Introduced in 1963, the legendary 7591a was an improved design w/ better screen dissipation and a low-loss base. warm rich sound reproduction w/ grey plate internals, live-concert holographic sound reproduction w/ vinyl style intimacy.
All tubes show two date codes. One is a 1968 date of "68-06" and the other is 1970 date code of "70-30". They feature black plates and a disc getter. Audio Rectifier Tubes (5Y3, 5U4, GZ34, etc). Yes, it's that simple!
audiophile vintage black plate soviet made 6as7g / 6h13c power tubes w/ coke bottle glass, old stock pairthe legendary thick dual-disc getters are the same found in holy grail reflektors, sony c800 mics + morethese highly durable long life tubes provide premium quality build and regarded sound output a natural sound stage w/ beautiful airy highs, excellent detail and clarity, and a rich warm tonality relaxed in vibe w/ spacious holographic sonics, accurate crisp imaging, and dense immediacysimilar to german variety w/ pin-point precision and no brittle harshness these russian made vintage tubes are a top choice and popular alternative to expensive european varietyalso popular in a variety of amps such as otl, bottlehead, woo audio, darkvoice, atma-sphere + more all tubes are twice tested, and undergo a complimentary refurbish and deoxit process ~ one of a kind quality control! full mutual gm conductance tested pair, several pairs in stock useful life test pass! (a key longetivity indicator) + leak / short / gas check give 100+ session hours w/ your specific amps voltage to fully settle-in / break-inships well packed worldwide w/ free economy postage! plain or branded boxes included ~ authentic vintage hifidelity audiophile / preamp / mic / power tube curation by caliacoustics~ see our website! new arrivals + limited special editions + rare true-nos sealed box + pinched waist rarities + high-resolution headphones
I test all tubes thoroughly and with great care. I test to the best of my ability, and I report all results honestly.
I test all tubes thoroughly and with great care. I test to the best of my ability, and I report all results honestly.
I test all tubes thoroughly and with great care. I test to the best of my ability, and I report all results honestly.
These tubes have defined lows, and smooth highs. We all know that swapping out tubes can be one of the more effective ways of improving your tone.
TESTS NOS on Amplitrex AT1000. Amplitrex AT1000 Test Results 95%+ GM = Within NOS Specs 90%+ EM = Within NOS Specs. All tubes are tested with the Audiophile in mind for SHORTS, GAS, MUTUAL CONDUCTANCE and NOISE (large tube lots are not tested for noise).
🔥 RCA U.S. ARMY 6SN7GT VT-231 CLASS MATCHED PAIR 🔥. Late-1940s RCA Military Production. 📦 RCA Radiotron Boxes Included. ✅ U.S. Army Contract Tubes. MATCHED SET. ⭐ Genuine RCA Radiotron manufacture.
Brand New Genalex Gold Lion 12AX7 / ECC83 / B759 Single Tube 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. Why You Should Do Business With UsComes with original packaging from the factory, as shown in the pictureVery competitive pricesFast shippingShippingTubes will be shipped with USPS First-Class MailMost orders are shipped within 24 hoursTracking information is included for every purchaseReturn Policy Customer satisfaction is our #1 priority. If you are not pleased with your purchase you may return your item for a refund up to 30 days after purchase. About Us We are musicians who crave awesome tones. We all know that swapping out tubes can be one of the more effective ways of improving your tone.