{"title":"Vacuvox","description":null,"products":[{"product_id":"vacuvox-u23m-mastering-compressor-limiter","title":"Vacuvox U23m Mastering Vari-Mu Compressor\/Limiter","description":"\u003cp\u003eThe \u003cstrong\u003eVacuvox U23m\u003c\/strong\u003e is a mastering version of the U23 vari-mu compressor\/limiter building upon the legacy of the Vacuvox CL-2 for which the Rohde \u0026amp; Schwarz U-23 broadcast limiter served as a basis. Several improvements have taken the design and functionality of the CL-2 a step further while preserving the euphonic sound of the original. The Vacuvox U23 has an all Class A vacuum tube audio path, and side-chain path based upon the original circuit of the Rohde \u0026amp; Schwarz U23. These ensure unparalleled performance and provide unrivaled headroom and transparency.\u003c\/p\u003e\r\n\r\n\u003ch3 id=\"toc_0\"\u003eDESIGN AND FUNCTIONALITY\u003c\/h3\u003e\r\n\r\n\u003cp\u003eThe Vacuvox U23m mastering compressor\/limiter is assembled entirely by hand and uses high-quality modern components. The custom-made transformers are faithful recreations of the original, sonically excellent, Rohde \u0026amp; Schwarz transformers. The four audio transformers are made of permalloy with 80% nickel and 20% iron content. The chokes and power supply are made of SiFi. The power transformer is upgraded for better noise performance and stability. A front panel layout, a modification of the output gain and the thresholds and two extra gain stages are the most significant improvements that have been incorporated in the Vacuvox U23m.\u003c\/p\u003e\r\n\r\n\u003cp\u003e21-stepped switches for input, output, attack, release, and threshold are used for the U23m mastering version. These extend the use of a pair of U23m compressor limiters to critical stereo applications for many different genres of music. Even jazz and classical material can be mildly compressed with a perfect stereo balance and without sacrificing the sense of dynamics and producing unwanted artifacts.\u003c\/p\u003e\r\n\r\n\u003cp\u003eThe various gain structure options from the Pad, Input, Gain and Threshold offer the possibility to create different kind and levels of saturation subtly. Therefore the sound can be varied between transparent, dense and fluid by lowering the threshold, driving the input transformer or driving the tubes.\u003c\/p\u003e\r\n\r\n\r\n\r\n\u003cp\u003e\u003cem\u003eThe above features are included with both the U23 and U23m, the following are specific to the U23m:\u003c\/em\u003e\u003c\/p\u003e\r\n\r\n\u003cul\u003e\r\n\u003cli\u003eRatio: 7-step rotary switch with ratios 2:1, 3:1, 4:1, 5:1, 7:1, 9:1, 12:1\u003c\/li\u003e\r\n\u003cli\u003eInput: 21-step attenuator switch with 1 dB per step\u003c\/li\u003e\r\n\u003cli\u003eAttack: 21-step rotary switch with time settings between 1 mS and 50 mS\u003c\/li\u003e\r\n\u003cli\u003eRelease: 21-step rotary switch with time settings between 0.2 S and 1.2 S\u003c\/li\u003e\r\n\u003cli\u003eOutput: 21-step attenuator switch with 2 dB per step for the first 5 steps and 1 dB per step for the last 15 steps\u003c\/li\u003e\r\n\u003cli\u003eSelectable output level (normal or +6 dB) of the output transformer\u003c\/li\u003e\r\n\u003c\/ul\u003e","brand":"Vacuvox","offers":[{"title":"Default Title","offer_id":44451039248487,"sku":"212064","price":12295.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8848\/5479\/files\/vacuvox-u23m_212064_1_50c3e780-6509-4dd4-b207-cf06a40a980f.jpg?v=1787095587"},{"product_id":"vacuvox-v41-stereo-dual-mono-tube-microphone-preamp-steel-tubes","title":"Vacuvox V41 Stereo\/Dual-Mono Tube Microphone Preamp - Steel Tubes","description":"\u003cp\u003eThe \u003cstrong\u003eVacuvox V41\u003c\/strong\u003e stereo\/dual-mono microphone preamp is a recreation of the ultra-rare Maihak (Telefunken) V41, widely considered to be the Holy Grail of preamps! The steel tube option available here uses NOS Telefunken EF12 steel tubes like the original.\u003c\/p\u003e\r\n\u003cp\u003eThe Vacuvox V41 preamp performs exactly like the original in sound, frequency and phase behavior. It features an upgraded regulated power supply with a much lower noise floor than the original (\u0026lt;-90 dB). It is also more stable which results in a tighter bass end.