{"product_id":"gryphon-helios-preamplifier","title":"Gryphon Helios Preamplifier","description":"\u003ch3 class=\"PDq2pG_selectionAnchorContainer\"\u003e\n\u003cstrong\u003eThe Evolution of Pure Class A Control | Available at Trimira Audio\u003c\/strong\u003e\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eGryphon Helios Preamplifier\u003c\/strong\u003e is a high-end two-chassis line stage developed as the successor to the Gryphon Pandora, incorporating technologies derived from the company's flagship Commander platform.\u003c\/p\u003e\n\u003cp\u003eThe Helios separates its sensitive analogue circuitry from the dedicated \u003cstrong\u003ePSU 5 Dual Mono Power Supply\u003c\/strong\u003e, while employing a fully discrete \u003cstrong\u003ePure Class A dual-mono topology\u003c\/strong\u003e, zero global negative feedback, ultra-low-noise JFET input circuitry, and an 85-step relay-controlled volume attenuator.\u003c\/p\u003e\n\u003cp\u003eWith optional \u003cstrong\u003eDAC3\u003c\/strong\u003e and \u003cstrong\u003ePS3\u003c\/strong\u003e expansion modules, the Helios can also form the central control component of a highly configurable reference two-channel system.\u003c\/p\u003e\n\u003cp\u003eAt \u003cstrong\u003eTrimira Audio\u003c\/strong\u003e, we recommend the Helios for listeners seeking an exceptionally transparent, flexible preamplifier capable of partnering with high-current Gryphon power amplifiers and other reference amplification.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Technological Innovations\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eTwo-Chassis Architecture with PSU 5\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Helios separates the analogue preamplifier from its dedicated \u003cstrong\u003ePSU 5 power supply\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThis physical separation is designed to reduce the influence of power-supply circuitry and transformer fields on the sensitive line-stage electronics.\u003c\/p\u003e\n\u003cp\u003eThe PSU 5 incorporates a dual-mono power architecture with substantial energy storage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUltra-Low-Noise JFET Class A Input Stage\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Helios employs discrete \u003cstrong\u003eClass A JFET input circuitry\u003c\/strong\u003e designed to provide low noise and linear signal handling.\u003c\/p\u003e\n\u003cp\u003ePCB-mounted input sockets are used to keep signal paths short and minimise unnecessary internal wiring.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e85-Step Relay Volume Attenuator\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eVolume control is provided through an \u003cstrong\u003e85-step microprocessor-controlled relay attenuator\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003ePrecision resistors and low-capacitance switching components provide accurate channel tracking across the available volume range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eZero Global Negative Feedback\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Helios operates without global negative feedback and provides an exceptionally wide specified bandwidth of:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e0.1 Hz–1.5 MHz (-3 dB)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe architecture is designed to preserve transient response and phase behaviour across the audio band.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eModular DAC3 \u0026amp; PS3 Expansion\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe rear panel provides expansion capability for Gryphon's optional digital and phono modules.\u003c\/p\u003e\n\u003cp\u003eCompatible options include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eDAC3 Digital Module\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003ePS3 Phono Module\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis allows the Helios to evolve alongside the rest of the system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4.3-Inch TFT Touchscreen\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA \u003cstrong\u003e4.3-inch capacitive TFT touchscreen\u003c\/strong\u003e is integrated into a 4 mm-thick glass interface.\u003c\/p\u003e\n\u003cp\u003eThe display provides access to functions including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVolume\u003c\/li\u003e\n\u003cli\u003eBalance\u003c\/li\u003e\n\u003cli\u003eLevel matching\u003c\/li\u003e\n\u003cli\u003eSystem settings\u003c\/li\u003e\n\u003cli\u003eGreen Bias control\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGreen Bias Control\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Helios can communicate with compatible Gryphon power amplifiers through the \u003cstrong\u003eGreen Bias\u003c\/strong\u003e system.\u003c\/p\u003e\n\u003cp\u003eThis allows Class A amplifier bias settings to be managed from the preamplifier, helping coordinate operating conditions across the system.