noval Power tubes, type EL84, 6BQ5, 6P14P, SV83, 6P15P Unless otherwise specified, these are matched in-house at BTB with an anode voltage of 300 volts
Noval B9A 9-Pin tube valve base Gold Standard EL84 d=21mm, h=71mmGold Standard EL84 for Audio, Guitar, Radio, Receivers, Experimentstendence warm sound, wide room, nice mids and smooth highs
Delivery time: ca. 1 - 5 days
Noval B9A 9-Pin tube valve base Gold Standard EL84 d=21mm, h=71mmGold Standard EL84 for Audio, Guitar, Radio, Receivers, Experimentstendence warm sound, wide room, nice mids and smooth highs
Delivery time: ca. 1 - 5 days
Noval B9A 9-Pin tube valve base Gold Standard EL84 d=21mm, h=71mmGold Standard EL84 for Audio, Guitar, Radio, Receivers, Experimentstendence warm sound, wide room, nice mids and smooth highs
Delivery time: ca. 1 - 5 days
Noval B9A 9-Pin tube valve base Gold Standard EL84 d=21mm, h=71mmGold Standard EL84 for Audio, Guitar, Radio, Receivers, Experimentstendence warm sound, wide room, nice mids and smooth highs
Delivery time: ca. 1 - 5 days
Noval B9A 9-Pin tube valve base Gold Standard EL84 d=21mm, h=71mmGold Standard EL84 for Audio, Guitar, Radio, Receivers, Experimentstendence warm sound, wide room, nice mids and smooth highs
Delivery time: ca. 1 - 5 days
Noval B9A 9-Pin tube-valve-base-RöhrensockelThe Premium EL84 for your Guitar or Bass Amp all brands up to 350VoltsIt is extra handselected by BTB for low leakage and good parametersThe original sound and Power of the Amp is the Focus for this tubeThe tube is designed and made in EuropeS4GB ® "Selected For Guitar & Basses" is a registered Trademark by BTBheight:71mm-bulb diameter:21mm (info can vary!)EL 84 tube
Delivery time: ca. 1 - 5 days
Noval B9A 9-Pin tube-valve-base-RöhrensockelThe Premium EL84 for your Guitar or Bass Amp all brands up to 350VoltsIt is extra handselected by BTB for low leakage and Premium matchingThe original sound and Power of the Amp is the Focus for this tubeThe tube is designed and made in EuropeS4GB ® "Selected For Guitar & Basses" is a registered Trademark by BTBheight:71mm-bulb diameter:21mm (info can vary!)EL 84 valve
Delivery time: ca. 1 - 5 days
Noval B9A 9-Pin tube-valve-base-RöhrensockelThe Premium EL84 for your Guitar or Bass Amp all brands up to 350VoltsIt is extra handselected by BTB for low leakage and Premium matchingThe original sound and Power of the Amp is the Focus for this tubeThe tube is designed and made in EuropeS4GB ® "Selected For Guitar & Basses" is a registered Trademark by BTBheight:71mm-bulb diameter:21mm (info can vary!)EL 84 tube
Delivery time: ca. 1 - 5 days
Noval B9A 9-Pin tube-valve-base-RöhrensockelThe Premium EL84 tube for your Audio and High/End Amps up to 350VoltsIt is extra handselected by BTB for low leakage and good parametersThe original sound and Power of the Amp is the Focus for this tubeThe tube is designed and made especially for Audio useS4A ® "Selected For Audio" is a registered Trademark by BTBheight:71mm-bulb diameter:21mm (info can vary!)EL 84
Delivery time: ca. 1 - 5 days
Noval B9A 9-Pin tube-valve-base-RöhrensockelThe Premium EL84 tube for your Audio and High/End Amps up to 350VoltsIt is extra handselected by BTB for low leakage and good parametersThe original sound and Power of the Amp is the Focus for this tubeThe tube is designed and made especially for Audio useS4A ® "Selected For Audio" is a registered Trademark by BTBheight:71mm-bulb diameter:21mm (info can vary!)EL 84
