Important Note - Please READ

This item is eligible for Soundlumia-sponsored guaranteed 3-day worldwide delivery at special flat rates. 

US shipping: $15 for ALL states via FedEx Express/UPS 3-Day
International shipping: $30 for ALL countries via DHL Express Worldwide 

We are committed to safe, expedited and guaranteed delivery of high-value items to serious and committed customers, wherever they are in the world. NO other shipping options are offered for this item. Please refer to Shipping Policy or contact us for details.

Product Summary

The top five sound qualities shared by German tubes are delivered with perfection by this lovely Valvo Hamburg tube, with further enhancements thanks to the ultra rare 45° foil D getter:

1) Holographic sound stage (leading brand: Telefunken) 
2) Non-fatiguing top end extension (leading brand: Siemens) 
3) Natural tone/flat midrange (leading brand:  Valvo Hamburg)
4) Deeply controlled bass  (leading brands: Valvo Hamburg & Siemens)
5) Ultra clarity and layered details (leading brand: Telefunken)

Sound Characteristics 

Over the years, we have found the bass on Valvo Hamburg even more appealing than on Siemens (allegedly the King of Bass and that's fine) for a very important reason: there's added substance and weight to the lower midrange that makes the bass more pronounced without being overpowering. This special sound characteristic can only be found on Valvo Hamburg tubes. And because of the added substance in sound, the overall tonality of these tubes feels sweet, warm and musical, and the ambient clues sound closer to your ears. One may find Telefunken's midrange thinner compared to Valvo Hamburg as a trade-off of a more enveloping and curvier holographical sound stage...the law of physics applies here as well - the shape of sound can only change in one direction. 

Professional Sound Evaluation

The pair worked wonderfully and sounded terrific in our professional studio setup for monitoring. 

 - Input: Cambridge Audio CXC V2 dedicated CD transport + Schiit Audio Bifrost 2 Multibit DAC
 - Amplification: Woo Audio WA7 Fireflies (3rd gen) Balanced Headphone Amplifier
 - Output: Focal Clear MG Pro open-back headphones

Our full tube sound review was written 100% based on the actual listening experience while this pair of tubes were running in the system described above.

Professional testing & sound evaluation

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

Tube 1: 

Measured transconductance (GM): 2.44/2.53 mA/V  - 111%/115%  (100% = 2.20 mA/V)
Measured plate current (IA): 11.68/12.482 mA  - 111%/119%  (100% = 10.50 mA)

Tube 2:

Measured transconductance (GM): 2.47/2.46 mA/V  - 112%/112% (100% = 2.20 mA/V)
Measured plate current (IA): 12.122/12.49 mA  - 115%/119%  (100% = 10.50 mA)

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

Curve trace is also included in the original RoeTest report.

Appearance & cosmetic condition

Besides the world-class sound characteristics, we treasure this pair also because the excellent condition of inscriptions on the tubes given its age. The identical 3-letter (Pre-1961 Hamburg date code is 100% visible on both tubes: 

K62 D6J (k62 = ECC82 Production gen #2, D = Hamburg, Germany, 6 = 1956, J = October)
K62 D6K (k62 = ECC82 Production gen #2, D = Hamburg, Germany, 6 = 1956, K = November)

Packaging

New reproduction Valvo tube boxes.

Shipping Policy 
- This item is eligible for Soundlumia-sponsored guaranteed 3-day worldwide delivery at special flat rates.

   US shipping: $15 for ALL states via FedEx Express
   International shipping: $30 for ALL countries via DHL Express Worldwide 

- Declared value for ALL international customers will be accurate and correct. Formal invoice from Soundlumia showing FULL purchase amount will be provided as customs documents, attached to the DHL package.

- 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 your 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.