\u003c\/p\u003e\r\n\u003cp\u003eThe Vacucox V41 has 5 dB more gain than the original by using the output transformer in a different way. This recreation also features a -20 dB pad, phase reverse, +48V phantom power, high-pass filter above 60 Hz, and an extra linear potentiometer to adjust the gain in between the 5 dB steps. Channels can be matched by an internal trimmer.\u003c\/p\u003e\r\n\u003cp\u003eThe V41 has two channels each with separate power supplies. Each channel has 6 transformers and 4 tubes. This version uses 1x EF12K, 2x EF12, and 1x EZ11 NOS tubes like the original Maihak V41. The transformers are custom-wound at the same factory used for the U23. Audio transformers are perfect replicas from the original Malotki made from the purest permalloy (80% nickel). Input and output transformers are shielded through numeral cans and the power transformer has a static shield to prevent noise and clicks coming in from the outside.\u003c\/p\u003e","brand":"Vacuvox","offers":[{"title":"Default Title","offer_id":44451117793383,"sku":"212067","price":13995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8848\/5479\/files\/vacuvox-v41_212067_1.jpg?v=1787095906"},{"product_id":"vacuvox-v41-stereo-dual-mono-tube-microphone-preamp-glass-tubes","title":"Vacuvox V41 Stereo\/Dual-Mono Tube Microphone Preamp - Glass Tubes","description":"\u003cp\u003eThe \u003cstrong\u003eVacuvox V41\u003c\/strong\u003e stereo\/dual-mono microphone preamp is a recreation of the ultra-rare Maihak (Telefunken) V41, widely considered to be the Holy Grail of preamps! This version uses EF804S, EF804, and EZ80 NOS tubes glass tubes for a sound extremely close to the original.\u003c\/p\u003e\r\n\r\n\u003cp\u003eThe Vacuvox V41 preamp performs exactly like the original in sound, frequency and phase behavior. It features an upgraded regulated power supply with a much lower noise floor than the original (\u0026lt;-90 dB). It is also more stable which results in a tighter bass end.\u003c\/p\u003e\r\n\r\n\u003cp\u003eThe Vacucox V41 has 5 dB more gain than the original by using the output transformer in a different way. This recreation also features a -20 dB pad, phase reverse, +48V phantom power, high-pass filter above 60 Hz and an extra linear potentiometer to adjust the gain in between the 5 dB steps. Channels can be matched by an internal trimmer.\u003c\/p\u003e\r\n\r\n\u003cp\u003eThe V41 has two channels each with separate power supplies. Each channel has 6 transformers and 4 tubes. This version 1x EF804S, 2x EF804, and 1x EZ80 NOS tubes for a sound very close to the original. The transformers are custom-wound at the same factory used for the U23. Audio transformers are perfect replicas from the original Malotki made from the purest permalloy (80% nickel). Input and output transformers are shielded through numeral cans and the power transformer has a static shield to prevent noise and clicks coming in from the outside.\u003c\/p\u003e","brand":"Vacuvox","offers":[{"title":"Default Title","offer_id":44451117826151,"sku":"212071","price":12595.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8848\/5479\/files\/vacuvox-v41_212071_1.jpg?v=1787095906"},{"product_id":"vacuvox-u23m-mastering-vari-mu-compressor-limiter-demo-deal","title":"Vacuvox U23m Mastering Vari-Mu Compressor\/Limiter (Demo Deal)","description":"\u003cp\u003eThe \u003cstrong\u003eVacuvox U23m\u003c\/strong\u003e is a mastering version of the U23 vari-mu compressor\/limiter building upon the legacy of the Vacuvox CL-2 for which the Rohde \u0026amp; Schwarz U-23 broadcast limiter served as a basis. Several improvements have taken the design and functionality of the CL-2 a step further while preserving the euphonic sound of the original. The Vacuvox U23 has an all Class A vacuum tube audio path, and side-chain path based upon the original circuit of the Rohde \u0026amp; Schwarz U23. These ensure unparalleled performance and provide unrivaled headroom and transparency.