double triodes: 12AU7A, ECC 82, 6189W Tung-Sol, JAN-5814A GE, 5963, B329, 13D8, CV4003, M8136, B749 Genalex, E82CC, ECC802s Telefunken
Noval B9A 9-Pin Gold Plated tube-valve-base-RöhrensockelThe best performing 6189W-E82CC-ECC802s from current ProductionIt is extra handselected for low noise, low hum, low leakage, low THDIt puts out the best Audio performance with most possible detailsS4A ® "Selected For Audio" is a registered Trademark by BTBheight:55 mm - bulb diameter: 22 mm (info can variy!)ECC 82-ECC 802
Delivery time: ca. 1 - 5 days
ECC82JJ Red Label 12AU7 JJ audio preamp tube HiFiJJ dual triode box plate design for audio equipmentUsed in Audio Note Cayin Line Magnetic Fezz Audio amplifiersNoval B9A heater 6.3V 300mA µ17 gm~2.2mA/V Ø22x52mm glass
Delivery time: ca. 1 - 5 days
JJ ECC82/12AU7 audio dual triode, B9A, 6.3/12.6 V heater supplyTwo V1 valves selected for low noise, low hum and low microphony useFor line, buffer, driver, cathode-follower and phase-inverter useOptional matched/balanced grading suits stereo and balanced stages
Delivery time: ca. 1 - 5 days
Noval B9A 9-Pin tube-valve-base h:56mm - d:21mmThe Premium 12AU7 for all Audio and Studio ApplicationsIt is extra handselected for low noise, low hum, low leakageThe tube puts no extra sound to the device - it sounds very neutral
Delivery time: ca. 1 - 5 days
ECC82 Genalex Gold Lion 12AU7 reference audio tubePremium dual triode for hi fi amplifiersPopular in PrimaLuna Cary Audio Line Magnetic gearNoval Gold Pin B9A heater 6.3V 300mA µ17 gm~2.2mA/V Ø22x55mm
Delivery time: ca. 1 - 5 days
Noval B9A 9-Pin tube valve base RöhrensockelThis 12BH7 is the best choice for standard and phase splitter positionsIt is extra handselected for low microphony, low noise and low humThe tube is designed and made in EuropeS4GB ® "Selected For Guitar & Basses" is a registered Trademark by BTBheight:65mm - bulb diameter:22mm (info can vary!)12BH7-A Premium tube Röhre
Delivery time: ca. 1 - 5 days
Genalex Gold Lion ECC82/B749 dual triode, B9A, 6.3/12.6 V heaterTwo gold-pin valves V1-selected for low noise, hum and microphonyFor line stages, drivers, buffers and compatible phase-inverter useOptional matched/balanced grading aligns all four triode sections
Delivery time: ca. 1 - 5 days
Noval B9A 9-Pin tube-valve-baseThis 12AU7 is the best choice for standard and phase splitter positionsIt is extra handselected for low microphony, low noise and low humheight:57mm - bulb diameter:22mm
Delivery time: ca. 1 - 5 days
E 82 CC RSD - E82 CC RSD - E82 CCRSD - E82 CCRSD - E82CCRSDNoval B9A 9-Pin tube-valve-base-Röhrensockel=12AU7W-6189W longlife tube with Telefunken ribbed Plate Anode Stylevintage, tight sounding Audio High End Type, made in Europeoption balanced is ideal for driver, SRPP and Audio ApplicationsRSD ® is a registered Trademark by BTB
Delivery time: ca. 1 - 5 days
Noval B9A 9-Pin tube-valve-basehigh quality Audio tube, smooth, tight soundHeight:48mm - bulb diameter:22mm
Delivery time: ca. 1 - 5 days
E 82 CC RSD - E82 CC RSD - E82 CCRSD - E82 CCRSD - E82CCRSDNoval B9A 9-Pin tube-valve-base-Röhrensockel=12AU7W-6189W longlife tube with Telefunken ribbed Plate Anode Stylevintage, tight sounding Audio High End Type made in Europeoption balanced is ideal for driver, SRPP and Audio ApplicationsSet of 2 pcs selected for low microfony, low hum, low noise (V1 use)RSD ® is a registered Trademark by BTB
Delivery time: ca. 1 - 5 days
Noval B9A 9-Pin tube-valve-base h:48mm - d:22mmhigh quality Audio tube, smooth, tight soundSet of 2 pcs selected for low microfony, low hum, low noise (V1 use)Option matched/balanced for symmetrical, phase inverter or SRPP circuits
Delivery time: ca. 1 - 5 days