Delivery time: ca. 1 - 5 days
Noval B9A 9-Pin tube valve base RöhrensockelThe Premium EL84 valve for your Audio and High/End Amps up to 350VoltsIt is extra handselected by BTB for low leakage and good parametersThe original sound and Power of the Amp is the Focus for this tubeThe tube is designed and made especially for Audio useS4A ® "Selected For Audio" is a registered Trademark by BTBheight:71mm-bulb diameter:21mm (info can vary!)EL 84
Delivery time: ca. 1 - 5 days
Noval B9A 9-Pin tube-valve-base-RöhrensockelReplica Version of the former US made EL84 Tung-Sol - now made in Russiasmooth sound, no harshness, good for long time listeners and usersheight:71mm-bulb diameter:22mm (info can vary!)EL 84Tung-Sol (RU) Pentode
Delivery time: ca. 1 - 5 days
Tung-Sol EL84/6BQ5 power pentode, B9A, 6.3 V, 14 W plateTwo output valves matched by BTB at a practical 300 V test pointFor compatible hi-fi and guitar push-pull stages using two EL84sOfficial maximum height is 78.5 mm; verify bias and heater supply
Delivery time: ca. 1 - 5 days
Noval B9A 9-Pin tube-valve-base-RöhrensockelReplica Version of the former US made EL84 Tung-Sol - now made in Russiasmooth sound, no harshness, good for long time listeners and usersheight:71mm-bulb diameter:22mm (info can vary!)El 84Tung-Sol (RU) Pentode
Delivery time: ca. 1 - 5 days
If you want to Upgrade your Amp, use this type! It sounds very clearneutral, wide and correct room and good timing and it has a good Powerheight:71mm-bulb diameter:22mm
Delivery time: ca. 1 - 5 days
Noval B9A 9-Pin tube-valve-base-Röhrensockellonglife Audio EL84-6BQ5 6P14P-EB NOS tube
Currently sold out
Noval B9A 9-Pin tube-valve-base-Röhrensockellonglife Audio EL84-6BQ5-6P14P-EB NOS tube
Currently sold out
Noval B9A 9-Pin tube-valve-base-Röhrensockellonglife Audio EL84-6BQ5-6P14P-EB NOS tube
Delivery upon request
Genalex Gold Lion N709/EL84 power pentode, B9A, 6.3 V, rated 14 WTwo output valves matched in-house by BTB at a practical 300 V pointFor compatible hi-fi and guitar output stages using two EL84 tubesOfficial N709/6BQ5 equivalent with single-halo getter construction
Delivery time: ca. 1 - 5 days
If you want to Upgrade your Amp, use this type! It sounds very clearneutral, wide and correct room and good timing and it has a good Powerheight:71mm-bulb diameter:22mm
Delivery time: ca. 1 - 5 days
EL 84 RSD - EL84 RSD - EL 84RSD - El84RSDNoval B9A 9-Pin tube-valve-base-Röhrensockelvery rugged, stable NOS tube, dynamic, open sounding, tight lowsthis tube was well tested up to Ua=350VoltsRSD ® is a registered Trademark by BTB
Delivery upon request
EL 84 RSD - EL84 RSD - EL 84RSD - El84RSDNoval B9A 9-Pin tube-valve-base-Röhrensockelvery rugged, stable NOS tube, dynamic, open sounding, tight lowsthis tube was well tested up to Ua=350VoltsRSD ® is a registered Trademark by BTB
Currently sold out
EL 84 RSD - EL84 RSD - EL 84RSD - El84RSDNoval B9A 9-Pin tube-valve-base-Röhrensockelvery rugged, stable NOS tube, dynamic, open sounding, tight lowsthis tube was well tested up to Ua=350VoltsRSD ® is a registered Trademark by BTB
Currently sold out
Noval B9A 9-Pin tube valve base Röhrensockelgood price to quality rate EL84 for HiFi and Music AmpsEH = Electro Harmonicsheight:70mm-bulb diameter:22mm (info can vary!)EL 84EH tube Pentode
Delivery time: ca. 1 - 5 days
EL84 / 6BQ5 power tubes – selection, interchangeability, and use in guitar amps & hi-fi power amps
What are EL84 and 6BQ5, and what do power tubes do?
