Tube amps and speaker ohms

The guy who bought my JOR , who actually owned 2 previous JOR's said the amp "should/ought" to be biased every year. Take that up with him. I figured he knows what he is talking about. said tubes wear every yr and a slight bias adjustment 'could be made". Obviously take all my posts as though i am a learning newbee. I hope no one takes anything i say with too much seriousness. Just ideas to open discussion. We can all learn something here. You too.

05-26-07: Bartokfan
The guy who bought my JOR , who actually owned 2 previous JOR's said the amp "should/ought" to be biased every year. Take that up with him. I figured he knows what he is talking about.

It's too bad you received bad advice. Tubes should be checked every few weeks or so for bias, and every time you install different tubes, they have to be biased.

Good lesson learned.

We can all learn something here. You too.
Bartokfan (Threads | Answers)

Yup. I learn something here every day.

Tvad, all the time I had the JOR i never thought to bias the unit to see if I could get a tad more highs. Now that i have the Defy 7, if there is something I don;'t like about the sound, i'll look into biasing the unit. But since the amp has few hours on it, should I bias the amp? It should be biased correctly with few hours use. I've never heard tube amps need biasing regularly. I should look into how to bias the defy 7. Not even sure how to go about it. There is a wooden board at the bottom. Will have mt tech friend assist me first time.
Also I learned the JOR had a pre out and never took advantage of in use with a sub. I will have Tyler replace the woofer in his Taylo with a Seas Excel W26. And so will keep my Thor's, which I had for sale 3 days last week.
The things we learn, one must research and think for oneself of all the options avaliable.

If the Defy is not autobiasing, then it requires biasing the first time you install it and power it up. Then, the bias should be checked at least monthly thereafter. Why? Because tubes age, and the bias shifts. Autobiasing amps take care of this for you.

Your amp's manual will explain the biasing procedure.

I just checked the biasing on my TAD-60 as I just changed an output tube and had to make adjustments to get the balance right as it did not sound right after I changed the tubes. Turned out I had to readjust two out of three tubes. Then I checked the sound and it sounded nice and balanced again... So, I agree with TVAD that you have to check the bias either every six months as Paul Gryzbek recommends or when the music doesn't sound balanced... On the TAD-60, Paul supplies you with a $10 meter and gives you instructions on biasing the unit. On the 07s, the biasing meter is on the unit...

Eagleman