12AU7EH Electro Harmonix ECC82 preamp driver tube audio ampMedium gain dual triode for HiFi preamps drivers phase inverterLinear response low noise stable musical performanceNoval B9A heater 6.3V 300mA or 12.6V 150mA size Ø22.5x52mm
Delivery time: ca. 1 - 5 days
12AU7EH Electro Harmonix ECC82 matched pair V1 low noise BTBSelected low noise low microphony low hum for sensitive V1Ideal for phono preamps HiFi line stages guitar bass combosNoval B9A heater 6.3V 300mA or 12.6V 150mA size Ø22.5x52mm
Delivery time: ca. 1 - 5 days
Noval No15 B9A 9-Pin tube-valve-base-RöhrensockelECC 82 RFT-WF-Funkwerk-Erfurt-Mühlhausen DDR tubeRöhren haben möglicherweise den roten Welter Stempel
Delivery time: ca. 1 - 5 days
Noval Goldpin B9A 9-Pin tube-valve-baseHigh Quality tube - close to old ECC802s like Tesla or Telefunkenvery clear, round, true sound - good for recording Applicationsheight:56 mm - bulb diameter:21 mm
Delivery time: ca. 1 - 5 days
Noval Goldpin B9A 9-Pin tube-valve-base h:56mm - d:21mmvery clear, round, true sound - good for Audio/Studio ApplicationsSet of 2 pcs selected for low microfony, low hum, low noise (V1 use)Option matched/balanced for symmetrical, phase inverter or SRPP circuits
Delivery time: ca. 1 - 5 days
Noval B9A 9-Pin tube-valve-base h:48mm - d:22mmfast settling, dynamic (not nervous) sounding Typeoption matched/balanced is ideal for driver, SRPP and Audio ApplicationsRSD ® is a registered Trademark by BTB made in Germany
Delivery time: ca. 1 - 5 days
Noval Goldpin B9A 9-Pin tube-valve-baseArt-series High End Audio Tube, very clear and open soundingHeight:46mm - bulb diameter:22mm
Delivery time: ca. 1 - 3 days
Noval Goldpin B9A 9-Pin tube-valve-baseHigh End Audio Tube, very clear and staright tube soundingSet of 2 pcs factory selected 12AU7-S = ECC82-S tubesHeight:46mm - bulb diameter:22mm
Delivery time: ca. 4 - 8 weeks
Noval B9A 9-Pin tube-valve-baseHigh Quality tube - close to old ECC802s like Tesla or Telefunkenvery clear, round, true sound - good for Audio and Studio Applicationsheight:57mm - bulb diameter:22mm
Delivery time: ca. 1 - 5 days
Noval B9A 9-Pin tube-valve-base h:57mm - d:22mmvery clear, round, true sound - good for Audio and Studio ApplicationsSet of 2 pcs selected for low microfony, low hum, low noise (V1 use)option matched/balanced for symmetrical, phase inverter or SRPP circuits
Delivery time: ca. 1 - 5 days
Noval B9A 9-Pin tube-valve-base-RöhrensockelThe ECC82 Tesla is the predecessor tube of the ECC82JJIts tone is warm and nice to hear, good for long time listenersIt has a good quality and it is reliable.also good to use in Bass guitar amplifiers such as the Ampeg SVT
Delivery time: ca. 1 - 5 days
ECC82JJ Gold Pin 12AU7 JJ audio preamp tube HiFiGold plated pins JJ box plate dual triode audio tubePopular in PrimaLuna Octave Ayon Leben tube amplifiersNoval Gold Pin B9A heater 6.3V 300mA µ17 gm~2.2mA/V Ø22x52
Delivery time: ca. 1 - 5 days
Preamp Tubes & Dual Triodes ECC82 / 12AU7A – Selection, Grading, and Replacement (Noval Base)
What are ECC82 = 12AU7 dual triodes and what are they used for?
ECC82 and 12AU7 (including 12AU7A) are small-signal dual triodes on the Noval (9-pin) base, mainly used as drivers, buffers, phase splitters, or in line stages. Compared with very high-gain preamp tubes such as the ECC83, they are typically designed for more moderate gain and higher current capability per section.
In guitar amplifiers, ECC82 / 12AU7 is often found in reverb driver circuits, effects loops, or as a phase inverter in certain designs; in hi-fi and studio equipment it is even more common in line preamps, output buffers, driver stages, and sometimes headphone amplifiers. For technicians and service shops, clear classification matters: many variants are plug-in compatible, but not every “similar” designation is automatically a direct 1:1 replacement.