\u003c\/p\u003e\n\n\u003ch3 id=\"toc_0\"\u003eDESIGN AND FUNCTIONALITY\u003c\/h3\u003e\n\n\u003cp\u003eThe Vacuvox U23m mastering compressor\/limiter is assembled entirely by hand and uses high-quality modern components. The custom-made transformers are faithful recreations of the original, sonically excellent, Rohde \u0026amp; Schwarz transformers. The four audio transformers are made of permalloy with 80% nickel and 20% iron content. The chokes and power supply are made of SiFi. The power transformer is upgraded for better noise performance and stability. A front panel layout, a modification of the output gain and the thresholds and two extra gain stages are the most significant improvements that have been incorporated in the Vacuvox U23m.\u003c\/p\u003e\n\n\u003cp\u003e21-stepped switches for input, output, attack, release, and threshold are used for the U23m mastering version. These extend the use of a pair of U23m compressor limiters to critical stereo applications for many different genres of music. Even jazz and classical material can be mildly compressed with a perfect stereo balance and without sacrificing the sense of dynamics and producing unwanted artifacts.\u003c\/p\u003e\n\n\u003cp\u003eThe various gain structure options from the Pad, Input, Gain and Threshold offer the possibility to create different kind and levels of saturation subtly. Therefore the sound can be varied between transparent, dense and fluid by lowering the threshold, driving the input transformer or driving the tubes.\u003c\/p\u003e\n\n\n\n\u003cp\u003e\u003cem\u003eThe above features are included with both the U23 and U23m, the following are specific to the U23m:\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eRatio: 7-step rotary switch with ratios 2:1, 3:1, 4:1, 5:1, 7:1, 9:1, 12:1\u003c\/li\u003e\n\u003cli\u003eInput: 21-step attenuator switch with 1 dB per step\u003c\/li\u003e\n\u003cli\u003eAttack: 21-step rotary switch with time settings between 1 mS and 50 mS\u003c\/li\u003e\n\u003cli\u003eRelease: 21-step rotary switch with time settings between 0.2 S and 1.2 S\u003c\/li\u003e\n\u003cli\u003eOutput: 21-step attenuator switch with 2 dB per step for the first 5 steps and 1 dB per step for the last 15 steps\u003c\/li\u003e\n\u003cli\u003eSelectable output level (normal or +6 dB) of the output transformer\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Vacuvox","offers":[{"title":"Default Title","offer_id":44451178774631,"sku":"466804","price":10995.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8848\/5479\/files\/vacuvox-u23m_212064_1.jpg?v=1787096156"},{"product_id":"vacuvox-u23m-mastering-vari-mu-compressor-limiter-079-used","title":"Vacuvox U23m Mastering Vari-Mu Compressor\/Limiter #079 (Used)","description":"\u003cp\u003eThe \u003cstrong\u003eVacuvox U23m\u003c\/strong\u003e is a mastering version of the U23 vari-mu compressor\/limiter building upon the legacy of the Vacuvox CL-2 for which the Rohde \u0026amp; Schwarz U-23 broadcast limiter served as a basis. Several improvements have taken the design and functionality of the CL-2 a step further while preserving the euphonic sound of the original. The Vacuvox U23 has an all Class A vacuum tube audio path, and side-chain path based upon the original circuit of the Rohde \u0026amp; Schwarz U23. These ensure unparalleled performance and provide unrivaled headroom and transparency.\u003c\/p\u003e  \u003ch3 id=\"toc_0\"\u003eDESIGN AND FUNCTIONALITY\u003c\/h3\u003e  \u003cp\u003eThe Vacuvox U23m mastering compressor\/limiter is assembled entirely by hand and uses high-quality modern components. The custom-made transformers are faithful recreations of the original, sonically excellent, Rohde \u0026amp; Schwarz transformers. The four audio transformers are made of permalloy with 80% nickel and 20% iron content. The chokes and power supply are made of SiFi. The power transformer is upgraded for better noise performance and stability. A front panel layout, a modification of the output gain and the thresholds and two extra gain stages are the most significant improvements that have been incorporated in the Vacuvox U23m.\u003c\/p\u003e  \u003cp\u003e21-stepped switches for input, output, attack, release, and threshold are used for the U23m mastering version. These extend the use of a pair of U23m compressor limiters to critical stereo applications for many different genres of music. Even jazz and classical material can be mildly compressed with a perfect stereo balance and without sacrificing the sense of dynamics and producing unwanted artifacts.