Welcome to TOT ALL Audio
{"id":6619362099246,"title":"Golden Age Premier | GA-251 MKII Large-diaphragm Tube Condenser Microphone","handle":"golden-age-project-ga-251-large-diaphragm-tube-condenser-microphone","description":"\u003cdiv data-css=\"tve-u-16b36aa662f\" class=\"tve-cb\"\u003e\n\u003cdiv data-css=\"tve-u-16b36cd38af\" class=\"thrv_wrapper thrv_text_element\"\u003e\n\u003ch2\u003e\u003cstrong\u003eGA-251 MKII Large-diaphragm Tube Condenser Mic\u003cbr\u003e\u003cimg width=\"100%\" src=\"https:\/\/mcusercontent.com\/9bc5829ebe3d3c2813f64db7c\/images\/f1d06077-6f6e-48ba-9821-0dd8713db5ad.png\" data-mce-fragment=\"1\" data-mce-src=\"https:\/\/mcusercontent.com\/9bc5829ebe3d3c2813f64db7c\/images\/f1d06077-6f6e-48ba-9821-0dd8713db5ad.png\"\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eHigh end, no compromise components and build quality\u003c\/li\u003e\n\u003cli\u003eHand made in small series, 50 units at a time, in a boutique style microphone workshop\u003c\/li\u003e\n\u003cli\u003eCapsules selected with very tight tolerances\u003c\/li\u003e\n\u003cli\u003eNew Old Stock Phillip 5840W super low noise pentode tube connected in triode mode\u003c\/li\u003e\n\u003cli\u003ePoint-to point wiring, using an expensive Rogers circuit board\u003c\/li\u003e\n\u003cli\u003eAll soldering points made with Mudorf Msolder Supreme Silver Gold solder\u003c\/li\u003e\n\u003cli\u003eSolid wood microphone box, sturdy metal flight case \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Telefunken ELA M 250\/251 was made for Telefunken by AKG after Neumann discontinued its OEM production of the Telefunken U-47. The Golden Age Premier GA-251 MKII is inspired by this truly classic microphone.\u003c\/p\u003e\n\u003cp\u003eThe GA-251 MKII shares the same design goal that was set for the GA-47: to offer the classic qualities and advantages that a vintage unit in perfect condition would provide and doing so at a low price point.\u003c\/p\u003e\n\u003cp\u003eThe MKII version has the following improvements:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA new CNC produced base plate made of brass.\u003c\/li\u003e\n\u003cli\u003eImproved, more even grille\u003c\/li\u003e\n\u003cli\u003eThe inner design is more tidy and stable using a an expensive Rogers circuit board with point-point wiring resulting in an ever more refined sound quality.\u003c\/li\u003e\n\u003cli\u003eA new metal flight case and black cardboard box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMic Body and Grille\u003c\/h3\u003e\n\u003cp\u003eThe mic body is made of brass, the grille is made of iron.\u003cbr\u003eThe grille, which is a critical component affecting the sound character, is similar to the one in the ELA M 251.\u003c\/p\u003e\n\u003ch3\u003eCapsule\u003c\/h3\u003e\n\u003cp\u003eThe GA-251 MKII uses a 34 mm K251 style capsule. Being a dual-sided one, it provides both cardioid and omni polar patterns. In order to get a good consistency between units, for each production run of 50 pcs GA-251 MKII units, approximately 200 capsules is evaluated in order to find 50 capsules with specifications that lie within the tight tolerances.\u003c\/p\u003e\n\u003cp\u003eThe sensitivity of the front and back side of the capsule do not differ more than 0,3 dB. The sensitivity between different capsules do not differ more than 0,5 dB.\u003c\/p\u003e\n\u003cp\u003eThe tight manufacturing tolerance will lead to a very good consistency between different GA-251 MKII units.\u003c\/p\u003e\n\u003cp\u003eThe capsule is specially designed to complement the electronic circuit of the GA-251 MKII to achieve a frequency response curve with a nice balance between the high, middle and low frequencies. The result is a very smooth sound with a warm bottom and airy top end just like ELA M 251.\u003c\/p\u003e\n\u003ch3\u003eTube\u003c\/h3\u003e\n\u003cp\u003eThe GA-251 MKII uses a NOS Phillip 5840W super low noise pentode tube connected in triode mode in order to decrease the noise. The tube has the following character:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBalanced sound response\u003c\/li\u003e\n\u003cli\u003eA smooth and warm sound character and a low noise level\u003c\/li\u003e\n\u003cli\u003eLong lifespan: The GA-251 MKII amplifier features a new proprietary circuit designed around the NOS 5840W tube.