{"title":"Power Modules","description":"\u003cp\u003e\u003cstrong\u003eWhy a Power Module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAn externally polarized condenser measurement microphone cannot work on its own. It needs to be connected to hardware that can act as an interface between the raw signal output and the data acquisition unit or measurement device. The Power Module is such an interface that improves the performance and reliability of the measurement chain.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIt provides polarization voltage for the transducer, ensuring that the microphone gets the charging voltage it needs.\u003c\/li\u003e\n\u003cli\u003eIt provides supply voltage for the microphone preamplifier. The preamplifier acts as a unity gain impedance converter. It provides a certain amount of line drive capability by providing a low output impedance and output current, making it possible to transmit the signal from the transducer to the Power Module without significant degradation.\u003c\/li\u003e\n\u003cli\u003eA power module can provide amplification or attenuation to the signal, thus making it possible to fine tune the measurement chain to the signals being measured and the hardware being used.\u003c\/li\u003e\n\u003cli\u003eSelectable filters make it possible to exclude unwanted noise from the measurement, e.g., wind-induced noise from outdoor measurements.\u003c\/li\u003e\n\u003cli\u003eOverload detection makes it possible to validate the measurements and is a useful tool in monitoring setups.\u003c\/li\u003e\n\u003cli\u003eWhen a Power Module with gain is used, you can use longer cables because of the power module's ability to deliver current.\u003c\/li\u003e\n\u003cli\u003eA Power module introduces electrical isolation \u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eGRAS' range of power modules cover solutions for electroacoustic applications (LEMO), intensity probes (LEMO), lownoise microphones (LEMO) and power modules with traditional power supply (LEMO) as well as power modules with constant current power (CCP) that have the ability to take advantage of GRAS SysCheck2™-enabled microphones.\u003c\/p\u003e","products":[{"product_id":"gras-12aa2-channel-power-module-with-gain-filters-and-syscheck-generator","title":"GRAS 12AA 2-Channel Power Module with gain, filters and SysCheck generator","description":"The GRAS 12AA can be powered either by internal standard batteries or an external DC supply (12 V-18 V), e.g. a mains\/line adapter. It is built into a sturdy anodized aluminum cabinet. The polarization voltage for the microphone fitted to the preamplifier can be set to 0 V for prepolarized microphones or 200 V for externally polarized microphones.","brand":"GRAS","offers":[{"title":"Default Title","offer_id":48310141387085,"sku":"12AA","price":0.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/9344\/9805\/files\/GRAS_12AA_HIGH_TransBG.png?v=1701172985"},{"product_id":"gras-12ab2-channel-power-module-for-gras-intensity-probes","title":"GRAS 12AB 2-Channel Power Module for GRAS Intensity Probes","description":"The 12AB is built into a sturdy anodized aluminum cabinet and can be powered either by internal standard batteries or an external DC supply (12 V-18 V), e.g. a mains\/line adapter.","brand":"GRAS","offers":[{"title":"Default Title","offer_id":48310141747533,"sku":"12AB","price":0.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/9344\/9805\/files\/GRAS_12AB_2020.png?v=1701172992"},{"product_id":"gras-12ac6-channel-power-module-for-gras-vector-intensity-probe","title":"GRAS 12AC 6-Channel Power Module for GRAS Vector-intensity Probe","description":"GRAS 12AC 6-Channel Power Module for GRAS Vector-intensity Probe","brand":"GRAS","offers":[{"title":"Default Title","offer_id":48310142107981,"sku":"12AC","price":0.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/9344\/9805\/files\/GRAS_12AB_2020_ea676af1-6f0b-46f2-9e8e-a2df15fb96af.png?v=1701172998"},{"product_id":"gras-12ad1-channel-power-module","title":"GRAS 12AD 1-Channel Power Module","description":"The 12AD can be powered either by internal standard batteries or an external DC supply (4.5 V- 24 V), e.g. a mains\/line adapter. It is built into a sturdy anodized aluminium cabinet.The polarization voltage for the microphone fitted to the preamplifier can be set to 0 V — for prepolarized microphones, or 200 V — for externally polarized microphones.","brand":"GRAS","offers":[{"title":"Default Title","offer_id":48310142435661,"sku":"12AD","price":0.