{"product_id":"mesa-boogie-valvula-spax7-individual-768663","title":"MESA BOOGIE SPAX7 TUBE (INDIVIDUAL)","description":"\u003ch1 data-start=\"0\" data-end=\"40\"\u003eMESA BOOGIE SPAX7 VALVE (INDIVIDUAL)\u003c\/h1\u003e\u003ch3 data-start=\"42\" data-end=\"121\"\u003eMaximum stability and silence with the MESA BOOGIE SPAX7 VALVE (INDIVIDUAL)\u003c\/h3\u003e\u003cp data-start=\"123\" data-end=\"571\"\u003eThe \u003cstrong data-start=\"126\" data-end=\"168\"\u003eMESA BOOGIE SPAX7 VALVE (INDIVIDUAL)\u003c\/strong\u003e is a 12AX7-type \u003cstrong data-start=\"176\" data-end=\"197\"\u003epreamp tube\u003c\/strong\u003e specially selected and treated to offer the lowest microphonics, minimum noise, and maximum durability. It is designed for high-gain amplifiers or recording environments where tonal stability and vibration reduction are essential. Each unit undergoes a testing and selection process more rigorous than standard Mesa tubes.\u003c\/p\u003e\u003ch3 data-start=\"576\" data-end=\"644\"\u003eKey features of the MESA BOOGIE SPAX7 VALVE (INDIVIDUAL)\u003c\/h3\u003e\u003cul\u003e\n\n\u003cli\u003ePremium 12AX7 selection with ultra-low noise level\u003c\/li\u003e\n\n\u003cli\u003eMicrophonics and gain testing under real conditions\u003c\/li\u003e\n\n\u003cli\u003eInternal shielding with a metal “damping shield”\u003c\/li\u003e\n\n\u003cli\u003eGreater reliability in high-gain or reverb amps\u003c\/li\u003e\n\n\u003cli\u003eDirect replacement in any 12AX7 preamp socket\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\u003ch3 data-start=\"933\" data-end=\"998\"\u003eWhat makes the MESA BOOGIE SPAX7 VALVE (INDIVIDUAL) special?\u003c\/h3\u003e\u003cp data-start=\"1000\" data-end=\"1370\"\u003eUnlike standard 12AX7 tubes, each SPAX7 undergoes an individual control process that includes vibration, noise, and microphonics testing. This guarantees quieter and more stable operation even at high volume or under stage conditions. It is ideal for the first preamp position (V1), where noise and sensitivity are most critical.\u003c\/p\u003e\u003ch3 data-start=\"1464\" data-end=\"1536\"\u003eTechnical specifications of the MESA BOOGIE SPAX7 VALVE (INDIVIDUAL)\u003c\/h3\u003e\u003cul\u003e\n\n\u003cli\u003eType: Low-microphonics 12AX7A \/ ECC83S\u003c\/li\u003e\n\n\u003cli\u003eBase: Noval (9 pins)\u003c\/li\u003e\n\n\u003cli\u003eConfiguration: Dual high-gain triode\u003c\/li\u003e\n\n\u003cli\u003eFilament voltage: 6.3 V at 300 mA or 12.6 V at 150 mA\u003c\/li\u003e\n\n\u003cli\u003eAmplification factor (µ): 100\u003c\/li\u003e\n\n\u003cli\u003eTransconductance: Approx. 1.6 mA\/V\u003c\/li\u003e\n\n\u003cli\u003eMaximum plate voltage: 300 V\u003c\/li\u003e\n\n\u003cli\u003eMaximum plate dissipation: 1 W per triode\u003c\/li\u003e\n\n\u003cli\u003eInternal damping: SPAX7 Shield metal shielding\u003c\/li\u003e\n\n\u003cli\u003eRecommended use: First preamp position (V1), reverb driver, high-gain channel\u003c\/li\u003e\n\n\u003cli\u003eCompatibility: Direct replacement for 12AX7 \/ ECC83 in specified equipment\u003c\/li\u003e\n\n\u003cli\u003eNoise level: Ultra-low (Mesa “SPAX” selection)\u003c\/li\u003e\n\n\u003cli\u003eSales unit: Individual\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"MESA BOOGIE","offers":[{"title":"Default Title","offer_id":57315563766091,"sku":"750151F","price":35.49,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/0955\/7067\/files\/mesa-boogie-spax7-a_d2cb1deb-270a-4c16-bd77-50af739ef874.jpg?v=1779220538","url":"https:\/\/microfusa.com\/en-pt\/products\/mesa-boogie-valvula-spax7-individual-768663","provider":"microFusa","version":"1.0","type":"link"}