EL84 and 6BQ5 are noval 9-pin (B9A) power tubes that generate the output power in tube amplifiers and drive the loudspeaker through the output transformer. They are used in guitar amplifiers, hi-fi power amps, and tube radios when an efficient power stage is needed in a compact format.
The EL84 is especially well known from push-pull output stages using two or four tubes per amplifier, but it also appears in single-ended designs (often in guitar amps or radios). In practice, the tube must not only fit the socket, it must also match the circuit conditions (operating voltage, bias/idle current, transformer load, and cooling) to achieve correct power output and tube life.
Are EL84 and 6BQ5 interchangeable, and where are the exceptions?
EL84 and 6BQ5 usually refer to the same tube type and are directly interchangeable in most equipment. EL84 is the European designation, while 6BQ5 is the international designation.
Exceptions mainly arise when a manufacturer specifies a particular grade or when an amplifier runs the tubes close to their limits; in such cases, verifying bias and operating conditions after replacement is good practice, especially in compact chassis with high heat load.
What is E84L and when is this variant useful?
E84L is a higher-specified variant within the EL84 family intended for higher load capability or more robust operating conditions. It is typically used where power tubes are thermally or electrically stressed and additional operating reserve is desired.
E84L is commonly considered compatible with modern EL84M and with ruggedized 6P14P-EB variants, but the final criterion should always be the device’s operating conditions and approval for the exact application.
What role do 6P14P and other designations play compared with EL84?
6P14P (often written 6n14n) is a common Russian/Asian designation within the EL84-related family and is used as a compatible alternative in many circuits. In practical servicing, performance differences are often driven more by manufacturing variation and screening than by the label itself.
For noise-sensitive hi-fi use and for consistent guitar-amp servicing, choosing tested or selected tubes can be more relevant than chasing uncommon names.
Why do hand-selected pairs and quartets matter for EL84?
Hand-selected means power tubes are sorted by electrical parameters so they operate evenly in the amplifier. A hand-selected matched pair or matched quartet reduces idle-current spread and improves symmetry in push-pull stages, supporting reliability and predictable distortion behavior.
Selection grades such as S4A (often used for audio/hi-fi) and S4GB (often used for guitar amps) indicate different screening priorities. Beyond that, matched pairs, quartets, and octets can also be matched by current draw and transconductance (gm), which helps balance left/right output in stereo amps and supports repeatable service outcomes. For end customers, matching is most relevant when a stereo amplifier uses two or four EL84/6BQ5 tubes to maintain equal level and behavior between channels; for B2B users (workshops, service operations, OEMs, developers), matching simplifies series servicing and reduces complaints.
How do I choose the right EL84/6BQ5 for guitar amp, hi-fi, and service work?
The right choice depends on the application, the desired tonal behavior, and the budget, because there is a wide range of available versions and grades. When unsure, a targeted request based on the exact amplifier model and tube position is often the fastest way to select a suitable set.
For service scenarios, documenting the existing tube set and checking bias/operating points after replacement helps keep results consistent across repairs.
What about availability, shipping, and spare-part supply in Germany/Europe?
EL84/6BQ5 are among the most widely used audio power tubes and are therefore common replacement parts. They have been in ongoing production at multiple factories, which supports practical long-term servicing.
For Germany and across Europe, stable supply matters because many guitar amps and hi-fi amplifiers are operated long-term and retubed regularly. End customers benefit from fast availability and clear selection guidance (correct type and matching), while professional users focus on consistent specifications and predictable re-ordering. International shipping is relevant for export equipment, touring rigs, and globally supported service cases.