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/9344\/9805\/files\/GRAS_12AD_2020.png?v=1701173006"},{"product_id":"gras-12ag8-channel-power-module-with-gain-filters-and-syscheck-generator","title":"GRAS 12AG 8-Channel Power Module with gain, filters and SysCheck generator","description":"The 12AG can be powered either from a mains\/line supply or from an external DC supply (12 V - 18 V), e.g. a car battery. It is built into a sturdy anodized aluminium cabinet.","brand":"GRAS","offers":[{"title":"Default Title","offer_id":48310146007373,"sku":"12AG","price":0.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/9344\/9805\/files\/GRAS_12AD_2020_7f9d8283-7494-46b6-8e3e-c5fcfdca4269.png?v=1701173012"},{"product_id":"gras-12ak1-channel-power-module-with-gain-filters-and-syscheck-generator","title":"GRAS 12AK 1-Channel Power Module with gain, filters and SysCheck generator","description":"The 12AK can be powered either by internal standard batteries or an external DC supply (12 V - 18 V), e.g. a mains\/line adapter. It is built into a sturdy anodized aluminium cabinet.","brand":"GRAS","offers":[{"title":"Default Title","offer_id":48310149480781,"sku":"12AK","price":0.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/9344\/9805\/files\/GRAS_12AD_2020_937bf681-700d-4e93-85fe-6b8bbaf45655.png?v=1701173019"},{"product_id":"gras-12al1-channel-ccp-power-module-with-a-weighting-filter","title":"GRAS 12AL 1-Channel CCP Power Module with A-weighting filter","description":"The 12AL will supply a transducer with a constant current of 4 mA. It has a wide operating frequency range from about 1 Hz (depending on load impedance) to well over 200 kHz. It also has an A-weighting filter that can be switched in or out.","brand":"GRAS","offers":[{"title":"Default Title","offer_id":48310149710157,"sku":"12AL","price":0.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/9344\/9805\/files\/12AL_HiRes-RGB.png?v=1701173026"},{"product_id":"gras-12an4-channel-power-module","title":"GRAS 12AN 4-Channel Power Module","description":"The 12AN Power Module is for general use in acoustic measurements both in the laboratory and in the field. If you are looking for a cost-effective solution or a multi-channel power module with direct coupling (no filters) to the output, the 12AN Power Module is a logical choice.","brand":"GRAS","offers":[{"title":"Default Title","offer_id":48310150070605,"sku":"12AN","price":0.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/9344\/9805\/files\/12AN_HiRes-RGB.png?v=1701173033"},{"product_id":"gras-12aq2-channel-universal-power-module-with-signal-conditioning-and-pc-interface","title":"GRAS 12AQ 2-Channel Universal Power Module with signal conditioning and PC interface","description":"It has facilities for both manual control and remote control. Manual control is via its front-panel switches and push-buttons. Remote control is via its RS232 interface.The 12AQ is for general use in acoustic measurements as well as for intensity measurements; both in the laboratory and in the field.","brand":"GRAS","offers":[{"title":"Default Title","offer_id":48310150398285,"sku":"12AQ","price":0.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/9344\/9805\/files\/GRAS_12AQ_2020.png?v=1701173039"},{"product_id":"gras-12ar2-channel-power-module","title":"GRAS 12AR 2-Channel Power Module","description":"The 12AR can be powered either by internal standard batteries or an external DC supply (4.5 V- 24 V), e.g. a mains\/line adapter. It is built into a sturdy anodized aluminum cabinet.The polarization voltage for the microphones fitted to the preamplifiers can be set to 0 V — for prepolarized microphones, or 200 V — for externally polarized microphones.","brand":"GRAS","offers":[{"title":"Default Title","offer_id":48310150660429,"sku":"12AR","price":0.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/9344\/9805\/files\/GRAS_12AR_TransBG_LOW_2020.png?v=1701173046"},{"product_id":"gras-12au1-channel-universal-power-module-with-signal-conditioning-and-power-amplifier","title":"GRAS 12AU 1-Channel Universal Power Module with signal conditioning and power amplifier","description":"With the 12AU, you can control the loudspeaker amplifier and microphone conditioner simultaneously.The 12AU is remote-controlled via its USB interface and a control program for Windows. You can operate the 12AU using a graphical user interface or by entering commands. Multiple 12AUs can be controlled from the same PC.","brand":"GRAS","offers":[{"title":"Default Title","offer_id":48310150955341,"sku":"12AU","price":0.