{"product_id":"the-monoblock-fosi-v3-mono-amplifier","title":"The Monoblock | Fosi Audio V3 Mono TPA3255 Power Amplifier, 240 W","description":"\u003cdiv class=\"product-narrative\"\u003e\n\u003cp style=\"font-size:18px;font-weight:600;line-height:1.6;\"\u003eTwo channels in one box is a compromise engineers make for cost. A monoblock is what happens when nobody is trying to save a chassis.\u003c\/p\u003e\n\u003cp style=\"line-height:1.85;\"\u003eThe argument for one amplifier per speaker is not exotic. Each channel gets its own power supply, its own ground path and its own thermal budget, so nothing that happens at the left speaker can affect the right one. Stereo separation, noise floor and transient behaviour all improve, and no amount of cleverness inside a shared chassis replicates it. What has held the idea back is price and size: monoblocks were traditionally large, hot and expensive. The V3 Mono is none of those. It is a 240 watt desktop monoblock, and the design deliberately scales, so you buy one for a centre channel, two for a pair of bookshelf speakers, or five for a surround system built from identical parts.\u003c\/p\u003e\n\u003cp style=\"line-height:1.85;\"\u003eThe amplifier uses the TPA3255 class D chip with PFFB post filter feedback, which corrects the load dependent behaviour that class D designs normally show in the top octave. Component selection is specific rather than generic: Japanese NICHICON and ELNA capacitors, German WIMA capacitors and Sumida inductors from Japan, all inside a metal chassis. The measurements back the approach, with a SINAD of up to 93 dB through the RCA input and 101 dB through the balanced input, a signal to noise ratio reaching 123 dB, and a noise floor of 31 microvolts. Inputs cover both RCA and balanced XLR or 6.35 mm TRS, and the RCA path offers two gain settings, 19 dB or 25 dB, selectable from the front panel.\u003c\/p\u003e\n\u003cp style=\"line-height:1.85;\"\u003eBuy the V3 Mono when you want to build a system by adding identical blocks rather than replacing a whole amplifier. One unit drives a centre or a passive subwoofer channel, two form a stereo pair with genuine channel isolation, and adding a third, fourth or fifth extends the same architecture into a home theatre without a change of character. The 48 volt supply options cover the power budget, with a 5 amp unit for a single amplifier and 10 amp options with filtering or fan cooling for multi-channel builds. Choose the bundle that matches your speaker sensitivity, and add units later as the system grows.\u003c\/p\u003e\n\u003cp style=\"font-style:italic;color:#444;line-height:1.8;\"\u003eOne amplifier per speaker is not excess. It is the shortest path between the source and the driver.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003chr style=\"margin:26px 0;border:0;border-top:1px solid #eee;\"\u003e\n\u003cdiv class=\"product-features\"\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul style=\"list-style:none;padding:0;margin:0;\"\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e✦ Monoblock architecture: one amplifier per channel with isolated power and ground\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e✦ TPA3255 class D chip with PFFB post filter feedback for linear high frequency response\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e✦ 240 W maximum power output per unit\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e✦ RCA and balanced inputs accepting XLR and 6.35 mm TRS connectors\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e✦ Two RCA gain settings, 19 dB and 25 dB, switchable from the front panel\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e✦ SINAD up to 101 dB on the balanced input, SNR up to 123 dB, noise floor 31 microvolts\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e✦ NICHICON, ELNA, WIMA and Sumida components in a metal chassis\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003chr style=\"margin:26px 0;border:0;border-top:1px solid #eee;\"\u003e\n\u003cdiv class=\"product-specs\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul style=\"list-style:none;padding:0;margin:0;\"\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eAmplifier chip:\u003c\/strong\u003e TPA3255 class D with PFFB post filter feedback\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Monoblock, one channel per