W\u003c\/li\u003e\n\u003cli\u003eStandby Power Consumption: 1 W\u003c\/li\u003e\n\u003cli\u003eNominal Supply Voltage: 230 V AC 50 Hz or 120 V AC 60 Hz\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePhysical\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDimensions (L × W × H): 382 × 325 × 97 mm\u003c\/li\u003e\n\u003cli\u003eWeight: 13.05 kg\u003c\/li\u003e\n\u003cli\u003ePacked Dimensions (L × W × H): 590 × 405 × 152 mm\u003c\/li\u003e\n\u003cli\u003ePacked Weight: 14.65 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat’s in the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUltrafide U500DC stereo power amplifier\u003c\/li\u003e\n\u003cli\u003eMains power cable\u003c\/li\u003e\n\u003cli\u003eProduct documentation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Ultrafide","offers":[{"title":"Default Title","offer_id":58142083744131,"sku":null,"price":3500.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0160\/4606\/3670\/files\/Untitled_3500_x_3500_px_-_2026-05-09T101638.854.png?v=1778318371","url":"https:\/\/www.holburnonline.co.uk\/products\/ultrafide-u500dc-power-amplifier-ex-demonstration","provider":"Holburn Online","version":"1.0","type":"link"}