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eOutput Transformer\u003c\/h3\u003e\n\u003cp\u003eThe GA-251 MKII transformer is specially designed with a 10:1 AMI style dual bobbin transformer. It is made from Permalloy steel sheet from USA and enameled wire from Germany. It offers a wonderful sound character with a high resolution and great balance between the low, middle and high frequency bands.\u003c\/p\u003e\n\u003ch3\u003eCapacitors and Resistors\u003c\/h3\u003e\n\u003cp\u003eThe coupling capacitor is made by Solen from France. It is a high balanced film capacitor made from MKP material with pure oxygen-free copper connections. It has a very delicate and balanced sound.\u003cbr\u003eThe capsule capacitor uses NOS Siemens antique grade polystyrene capacitor to reduce loss.\u003c\/p\u003e\n\u003cp\u003eThe tube cathode bypass capacitor uses an ELNA OFC Cerafine high end hifi capacitor from Japan with oxygen free copper connections exhibiting a very sweet and delicate character, not the least for vocals. The other capacitors are of the low loss polystyrene type.\u003c\/p\u003e\n\u003cp\u003eThe resistor used for setting the capsule voltage is a high quality DALE 1% metal film resistor. The result is a very stable and consistent operating level leading to better consistency between different GA-251 MKII units.\u003c\/p\u003e\n\u003cp\u003eThe plate resistor uses a non-inductive resistor of the United States IRC audio with pure copper connections. The sound level is rich and full bodied.\u003c\/p\u003e\n\u003ch3\u003eMic Interior\u003c\/h3\u003e\n\u003cp\u003eThe electronic circuit is built with point-to point wiring, All soldering points made with Mudorf Msolder Supreme silver gold solder\u003cbr\u003eAll of the inside wire use pure silver wire and decrease the loss during the circuit transmission, also it can ensure the sound quality is transparent.\u003c\/p\u003e\n\u003cp\u003eAll components which are connected to electrical ground is connected to the ground plane on the circuit board. All other component connections use point to point wiring which results in virtually zero loss and crosstalk.\u003c\/p\u003e\n\u003ch3\u003ePower Supply Transformer and Electrolytic Capacitors\u003c\/h3\u003e\n\u003cp\u003eThe vintage style power supply PSU uses a high power R-style transformer with a low noise level and minimum stray field. A simple but effective circuit uses dual-stage filtering for the filament voltage. The High voltage is also precisely filtered and stabilized using an ON semiconductor zener diode.\u003c\/p\u003e\n\u003cp\u003eThe polar pattern switch is placed on the power supply so that the recording engineer can change the polar pattern between Cardioid and Omni remotely. A ground lift switch will help to solve mains power related noise issues that can appear in some cases\u003c\/p\u003e\n\u003ch3\u003eMic Cable\u003c\/h3\u003e\n\u003cp\u003eThe cable is specially produced using 99,99% pure oxygen-free copper, Teflon insulation, tin foil and 98% kitmesh, ie with a very high braided density of the cable shield. It has a very open and smooth sound. The mic connector is an aviation style plug providing solid connections and a long life.\u003c\/p\u003e\n\u003ch3 style=\"font-weight: 400;\" data-mce-style=\"font-weight: 400;\"\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e Maximum SPL: 136dB\u003c\/li\u003e\n\u003cli\u003e Frequency range: 20Hz-20KHz\u003c\/li\u003e\n\u003cli\u003e Signal\/Noise: 85dBA\u003c\/li\u003e\n\u003cli\u003e Impedance:\u003cspan\u003e \u003c\/span\u003e\u0026lt;200 Ohm\u003c\/li\u003e\n\u003cli\u003e Sensitivity: 16mV\/Pa\u003c\/li\u003e\n\u003cli\u003e Microphone dimensions: 50mm (diameter) * 250mm (length)\u003c\/li\u003e\n\u003cli\u003e Microphone weight: 0,6kg\u003c\/li\u003e\n\u003cli\u003e PSU dimensions: 200mm (length) * 100mm (width) * 100mm (height)\u003c\/li\u003e\n\u003cli\u003e PSU weight: 1,5kg\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp style=\"font-weight: 400;\" data-mce-style=\"font-weight: 400;\"\u003eThe GA-251 MKII is delivered in a metal flight case with power supply, cable, shock mount and a box made of solid wood for the microphone.