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Telefunken

New Matched Pair (2) Telefunken Black Diamond 12AX7 / ECC83-TK Gold Pins Vacuum Tubes

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SKU:
NP180-2
UPC:
899051002497
MPN:
12AX7
Shipping:
Calculated at Checkout
$127.92

Description

New Factory Matched Pair of Telefunken Black Diamond ECC83-TK (12AX7) Vacuum Tubes

A well-balanced tube suited for all types of music and playing styles. Designed to allow for cleaner headroom than higher gain 12AX7s when pushed into overdrive, it offers distortion with strongly defined lows, a rich mid range, and clean / smooth highs. Gold clad pins.

Will work in place of: 12AX7, ECC83, 12AX7A, 7025, CV4004, ECC803S

Testing and/or Matching

At VIVA TUBES, all of our customers get the same high standard of testing and matching. Some sellers charge more for premium matches but we believe all of our customers should get the same level of quality and service. 

Tubes are tested and/or matched at full operating voltage with regulated power supply on a Maxi Matcher tester for general mutual transconductance (Gm). In addition, power tubes are tested/matched by plate current (Ip) and preamp tubes are tested/matched by gain. Rectifier tubes will be tested for emissions on a calibrated military grade tube tester. 

Our goal is to match within 5% with an upper limit of 15% (15% is the industry limit to consider a set).

Hand written test data included.

Note that we do offer a few models which are tested & matched at the factory. They will be matched by the same parameters (Ip & Gm) but to the manufacturer's standards. Factory testing will be indicated in the item title and description. 

Guarantee

We offer a minimum 90 day guarantee covering functional defects - including noise unless otherwise stated. The guarantee period begins the day you receive your order.

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1 Review

  • 4
    Telefunken Black Diamond 12xA7's

    Posted by Jay Casper on 9th Oct 2022

    Just recieved a pair of these tubes. They are being used as the input/gain tubes in my Rouge M180's. These tubes sounded great right out of the box. They are clear, detailed and present a very good soundstage. Bass is tight and they have just the right amount of warmth. Never had a brand new set of tubes sound this good. I will comment again when they have some more hours on them. Very pleased with this tube.

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