Mullard 6057 CV4004 Box Plates Matched Pair - Mitcham '57 - Same Code

Description: Soundlumia's OpinionNo other tubes can deliver vocals like the Blackburn Mullard's, and that's a fact. These ECC83's are extremely hard to find today and are becoming every serious audiophile's darling. Presented here are two lovely Blackburn valves with the old-style Mullard shield logo, which are even more special today. The overall tonality of Mullard ECC83 tubes is warm and lively with a very spacious sound stage. "Like a warm British jacket of the finest tweed, these glorious tubes have an attractive sweet warmth in their midrange and lower regions." This is how the experts on audiotubes.com describe the sound signature of British-made Mullard tubes. The top end is silky and pleasant and doesn't get rolled off. They retain a fine sense of "air" at the top, and the upper midrange is smooth and liquid. These tubes reproduce the human voice, especially female voices, with haunting realism. The British made Mullard tubes are also known to have an attractive sparkle at the top with rich bass...now we know where that "warm British jacket" comes from! Professional Tube Testing This set was tested and certified by RoeTest V11 Professional Tube Testing System with the following result: Tube 1: Measured transconductance(GM): 1.33/1.49 mA/V - 83%/93% (100% = 1.6 mA/V)Measured plate current(IA): 1.12/1.127 mA - 90%/90% (100% = 1.25 mA) Tube 2: Measured transconductance(GM): 1.44/1.3 mA/V - 90%/81% (100% = 1.6 mA/V)Measured plate current(IA): 1.075/0.797 mA - 86%/64% (100% = 1.25 mA) Curve trace is also included in the original RoeTest report. Appearance & Cosmetic condition Silkscreen: 98% - 100% (Immaculate) Date codes: 641 R7G (R = Mitcham, GB, 7 = 1957, G = July)641 R7G (R = Mitcham, GB, 7 = 1957, G = July) Packaging NEW reproduction Mullard tube boxes.Shipping Policy - US Shipping: Flat-rate USPS Ground Advantage (upgradable to flat-rate USPS Priority or FedEx 2nd Day for expedited delivery.) - International Shipping: Flat-rate USPS First Class International (upgradeable to flat-rate UPS Worldwide Expedited or DHL Express for expedited delivery.) Due to logistic issues with destination country's postal service, we are unable to ship to the following countries using USPS First Class: Armenia, Chile, China, India, Latvia, Mauritius, Mexico, Serbia, Slovenia, Tuvalu. If you are a buyer from one of these countries, you must contact us to arrange shipping prior to purchase. - 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 carefullyReturns 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 tax/GST/VAT 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.

Price: 443.75 USD

Location: Torrance, California

End Time: 2024-12-14T08:29:34.000Z

Shipping Cost: 5.5 USD