unit\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eMaximum output power:\u003c\/strong\u003e 240 W\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eInputs:\u003c\/strong\u003e RCA, balanced XLR and 6.35 mm TRS\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eGain settings:\u003c\/strong\u003e 19 dB and 25 dB on the RCA input\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eSINAD:\u003c\/strong\u003e Up to 93 dB via RCA, up to 101 dB via balanced input\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eSignal to noise ratio:\u003c\/strong\u003e Up to 123 dB\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eNoise floor:\u003c\/strong\u003e 31 microvolts\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eCapacitors:\u003c\/strong\u003e NICHICON and ELNA (Japan), WIMA (Germany)\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eInductors:\u003c\/strong\u003e Sumida (Japan)\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eEnclosure:\u003c\/strong\u003e Metal chassis\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003ePower supply options:\u003c\/strong\u003e 48 V 5 A for single units, 48 V 10 A with filtering or fan cooling for multi-channel builds\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eSystem configurations:\u003c\/strong\u003e Single channel up to 2, 2.1, 3, 4 or 5 channel systems\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eCertification:\u003c\/strong\u003e CE\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003chr style=\"margin:26px 0;border:0;border-top:1px solid #eee;\"\u003e\n\u003cdiv class=\"product-applications\"\u003e\n\u003ch3\u003eApplication Scenarios\u003c\/h3\u003e\n\u003cp style=\"line-height:1.85;\"\u003eThe V3 Mono suits the listener who is building a system in stages rather than buying it whole. A pair drives bookshelf speakers on a desk or in a small room with channel isolation that a stereo chassis cannot match. A single unit powers a centre channel or a passive subwoofer in a home theatre, where the 240 watt output and 31 microvolt noise floor keep dialogue clean. Installers use identical blocks across a five channel system because matching parts make level and character consistent without measuring each amplifier. Because each unit takes standard analogue inputs, the same design works with a desktop DAC, a preamp or an AV processor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003chr style=\"margin:26px 0;border:0;border-top:1px solid #eee;\"\u003e\n\u003cdiv class=\"product-faq\"\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdiv style=\"margin-bottom:16px;\"\u003e\n\u003cp style=\"margin:0 0 6px 0;\"\u003e\u003cstrong\u003eQ: How many units do I need for stereo?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0;color:#555;line-height:1.75;\"\u003eTwo. Each V3 Mono drives one speaker, which is the point of the design: separate power supplies and separate ground paths for left and right.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:16px;\"\u003e\n\u003cp style=\"margin:0 0 6px 0;\"\u003e\u003cstrong\u003eQ: Can I add channels later?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0;color:#555;line-height:1.75;\"\u003eYes. The architecture scales from one channel to two, 2.1, three, four or five channel systems by adding identical units.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:16px;\"\u003e\n\u003cp style=\"margin:0 0 6px 0;\"\u003e\u003cstrong\u003eQ: Do I need the 10 amp power supply?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0;color:#555;line-height:1.75;\"\u003eA 48 volt 5 amp supply suits a single amplifier or a stereo pair used at moderate levels. The 10 amp options include power filtering or fan cooling and are intended for multi-channel builds running hard.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:16px;\"\u003e\n\u003cp style=\"margin:0 0 6px 0;\"\u003e\u003cstrong\u003eQ: What is PFFB and why does it matter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0;color:#555;line-height:1.75;\"\u003ePost filter feedback corrects the load dependent frequency response that class D amplifiers typically show near the top of the audio band, keeping the output linear into real speakers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:16px;\"\u003e\n\u003cp style=\"margin:0 0 6px 0;\"\u003e\u003cstrong\u003eQ: Does it accept a balanced source?