Audio Tubes Direct has over 4000 successful transactions on multiple websites with a 100% feedback rating. Imported from Slovakia, these brand new tubes have been tested on the industry's most reliable, voltage controlled testing equipment and exceed all manufacturer's specifications. They are guaranteed from the manufacturer to be new and free from any defects in materials or craftsmanship and are backed by our 30 Day Warranty. Preamp tubes have been tested for Gain (Mu), Transconductance (Gm) and microphonics. Power tubes have been tested and matched for Plate Current(lp) and Transconductance(Gm) with test results are printed on the box.
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