\u003c\/p\u003e  \u003cp\u003eThe various gain structure options from the Pad, Input, Gain and Threshold offer the possibility to create different kind and levels of saturation subtly. Therefore the sound can be varied between transparent, dense and fluid by lowering the threshold, driving the input transformer or driving the tubes.\u003c\/p\u003e   \u003cp\u003e\u003cem\u003eThe above features are included with both the U23 and U23m, the following are specific to the U23m:\u003c\/em\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eRatio: 7-step rotary switch with ratios 2:1, 3:1, 4:1, 5:1, 7:1, 9:1, 12:1\u003c\/li\u003e \u003cli\u003eInput: 21-step attenuator switch with 1 dB per step\u003c\/li\u003e \u003cli\u003eAttack: 21-step rotary switch with time settings between 1 mS and 50 mS\u003c\/li\u003e \u003cli\u003eRelease: 21-step rotary switch with time settings between 0.2 S and 1.2 S\u003c\/li\u003e \u003cli\u003eOutput: 21-step attenuator switch with 2 dB per step for the first 5 steps and 1 dB per step for the last 15 steps\u003c\/li\u003e \u003cli\u003eSelectable output level (normal or +6 dB) of the output transformer\u003c\/li\u003e \u003c\/ul\u003e","brand":"Vacuvox","offers":[{"title":"Default Title","offer_id":44451282387047,"sku":"481225","price":7995.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8848\/5479\/files\/vacuvox-u23m-mastering-vari-mu-compressor-limiter-079-used_481225_1.jpg?v=1787096615"},{"product_id":"vacuvox-u23m-mastering-vari-mu-compressor-limiter-080-used","title":"Vacuvox U23m Mastering Vari-Mu Compressor\/Limiter #080 (Used)","description":"\u003cp\u003eThe \u003cstrong\u003eVacuvox U23m\u003c\/strong\u003e is a mastering version of the U23 vari-mu compressor\/limiter building upon the legacy of the Vacuvox CL-2 for which the Rohde \u0026amp; Schwarz U-23 broadcast limiter served as a basis. Several improvements have taken the design and functionality of the CL-2 a step further while preserving the euphonic sound of the original. The Vacuvox U23 has an all Class A vacuum tube audio path, and side-chain path based upon the original circuit of the Rohde \u0026amp; Schwarz U23. These ensure unparalleled performance and provide unrivaled headroom and transparency.\u003c\/p\u003e  \u003ch3 id=\"toc_0\"\u003eDESIGN AND FUNCTIONALITY\u003c\/h3\u003e  \u003cp\u003eThe Vacuvox U23m mastering compressor\/limiter is assembled entirely by hand and uses high-quality modern components. The custom-made transformers are faithful recreations of the original, sonically excellent, Rohde \u0026amp; Schwarz transformers. The four audio transformers are made of permalloy with 80% nickel and 20% iron content. The chokes and power supply are made of SiFi. The power transformer is upgraded for better noise performance and stability. A front panel layout, a modification of the output gain and the thresholds and two extra gain stages are the most significant improvements that have been incorporated in the Vacuvox U23m.\u003c\/p\u003e  \u003cp\u003e21-stepped switches for input, output, attack, release, and threshold are used for the U23m mastering version. These extend the use of a pair of U23m compressor limiters to critical stereo applications for many different genres of music. Even jazz and classical material can be mildly compressed with a perfect stereo balance and without sacrificing the sense of dynamics and producing unwanted artifacts.\u003c\/p\u003e  \u003cp\u003eThe various gain structure options from the Pad, Input, Gain and Threshold offer the possibility to create different kind and levels of saturation subtly. Therefore the sound can be varied between transparent, dense and fluid by lowering the threshold, driving the input transformer or driving the tubes.