Product Summary

These must be the most exotic European audio tubes! So elusive they're even unheard of in many parts of the world. Not many of these tubes are around, either, let alone a strong matched pair! Although lesser known than big names like Telefunken and Siemens, they are just as remarkable as any other German-made tubes and have been the go-to tubes for guitar amplifier users. 

Sound Qualities

Like most German tubes, they are characterized by an impressive open "air" at the top end, and the soundstage is large, even in mono applications such as my classical vinyl records from the early '50s, these tubes  provides you with a full 3-D imaging. The midrange is ruler flat,  a.k.a. natural sound, and the bass is tight and accurate. One very unique feature of Lorenz tubes is the fine sense of dynamics you get from anything you play - it feels you are enveloped by an invisible "musical body" that you can't escape from and it's cerebrally joyful. Last but certainly not the least, as the legend goes for all the German tubes, these are astonishingly quiet. If you're seeking European ECC82/12AU7 tubes with ultra low noise look no further. These will get the job done fantastically.

Professional Tube Testing

This set was tested and certified by RoeTest V11 tester with the following result: 

Tube 1: 

Measured transconductance (GM): 12.09/14.07 mA/V  - 96%/113%  (100% = 12.50 mA/V)
Measured plate current (IA): 15.315/18.765 mA  - 102%/125%  (100% = 15 mA)

Tube 2:

Measured transconductance (GM): 14.55/12.38 mA/V  - 116%/99%  (100% = 12.50 mA/V)
Measured plate current (IA): 19.845/15.022 mA  - 132%/100%  (100% = 15 mA)

NO shorts, leakage or gas. NO noise or microphonics.

Curve trace is also included in the original RoeTest report.

Appearance & Cosmetic condition

Besides its wonderful sound characteristics, we treasure this pair also because its great cosmetic condition as well. The paint is still intact, including the Lorenz logo and PCC88 lettering. 

Packaging

This pair of tubes will be packaged in the Original Lorenz tube boxes.

Shipping Policy 
 - US Shipping: Flat-rate USPS Ground Advantage
 
 - International Shipping: (Please read carefully) USPS First Class International is used for all countries EXCEPT: Armenia, Chile, China, India, Latvia, Mauritius, Mexico, Serbia, Slovenia, Tuvalu, and Vietnam. If you prefer to use a different carrier or shipping service, please contact us first so we can establish shipping rates before you make payment. If you are a buyer in one of the excluded countries, you must contact us prior to purchase to arrange shipping. Soundlumia-sponsored 3-day guaranteed worldwide delivery program ($35 flat rate for ALL destinations in the world) via DHL Express is highly recommended. 
 - Same day shipping: Orders placed by 2:00PM US Pacific Time on weekdays are posted on the same day, otherwise the next business day. 
 - Combined shipping available - request invoice for total before making payment or receive shipping credit after order ships. 

Return Policy - Please READ carefully

Returns are acceptable if we made a mistake by delivering you wrong or defective products. Tubes we sell are guaranteed to work because we run professional tests and sound evaluation TWICE: before they are approved for listing AND before we ship them to customers. So the "defective item" case doesn't exist and please do not bother trying - this type of returns will NOT be accepted without proof that tubes are faulty and we will open disputes with eBay. Sound experience is very subjective and we do NOT accept returns because you do not like the tube's sound signature or because you changed your mind about your purchase. Please contact us to work things out before submitting return requests claiming "item is defective" or "item not as described" or "just didn't like it" or "changed my mind."

Tube rollers abusing the return system will be reported to eBay immediately and negative feedback will be left to your account - that's guaranteed. We have already opened several dispute cases to report abusive buyers and eBay has always ruled in our favor. International buyers who request return or refund claiming your country's import duties or sales taxes/VAT/GST are too high will be reported to eBay immediately for dishonesty and will be permanently blacklisted from purchasing from Soundlumia. We are committed to working closely with eBay to help rid the marketplace of dishonest, unjust, unreasonable, abusive buyers that are detrimental to the vintage tubes market and the audiophile community.