{"product_id":"ch-precision-l1-5-line-stage-preamplifier","title":"CH Precision L1.5 Line Stage Preamplifier","description":"\u003cp\u003eThe \u003cstrong\u003eCH Precision\u003c\/strong\u003e L1.5 is a fully balanced, discrete Class-A \u003cstrong\u003eline stage preamplifier\u003c\/strong\u003e engineered in Switzerland to sit at the centre of a reference two-channel system without leaving a signature of its own. It advances the original L1 with technology drawn directly from the flagship L10, including discrete diamond input buffers, local-feedback amplification stages, wider DC compensation and shunt regulation throughout its critical analogue circuitry. A fully differential 20-bit R-2R volume control, a completely capacitor-free DC-coupled signal path and galvanically isolated digital control combine modern convenience with a signal path that remains entirely analogue.\u003c\/p\u003e\u003ch3\u003eThe Hi-Fi Centre Team Take\u003c\/h3\u003e\u003cp\u003eThe L1.5 is a preamplifier you notice most by what it leaves untouched. Each source keeps its own character, and the music arrives with a sense of scale, timing and calm that is easy to take for granted until you hear a lesser line stage in its place. The R-2R volume control works in precise 0.5 dB steps with gain applied only when needed, so it stays quiet and composed at low late-evening levels and has ample headroom when the music builds. Six inputs, adjustable input impedance, an AMOLED display and app control make it remarkably easy to live with, and the X1 External Power Supply offers a clear path to an even quieter background as your system develops.\u003c\/p\u003e\u003ch3\u003eKey Acoustic \u0026amp; Design Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eL10-Derived Diamond Input Buffers:\u003c\/strong\u003e Discrete buffers with separate hot and cold stages use paired transistors formed on the same die for close matching and thermal tracking, with RCA connectors mounted directly to the circuit board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalogue R-2R Volume with Selectable Gain:\u003c\/strong\u003e A fully differential 20-bit R-2R network attenuates in exact 0.5 dB steps, while a discrete Class-A stage adds 0, +6, +12 or +18 dB only when required, preserving dynamic range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDC-Coupled, Shunt-Regulated Design:\u003c\/strong\u003e Local-feedback Class-A stages, no coupling capacitors in the signal path, active DC compensation and shunt regulation at every critical stage protect timing, phase integrity and stability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuthorized Dealer Support:\u003c\/strong\u003e Hi-Fi Centre is an Authorized Dealer for CH Precision, ensuring authentic products backed by full manufacturer warranty coverage, in-store demonstration and expert setup support.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand \u0026amp; Model:\u003c\/strong\u003e CH Precision L1.5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComponent Type:\u003c\/strong\u003e Line Stage Preamplifier\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCircuit Topology:\u003c\/strong\u003e Fully discrete, Class A, local feedback, fully DC-coupled\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalogue Inputs (per channel):\u003c\/strong\u003e 4x balanced XLR, 2x single-ended RCA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Impedance:\u003c\/strong\u003e Balanced 94 kΩ or 600 Ω; single-ended 47 kΩ or 300 Ω\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Input Level:\u003c\/strong\u003e Balanced 16 VRMS; single-ended 8 VRMS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalogue Outputs (per channel):\u003c\/strong\u003e 2x balanced XLR, 1x single-ended RCA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Impedance:\u003c\/strong\u003e Balanced 2x 30 Ω; single-ended 50 Ω\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Output Level:\u003c\/strong\u003e Balanced 12 VRMS; single-ended 6 VRMS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVolume Control:\u003c\/strong\u003e Fully differential 20-bit R-2R, -99.5 dB to 0 dB in 0.5 dB steps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActive Gain Settings:\u003c\/strong\u003e 0 dB, +6 dB, +12 dB or +18 dB (total range -99.5 dB to +18 dB)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBandwidth:\u003c\/strong\u003e DC to \u0026gt;700 kHz (-3 dB)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTHD+N:\u003c\/strong\u003e \u0026lt;0.0008% (22 Hz-22 kHz, A-weighted)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal-to-Noise Ratio:\u003c\/strong\u003e \u0026gt;137 dB (20 Hz-20 kHz, A-weighted)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Noise:\u003c\/strong\u003e Balanced \u0026lt;2.0 μVRMS; single-ended \u0026lt;1.5 μVRMS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e 800 x 480 pixel, 24-bit RGB AMOLED\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl:\u003c\/strong\u003e Dual-concentric encoder with push function, infrared remote, CH Control app for iOS and Android\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFirmware Update:\u003c\/strong\u003e USB flash drive or Internet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgrade Path:\u003c\/strong\u003e X1 External Power Supply\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e Selectable 100V, 115V or 230V AC, 47-63 Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Consumption:\u003c\/strong\u003e 55W nominal; \u0026lt;0.5W standby\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (W x D x H):\u003c\/strong\u003e 440 mm x 440 mm x 133 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 20 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinishes:\u003c\/strong\u003e Silver (standard); Anthracite or Champagne (optional)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between the CH Precision L1 and the L1.5?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe L1.5 substantially revises the L1's signal path with technology from the flagship L10, including discrete diamond input buffers, local feedback in place of the L1's global feedback, wider DC compensation and more advanced shunt-regulated power supplies. The rear panel has also been redesigned, removing the former BNC inputs so the RCA connectors can be mounted directly to the circuit board.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the CH Precision L1.5 be upgraded with an external power supply?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eYes. The L1.5 can be paired with the CH Precision X1 External Power Supply, which moves the transformer and primary regulation into a separate chassis. This removes mains-related noise, vibration and heat from the L1.5 enclosure, lowering the noise floor and improving voltage stability.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the L1.5 use digital processing for its volume control?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eNo. Volume is controlled by a fully differential R-2R resistor network operating entirely in the analogue domain. Input selection, volume, balance and app control are managed digitally, but the control circuitry is galvanically isolated from the analogue signal path, so the music is never digitally processed.\u003c\/p\u003e","brand":"CH Precision","offers":[{"title":"Default Title","offer_id":67779667492917,"sku":"L1.5","price":55300.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2246\/9355\/files\/L1.5.jpg?v=1792778741","url":"https:\/\/hificentre.com\/products\/ch-precision-l1-5-line-stage-preamplifier","provider":"Hi-Fi Centre","version":"1.0","type":"link"}