\u003c\/p\u003e   \u003cp\u003e\u003cem\u003eThe above features are included with both the U23 and U23m, the following are specific to the U23m:\u003c\/em\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eRatio: 7-step rotary switch with ratios 2:1, 3:1, 4:1, 5:1, 7:1, 9:1, 12:1\u003c\/li\u003e \u003cli\u003eInput: 21-step attenuator switch with 1 dB per step\u003c\/li\u003e \u003cli\u003eAttack: 21-step rotary switch with time settings between 1 mS and 50 mS\u003c\/li\u003e \u003cli\u003eRelease: 21-step rotary switch with time settings between 0.2 S and 1.2 S\u003c\/li\u003e \u003cli\u003eOutput: 21-step attenuator switch with 2 dB per step for the first 5 steps and 1 dB per step for the last 15 steps\u003c\/li\u003e \u003cli\u003eSelectable output level (normal or +6 dB) of the output transformer\u003c\/li\u003e \u003c\/ul\u003e","brand":"Vacuvox","offers":[{"title":"Default Title","offer_id":44451282419815,"sku":"481226","price":7995.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8848\/5479\/files\/vacuvox-u23m-mastering-vari-mu-compressor-limiter-080-used_481226_1.jpg?v=1787096615"},{"product_id":"vacuvox-dq95-passive-mastering-equalizer","title":"Vacuvox DQ-95 Stereo Mastering Equalizer","description":"\u003cp\u003eThe \u003cstrong\u003eVacuvox DQ-95\u003c\/strong\u003e is an analog stereo mastering equalizer that takes inspiration from three rare pieces of vintage studio gear: the EMI TG12412 mastering EQ, a rare Decca EQ from the 1950s, and a Klangfilm output amplifier. Featuring four parametric EQ bands with peak and shelf settings, optional mid\/side processing, and a premium tube amplification stage, the DQ-95 delivers analog vibe and versatility. The EMI TG12412 was a passive mastering equalizer developed in the early 1970s for Abbey Road's custom TG12410 mastering desks and is still in use today. Featuring four EQ bands per channel (each with stepped controls for Frequency, Gain\/Attenuation, and Shape), this legendary EQ has helped put the finishing touches on countless classic records.\u003c\/p\u003e\r\n\r\n\u003cp\u003eDecca's 1950s-era mastering consoles featured custom two-channel equalizers designed and built by Decca engineers for cutting-edge stereophonic sound. These mastering EQs featured bass and treble bands on each channel, each offering different frequency settings for shelf and peak shapes. Inspired by the Decca mastering EQ, the DQ-95's high- and low-shelf circuits add low-end control and high-end polish.\u003c\/p\u003e\r\n\r\n\u003cp\u003eKlangfilm was a German manufacturer of cinema sound systems known for their high-end amplifiers, equalizers, and loudspeakers. Founded in 1928 and shuttered in the '70s, Klangfilm's most popular products include the KLV Series cinema amplifiers and RZ062 a\/b equalizer modules. The DQ-95's tube amplification stage takes inspiration from Klangfilm's custom designs, providing clean makeup gain with a touch of vintage character.\u003c\/p\u003e","brand":"Vacuvox","offers":[{"title":"Default Title","offer_id":44451343040615,"sku":"212073","price":24495.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8848\/5479\/files\/vacuvox-dq-95-2026_212073_1.jpg?v=1787096870"},{"product_id":"vacuvox-v41-stereo-dual-mono-tube-microphone-preamp-steel-tubes-006-used","title":"Vacuvox V41 Stereo\/Dual-Mono Tube Microphone Preamp - Steel Tubes #006 (Used)","description":"\u003cp\u003eThe \u003cstrong\u003eVacuvox V41\u003c\/strong\u003e stereo\/dual-mono microphone preamp is a recreation of the ultra-rare Maihak (Telefunken) V41, widely considered to be the Holy Grail of preamps! The steel tube option available here uses NOS Telefunken EF12 steel tubes like the original. The Vacuvox V41 preamp performs exactly like the original in sound, frequency and phase behavior. It features an upgraded regulated power supply with a much lower noise floor than the original (\u0026lt;-90 dB). It is also more stable which results in a tighter bass end.\u003c\/p\u003e \u003cp\u003eThe Vacucox V41 has 5 dB more gain than the original by using the output transformer in a different way. This recreation also features a -20 dB pad, phase reverse, +48V phantom power, high-pass filter above 60 Hz, and an extra linear potentiometer to adjust the gain in between the 5 dB steps. Channels can be matched by an internal trimmer.