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","published_at":"2021-09-15T09:13:28+02:00","created_at":"2021-07-04T20:38:37+02:00","vendor":"Golden Age Premier","type":"Condenser Microphones","tags":["Condenser Microphones","Golden Age Premier","Microphones","Price Range_$1500 to $2000","shop by brand_Golden Age Premier","Shop by category_Condenser Microphones","Shop by category_Microphones","Tube"],"price":190000,"price_min":190000,"price_max":190000,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":39434179084334,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"GA251MkII","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Golden Age Premier | GA-251 MKII Large-diaphragm Tube Condenser Microphone","public_title":null,"options":["Default Title"],"price":190000,"weight":0,"compare_at_price":null,"inventory_quantity":0,"inventory_management":null,"inventory_policy":"continue","barcode":""}],"images":["\/\/cdn.shopify.com\/s\/files\/1\/0292\/6125\/products\/GA251-Trans-BG.png?v=1638039314","\/\/cdn.shopify.com\/s\/files\/1\/0292\/6125\/products\/2e166196-a4fd-4a49-ba6b-ad38518482b7.png?v=1638371446","\/\/cdn.shopify.com\/s\/files\/1\/0292\/6125\/products\/808e0ff4-287b-4d1e-85af-d048fe352919.png?v=1638371478","\/\/cdn.shopify.com\/s\/files\/1\/0292\/6125\/products\/aa114abc-ec10-4ad3-982a-80b861c513fc.png?v=1638371485"],"featured_image":"\/\/cdn.shopify.com\/s\/files\/1\/0292\/6125\/products\/GA251-Trans-BG.png?v=1638039314","options":["Title"],"media":[{"alt":null,"id":21014300164142,"position":1,"preview_image":{"aspect_ratio":1.0,"height":1000,"width":1000,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0292\/6125\/products\/GA251-Trans-BG.png?v=1638039314"},"aspect_ratio":1.0,"height":1000,"media_type":"image","src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0292\/6125\/products\/GA251-Trans-BG.png?v=1638039314","width":1000},{"alt":null,"id":21014300098606,"position":2,"preview_image":{"aspect_ratio":1.333,"height":360,"width":480,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0292\/6125\/products\/hqdefault_417623e0-ca32-4224-a589-6c1305b5a14e.jpg?v=1638039283"},"aspect_ratio":1.77,"external_id":"bON189miHHA","host":"youtube","media_type":"external_video"},{"alt":null,"id":21032658599982,"position":3,"preview_image":{"aspect_ratio":1.0,"height":1000,"width":1000,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0292\/6125\/products\/2e166196-a4fd-4a49-ba6b-ad38518482b7.png?v=1638371446"},"aspect_ratio":1.0,"height":1000,"media_type":"image","src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0292\/6125\/products\/2e166196-a4fd-4a49-ba6b-ad38518482b7.png?v=1638371446","width":1000},{"alt":null,"id":21032661549102,"position":4,"preview_image":{"aspect_ratio":1.0,"height":1000,"width":1000,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0292\/6125\/products\/808e0ff4-287b-4d1e-85af-d048fe352919.png?v=1638371478"},"aspect_ratio":1.0,"height":1000,"media_type":"image","src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0292\/6125\/products\/808e0ff4-287b-4d1e-85af-d048fe352919.png?v=1638371478","width":1000},{"alt":null,"id":21032662171694,"position":5,"preview_image":{"aspect_ratio":1.0,"height":1000,"width":1000,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0292\/6125\/products\/aa114abc-ec10-4ad3-982a-80b861c513fc.png?v=1638371485"},"aspect_ratio":1.0,"height":1000,"media_type":"image","src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0292\/6125\/products\/aa114abc-ec10-4ad3-982a-80b861c513fc.png?v=1638371485","width":1000}],"content":"\u003cdiv data-css=\"tve-u-16b36aa662f\" class=\"tve-cb\"\u003e\n\u003cdiv data-css=\"tve-u-16b36cd38af\" class=\"thrv_wrapper thrv_text_element\"\u003e\n\u003ch2\u003e\u003cstrong\u003eGA-251 