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/9344\/9805\/files\/12AU_HiRes-RGB.png?v=1701173052"},{"product_id":"gras-12ax4-channel-ccp-power-module-with-gain","title":"GRAS 12AX 4-Channel CCP Power Module with Gain","description":"The GRAS 12AX is a constant current power module for powering 4 CCP preamplifiers\/microphone sets.It is optimized for integration into a production environment. The anodized enclosure is sturdy and offers good protection against dirt, dust, and moisture.","brand":"GRAS","offers":[{"title":"Default Title","offer_id":48310151053645,"sku":"12AX","price":0.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/9344\/9805\/files\/12AX_TransBG-WithShadow_HiRes-RGB.png?v=1701173059"},{"product_id":"gras-12hf1-channel-power-module-for-low-noise-systems","title":"GRAS 12HF 1-Channel Power Module for Low-noise Systems","description":"The 12HF provides:\u003cul id=\"content_sub\"\u003e \t\u003cli class=\"firstItem\"\u003epolarization voltage (200 V) for the condenser microphone\u003c\/li\u003e \t\u003cli\u003evoltage supplies (±15 V) for powering the microphone preamplifier\u003c\/li\u003e \t\u003cli class=\"lastItem\"\u003ea front panel switch response for selecting pressure or free field setting\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GRAS","offers":[{"title":"Default Title","offer_id":48310151348557,"sku":"12HF","price":0.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/9344\/9805\/files\/12HF_HiRes-RGB.png?v=1701173065"},{"product_id":"gras-12hm10-channel-power-module-for-lownoise-systems","title":"GRAS 12HM 10-Channel Power Module for Lownoise Systems","description":"The 12HM provides:\u003cul id=\"content_sub\"\u003e \t\u003cli class=\"firstItem\"\u003epolarization voltage (200 V) for up to 10 condenser microphones\u003c\/li\u003e \t\u003cli\u003evoltage supplies (±15 V) for powering up to 10 microphone preamplifiers\u003c\/li\u003e \t\u003cli\u003eindividual response setting, pressure or free field, for each channel\u003c\/li\u003e \t\u003cli class=\"lastItem\"\u003eindividual gain adjustement of ±3 dB for each channel\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GRAS","offers":[{"title":"Default Title","offer_id":48310151676237,"sku":"12HM","price":0.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/9344\/9805\/files\/12HM_HiRes-RGB.png?v=1701173072"},{"product_id":"gras-12ba1-channel-ccp-power-module-with-teds-support","title":"GRAS 12BA 1-Channel CCP Power Module with TEDS Support","description":"The GRAS 12BA  is a single-channel USB-powered CCP power module with TEDS support.It provides power to one microphone set without signal degradation, gain modification, or attenuation.","brand":"GRAS","offers":[{"title":"Default Title","offer_id":48310190833997,"sku":"12BA","price":0.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/9344\/9805\/files\/12BAFront.png?v=1701174861"},{"product_id":"gras-12bb4-channel-ccp-power-module-with-teds-support","title":"GRAS 12BB 4-Channel CCP Power Module with TEDS Support","description":"The GRAS 12BB  is a four-channel USB-powered CCP power module with TEDS support.\n\nIt provides power to four microphone sets without signal degradation, gain modification, or attenuation.","brand":"GRAS","offers":[{"title":"Default Title","offer_id":48310193848653,"sku":"12BB","price":0.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/9344\/9805\/files\/12BBFront.png?v=1701174868"},{"product_id":"gras-12be-2-channel-ccp-power-module-with-teds-support","title":"GRAS 12BE 2-Channel CCP Power Module with TEDS Support","description":"\u003cp\u003eThe GRAS 12BE  is a two-channel USB-powered CCP power module with TEDS support.It provides power to one microphone set without signal degradation, gain modification, or attenuation.\u003c\/p\u003e","brand":"GRAS","offers":[{"title":"Default Title","offer_id":49929215541581,"sku":"12BE","price":0.0,"currency_code":"DKK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/9344\/9805\/files\/12BEQuarterViewFrontWithLEDs.jpg?v=1722419691"},{"product_id":"demo-gras-12be-2-channel-ccp-power-module-with-teds-support","title":"DEMO - 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