Vacuum Tube - 12AX7 / B759, Genalex Gold Lion
Genalex Gold Lion ECC83/B759 (12AX7) dual triode preamp tube with gold pins. Original Genalex Gold Lion ECC83/B759 tubes are considered among the best 12AX7 types ever made. They are hard to find and when they are available, they are expensive. They exhibit a large detailed soundstage that is sought after by discerning audiophiles who demand the highest quality sound. The reissue Genalex Gold Lion ECC83/B759 recreates the sound signature of the original. This tube features balanced sections and gold plated pins.
Accessory Items:
Pin Type | Our Part Number | UPC/EAN |
---|---|---|
Regular | T-12AX7-GEN | |
Gold | T-12AX7-GOLD-GEN | 841358101779 |
Amplification Factor | 85 - 115 | |
Capacitance, Cathode to Heater | 5.0 pF | |
Capacitance, Plate to Plate | 0.6 pF | |
Capacitance, input | 1.6 pF | |
Capacitance, output | 0.46 pF | |
Cathode to Heater Voltage | 200 V | |
Grid Circuit Resistance (Rg), Automatic Bias | 2.2 MΩ | |
Grid Circuit Resistance (Rg), Fixed Bias | 1.2 MΩ | |
Grid Reverse Current | 0.2 μA | |
Heater Current | 135 mA - 275 mA | |
Heater Voltage | 6.0 - 6.6 V / 12.0 - 13.2 V | |
Plate Current (Ia) | 9 mA | |
Plate Dissipation, per triode (Wa) | 1.2 W | |
Plate Voltage (Ua) | 330 V | |
Structure-borne Noise | 3.5 mv | |
Transconductance (S) | ≥ 1.4 mA/V |
Packaging Dimensions | 2.75 in. × 1 in. × 1 in. | ||
Weight (Packaging) | Gold version | T-12AX7-GOLD-GEN | 0.036 lbs. |
Regular version | T-12AX7-GEN | 0.034 lbs. |
T-12AX7-GEN - Regular version | Amplification Factor | 85 - 115 |
Capacitance, Cathode to Heater | 5.0 pF | |
Capacitance, Plate to Plate | 0.6 pF | |
Capacitance, input | 1.6 pF | |
Capacitance, output | 0.46 pF | |
Cathode to Heater Voltage | 200 V | |
Grid Circuit Resistance (Rg), Automatic Bias | 2.2 MΩ | |
Grid Circuit Resistance (Rg), Fixed Bias | 1.2 MΩ | |
Grid Reverse Current | 0.2 μA | |
Heater Current | 135 mA - 275 mA | |
Heater Voltage | 6.0 - 6.6 V / 12.0 - 13.2 V | |
Plate Current (Ia) | 9 mA | |
Plate Dissipation, per triode (Wa) | 1.2 W | |
Plate Voltage (Ua) | 330 V | |
Structure-borne Noise | 3.5 mv | |
Transconductance (S) | ≥ 1.4 mA/V | |
T-12AX7-GOLD-GEN - Gold version | Amplification Factor | 85 - 115 |
Capacitance, Cathode to Heater | 5.0 pF | |
Capacitance, Plate to Plate | 0.6 pF | |
Capacitance, input | 1.6 pF | |
Capacitance, output | 0.46 pF | |
Cathode to Heater Voltage | 200 V | |
Grid Circuit Resistance (Rg), Automatic Bias | 2.2 MΩ | |
Grid Circuit Resistance (Rg), Fixed Bias | 1.2 MΩ | |
Grid Reverse Current | 0.2 μA | |
Heater Current | 135 mA - 275 mA | |
Heater Voltage | 6.0 - 6.6 V / 12.0 - 13.2 V | |
Plate Current (Ia) | 9 mA | |
Plate Dissipation, per triode (Wa) | 1.2 W | |
Plate Voltage (Ua) | 330 V | |
Structure-borne Noise | 3.5 mv | |
Transconductance (S) | ≥ 1.4 mA/V |
![]() | All Models |
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Questions and Answers
Click each question to see its answers.
3 answers
Will this work with my Marshall AVT 150H?
Asked by Anonymous on October 7th, 2016.
Yes, this tube is comparable will all other 12AX7's and their variants.
These are not tubes designed for Guitar Amps, unless you were looking for the worst guitar sound possible. These are designed for audiophiles, not distorted guitar amps. Designed to NOT distort
Yes, this would be an awesome tube for a Marshall amp. It is about the highest gain 12AX7 you can find, and the higher the gain, the more distortion a high gain guitar amp will produce. High end audio equipment is designed not to produce any distortion, but to produce the cleanest and most high fidelity sound from the original signal source as possible. Guitar amps, on the other hand, are designed to introduce distortion ("clipping") into the circuit as the preamp volume is turned up. Blues players like to have the sound just on the "edge of breakup", so when they "dig in" and hit a string hard, the sound growls and barks, but when they pick softer, it sound clean. For this to happen, they need a tube with a good amount of gain, and the more gain a tube has, the lower the volume will be when it hits that "edge of breakup" point. For rock and metal players, they want a bit more distortion, so they prefer higher gain tubes which allow their amps to provide the amount of distortion they want throughout most of it's volume levels. If you're playing rock or metal, this would be an excellent tube to try out to get that high gain distortion that you're seeking.
