The all-new TAD 7025 / E83CC Redbase Highgrade is carefully selected for all the demanding gain stages in any guitar or headphone amp, tube microphones or the extremely sensitive phono preamp-positions in audio amplifiers. Tonally, this tube produces fine, airy, silky and pleasant highs, a complex and dense midrange with clarity and definition in the low end - providing maximum smoothness and zero microphonics. Great warm cleans and creamy overdrive.

Fine, unobtrusive highs, complex, dense mids and clear real bass. Selected for demanding applications for maximum smoothness and zero microphonics - even with very sensitive input stages of high-gain amplifiers. Ideally suited and our clear recommendation for the 1st gain stage of guitar amps, headphone amps, tube microphones and for the extremely sensitive phono preamp-stages of audio amplifiers.

In terms of sound, this TAD 7025 / E83CC Redbase stands for maximum transparency and depth definition and puts an end to musty or sappy highs. Airy, silky highs combined with tight but by no means overemphasized bass are the hallmarks of this 7025 Highgrade.

It supports the traditional Fender® tone and brings more liveliness and brilliance to an AC30®. Your Boogie® or Marshall® will benefit, too. The TAD 7025 / E83CC REDBASE® can replace any ECC83, E83CC, ECC803S, 12AX7, 12AX7A, 12AX7M, 12AX7WA/WB/WC/LPS/EH, 5751, 7025, CV492 and CV4004. Also replaces the MESA® SPAX7-A.

Q: When does a preamp tube become a Premium Selected tube?

A: All preamp tubes labeled Premium Selected have passed the following tests:

• Low Noise Test
• Microphonic Test
• Gain Test
• Sonic Tests
• Shock Tests
• Listening Tests
• Balanced Output Test