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Tube Amp Doctor - 12BH7A-STR Premium (Balanced) - Preamplifier Tube

Why Pay Full Price? Why Pay Full Price?
Original price $99.00
Original price $99.00 - Original price $99.00
Original price $99.00
Current price $89.00
$89.00 - $89.00
Current price $89.00
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Immerse yourself in sonic perfection with the Tube Amp Doctor - 12BH7A-STR Premium (Balanced) - Preamplifier Tube. Boasting a fusion of the best elements of the NOS RCA black plate and the GE version, this gem sets a new benchmark in the world of sound. Get ready for reliable performance and a tonal quality that exudes sophistication and depth. From the first note, you'll experience the enhanced balance and stunning clarity that the TAD 12BH7A-STR is renowned for making it the first preference for high-end applications such as the Ampeg SVT´s and the Blackstar HT-5. Rigorously tested for low noise, microphonics, gain, shock, and balanced output, this preamp tube guarantees a sonic experience like no other. So, elevate your sound to new heights with the perfect blend of mechanical performance and sonic richness. Once you’ve heard this kind of clarity, there’s simply no going back.

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ℹ Product Information

Tube Amp Doctor - 12BH7A-STR Premium (Balanced) - Preamplifier Tube

Welcome music connoisseurs and sound enthusiasts to one of the most elegant, powerful, and reliable preamplifier tubes in the industry: the Tube Amp Doctor - 12BH7A-STR Premium (Balanced). This audio titan hails from the prestigious lineage of NOS RCA black plate, renowned for its legendary reliability and unparalleled tonal quality.

For those seeking the sweet-spot convergence of vintage and modern tones, it doesn’t get better than this as our latest offering uniquely combines the alluring sonic charisma of these timeless classics with the technological prowess of the GE version. Hailed as the top choice for high-end applications, the TAD 12BH7A-STR breathes new life into your Ampeg SVT´s and Blackstar HT-5 with its balanced selection, offering a refreshing yet robust audio experience like never before.

How do we ensure its title as a Premium Selected tube? Every single unit undergoes meticulous tests for low noise, microphonics, gain, sonic, shock, listening, and balanced outputs, with a distinctive focus on matching pairs to ensure identical gain and characteristically identical systems – the essential alchemy for high fidelity sound systems. Every TAD Premium Selected tube is RohS Compliant and backed by six months warranty, underscoring our confidence in its quality and durability.

The immaculate electrical specifications allow for unparalleled emissive potential, ensuring vibration-free audio even during the dynamic crescendos. Housed in a sleek, yet robust small button 9-pin base it stands at an elegant 73mm with cooling facilitated through conventional methods. It’s not just a tube amp; it’s a ticket to an acoustical adventure with every note resonating with unwavering clarity and warmth.

Features & Benefits:

  1. BALANCED AND SELECTED FOR QUALITY: Each TAD 12BH7A-STR is carefully balanced and selected to deliver unprecedented quality and reliability. With identical gain and characteristic systems, the tube ensures a harmonious blend of sound for high-end applications.

  2. PREMIUM SELECTED: Every TAD Premium Selected preamp tube has undergone an array of stringent tests, such as Low Noise, Microphonic, Gain, Sonic, and Shock tests. Listening tests and Balanced Output tests are also performed to ensure unmatched audio performance.

  3. LEGENDARY TONAL QUALITY: Taking inspiration from the NOS RCA black plate line, the TAD 12BH7A-STR offers a perfect fusion of vintage and modern tones. This is achieved through its exemplary tonal capabilities, making it the go-to choice for legendary sound.

  4. OPTIMAL MECHANICAL PERFORMANCE: Housed in a compact yet robust E9-1, small button 9-pin base, each tube amp exudes excellence that goes beyond its sonic performance. With efficient cooling through conventional methods, it ensures a consistent and steady performance, even during intense audio sessions.

  5. GUARANTEED RELIABILITY WITH WARRANTY: All TAD Premium Selected/Highgrade tubes come with a six-month warranty period, guaranteeing unquestionable reliability, safety, and compliance to high-quality standards.

  6. EFFICIENT HEATING: The TAD 12BH7A-STR embraces the finest technical features including an efficient heating system. Providing a balanced cathode-to-heater potential, it allows for unaltered sound reproduction that does justice to your favorite tunes.

  7. COMPACT SIZE: With a height of 73mm and a net weight of approximately 16g, this lightweight and small-sized tube takes up minimal space, making it easily installable in any setting.