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cdiv class=\"group TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eGryphon Helios Preamplifier + PSU 5\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTopology\u003c\/td\u003e\n\u003ctd\u003ePure Class A Dual-Mono Line Stage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInputs\u003c\/td\u003e\n\u003ctd\u003e3 × Balanced XLR \/ 2 × Single-Ended RCA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutputs\u003c\/td\u003e\n\u003ctd\u003e2 × Balanced XLR Main Out \/ 1 × RCA Main Out\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Response (-3 dB)\u003c\/td\u003e\n\u003ctd\u003e0.1 Hz–1.5 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGain\u003c\/td\u003e\n\u003ctd\u003e+18.0 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTHD + N\u003c\/td\u003e\n\u003ctd\u003e0.003% @ 1 kHz, Balanced Output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Impedance\u003c\/td\u003e\n\u003ctd\u003e25 kΩ Balanced \/ 12.5 kΩ Single-Ended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Impedance\u003c\/td\u003e\n\u003ctd\u003e8 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Output Level\u003c\/td\u003e\n\u003ctd\u003e20.0 Vrms Balanced \/ 9.5 Vrms Single-Ended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePSU 5 Reservoir\u003c\/td\u003e\n\u003ctd\u003e2 × 83,000 µF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003e4.3-inch TFT Capacitive Glass Touchscreen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePreamp Dimensions (W × D × H)\u003c\/td\u003e\n\u003ctd\u003e475 × 387 × 173 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePreamp Weight\u003c\/td\u003e\n\u003ctd\u003e13.9 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePSU 5 Dimensions (W × D × H)\u003c\/td\u003e\n\u003ctd\u003e475 × 387 × 173 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePSU 5 Weight\u003c\/td\u003e\n\u003ctd\u003e18.2 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCombined Weight\u003c\/td\u003e\n\u003ctd\u003e32.1 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cbr\u003eReference System Architecture\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Helios is designed to sit at the centre of a sophisticated analogue and digital two-channel system:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDigital \/ Analogue Sources → Gryphon Helios → Gryphon Power Amplifier → Reference Loudspeakers\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWith its balanced XLR outputs and high maximum output level, the Helios is particularly well suited to high-end balanced amplification.\u003c\/p\u003e\n\u003cp\u003eThe optional DAC3 and PS3 modules can further consolidate digital and vinyl sources within the preamplifier platform.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSource \u0026amp; Amplifier Matching\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Helios provides both balanced and single-ended connectivity, allowing integration with a broad range of source components and power amplifiers.\u003c\/p\u003e\n\u003cp\u003eTrimira Audio can assist with:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGryphon power-amplifier matching\u003c\/li\u003e\n\u003cli\u003eDAC3 configuration\u003c\/li\u003e\n\u003cli\u003ePS3 phono-module selection\u003c\/li\u003e\n\u003cli\u003eBalanced XLR system design\u003c\/li\u003e\n\u003cli\u003eGain-structure optimisation\u003c\/li\u003e\n\u003cli\u003eInterconnect selection\u003c\/li\u003e\n\u003cli\u003eGreen Bias integration\u003c\/li\u003e\n\u003cli\u003eComplete reference system configuration\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTwo-Chassis Installation\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe combined system weighs approximately \u003cstrong\u003e32.1 kg\u003c\/strong\u003e, with the audio chassis and PSU 5 housed separately.\u003c\/p\u003e\n\u003cp\u003eThe external power supply provides additional placement flexibility and can be positioned away from the sensitive analogue preamplifier circuitry.\u003c\/p\u003e\n\u003cp\u003eTrimira Audio can advise on:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eChassis positioning\u003c\/li\u003e\n\u003cli\u003eCable routing\u003c\/li\u003e\n\u003cli\u003eMains-power requirements\u003c\/li\u003e\n\u003cli\u003eEquipment-rack placement\u003c\/li\u003e\n\u003cli\u003eSystem grounding\u003c\/li\u003e\n\u003cli\u003eThermal considerations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eConsult with the High-End Audio Specialists at Trimira Audio\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eGryphon Helios\u003c\/strong\u003e combines \u003cstrong\u003ePure Class A dual-mono circuitry, zero global negative feedback, ultra-low-noise JFET input stages, an 85-step relay attenuator, two-chassis PSU 5 architecture, optional DAC3\/PS3 expansion, and Green Bias control\u003c\/strong\u003e in a sophisticated reference line stage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTrimira Audio\u003c\/strong\u003e can assist with complete Helios system integration, including source configuration, Gryphon amplifier matching, modular upgrades, balanced cabling, and final system optimisation.\u003c\/p\u003e\n\u003cp\u003eContact the \u003cstrong\u003eTrimira Audio\u003c\/strong\u003e two-channel specialists in Brisbane to arrange a private Helios listening session or discuss a complete Gryphon reference system.\u003c\/p\u003e","brand":"Gryphon","offers":[{"title":"Default Title","offer_id":45135315238978,"sku":null,"price":37995.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0029\/9686\/3046\/files\/aedrFZFGTXBHNfedstaxczASZXXXdxcszDCACDDSDXdxCcSSCSCSZxDSXZACdxCScdxCSdxxddddcxsZF.png?v=1788406147","url":"https:\/\/trimira.com.au\/products\/gryphon-helios-preamplifier","provider":"Trimira","version":"1.0","type":"link"}