The Audio Tailor Reviews
Call Us 1300 308 711
Hot
New
Promotion
In stock
Call for Stock

Tube Amp Doctor - 7025WA Highgrade - Preamplifier Tube

SKU: RT080

$79.00$69.00

You Save: $10.00

Buy Now. Fast Delivery or Store Pickup
Trusted by 40,000+ Customers in Australia
We love helping our customers create amazing experiences
Hi Fi Reviews

Speak to a Tube Amp Doctor Expert In Store

Call 1300 308 711.

Get Brisbane Store Directions.

Trusted by 40,000+ Customers


Service you can trust

Official Australian Dealer


Official Australian Warranty

Great Prices & Deals


Found a better price? Call us.

5-Star Customer Service


Industry experts ready to help

PRODUCT INFORMATION
CUSTOMER REVIEWS
PRODUCT INFORMATION

Delivers full gain with smooth top end - low noise

The TAD 7025 WA delivers full gain with smooth top end. No microphony issues even with the most sensitive preamps. The 7025 WA supports a fat midrange and creates a bold tone with lots of harmonics. Played clean, the TAD 7025 WA delivers a warm liquid tone which is very responsive to dynamic playing. Overdriven, the 7025 WA provides lots of sustain with well defined mid-range punch.

  • recommended choice for most demanding guitar amp input/V1 stages
  • extremly low microphony selected for most sensitive applications
  • smooth top end
  • full gain
  • fat mid range
  • tight low end
  • outstanding low microphony
  • low noise
  • balanced systems
  • triple mica construction
  • replaces: 12AX7, 12AX7A/WA/WB/WC, ECC83, 7025, SPAX7-A

 

We recommend the RT080 TAD 7025WA as Inputtube for guitaramplifiers like Diezel ("Pit Spezial"), Blackstar, Brunetti, ENGL, Fender, Marshall, Mese Boogie, Orange etc.

The TAD HIGHGRADE Selection is especially recommended for use with demanding input stages (V1) and for all applications demanding the best selection for extremely low microphony 7025 / ECC83 / 12AX7A type tubes.

For regular applications the RT008 TAD ECC83 WA Selected can be used with the same sound and gain structure.

 

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

 

HIGHGRADE SELECTION - But only those tubes which pass these tests best are labeled Highgrades.

Matching and Selecting Options for Preamp Tubes

Matching in Pairs for preamp tubes means that two tubes show identical gain, hence, four characteristically identical systems.

This matching method includes our Balance-Selection. We highly recommend this matching method for hi-fi systems.

 

TAD Premium Selected/Highgrade tubes are guaranteed for a period of 6 months (according to terms of warranties) for the quality criteria mentioned above.

RohS Compliant

 

Specifications:

Electrical

Heater

  • Voltage (AC or DC) - 12.6V +/- 1.0 (Series), 6.3 +/- 0.5 (Parallel)
  • Current - 0.15(Series), 0.3 (Parallel)

Heating - Indirect

Cathode-to-heater potential, max - 150V

Direct interelectrode capacitances, max***

  • Grid to plate - 1.8pF
  • Grid to cathode - 2.0pF
  • Grid to heater - 2.0pF
  • Plate to cathode - 2.1pF

Mechanical

  • Operating position - Any
  • Base - E9-1, small buton 9-pin
  • Dimensions - 58mm(height), 51mm(seated height), 22.5mm(diameter)
  • Cooling - Conventional
  • Approximate net weight - 13g

AF Power Amplifier

Maximum Ratings

  • DC plate voltage - 330V
  • Positive DC grid voltage - 0V
  • Negative DC grid voltage - -55V
  • DC cathode current - 8mA
  • Plate dissipation - 1.2W
  • Bulb temperature (surface hottest point) - 160 degrees celcius
CUSTOMER REVIEWS