Never a bad idea to add a second 212av unless your head can't do 2 ohms.
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2013 Ampeg V-4B 100W Reissue Pt2
- Thread starter Chef
- Start date
I've run mine at 2 ohms for hours and hours without issue.
That video also scared me a bit, specially since I had an SVT Classic that gave me a lot of problems. But after trying the V4b in a store I was sold!!! Mine is dead quiet with plenty of power and the SOUND!!! Together with the Svt 212 av it is for me my favorite bass tone.
I'm sure Jimmy will chime in (hopefully), but I seem to recall him saying that the V4B can tolerate a 2:1 mismatch in impedance, so it could be ok.... wait for more informed sources though... 
oops he already beat me to it... good Sounds like it can be done - which I am glad to hear too, as I may want to run 2 212av's in the future as well.
Sounds like it can be done - which I am glad to hear too, as I may want to run 2 212av's in the future as well.I'm sure Jimmy will chime in (hopefully), but I seem to recall him saying that the V4B can tolerate a 2:1 mismatch in impedance, so it could be ok.... wait for more informed sources though...
No mismatch with the V4B, it's designed with 2 ohm speaker outs.
Actually, mine only has two taps, with a 4 and 8 ohm switch. It's a 90's model, and while it says V-4B on it, is probably more like the V4BH.
Yep, that's what I was saying. However, since this amp apparently has some tolerance for impedance mismatch, would 2 ohms be pushing it too much? Those who have run at 2 ohms, were you running off the version that does 2 ohms or not?
johnsonabq
Watch out where the huskies go...
If the amp doesn't state it'll do two ohms, best if you stick with four or eight. Might not "hurt" the amp and it'll just shut down until the two ohm load is removed but why chance it?
I agree, I'm not planning on it. Just wondering what other's thoughts/experiences have been on this. Thanks
The V4BH has taps on the transformer for 16, 8, and 4 ohms, the selector switch is for 8 or 4 ohms. Every amp has some tolerance for an impedance mismatch without damaging it, it isn't written in stone. Some output transformers operate at their current capacity, others are conservatively rated and can take more than the amp is designed to produce. It also depends on how hard you push the amp when you are playing.
I believe that it would be best to not run this amp with a 2 ohm cab combination. If you do, use common sense and keep a close eye on the power tubes and transformer for excessive heat.
It goes without saying, I guess but... 2 212s absolutely rock. One is good, two are bigger, fatter, deeper. And I would imagine maximize the V4s 100 watts. They're great cabs...oops he already beat me to it... good
johnsonabq
Watch out where the huskies go...
Pardon my tube amp ignorance as I've never owned one but...
The V4B puts out the same power regardless of the ohmage, as opposed to solid state which increases output as ohmage decreases. Correct?
The V4B puts out the same power regardless of the ohmage, as opposed to solid state which increases output as ohmage decreases. Correct?
johnsonabq
Watch out where the huskies go...
Prepare to take some crap for using the word "ohmage." [emoji14]
johnsonabq
Watch out where the huskies go...
