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TAD

New Matched Quad (4) TAD 7025 / E83CC-Cz / 12AX7 High Grade Vacuum Tubes

(1 review) Write a Review
SKU:
NP231-4
UPC:
609722131346
MPN:
E83CC-Cz
Shipping:
Calculated at Checkout
$139.18

Description

New Gain Matched Quad of Tube Amp Doctor 7025 / E83CC-Cz (12AX7 / ECC83) Highgrade Vacuum Tubes

A specially selected tube for the emphasis of warm tones, lows, mids, overdrive and even highs. The A-Frame construction makes this an exceptionally low noise tubes, perfect for high gain applications.

Tested & screened for the following by TAD & double checked and/or matched by us. This tube was specially selected as high grade by TAD.

-      Low Noise Test

-      Microphonic Test

-      Gain Test

-      Sonic Tests

-      Shock Tests

-      Listening Tests

-      Balanced Output Test

Will work in place of: 12AX7, ECC83, 12AX7A, 7025, ECC803S, 7025, 12AX7WA

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

  • 5
    5 Star Premium Tubes

    Posted by Ray on 12th Mar 2024

    About 3 weeks ago I bought a brand new 68" Fender Deluxe Reverb Reissue amp. My fears about the so-called premium selected Groove Tubes that Fender puts in their amps came true...a major letdown! I understand that there are just a few factories that make tubes. If you're gonna rebrand the tubes make sure they're at least at a base level of good. The GT tubes had a flat low end with a decent high end. Trying to find a sweet spot with the Groove Tubes that came in my amp was a bit of headache to say the least. I knew how to fix the problem. VIVATUBES.COM! I saw that you were selling TAD preamp tubes. The first thing I said to myself was "AWESOME"! TAD have a great reputation of selecting the cream of the crop tubes! These 7025/12AX7'S are absolutely legit! Warm with full blissful tone with plenty of high end to spare. The tonal range is wide. Sidenote: The Fender Deluxe Reverb doesn't have a middle control knob. These TAD tubes gave me great mids! You'll get great cleans from these tubes as well! They really do check off all the boxes in what you would want from your preamp section! I trust TAD's just like I trust Mullard's! These TAD's are 100 percent 5 Star Premium Tubes!

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