  8. MAXIMUM RATINGS AND TYPICAL OPERATION: With a maximum DC plate voltage of 330V and Negative DC grid voltage of -50V, each TAD 12BH7A-STR demonstrates the finest electrical specifications, leading to consistent and unrivaled audio performance.

  9. RICH AND CLARITY FILLED SOUND: Those seeking an acoustical adventure will be pleased with the TAD 12BH7A-STR's ability to produce clear, warm, and rich sound. Every note will resonate with pristine clarity, transforming your listening experience.

  10. ROHS COMPLIANT: All TAD Premium Selected tubes are RoHS Compliant, which signifies our commitment to environmental protection and safety.

  11. HIGH-FIDELITY CYMBALS: When combined with the right audio system, the TAD 12BH7A-STR is capable of producing high-fidelity sound with an excellent dynamic range, from soothing soundscape to vibrant crescendo.

Specifications Details
Plate Voltage (Max) 330V
Electrical Heater Voltage 12.6V +/- 1.0 (Series), 6.3 +/- 0.5 (Parallel)
Current 0.3(Series), 0.6 (Parallel)
Heating Indirect
Cathode-to-heater potential, max 100V
Direct interelectrode capacitances, max Grid to plate - 2.5pF, Grid to cathode - 2.9pF, Grid to heater - 2.9pF, Plate to cathode - 0.5pF
Balanced systems rating 5%
Operating Position Any
Base E9-1, small button 9-pin
Dimensions 73mm(height), 66mm(seated height), 22.5mm(diameter)
Cooling Method Conventional
Net Weight Approx. 16g
AF Power Amplifier Maximum Ratings DC plate voltage - 330V, DC plate voltage on vertical deflection amplifier - 500V, Positive DC grid voltage - 0V, Negative DC grid voltage - -50V, DC cathode current - 20mA, Plate dissipation - 3.5W
Resistor Gold circuit resistor Fixed bias - 250 kila ohms, Cathode Bias - 1 Mega Ohm
Typical Operation Class A Amplifier DC plate voltage - 250V, Grid voltage - -10.5V, Amplification factor - Approx. 17, Plate resistance - approx. 5.4k, Transconductance - Approx. 3100mS, Plate current - approx. 11mA
Compliance RohS Compliant

In the final analysis, the Tube Amp Doctor - 12BH7A-STR Premium (Balanced) - Preamplifier Tube stands as a testament to the audio-smithing excellence we strive for at The Audio Tailor. It is a sophisticated fusion of classical character and contemporary perfection — a tour de force of sound refinement. Let the 12BH7A-STR breathe a new vitality into your sound, transforming ordinary audio into an extraordinary sonic spectacle. This tube goes above and beyond typical expectations, making it far more than an accessory - it becomes an integral component of your high fidelity journey, turning each listening session into an unforgettable, immersive experience. Walk into the realm of superior sound quality and richness today. Contact us on 1300 308 711, write to us at sales@theaudiotailor.com.au, or drop by our Brisbane store at Unit 9/20 Rivergate Place, Murarrie QLD 4172 to take the first step towards sound nirvana. Beyond question, the Tube Amp Doctor - 12BH7A-STR will amplify your passion for music to greater heights. Trust in the Tube Amp Doctor - 12BH7A-STR. Trust in The Audio Tailor. Let us bring your audio dreams to life.

ℹ Specifications
Specifications Details
Plate Voltage (Max) 330V
Electrical Heater Voltage 12.6V +/- 1.0 (Series), 6.3 +/- 0.5 (Parallel)
Current 0.3(Series), 0.6 (Parallel)
Heating Indirect
Cathode-to-heater potential, max 100V
Direct interelectrode capacitances, max Grid to plate - 2.5pF, Grid to cathode - 2.9pF, Grid to heater - 2.9pF, Plate to cathode - 0.5pF
Balanced systems rating 5%
Operating Position Any
Base E9-1, small button 9-pin
Dimensions 73mm(height), 66mm(seated height), 22.5mm(diameter)
Cooling Method Conventional
Net Weight Approx. 16g
AF Power Amplifier Maximum Ratings DC plate voltage - 330V, DC plate voltage on vertical deflection amplifier - 500V, Positive DC grid voltage - 0V, Negative DC grid voltage - -50V, DC cathode current - 20mA, Plate dissipation - 3.5W
Resistor Gold circuit resistor Fixed bias - 250 kila ohms, Cathode Bias - 1 Mega Ohm
Typical Operation Class A Amplifier DC plate voltage - 250V, Grid voltage - -10.5V, Amplification factor - Approx. 17, Plate resistance - approx. 5.4k, Transconductance - Approx. 3100mS, Plate current - approx. 11mA
Compliance RohS Compliant
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