{"product_id":"soundqubed-sq-hdc-1hdp-8-4-5-horn-diffuser-1-phenolic-driver-each","title":"SoundQubed SQ-HDC-1HDP-8 4.5\" Horn Diffuser + 1\" Phenolic Driver (each)","description":"\u003ch2\u003e\n\u003cstrong\u003eSoundQubed SQ-HDC-1HDP-8\u003c\/strong\u003e — 4.5\" Horn Diffuser + 1\" Phenolic VC Driver | Neodymium Magnet | 108 dB | 8Ω | Sold Single\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eSoundQubed SQ-HDC-1HDP-8\u003c\/strong\u003e is a high-output 4.5\" horn diffuser and 1\" phenolic compression driver system engineered for competition car audio, pro audio front stage builds, and any application where maximum high-frequency output and pattern control are the priority. Featuring a \u003cstrong\u003ephenolic diaphragm\u003c\/strong\u003e, \u003cstrong\u003eCCAW winding\u003c\/strong\u003e on a \u003cstrong\u003eKapton former\u003c\/strong\u003e, a \u003cstrong\u003eneodymium magnet (0.96\" x 0.19\" \/ 24.5x5mm)\u003c\/strong\u003e, an \u003cstrong\u003ealuminum driver body\u003c\/strong\u003e, and a \u003cstrong\u003e4.5\" ABS horn\u003c\/strong\u003e with \u003cstrong\u003e35° rounded sound coverage\u003c\/strong\u003e, the SQ-HDC-1HDP-8 delivers \u003cstrong\u003e60W continuous \/ 120W RMS \/ 240W max\u003c\/strong\u003e at a staggering \u003cstrong\u003e108 dB sensitivity with horn\u003c\/strong\u003e and a frequency response of \u003cstrong\u003e1.5 kHz–18 kHz\u003c\/strong\u003e at \u003cstrong\u003e8Ω\u003c\/strong\u003e. Sold as a single unit.\u003c\/p\u003e\n\u003cp\u003eThe SQ-HDC-1HDP-8’s \u003cstrong\u003ephenolic diaphragm\u003c\/strong\u003e is a classic pro audio compression driver material — known for its warm, smooth high-frequency character, excellent power handling, and long-term durability under sustained high-power use. The \u003cstrong\u003e4.5\" ABS horn\u003c\/strong\u003e with \u003cstrong\u003e35° rounded coverage pattern\u003c\/strong\u003e and \u003cstrong\u003e1\" \/ 25.4mm throat diameter\u003c\/strong\u003e focuses the driver’s output for maximum SPL and pattern control — delivering \u003cstrong\u003e108 dB sensitivity\u003c\/strong\u003e that makes this one of the highest-output horn driver systems available for car audio applications. At \u003cstrong\u003e8Ω\u003c\/strong\u003e, the SQ-HDC-1HDP-8 is ideal for multi-driver parallel wiring configurations or pro audio amplifiers rated at 8Ω.\u003c\/p\u003e\n\u003cp\u003eWhether you’re building a competition SPL or SQL system, a high-output demo build, or a multi-driver pro audio front stage, the SQ-HDC-1HDP-8 delivers the output, pattern control, and durability to compete at the highest level.\u003c\/p\u003e\n\u003ch2\u003eWhy Choose the SoundQubed SQ-HDC-1HDP-8?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e108 dB Sensitivity (1W\/1m) With Horn\u003c\/strong\u003e — One of the highest-output horn driver systems available for car audio — delivers massive high-frequency SPL with minimal amplification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e60W Continuous \/ 120W RMS \/ 240W MAX @ 8Ω\u003c\/strong\u003e — Pro-grade power handling for a compression horn driver — handles sustained high-power use in competition builds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhenolic Diaphragm\u003c\/strong\u003e — Classic pro audio compression driver material — warm, smooth high-frequency character with excellent power handling and long-term durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4.5\" ABS Horn with 35° Rounded Coverage\u003c\/strong\u003e — Focused sound pattern for maximum SPL and controlled dispersion — ideal for competition and demo build applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeodymium Magnet\u003c\/strong\u003e — High-flux, compact neodymium motor for maximum sensitivity and output in a compact driver package.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCCAW Voice Coil on Kapton Former\u003c\/strong\u003e — Lightweight, thermally efficient winding on a rigid former — handles sustained high-power use without thermal compression.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAluminum Driver Body\u003c\/strong\u003e — Rigid, thermally efficient housing for long-term high-power performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8Ω Impedance\u003c\/strong\u003e — Wire two in parallel for a 4Ω load, or use individually with a pro audio amplifier rated at 8Ω.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eInstallation \u0026amp; Pairing Recommendations\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCrossover Configuration:\u003c\/strong\u003e The SQ-HDC-1HDP-8 is a dedicated high-frequency driver — always use a high-pass crossover set at \u003cstrong\u003e2 kHz minimum\u003c\/strong\u003e to protect the driver and keep it operating in its optimal range. For competition and high-output builds, use an active crossover or DSP to set a precise HPF at 2 kHz. Never run the SQ-HDC-1HDP-8 full-range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAmplifier Pairing:\u003c\/strong\u003e The SQ-HDC-1HDP-8 handles \u003cstrong\u003e120W RMS at 8Ω\u003c\/strong\u003e and is rated at \u003cstrong\u003e108 dB sensitivity\u003c\/strong\u003e — it will be dramatically louder than most woofers and midranges at the same power level. Use a DSP or active crossover with per-channel level control to balance system output. Verify your amplifier’s 8Ω power rating before purchasing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImpedance \u0026amp; Wiring:\u003c\/strong\u003e The SQ-HDC-1HDP-8 is an \u003cstrong\u003e8Ω driver\u003c\/strong\u003e. Two units wired in parallel present a \u003cstrong\u003e4Ω load\u003c\/strong\u003e to your amplifier — ideal for high-output stereo builds using a single amplifier channel per side. Verify your amplifier’s minimum impedance rating before wiring multiple drivers in parallel.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMounting:\u003c\/strong\u003e The SQ-HDC-1HDP-8 requires a \u003cstrong\u003e3.7\" \/ 94mm mounting hole diameter\u003c\/strong\u003e with a \u003cstrong\u003e4 x 3.4\" \/ 4 x 86.5mm bolt pattern\u003c\/strong\u003e and \u003cstrong\u003e3\" \/ 78mm mounting depth\u003c\/strong\u003e. Overall dimensions are 4.5\" x 4.5\" \/ 114.7 x 114.7mm, overall depth is 3.65\" \/ 92.8mm. Verify your mounting location provides adequate depth and bolt pattern clearance before purchasing.