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September 20, 2017, 08:45 AM #1
12AT7 vs 12AU7, Interchangeable? Pros and Cons? ...
Is the 12AU7 basically a lower gain version of the 12AT7 tube?
I'm using the new LTA MZ2 as a preamp and loving this little thing. It's doing an amazing job and comes standard with 12AT7. I am looking for a bit lower gain and understand that the 12AU7 should be a lower gain drop in replacement. Any thoughts on the 12AU7?Last edited by joeinid; September 20, 2017 at 08:50 AM.
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Topping D90, RME Audio ADI-2 DAC FS, ModWright Ultimate Sony XA-5400ES.
Burmester 948, McIntosh MCLK12, Kimber Kable, Siltech, Cardas, Avanti Audio cables.
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September 20, 2017, 08:51 AM #2
Re: 12AT7 vs 12AU7, Interchangeable? Pros and Cons? ...
Check with the manufacturer. In some cases you can, specifically if you're trying to lower the gain, but in many cases you cannot.
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September 20, 2017, 09:36 AM #3
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Re: 12AT7 vs 12AU7, Interchangeable? Pros and Cons? ...
Joe
It was done in one of the reviews on the advice of the company..Main - JVC QL-Y7/Denon DL-301 Mk II, Gold Note PH-10, Jays CDT3 Mk3 , Auralic Aries G2.2, Holo May KTE, Supratek Cabernet, Kinki Studio EX-B7 monoblocks, Verity Audio Otello, (2) Rythmik F12SE, Audio Envy IC, SC & PC's, Triode Wire Lab PC's, Inakustik USB and I2S, (2) Puritan Audio Labs PSM-156 with Groundmaster City, Timbernation rack
Family Room - Oppo UDP-203, Auralic Aries, Aqua La Voce S3, Kinki Studio EX-M1+, Nola KO, (2) Rythmik F-12G, Wireworld SC & IC's, Neotech PC's, SurgeX SA-1810
Greenville, SC- Jays CDT2 Mk 3, Auralic Aries G1, Holo Spring 3 KTE, Supratek Chardonnay, Odyssey Audio Kismet Reference, Rosso Fiorentino Volterra 2, (2) RSL Speedwoofers, iFi Audio Power Station, Wireworld IC's, Inakustik USB and I2s, Triode Wire Lab SC, Triode Wire Lab PC's, Furutech NCF Clear Line, Timbernation rack.
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September 20, 2017, 10:55 AM #4
Re: 12AT7 vs 12AU7, Interchangeable? Pros and Cons? ...
Thanks Jack, I'll go back and read them.
Fleetwood Deville by Oswald Mills Audio, Vienna Acoustics Haydn Jubilee, Wharfedale Linton w/ stands, Klipsch RB-75, Klipsch RP-160M.
Job INTegrated. Luxman L-595aSE
NAD C 658 streamer.
First Watt SIT-3, Job 250 Monos, NuForce STA200, AkitikA GT-102 amp, ASL Wave monos, Dennis Had 45 monos. Absolute Audio Labs PCF 25 amp (improved First Watt F7 super clone)
Topping D90, RME Audio ADI-2 DAC FS, ModWright Ultimate Sony XA-5400ES.
Burmester 948, McIntosh MCLK12, Kimber Kable, Siltech, Cardas, Avanti Audio cables.
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September 20, 2017, 11:56 AM #5
Re: 12AT7 vs 12AU7, Interchangeable? Pros and Cons? ...
Joe.......A 12AX7 and a 12AT7 tube are directly compatible and can be swapped. The primary difference is the tube gain. A 12AX7 has a gain factor of 100, whereas a 12AT7 has a gain factor of 60. The 12AT7 can also be substituted with a 5751 tube which has a gain factor of 70.
The 12AU7 is not considered a satisfactory replacement for a 12AX7 or a 12AT7. The 12AU7 has a gain factor of 19.Dan
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LIVING ROOM - McIntosh C2300, MC75 (2), MR85, Magnum Dynalab 205 Signal Sleuth, Sonos Connect, Simaudio MOON Neo 260D-T, Schiit Audio Yggdrasil, Aurender N100H, Shunyata Sigma USB cable, Sony DAT 60ES, Nakamichi BX-300, Micro Seiki DD40 w/m505A tonearm, Ortofon Cadenza Blue, PS Audio P10, Furutech Flux 50, Stillpoints Ultra Mini, PMC EB1i, JL Audio f113
VINTAGE - McIntosh 4300V, McIntosh MA230, Tandberg 3011A tuner, Olive 04HD, JBL 4312A
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September 20, 2017, 01:33 PM #6
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Re: 12AT7 vs 12AU7, Interchangeable? Pros and Cons? ...
From the Linear Tube Audio website description of the product in question.
"We now offer NOS 12AT7 tube options in the Tubes section. Purchase a pair to be installed in your amp or just an extra set. 12AU7 tubes also work in the MZ2, though the gain will be lower. This will only make a noticeable difference if using certain headphones or speakers. "Main - JVC QL-Y7/Denon DL-301 Mk II, Gold Note PH-10, Jays CDT3 Mk3 , Auralic Aries G2.2, Holo May KTE, Supratek Cabernet, Kinki Studio EX-B7 monoblocks, Verity Audio Otello, (2) Rythmik F12SE, Audio Envy IC, SC & PC's, Triode Wire Lab PC's, Inakustik USB and I2S, (2) Puritan Audio Labs PSM-156 with Groundmaster City, Timbernation rack
Family Room - Oppo UDP-203, Auralic Aries, Aqua La Voce S3, Kinki Studio EX-M1+, Nola KO, (2) Rythmik F-12G, Wireworld SC & IC's, Neotech PC's, SurgeX SA-1810
Greenville, SC- Jays CDT2 Mk 3, Auralic Aries G1, Holo Spring 3 KTE, Supratek Chardonnay, Odyssey Audio Kismet Reference, Rosso Fiorentino Volterra 2, (2) RSL Speedwoofers, iFi Audio Power Station, Wireworld IC's, Inakustik USB and I2s, Triode Wire Lab SC, Triode Wire Lab PC's, Furutech NCF Clear Line, Timbernation rack.
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AudioShark forum is a leading forum site for High End Audio Discussion, Stereo System Discussion, Home Theater System Discussion, Best Home Stereo System Discussion, Home Theater Installation Discussion etc.
The AudioShark forum was created for sharing the passion of high-end Audio. We have Audiophiles from all over the world participating and sharing their knowledge. From novice to experts, you will find a friendly environment for discussing about High End Audio, Stereo System, Home Theater System, Home Stereo System, Home Theater Installation, Amplifiers, Speakers, Subwoofers, Integrated System, Acoustic treatments & Digital Room Corrections and many more.
At AudioShark, we also have incorporated an exciting Marketplace where members can peruse terrific buys on used gear, as well as meet dealers and discuss the purchase of new gear.
We are as crazy about this hobby as you are! So come on in and join us! Audioshark.org the Friendliest Audio Forum!
Industry Participation Disclosure : The owner and administrator of Audioshark is the owner of Suncoast Audio LLC in Sarasota Florida. Suncoast Audio has a full brick and mortar presence in Sarasota with several great show rooms with many world class brands. More information can be found at http://www.suncoastaudio.com
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