\u003c\/p\u003e \u003cp\u003eThe V41 has two channels each with separate power supplies. Each channel has 6 transformers and 4 tubes. This version uses 1x EF12K, 2x EF12, and 1x EZ11 NOS tubes like the original Maihak V41. The transformers are custom-wound at the same factory used for the U23. Audio transformers are perfect replicas from the original Malotki made from the purest permalloy (80% nickel). Input and output transformers are shielded through numeral cans and the power transformer has a static shield to prevent noise and clicks coming in from the outside.\u003c\/p\u003e","brand":"Vacuvox","offers":[{"title":"Default Title","offer_id":44451387736167,"sku":"497684","price":8200.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8848\/5479\/files\/vacuvox-v41-stereo-dual-mono-tube-microphone-preamp-steel-tubes-006-used_497684_1.jpg?v=1787097044"},{"product_id":"vacuvox-u23m-mastering-vari-mu-compressor-limiter-pair-151-152-used","title":"Vacuvox U23m Mastering Vari-Mu Compressor\/Limiter - Pair #151\/152 (Used)","description":"\u003cp\u003eThe \u003cstrong\u003eVacuvox U23m\u003c\/strong\u003e is a mastering version of the U23 vari-mu compressor\/limiter building upon the legacy of the Vacuvox CL-2 for which the Rohde \u0026amp; Schwarz U-23 broadcast limiter served as a basis. Several improvements have taken the design and functionality of the CL-2 a step further while preserving the euphonic sound of the original. The Vacuvox U23 has an all Class A vacuum tube audio path, and side-chain path based upon the original circuit of the Rohde \u0026amp; Schwarz U23. These ensure unparalleled performance and provide unrivaled headroom and transparency.\u003c\/p\u003e  \u003ch3 id=\"toc_0\"\u003eDESIGN AND FUNCTIONALITY\u003c\/h3\u003e  \u003cp\u003eThe Vacuvox U23m mastering compressor\/limiter is assembled entirely by hand and uses high-quality modern components. The custom-made transformers are faithful recreations of the original, sonically excellent, Rohde \u0026amp; Schwarz transformers. The four audio transformers are made of permalloy with 80% nickel and 20% iron content. The chokes and power supply are made of SiFi. The power transformer is upgraded for better noise performance and stability. A front panel layout, a modification of the output gain and the thresholds and two extra gain stages are the most significant improvements that have been incorporated in the Vacuvox U23m.\u003c\/p\u003e  \u003cp\u003e21-stepped switches for input, output, attack, release, and threshold are used for the U23m mastering version. These extend the use of a pair of U23m compressor limiters to critical stereo applications for many different genres of music. Even jazz and classical material can be mildly compressed with a perfect stereo balance and without sacrificing the sense of dynamics and producing unwanted artifacts.\u003c\/p\u003e  \u003cp\u003eThe various gain structure options from the Pad, Input, Gain and Threshold offer the possibility to create different kind and levels of saturation subtly. Therefore the sound can be varied between transparent, dense and fluid by lowering the threshold, driving the input transformer or driving the tubes.\u003c\/p\u003e   \u003cp\u003e\u003cem\u003eThe above features are included with both the U23 and U23m, the following are specific to the U23m:\u003c\/em\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eRatio: 7-step rotary switch with ratios 2:1, 3:1, 4:1, 5:1, 7:1, 9:1, 12:1\u003c\/li\u003e \u003cli\u003eInput: 21-step attenuator switch with 1 dB per step\u003c\/li\u003e \u003cli\u003eAttack: 21-step rotary switch with time settings between 1 mS and 50 mS\u003c\/li\u003e \u003cli\u003eRelease: 21-step rotary switch with time settings between 0.2 S and 1.2 S\u003c\/li\u003e \u003cli\u003eOutput: 21-step attenuator switch with 2 dB per step for the first 5 steps and 1 dB per step for the last 15 steps\u003c\/li\u003e \u003cli\u003eSelectable output level (normal or +6 dB) of the output transformer\u003c\/li\u003e \u003c\/ul\u003e","brand":"Vacuvox","offers":[{"title":"Default Title","offer_id":44451392094311,"sku":"498553","price":15995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8848\/5479\/files\/vacuvox-u23m-mastering-vari-mu-compressor-limiter-pair-151-152-used_498553_1.jpg?v=1787097063"}],"url":"https:\/\/vintageking1.myshopify.com\/collections\/vacuvox.oembed","provider":"VINTAGE KING AUDIO","version":"1.0","type":"link"}