MKII Large-diaphragm Tube Condenser Mic\u003cbr\u003e\u003cimg width=\"100%\" src=\"https:\/\/mcusercontent.com\/9bc5829ebe3d3c2813f64db7c\/images\/f1d06077-6f6e-48ba-9821-0dd8713db5ad.png\" data-mce-fragment=\"1\" data-mce-src=\"https:\/\/mcusercontent.com\/9bc5829ebe3d3c2813f64db7c\/images\/f1d06077-6f6e-48ba-9821-0dd8713db5ad.png\"\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eHigh end, no compromise components and build quality\u003c\/li\u003e\n\u003cli\u003eHand made in small series, 50 units at a time, in a boutique style microphone workshop\u003c\/li\u003e\n\u003cli\u003eCapsules selected with very tight tolerances\u003c\/li\u003e\n\u003cli\u003eNew Old Stock Phillip 5840W super low noise pentode tube connected in triode mode\u003c\/li\u003e\n\u003cli\u003ePoint-to point wiring, using an expensive Rogers circuit board\u003c\/li\u003e\n\u003cli\u003eAll soldering points made with Mudorf Msolder Supreme Silver Gold solder\u003c\/li\u003e\n\u003cli\u003eSolid wood microphone box, sturdy metal flight case \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Telefunken ELA M 250\/251 was made for Telefunken by AKG after Neumann discontinued its OEM production of the Telefunken U-47. The Golden Age Premier GA-251 MKII is inspired by this truly classic microphone.\u003c\/p\u003e\n\u003cp\u003eThe GA-251 MKII shares the same design goal that was set for the GA-47: to offer the classic qualities and advantages that a vintage unit in perfect condition would provide and doing so at a low price point.\u003c\/p\u003e\n\u003cp\u003eThe MKII version has the following improvements:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA new CNC produced base plate made of brass.\u003c\/li\u003e\n\u003cli\u003eImproved, more even grille\u003c\/li\u003e\n\u003cli\u003eThe inner design is more tidy and stable using a an expensive Rogers circuit board with point-point wiring resulting in an ever more refined sound quality.\u003c\/li\u003e\n\u003cli\u003eA new metal flight case and black cardboard box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMic Body and Grille\u003c\/h3\u003e\n\u003cp\u003eThe mic body is made of brass, the grille is made of iron.\u003cbr\u003eThe grille, which is a critical component affecting the sound character, is similar to the one in the ELA M 251.\u003c\/p\u003e\n\u003ch3\u003eCapsule\u003c\/h3\u003e\n\u003cp\u003eThe GA-251 MKII uses a 34 mm K251 style capsule. Being a dual-sided one, it provides both cardioid and omni polar patterns. In order to get a good consistency between units, for each production run of 50 pcs GA-251 MKII units, approximately 200 capsules is evaluated in order to find 50 capsules with specifications that lie within the tight tolerances.\u003c\/p\u003e\n\u003cp\u003eThe sensitivity of the front and back side of the capsule do not differ more than 0,3 dB. The sensitivity between different capsules do not differ more than 0,5 dB.\u003c\/p\u003e\n\u003cp\u003eThe tight manufacturing tolerance will lead to a very good consistency between different GA-251 MKII units.\u003c\/p\u003e\n\u003cp\u003eThe capsule is specially designed to complement the electronic circuit of the GA-251 MKII to achieve a frequency response curve with a nice balance between the high, middle and low frequencies. The result is a very smooth sound with a warm bottom and airy top end just like ELA M 251.\u003c\/p\u003e\n\u003ch3\u003eTube\u003c\/h3\u003e\n\u003cp\u003eThe GA-251 MKII uses a NOS Phillip 5840W super low noise pentode tube connected in triode mode in order to decrease the noise. The tube has the following character:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBalanced sound response\u003c\/li\u003e\n\u003cli\u003eA smooth and warm sound character and a low noise level\u003c\/li\u003e\n\u003cli\u003eLong lifespan: The GA-251 MKII amplifier features a new proprietary circuit designed around the NOS 5840W tube.