AD140TC vs. AD30TC

Chris · Post by **Chris** » Fri Nov 21, 2003 4:43 pm

What are the main differences between them? I'd be running them through an Orange cab and want a sound like ATDI/The Mars Volta.

Thanks,
Chris

Meole · Post by **Meole** » Fri Nov 21, 2003 9:25 pm

One is class A, the other is class AB.

Chris · Post by **Chris** » Sat Nov 22, 2003 12:37 am

How does it change the characteristics and outcoming sound from the amps?

Meole · Post by **Meole** » Sat Nov 22, 2003 12:47 am

Class A amps run at full power all the time.
The tone is the same at any volume level.
Class AB amps the tone changes with the volume.

Zeb Chadwick · Post by **Zeb Chadwick** » Sat Nov 22, 2003 5:13 am

Hello Chris
well other than the blatantly obvious wattage difference. the class A and AB is also very important and I will get to that latter on. One of the most important factors that is being
over looked is the tube type or valve type. The AD30TC has EL84 output tubes and
the AD140TC uses EL34 output tubes. Tone wise there different beasts and thereÃ¢â‚¬â„¢s
the fact that the AD30TC has a tube rectifier and the AD140TC not stated by Orange
but I would assume it is solid state rectifier which will produce a tighter low end that
the tube rectified. How ever the AD30TC has a sweet sounding low end.

Class A and Class AB
In a Class A amp all power tubes conduct current all the time at or near maximum
whether or not a signal is presant. The audio flows seamlessly from one half to the other.
This creates a very smooth distortion and makes every note you play more defined
Class AB on tube is biased to turn on slightly before its opposite number cuts off this leaves a small amount of crossover distortion which is reduced with a negative feedback loop.
Class AB still has the fullness of Class A but has a harsher edge.

Hope this helps and let your ears be the judge
Zeb

Night owl

Post by **bclaire** » Sun Nov 23, 2003 2:55 am

I have one of each. They sound like an Orange. The AD140TC is louder. The AD30TC has maybe smoother distortion- they're both great. I use them interchangably depending on the venue size and type of gig.

and Sooner- that was the funniest thing I've read on here. Excellent! Billy

spoonie g · Post by **spoonie g** » Sun Dec 07, 2003 5:24 am

bclaire-

what size venues do you find the ad30 to be underpowered? I know the 140 would be too much for some of the venues I play, but I fear the 30 watt may be too low in volume for others.....

Post by **bclaire** » Sun Dec 07, 2003 4:37 pm

The AD30TC isn't underpowered actually- it's loud as a bastard- but if you were in a large band with two guitars, bass, keys, etc. you might find it getting lost onstage.

Now if you're talking about the 30 watt head through a 4X12, then that's a different story. My experience is with the combo- and I find with all combos that a good portion of the sound is going backwards as well as forwards and unless you raise the amp up, it's more difficult to hear than a 4X12 which has the top speakers higher up. 4X12's project forward- particularly Oranges- while combos are sorta surroundsound. Good for the drummer, though.

Hope this helps. Billy

Post by **bclaire** » Sun Dec 07, 2003 4:40 pm

oh.... wait. I didn't really answer the question.

Venue size also has a lot to do with what amp I feel like carrying <img src=icon_smile_big.gif border=0 align=middle>

Smaller clubs I bring the combo but lately I haven't been using the 140 half stack except for really big clubs where the onstage sound tends to get lost. But in all of these cases, I have used the 30 watt combo there as well when what I felt like lifting was a consideration.

Billy

AD140TC vs. AD30TC

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