1 answers
Would this be a good swap for the stock 12Ax7 in my Bugera V5 infinium. Im also looking for a great power tube replacement.
Asked by Anonymous on April 11th, 2018.
This is a very high gain preamp tube and if that is what you are going for then this is an excellent choice.
1 answers
Hello, is this a good choice to put in my Orange tiny bass amp?
Asked by Anonymous on May 22nd, 2018.
If your amp calls for a 12AX7 and you are looking for a tube with a lot of gain then this would be an excellent choice. Check out our 12AX7 comparisons here: https://www.tubesandmore.com/tech-corner/12ax7-comparison-current-made-tubes
1 answers
What tubes would you suggest for a fender blues deluxe?
Asked by Anonymous on June 8th, 2018.
Tube choices are highly subjective and have many variables (What type of guitar being used, the genre of music, your personal playing habits, etc) so we encourage you to check out our comparisons of 12AX7s and 6L6 tubes. https://www.amplifiedparts.com/tech-corner/12ax7-comparison-current-made-tubes https://www.amplifiedparts.com/tech-corner/6l6gc-comparison-current-made-tubes
1 answers
I would like to use this tube in my Orange Micro Dark and in my Fender Champ 600. Is this a good choice for that application?
Asked by Anonymous on September 12th, 2018.
Since both of your amps call for a 12AX7, it will certainly work. If you are looking for a tube that can produce a lot of gain then this would be an excellent choice. Check out our 12AX7 comparisons here: https://www.tubesandmore.com/tech-corner/12ax7-comparison-current-made-tubes
1 answers
Would these tubes work in my Jolida jd100 CD player?
Asked by Anonymous on October 19th, 2022.
The Jolida JD100 uses 12AX7s, so these will work for it.
Product Reviews
genalex gold lion are the tubes for the price.......AES is the fastest and best prices for tubes. thank you...
These tubes are badass in a bottle. I put them in v1 of my Mesa studio Pre and now I have them in v1 of every preamp and head that I own. I have never heard a studio Pre sound this good. I’ll buy more as soon as you get them.
Sounding great in V1 of my JVM Marshall. Very rich tone!
I had some JJ tubes before this and they did sound great in my custom 20 watt version of a hiwatt custom. One of my preamp tubes went out so I ordered these because i'd been wanting to try them but they were too expensive to justify before and holy crap these things are worth it. My amp was loud before and now its really loud and sounds killer! I highly recommend, well worth the extra money. Going to get power tubes soon from them to try out.
These tubes sound Great! I replaced all of my 12ax7’s in a Marshall jcm2000 dsl 100 and wow! Either it’s been way to long since I replaced tubes or I’m just a lucky guy?! The latter !
I have matched 6550’s pairs and it sounded so good that I haven’t put power tubes in yet... I’ll roll with the tone as is. Don’t want to mess up a good thing! Throw a few “gold pin” in the mix?
Order have been placed, hope get it soon
I have been using these tubes in every amp I own. They seem to push the power tubes better than any other I have used (whatever came OEM). They also seem to make the amp sound fuller and richer and more robust as far as I can tell. They also appear to be very durable. I Run my amps with EVERY knob cranked up as far as will go (and then use an attenuator to control the volume). I haven't had one fail yet.
I was looking foward to trying this tube out in V1 of an amp (S/E el34 based, 3 preamp stage) that I just built/designed. Unfortunately, it was extremely microphonic and completely unusable in this position; V2 it was great, but I prefer a Mullard in this stage (CF). I'm NOT knocking this product, but in a high gain amp at V1 I'd steer clear. Later positions would be better....lots of gain, good freq. response, but WAY too senitive for my build. Also, guys, if you intend on putting it in a 'normal' plexi, or bassman design, i.e. 2 preamp stages, not 3) this thing might rock! I tend to agree with Blackplates rewiew of this tube...it might REALLY work for you, or REALLY bummed you out. I was bummed... but as I said, I believe it can work well, but in the right position, with the right amp design.
Steve G. Ft.Worth,TX
Id like to add one comment to my review...The noise problems these long plate gold lion tubes suffer from could probably be solved if New Sensor would manufacture them with the correct, "star" shaped mica spacers..the ones with the little saw-blade points all the way around them.Look at any/all of your old Mullard, or Telefunken 12AX7 tubes.They all have those kinds of spacers..theres a reason for that..Those spacers distribute the pressure evenly all around the inside of the glass tube and cut down on vibration..Gold lions 12AU7 uses the proper spacers, why cant they put them in the premium 12AX7?
A VERY good sounding tube in all the Marshall piggy-back guitar amp heads Ive used them in .Believe it or not, this tube competes with my (real, Blackburn) Mullard long-plate 12AX7 tubes for quality of tone, in those amps. It is the only modern ECC83 type ive found that I can make that claim about. That said, I do not like them in combo amps, because of noise/vibration problems. They do-not work well in my Fender amps, possibly also they don't like to hang upside down .I REALLY really wish new Sensor, or Tube amp doctor or Groove tubes, would put the time and cost into producing an authentic reproduction of EVEN ONE of the great 12AX7 tubes of the past.There are many to choose from..so maybe the Mullard long plate would be too costly..I dont know..But what about the little RCA 7025 ? Or the GE 12AX7 short plate ? How about the Tungsram 12AX7? I would gladly pay $40 or $50 each If someone could put those tubes back into production...