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Passive Preamplifier Audio Signal Boosting Transformer 600Ω: 3.5KΩ British Original Authentic for Smartphone PC

This is a gain-adjustable passive preamplifier (audio signal boosting transformer). Using British original authentic 600:3.5K boosting transformers (second-hand disassembled one) 148H, 8DB amplification, the maximum magnification time is 2.4 times, oscilloscope test bandwidth 20-20KHz;

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Passive Preamplifier Audio Signal Boosting Transformer 600Ω: 3.5KΩ British Original Authentic for Smartphone PC