{"product_id":"antelope-audio-a4-1b-opto-valve-compressor","title":"Antelope Audio A4-1B Opto-Valve Compressor","description":"\u003ch2\u003eAntelope Audio A4-1B Opto-Valve Compressor\u003c\/h2\u003e\n\n\u003cp\u003eThe Antelope Audio A4-1B combines classic opto-tube compression with modern workflow enhancements. Designed around an all-analog signal path with premium tubes and custom transformers, the A4-1B delivers smooth, musical compression while introducing modern capabilities like plugin control, automation, and instant preset recall.\u003c\/p\u003e\n\n\u003c!-- PAR SECTION 1 --\u003e\n\u003cdiv class=\"par-section\"\u003e\n\u003cdiv class=\"par-image\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/files\/Antelope_Audio_A4-1B_Analog_Automated_Opto_Valve_Compressor_front_side.png?v=1773255447\" alt=\"Antelope Audio A4-1B Opto Valve Compressor front panel\"\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"par-text\"\u003e\n\u003ch2\u003eClassic Opto-Tube Compression\u003c\/h2\u003e\n\u003cp\u003eThe A4-1B captures the smooth and musical response that made vintage opto-tube compressors legendary in professional studios. Its analog optical circuit reacts naturally to incoming signals, delivering controlled dynamics while maintaining transparency and musicality.\u003c\/p\u003e\n\n\u003cp\u003eEven when driven harder, the compressor retains clarity and depth, making it ideal for vocals, bass, keyboards, and percussion. The circuit recreates the feel and behavior of classic Danish opto-tube compression while maintaining modern reliability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c!-- PAR SECTION 2 --\u003e\n\u003cdiv class=\"par-section reverse\"\u003e\n\u003cdiv class=\"par-image\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/files\/Antelope_Audio_A4-1B_Analog_Automated_Opto_Valve_Compressor_rear_view_1.png?v=1773255447\" alt=\"Antelope Audio A4-1B transformers and tube circuit\"\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"par-text\"\u003e\n\u003ch2\u003ePremium Analog Signal Path\u003c\/h2\u003e\n\u003cp\u003eThe A4-1B is built with carefully selected high-grade components to maintain exceptional sonic performance across the full frequency spectrum. Custom UK-made input and output transformers deliver tight low-end response, detailed highs, and rich harmonic character.\u003c\/p\u003e\n\n\u003cp\u003eHand-selected premium vacuum tubes shape the compressor’s tone, adding warmth and musical saturation while preserving clarity. A modern power supply design with DC tube heating ensures low noise and stable operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c!-- PAR SECTION 3 --\u003e\n\u003cdiv class=\"par-section\"\u003e\n\u003cdiv class=\"par-image\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/files\/Antelope_Audio_A4-1B_Analog_Automated_Opto_Valve_Compressor_compessor_view_1.png?v=1773255411\" alt=\"Antelope Audio A4-1B plugin control interface\"\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"par-text\"\u003e\n\u003ch2\u003eAnalog Compression with Digital Control\u003c\/h2\u003e\n\u003cp\u003eThe A4-1B introduces Antelope Audio’s analog automation system, allowing full plugin control of the hardware from your DAW. Motorized potentiometers automatically move to match software adjustments, providing instant recall and precise automation.\u003c\/p\u003e\n\n\u003cp\u003eThe included plugin supports VST3, AU, and AAX formats, enabling preset management, A\/B comparisons, automation, and advanced sidechain filtering directly from your DAW. This hybrid approach allows the A4-1B to integrate seamlessly into modern analog, digital, or hybrid studio setups.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eOpto-tube compression circuit\u003c\/li\u003e\n\u003cli\u003eAll-analog signal path\u003c\/li\u003e\n\u003cli\u003eCustom UK-made input and output transformers\u003c\/li\u003e\n\u003cli\u003ePremium vacuum tube amplification\u003c\/li\u003e\n\u003cli\u003eMotorized potentiometers for instant recall\u003c\/li\u003e\n\u003cli\u003eFull DAW automation and plugin control\u003c\/li\u003e\n\u003cli\u003eIntegrated calibration system\u003c\/li\u003e\n\u003cli\u003eSidechain filtering and de-essing via plugin\u003c\/li\u003e\n\u003cli\u003eVST3 \/ AU \/ AAX plugin compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eAntelope Audio A4-1B Opto-Valve Compressor\u003c\/li\u003e\n\u003cli\u003eA4-1B Plugin for automation and preset recall\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Antelope Audio","offers":[{"title":"Default Title","offer_id":48120786321563,"sku":"A4-1B","price":1995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/files\/Antelope_Audio_A4-1B_Analog_Automated_Opto_Valve_Compressor_front_side.png?v=1773255447","url":"https:\/\/proaudioreserve.com\/products\/antelope-audio-a4-1b-opto-valve-compressor","provider":"Pro Audio Reserve","version":"1.0","type":"link"}