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bass ohm help!!

#4
bstarbass said:
so i can easily run my 4 ohm head into an 8 ohm cab?
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Yes It is always safe to run a higher ohmage with a head as it will not put as much pf a loud or your head.. The higher the ohmage say 8,16,32...ect. the less your head will have to work and the less heat... Now if you go below the min 4 ohm rating it will make your head heat up way to much and cook it like yesterdays lunch...It is not wise to run a head below the minimum ohm rating... but no harm will come from a higher one seeing as there is less load. with a solid state head you can run them with out any speakers even plugged into them but a tube head you cant. just something to keep in mind!! Best of luck sorry this is a bit rush cause i am off to bed pm if you like if not there are lots of others on here that are good at this!! Check out FAQ i think they have something on this!! Cheers Mate!!~Elliot
 
#6
Is it this head or some variation of it? [Invalid or Expired Link Removed]

I used to play an early 90's PB500. Wish I still had that amp head sometimes. Really good sounding amps whether you played through carvin cabs or plugged them into something else.

Is your's a stereo/2 channel head like a power amp or is it a mono bass head?

Mine was laid out like a power amp. You could bridge it to do the high power mono out thing or bi-amp it but I usually just ran 1 cab off each side, the 15 being an 8ohm and the 210 being a 4ohm and adusted the power to each to sound good but it usually ended up some where in middle territory anyway. One of carvins strongest sounding amps, it has all kinds of twiddling you can do with it if you want to but has a simple layout and things make sense and it can be a good sounding, simple amp if you want it to be as well.
 
#9
Downside is it's really hard to find replacement circuit boards/parts for them now. A good tech could find the bad parts and replace them with new ones of proper values, etc. but it can take a lot of time to chase all that down, adding to repair costs if a repair is even possible.

I should say, "if an easy repair is possible."
Repairs are always possible, just depends on how much time and $ you want to spend on them.

Those amps are made with modular circuit boards for the individual sections of the amp, connected together with a few differently shaped, many wire having plugs. Problem is, I don't think carvin's even making any of these boards anymore so somebody's going to have to figure it all out, chase down the problem and say hey, it's this 24cent resistor. But it takes more knowledge and more time than ya think to figure all that out so repairs become expensive, schematics are hard to find.
 
#10
bstarbass said:
mine is the older version the 80s one, mine says it has 2 4 ohm outputs on the back, but their website says 2 ohms. hmm
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That means the outputs are wired in parallel like every other bass amp and it supposed to be ok to 2 ohms. That's probably why they put "4ohms" on each output, just to be safe. A pair of 8ohm cabs strung together off a single output should be the same as plugging one into each jack on the head, ass-uming it's the 80's mono head. They were built in big cases to look like a tube head but if you took them out of the big case, you could screw rackears onto them and they were 2RU bassheads.
 

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