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eOutput Transformer\u003c\/h3\u003e\n\u003cp\u003eThe GA-251 MKII transformer is specially designed with a 10:1 AMI style dual bobbin transformer. It is made from Permalloy steel sheet from USA and enameled wire from Germany. It offers a wonderful sound character with a high resolution and great balance between the low, middle and high frequency bands.\u003c\/p\u003e\n\u003ch3\u003eCapacitors and Resistors\u003c\/h3\u003e\n\u003cp\u003eThe coupling capacitor is made by Solen from France. It is a high balanced film capacitor made from MKP material with pure oxygen-free copper connections. It has a very delicate and balanced sound.\u003cbr\u003eThe capsule capacitor uses NOS Siemens antique grade polystyrene capacitor to reduce loss.\u003c\/p\u003e\n\u003cp\u003eThe tube cathode bypass capacitor uses an ELNA OFC Cerafine high end hifi capacitor from Japan with oxygen free copper connections exhibiting a very sweet and delicate character, not the least for vocals. The other capacitors are of the low loss polystyrene type.\u003c\/p\u003e\n\u003cp\u003eThe resistor used for setting the capsule voltage is a high quality DALE 1% metal film resistor. The result is a very stable and consistent operating level leading to better consistency between different GA-251 MKII units.\u003c\/p\u003e\n\u003cp\u003eThe plate resistor uses a non-inductive resistor of the United States IRC audio with pure copper connections. The sound level is rich and full bodied.\u003c\/p\u003e\n\u003ch3\u003eMic Interior\u003c\/h3\u003e\n\u003cp\u003eThe electronic circuit is built with point-to point wiring, All soldering points made with Mudorf Msolder Supreme silver gold solder\u003cbr\u003eAll of the inside wire use pure silver wire and decrease the loss during the circuit transmission, also it can ensure the sound quality is transparent.\u003c\/p\u003e\n\u003cp\u003eAll components which are connected to electrical ground is connected to the ground plane on the circuit board. All other component connections use point to point wiring which results in virtually zero loss and crosstalk.\u003c\/p\u003e\n\u003ch3\u003ePower Supply Transformer and Electrolytic Capacitors\u003c\/h3\u003e\n\u003cp\u003eThe vintage style power supply PSU uses a high power R-style transformer with a low noise level and minimum stray field. A simple but effective circuit uses dual-stage filtering for the filament voltage. The High voltage is also precisely filtered and stabilized using an ON semiconductor zener diode.\u003c\/p\u003e\n\u003cp\u003eThe polar pattern switch is placed on the power supply so that the recording engineer can change the polar pattern between Cardioid and Omni remotely. A ground lift switch will help to solve mains power related noise issues that can appear in some cases\u003c\/p\u003e\n\u003ch3\u003eMic Cable\u003c\/h3\u003e\n\u003cp\u003eThe cable is specially produced using 99,99% pure oxygen-free copper, Teflon insulation, tin foil and 98% kitmesh, ie with a very high braided density of the cable shield. It has a very open and smooth sound. The mic connector is an aviation style plug providing solid connections and a long life.\u003c\/p\u003e\n\u003ch3 style=\"font-weight: 400;\" data-mce-style=\"font-weight: 400;\"\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e Maximum SPL: 136dB\u003c\/li\u003e\n\u003cli\u003e Frequency range: 20Hz-20KHz\u003c\/li\u003e\n\u003cli\u003e Signal\/Noise: 85dBA\u003c\/li\u003e\n\u003cli\u003e Impedance:\u003cspan\u003e \u003c\/span\u003e\u0026lt;200 Ohm\u003c\/li\u003e\n\u003cli\u003e Sensitivity: 16mV\/Pa\u003c\/li\u003e\n\u003cli\u003e Microphone dimensions: 50mm (diameter) * 250mm (length)\u003c\/li\u003e\n\u003cli\u003e Microphone weight: 0,6kg\u003c\/li\u003e\n\u003cli\u003e PSU dimensions: 200mm (length) * 100mm (width) * 100mm (height)\u003c\/li\u003e\n\u003cli\u003e PSU weight: 1,5kg\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp style=\"font-weight: 400;\" data-mce-style=\"font-weight: 400;\"\u003eThe GA-251 MKII is delivered in a metal flight case with power supply, cable, shock mount and a box made of solid wood for the microphone.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e"}

