#141
|
|||
|
|||
EDIT:
Mine has the faintest hiss or hum that doesn't change at all when I adjust the volume up and down. I don't know if yours has more than that or not, but I am able to hear something. There's no way I can hear it unless I have my ear right next to the tweeter though. Has yours done it from day 1? Is the humming coming from both channels? Do you have any other 12AX7 or 12AT7 tubes you can swap the originals out with? Is it a 60 cycle hum, or more of a hissing sound? Are you able to feel any vibration when you place your fingers on the woofer cone? You may want to test it at a friends house and see if you can still hear it there. Last edited by Route 66; 07-17-2018 at 02:24 PM. |
#142
|
||||
|
||||
Yep......... order a new set of tested & matched tubes from our own AAf member, vintage_tube, and am guessing your hum will be gone.
__________________
Glenn... Canton Reference 9 Clearaudio SM Pro Focal Bathys JLA 10" Dominion Kuzma Stabi S w/MC & MM Magnepan 1,7i McIntosh MA8950 & MR88 Oppo 203 Roon Nucleus Rose Hifi RS150B Shunyata Gemini-4 Sony ST-A6B, TA-F6B, ST-J75 & PS-X75 Sorane SA1.2 & TA-1L Stillpoints LP1v2 WW Pt, Au & Ag |
#143
|
|||
|
|||
Kevin Deal of Upscale Audio in California burns in and tests all the tubes they sell so you know your getting a good product. Been dealing with him for years!
|
#144
|
|||
|
|||
He's a great guy to talk to too and his store is unbelievable!
|
#145
|
||||
|
||||
I got burned twice on NOS tubes from uncle Kevvy at Upscale. I purchased 2 NOS Mullard CV4003 tubes and one went microphonic within 6 months. Bought 2 pairs of NOS Mullard 12au7 tubes and one tube in each channel developed a loud hiss within 6 months. This was in 2 different systems.
|
#146
|
|||
|
|||
Tubes aren''t perfect, but I've been dealing with him for close to 20 years and have had nothing but good results.
|
#147
|
||||
|
||||
Quote:
__________________
Glenn... Canton Reference 9 Clearaudio SM Pro Focal Bathys JLA 10" Dominion Kuzma Stabi S w/MC & MM Magnepan 1,7i McIntosh MA8950 & MR88 Oppo 203 Roon Nucleus Rose Hifi RS150B Shunyata Gemini-4 Sony ST-A6B, TA-F6B, ST-J75 & PS-X75 Sorane SA1.2 & TA-1L Stillpoints LP1v2 WW Pt, Au & Ag |
#148
|
|||
|
|||
Quote:
Turn up the vol doesn't get it louder. it's on both channels. So i guess it does to most of the MA252? consider it to be normal? i do not have other tubes.... i just test it with a headphone plugin and playing music, the hum or hiss still there to both speakers. This is what the Mcintosh quality? or i am just being picky? |
#149
|
||||
|
||||
Quote:
__________________
Lossless > D100 / Yami YP 450 tt > MA7000 > KEF RDM3 / SVS SB2000 / Too much music, not enough time. |
#150
|
|||
|
|||
Quote:
__________________
Clearaudio Ovation with Tracer Dynavector KARAT 17DX Naim Uniti Core Schiit Yggdrasil McIntosh C22/MC275 Wilson TuneTots B&W DB3D Nordost QKore/QBase/Frey 2 Transparent Super IsoAcoustics GAIA II Stax SR-009S with SRM-700T |
|
|
Audio Aficionado Sponsors | |