Preferred Series TubesPreferred Series tubes combine the best of everything that thetubestore.com has to offer. All of our years of experience in testing, rating, listening, and customer knowledge are brought together for the best tube value we can provide. These are tubes that consistently provide us with the most positive customer feedback, have the best build quality, and which we subject to our most exhaustive testing yet. Only a few tubes will be part of the Preferred Series. Here's how a tube qualifies: Preferred Series tubes are a guaranteed upgrade to your sound. These are tube lines not seen in original equipment. Warranty: All Preferred Series tubes carry a 6 month extended warranty.
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| We have 4 Preferred Series Tubes in stock right now. | |||
| Lowest Price to Highest | A to Z | |
| 23.95 | Preferred Series 7025 | Preferred Series 274B / 5U4G | |
| 27.95 | Preferred Series 274B / 5U4G | Preferred Series 7025 | |
| 49.95 | Preferred Series 7189 (Premium EL84) | Preferred Series 7189 (Premium EL84) | |
| 99.95 | Preferred Series KT88 | Preferred Series KT88 | |
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| The Preferred Series 274B tube is a full-wave rectifier that is very similar to the classic 5U4G. This 274B tube's filament draws 2.5A of current. This current draw makes it acceptable for many amps originally designed for a 5AR4/GZ34 tube. Our PS-274B tube is a beautiful large coke bottle shaped rectifier tube with large black plates. Space may be an issued in some amps so be sure to check this. This tube is produced for us in China by the Shuguang factory. A new evacuator is utilized for a much longer time period increasing vacuum over 100 times more than their current 5U4G tube. A new cathode coating process provides a much smoother finish improving electron flow and they are burned in at high voltages for a...more Availability: Usually ships within 24 hours. |
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| The Preferred Series 7025 is a high quality 12AX7 tube type. This tube is a reproduction of the highly regarded and sought after Mullards from the 1960s. This high quality 7025 is very rugged. The plates are manufactured out of a premium metal imported from Germany and supported with extra thick mica spacers to insure against microphonics. They are burned in and tested at the factory and then again on our digital high voltage equipment to make sure the tubes selected for you will provide outstanding tone and performance. From a review: "A great sounding 12AX7 tube type that reminds me a little more of the ECC83 that EI made in the old days. That's a pretty nice compliment. I compared this tube against...more Availability: Usually ships within 24 hours. Quantity pricing: Order 5 tubes and save $10.00. |
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| Our Preferred Series 7189 tube is a versatile option for EL84, 6BQ5, and 7189 tube circuits because of its clean headroom, power, dynamics and harmonic content. This 7189 tube is rated for higher power and plate voltage making it our pick for amps with tough operating conditions. For the hifi crowd, this tube is the perfect choice for Scott, Eico and Fisher amps. This 7189 tube is rated for higher power and plate voltage plus longer life making it a premium upgrade for amps with tough operating conditions. The solid construction and heavy glass also...more Availability: Usually ships within 24 hours. |
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| Our Preferred Series KT88 tube is a versatile high quality tube. It is very musical and with a frequency range balanced from top to bottom. It has a strong detailed bass and smooth highs, with the mids slightly warm yet still detailed. The soundstage is wide and deep. Availability: Usually ships within 24 hours. |
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