\u003c\/p\u003e\n\u003ch2\u003eFull Specifications\u003c\/h2\u003e\n\u003ch3\u003eGeneral\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 14px;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"background-color: #222; color: #fff; padding: 8px; text-align: left;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"background-color: #222; color: #fff; padding: 8px; text-align: left;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eNominal Impedance\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e8 Ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003eContinuous Power Handling\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e60W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eRMS Power Handling\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e120W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003eMaximum Power Handling\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e240W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSensitivity (1W\/1m) With Horn\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e108 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003eFrequency Response\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e1.5 kHz – 18 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eRecommended Hi-Pass Crossover\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e2 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSold In\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSingle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3\u003eDriver (Motor) Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 14px;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"background-color: #222; color: #fff; padding: 8px; text-align: left;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"background-color: #222; color: #fff; padding: 8px; text-align: left;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eVoice Coil Diameter\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e1\" \/ 25.4mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003eVC Former Material\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eKapton\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eWinding Material\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eCCAW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003eDiaphragm Material\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003ePhenolic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eMagnet Material\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eNeodymium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003eMagnet Size\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e0.96\" x 0.19\" \/ 24.5x5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eBody Material\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3\u003eHorn Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 14px;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"background-color: #222; color: #fff; padding: 8px; text-align: left;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"background-color: #222; color: #fff; padding: 8px; text-align: left;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eNominal Diameter\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e4.5\" \/ 114.7mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003eThroat Diameter\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e1\" \/ 25.4mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSound Coverage\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e35° Rounded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003eBody Material\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eABS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eColor\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3\u003eMeasurements\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 14px;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"background-color: #222; color: #fff; padding: 8px; text-align: left;\"\u003eDimension\u003c\/th\u003e\n\u003cth style=\"background-color: #222; color: #fff; padding: 8px; text-align: left;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eOverall Diameter\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e4.5\" x 4.5\" \/ 114.7 x 114.7mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003eOverall Depth\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e3.65\" \/ 92.8mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eMounting Depth\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e3\" \/ 78mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003eMounting Hole Diameter\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e3.7\" \/ 94mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003ctd style=\"padding: 8px;\"\u003eBolt Pattern (Horn)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e4 x 3.4\" \/ 4 x 86.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is the SQ-HDC-1HDP-8 a complete system or do I need to buy the horn and driver separately?\u003c\/strong\u003e\u003cbr\u003eA: The SQ-HDC-1HDP-8 is a \u003cstrong\u003ecomplete system\u003c\/strong\u003e — the 4.5\" ABS horn diffuser and 1\" phenolic compression driver are included together as a single unit. No additional horn or driver purchase required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is the sensitivity rated “with horn”?\u003c\/strong\u003e\u003cbr\u003eA: The \u003cstrong\u003e108 dB sensitivity\u003c\/strong\u003e is measured with the horn attached — the horn focuses and amplifies the driver’s output, significantly increasing sensitivity compared to the driver alone. This is standard practice for horn driver systems and reflects real-world installed performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is the SQ-HDC-1HDP-8 rated at 8Ω instead of 4Ω?\u003c\/strong\u003e\u003cbr\u003eA: The SQ-HDC-1HDP-8 uses an 8Ω voice coil — standard for pro audio compression drivers. Two units wired in parallel present a 4Ω load to your amplifier. Verify your amplifier’s minimum impedance rating before wiring multiple drivers in parallel.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this sold as a pair or single?\u003c\/strong\u003e\u003cbr\u003eA: The SQ-HDC-1HDP-8 is sold as a \u003cstrong\u003esingle unit\u003c\/strong\u003e. Order quantity two for a stereo pair.\u003c\/p\u003e","brand":"SoundQubed","offers":[{"title":"Default Title","offer_id":43673240109123,"sku":null,"price":49.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0637\/9575\/7123\/files\/Untitled_-_2025-01-13T151355.31568__44176.webp?v=1786741080","url":"https:\/\/www.trinitycaraudio.com\/products\/soundqubed-sq-hdc-1hdp-8-4-5-horn-diffuser-1-phenolic-driver-each","provider":"Trinity Car Audio","version":"1.0","type":"link"}