How do ECC82, 12AU7A, 5814A, and 6189/6189W differ?
ECC82 and 12AU7A refer to the same basic tube under European versus US naming conventions; in practice, 12AU7A is usually directly compatible with 12AU7 and is typically a manufacturer revision or a version with slightly different additional properties. 5814A and 6189 (or 6189W) are ruggedized, military-style variants from the same family that—depending on specification—may target minimum lifetime, defined electrical limits, and improved resistance to shock and vibration.
The “W” suffix, as also seen in parts of the 12AX7 and 12AU7 groups, is commonly used to indicate a ruggedized version. These types can be advantageous in modern mobile use cases such as guitar and bass amps. Because of that, variants like 5814A or 6189W are often used as robust alternatives within the ECC82/12AU7 family, but they are becoming rarer and more expensive; in many cases, current selected S4A versions or modern 12AU7W types (e.g., Tung-Sol) are the more practical choice.
Which tubes are interchangeable—and where are the exceptions?
“Interchangeable” here means the same base type, suitable heater requirements, and sufficiently similar characteristics so reliable operation is possible without circuit changes. For ECC82 / 12AU7 there is often a high degree of interchangeability within the family, but certain special types can have different specifications or pin-compatible peculiarities.
In practice, 12AU7 and ECC82 are 1:1 compatible. JAN 5814A, 6189W Tung-Sol, CV4003, and M8136 are also commonly used as compatible members of this family, as are long-life, tight-spec variants such as E82CC and ECC802s. Designations like 5963, B329, 13D8, or B749 Genalex can also appear close to the ECC82 family depending on documentation and intended use, but especially with rare or specification-driven tubes you should verify circuit position, absolute ratings, and heater/operating data before substituting. This is particularly important when the tube is used as a loaded driver stage or when defined symmetry (e.g., in a phase inverter) is required.
Also worth noting are the compatible but rare E180CC and the 5963. Both are computer tubes that were not originally designed for audio use. Sometimes the stronger E80CC or ECC99 is used as an “upgrade”, but manufacturer approval should be requested before use. We do not recommend using ECC83/12AX7 or ECC81/12AT7 in an ECC82/12AU7 position because their transfer characteristics are too different.
How do I choose the right ECC82 / 12AU7 for a guitar amp, hi-fi, or studio device?
The technically correct tube is the one that matches the circuit task and runs quietly, stably, and repeatably in real operation. Key criteria are noise floor, microphonics, section symmetry (for dual triodes), permissible voltages, and mechanical robustness.
For guitar players, it often matters whether an ECC82/12AU7 works reliably as a reverb or driver tube and is resistant to microphonics (S4GB). Hi-fi and studio users focus more on very low noise, linear behavior (S4A), and optional channel consistency—selected dual triodes make sense here, especially when both systems of one tube are used in critical stages. For professional users, documented grading, repeatable measurements, and long-term availability are equally important so repair workflows and production processes remain predictable in Germany, across Europe, and via international delivery.
What do selection and matching mean for ECC82/12AU7 dual triodes?
Our 2-step selection means tubes are sorted by practical acoustic behavior (V1 suitability, low microphonics, low noise) to ensure defined properties such as low noise, low hum, and low microphonics. The optional matched / balanced selection means two tubes are closely identical (and, for dual triodes, also internally matched): within one tube, both sections are selected to be equal in gain and transconductance in an auto-bias mode, which improves channel consistency and also symmetry in balanced designs (e.g., with XLR).
In balanced stages, buffers, and output stages without global feedback, dual-triode matching is particularly relevant because imbalance can lead to higher distortion or level differences. In classic guitar-amp gain stages, low-microphonic selection for the V1 position is usually the priority; if matching matters at all, it is typically most useful for the phase-inverter position to support clean performance.
Availability, replacement, and shipping: what matters for service and OEM use?
Serviceability means compatible replacement types remain available for years and can be used safely within a clearly defined family. Availability matters for end customers and businesses alike because downtime translates directly into cost or lost use.
For Germany and Europe, a clear family strategy with ECC82 = 12AU7 as the baseline and approved variants such as 6189W Tung-Sol or ECC802s JJ enables fast repairs. For international delivery, it is advisable to define second-source options and selected alternatives per circuit position so replacement and long-term support remain predictable without exceeding the electrical limits of the specific circuit.