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0;color:#555;line-height:1.75;\"\u003eYes. The balanced input accepts XLR and 6.35 mm TRS connectors, with SINAD measuring up to 101 dB on that path.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:16px;\"\u003e\n\u003cp style=\"margin:0 0 6px 0;\"\u003e\u003cstrong\u003eQ: Is it suitable for a subwoofer?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0;color:#555;line-height:1.75;\"\u003eA single unit drives a passive subwoofer channel at up to 240 watts, though for high excursion designs check the impedance and power requirement of your driver.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr style=\"margin:26px 0;border:0;border-top:1px solid #eee;\"\u003e\n\u003cdiv class=\"eastsupplier-promise\"\u003e\n\u003ch3\u003eThe EastSupplier Promise\u003c\/h3\u003e\n\u003cp style=\"line-height:1.85;\"\u003eEvery EastSupplier order is inspected before dispatch, tracked end to end, and backed by a support team that answers. If a unit arrives damaged, or the item you receive does not match the specification printed here, we replace it or refund it. You are buying a product, not a promise you have to chase.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-gallery\" style=\"margin-top:30px;text-align:center;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S77aefe694cd34355ab8a08ebe24812f1h_259f2e6f-7703-425e-8655-8518178c45fe.webp?v=1791342828\" alt=\"The Monoblock | Fosi Audio V3 Mono TPA3255 Power Amplifier, 240 W\" loading=\"lazy\" style=\"max-width:100%;height:auto;margin:8px 0;border-radius:6px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/A0fa0ab6b91a547cf9221197fdfa65d2dA_43eeecfa-8e8d-4b05-820e-c44180748774.webp?v=1791342828\" alt=\"The Monoblock | Fosi Audio V3 Mono TPA3255 Power Amplifier, 240 W\" loading=\"lazy\" style=\"max-width:100%;height:auto;margin:8px 0;border-radius:6px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Afc6d03a1f86a4cf496e0a9b6fb13a718q_1533d4fa-a326-4934-886b-42c64b4dd4a4.webp?v=1791342828\" alt=\"The Monoblock | Fosi Audio V3 Mono TPA3255 Power Amplifier, 240 W\" loading=\"lazy\" style=\"max-width:100%;height:auto;margin:8px 0;border-radius:6px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/A029e020e33f145f2a4b91638462457849_96e44e4e-056a-4573-95cc-8f01ddcff066.webp?v=1791342828\" alt=\"The Monoblock | Fosi Audio V3 Mono TPA3255 Power Amplifier, 240 W\" loading=\"lazy\" style=\"max-width:100%;height:auto;margin:8px 0;border-radius:6px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Ad662bf5f70dd4546820213a2d6d47204q_39a181fc-8d9d-4f11-8321-76c85fc4f92d.webp?v=1791342828\" alt=\"The Monoblock | Fosi Audio V3 Mono TPA3255 Power Amplifier, 240 W\" loading=\"lazy\" style=\"max-width:100%;height:auto;margin:8px 0;border-radius:6px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Ae172c09eb04448cb8d5e12d5cefeeac7e_a7ce48f1-3c51-43e8-a573-d44625033d1b.webp?v=1791342828\" alt=\"The Monoblock | Fosi Audio V3 Mono TPA3255 Power Amplifier, 240 W\" loading=\"lazy\" style=\"max-width:100%;height:auto;margin:8px 0;border-radius:6px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/A87f38b82b51745848073f0ece7f7f7cfM_d9eb9bdc-baf3-4754-8e7e-dbdc8534f630.webp?v=1791342828\" alt=\"The Monoblock | Fosi Audio V3 Mono TPA3255 Power Amplifier, 240 W\" loading=\"lazy\" style=\"max-width:100%;height:auto;margin:8px 0;border-radius:6px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Ad314443154f74f04a75a49f15c16f854U_1b646ff7-1c30-44e9-ac7e-f9ca6ea49219.webp?v=1791342828\" alt=\"The Monoblock | Fosi Audio V3 Mono TPA3255 Power Amplifier, 240 W\" loading=\"lazy\" style=\"max-width:100%;height:auto;margin:8px 0;border-radius:6px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Abb8400f5b62648699eadc8c0efcf71eaA_07db88d0-3a72-4404-8e58-093b3b0f6580.webp?v=1791342828\" alt=\"The Monoblock | Fosi Audio V3 Mono TPA3255 Power Amplifier, 240 W\" loading=\"lazy\" style=\"max-width:100%;height:auto;margin:8px 0;border-radius:6px;\"\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"The Monoblock | Fosi Audio V3 Mono TPA3255 Power Amplifier, 240 W\",\n  \"image\": [\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S77aefe694cd34355ab8a08ebe24812f1h_259f2e6f-7703-425e-8655-8518178c45fe.webp?v=1791342828\"],\n  \"description\": \"Two channels in one box is a compromise engineers make for cost. 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