I bought a yaqin mc10l today

Also if it's new do NOT trust that it came from the factory biased properly. If you bought it used I wouldn't believe the previous owner either unless you get the sense in corresponding with him that he does know what he's doing and set it properly.

I listened to the previous owner of one of my tube amps when he said the bias didn't need to be adjusted and I ended up burning out a tube up. The tube was not a cheap Chinese tube either, but a fairly expensive 50's RCA 6V6 blackplate that was part of a matched quad of power tubes.

Also never power up a tube amp without a load hooked up, meaning speakers. You can damage the transformers if you run a tube amp with out speakers hooked up or if you're familiar with electronics you can configure a "dummy" load in place of the speakers. Sometimes this is easier when you want to bias a tube amp. In your case if you bought the newer version it won;t be necessary to make a dummy load because accessing the bias points are easy.

One of my tube amps needs to biased from the bottom with the bottom plate removed. Meaning I have to turn it upside down and rest it on the tube cage to make bias measurements and adjustments. I'd say when it's new check the bias initially maybe once a week for a month and after that perhaps every 6 months depending on use. Always check the bias when rolling tubes and adjust accordingly.

H9

The instructions that came with my MC-10L are very brief, however, biasing the amp is very simple. Attach speakers to the amp and power the amp on. After a few minutes check V1 first. The reading should be between 350 to 400 millivolts. Then check V2, V3 and V4. Use the supplied allen wrench to make adjustments. Turning the allen wrench clockwise increases the voltage. It doesn't take much of a turn, perhaps an 1/8 of a turn, to get a change in voltage. The front 4 tubes do not get biased.

Married men all over this great country know your pain, and sympathize. Might I suggest reminding her how much you love her?

Looks good! What will you be powering with it? Does it come with a remote?

Yaqin makes good looking products.

polkfarmboy wrote: »

Wow !!!!!!!!!!!!!!! This aint even broken in yet and I can just tell its got way more authority than the onkyo 607 lol(obviously) . I feel that my reciever has robbed me of my audio childhood

The yaqin started up wierd ....Just clicked into my head that the tubes warm up:):D:D:D:D:D:D:D:D

Holy **** .....Theres so much slam as Ive gone through some tecno music

That was my reaction when I had it running the 1.2TL's. I'm really impressed with these amps.

Looks like we have another believer, and I may have to consider buying the 300B Yaqin amp... I've only heard good things about their line-up so far.

Congrats on the great amp! How's the biasing coming?

Congrats on the new amp. Glad to hear you're happy with it. Just make sure you are playing her type of music when she walks through the door.