Vacuum Tube - EL84S-STR Blackplate, TAD, Premium Selected

Vacuum Tube - EL84S-STR Blackplate, TAD, Premium Selected

Tube Amp Doctor (TAD)
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Starting at: $23.40
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The Tube Amp Doctor Blackplate series offers the highest tube performance due to the stable heat dissipation of the black anode. This results in an increased tube-life and tones that rival the classic NOS tubes. The EL84S-STR offers rich sounding breakup with its warm and pleasant mid tones. These tubes are matched for both plate current and transconductance. The EL84S-STR pass all of the tests of the TAD Premium Selection process. The TAD EL84S-STR can be used in any standard EL84, 6BQ5, 6P14P, or N709 position.

Note: The TAD EL84S-STR has a 22.5mm diameter and does not fit into older Marshall DSL401 and UK made VOX AC15 TBX amplifiers. Please check your amp before ordering.

TAD Blackplate Features

  • Very detailed and defined tone
  • Natural and relaxed sound characteristics
  • Lively portrayal of voices
  • Perfect for complex and three-dimensional sounds
  • Consistent thermal operation
  • Long tube-life because of stable heat dissipation

TAD Premium Selection Tests Performed

  • Plate Current (PC) and Amplification (TC)
  • Low Noise Test
  • Microphonic Test
  • Sonic Tests
  • Shock Tests
  • Listening Tests
  • Shorts & Leakage Tests
RoHS Compliant
Item ID:
Tube Amp Doctor (TAD)
Part Numbers
Single or MatchedOur Part NumberUPC/EANTube Amp Doctor Part Number
SingleT-EL84S-STR-TAD841358112225 RT771
Matched PairT-EL84S-STR-TAD-MP
Matched QuadT-EL84S-STR-TAD-MQ
Product Measurements by Type
Body Height71mm
Packaging Information
Packaging DimensionsMatched Pair versionT-EL84S-STR-TAD-MP2 in. × 8 in. × 4.6 in.
Matched Quad versionT-EL84S-STR-TAD-MQ2 in. × 8 in. × 4.6 in.
Single versionT-EL84S-STR-TAD3.25 in. × 1 in. × 1 in.
Weight (Packaging)Matched Pair versionT-EL84S-STR-TAD-MP0.098 lbs.
Matched Quad versionT-EL84S-STR-TAD-MQ0.196 lbs.
Single versionT-EL84S-STR-TAD0.049 lbs.
Product Measurements by Item
T-EL84S-STR-TAD - Single versionBody Height71mm
T-EL84S-STR-TAD-MP - Matched Pair versionBody Height71mm
T-EL84S-STR-TAD-MQ - Matched Quad versionBody Height71mm

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Product Reviews

5.00 out of 5 based on 1 reviews
- December 13th, 2020
5 out of 5

These are very nice sounding tubes