Golden Age Premier | GA-251 MKII Large-diaphragm Tube Condenser Microphone

Product Description
$1,900.00
Maximum quantity available reached.

GA-251 MKII Large-diaphragm Tube Condenser Mic

  • High end, no compromise components and build quality
  • Hand made in small series, 50 units at a time, in a boutique style microphone workshop
  • Capsules selected with very tight tolerances
  • New Old Stock Phillip 5840W super low noise pentode tube connected in triode mode
  • Point-to point wiring, using an expensive Rogers circuit board
  • All soldering points made with Mudorf Msolder Supreme Silver Gold solder
  • Solid wood microphone box, sturdy metal flight case 

The Telefunken ELA M 250/251 was made for Telefunken by AKG after Neumann discontinued its OEM production of the Telefunken U-47. The Golden Age Premier GA-251 MKII is inspired by this truly classic microphone.

The GA-251 MKII shares the same design goal that was set for the GA-47: to offer the classic qualities and advantages that a vintage unit in perfect condition would provide and doing so at a low price point.

The MKII version has the following improvements:

  • A new CNC produced base plate made of brass.
  • Improved, more even grille
  • The inner design is more tidy and stable using a an expensive Rogers circuit board with point-point wiring resulting in an ever more refined sound quality.
  • A new metal flight case and black cardboard box

Mic Body and Grille

The mic body is made of brass, the grille is made of iron.
The grille, which is a critical component affecting the sound character, is similar to the one in the ELA M 251.

Capsule

The GA-251 MKII uses a 34 mm K251 style capsule. Being a dual-sided one, it provides both cardioid and omni polar patterns. In order to get a good consistency between units, for each production run of 50 pcs GA-251 MKII units, approximately 200 capsules is evaluated in order to find 50 capsules with specifications that lie within the tight tolerances.

The sensitivity of the front and back side of the capsule do not differ more than 0,3 dB. The sensitivity between different capsules do not differ more than 0,5 dB.

The tight manufacturing tolerance will lead to a very good consistency between different GA-251 MKII units.

The capsule is specially designed to complement the electronic circuit of the GA-251 MKII to achieve a frequency response curve with a nice balance between the high, middle and low frequencies. The result is a very smooth sound with a warm bottom and airy top end just like ELA M 251.

Tube

The GA-251 MKII uses a NOS Phillip 5840W super low noise pentode tube connected in triode mode in order to decrease the noise. The tube has the following character:

  • Balanced sound response
  • A smooth and warm sound character and a low noise level
  • Long lifespan: The GA-251 MKII amplifier features a new proprietary circuit designed around the NOS 5840W tube.

Output Transformer

The GA-251 MKII transformer is specially designed with a 10:1 AMI style dual bobbin transformer. It is made from Permalloy steel sheet from USA and enameled wire from Germany. It offers a wonderful sound character with a high resolution and great balance between the low, middle and high frequency bands.

Capacitors and Resistors

The coupling capacitor is made by Solen from France. It is a high balanced film capacitor made from MKP material with pure oxygen-free copper connections. It has a very delicate and balanced sound.
The capsule capacitor uses NOS Siemens antique grade polystyrene capacitor to reduce loss.

The tube cathode bypass capacitor uses an ELNA OFC Cerafine high end hifi capacitor from Japan with oxygen free copper connections exhibiting a very sweet and delicate character, not the least for vocals. The other capacitors are of the low loss polystyrene type.

The resistor used for setting the capsule voltage is a high quality DALE 1% metal film resistor. The result is a very stable and consistent operating level leading to better consistency between different GA-251 MKII units.

The plate resistor uses a non-inductive resistor of the United States IRC audio with pure copper connections. The sound level is rich and full bodied.

Mic Interior

The electronic circuit is built with point-to point wiring, All soldering points made with Mudorf Msolder Supreme silver gold solder
All of the inside wire use pure silver wire and decrease the loss during the circuit transmission, also it can ensure the sound quality is transparent.

All components which are connected to electrical ground is connected to the ground plane on the circuit board. All other component connections use point to point wiring which results in virtually zero loss and crosstalk.

Power Supply Transformer and Electrolytic Capacitors

The vintage style power supply PSU uses a high power R-style transformer with a low noise level and minimum stray field. A simple but effective circuit uses dual-stage filtering for the filament voltage. The High voltage is also precisely filtered and stabilized using an ON semiconductor zener diode.

The polar pattern switch is placed on the power supply so that the recording engineer can change the polar pattern between Cardioid and Omni remotely. A ground lift switch will help to solve mains power related noise issues that can appear in some cases

Mic Cable

The cable is specially produced using 99,99% pure oxygen-free copper, Teflon insulation, tin foil and 98% kitmesh, ie with a very high braided density of the cable shield. It has a very open and smooth sound. The mic connector is an aviation style plug providing solid connections and a long life.

Specifications:

  1.  Maximum SPL: 136dB
  2.  Frequency range: 20Hz-20KHz
  3.  Signal/Noise: 85dBA
  4.  Impedance: <200 Ohm
  5.  Sensitivity: 16mV/Pa
  6.  Microphone dimensions: 50mm (diameter) * 250mm (length)
  7.  Microphone weight: 0,6kg
  8.  PSU dimensions: 200mm (length) * 100mm (width) * 100mm (height)
  9.  PSU weight: 1,5kg

The GA-251 MKII is delivered in a metal flight case with power supply, cable, shock mount and a box made of solid wood for the microphone.

Sku: GA251MkII

Related products