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Can I convert Acoustic B200 ext jack from series to parallel?

#21
JustOpenYourMind said:
Don't do this, you'll potentially fry your amplifier...

I'm pretty sure the manual saying 200W@2ohms is a typo or very dishonest marketing on accoustic's part.

If it was true the B200 with the internal speaker would be a 100W combo marketed as a 200W head.

Running an amplifier down to two ohms requires very good heat dissipation and quality components which I highly doubt are present in a budget combo.

Also, If the amps was truly 2 ohm capable why would they design the output jack in series? I'm pretty sure they did it that way so they could design an amp with the cheapest part possible that would sound the loudest with the internal speaker, otherwise they would have needed to design a 400W amp which would have been more expensive.

Bottom line:

I'm pretty sure the B200 was designed that way to save on parts and cost, not to prevent it's user to use it's ''full hidden potential'' that is just a simple mod away.

Also to make things better go read up on the effect of doubling the wattage on an amplifier, (I'm pretty sure there is a sticky on this).

There isn't a significant difference in output between a 100W amp and a 200W amp. Doubling your speaker area will however make your amp louder, even if its wattage is halved.

If you do the mod, you'll likely ruin your combo for very little results.
Click to expand...

BUT - there would be smoke and if it got video-recorded - ah well.

Don't smoke the poor amp just for the visuals.

And, actually - the B-450 and the B-600H are rated at 2Ω, so Acoustic does make them with that capacity. (They are both the same 600 Watt/2Ω amp)

I have had mine to 2.7Ω in a very hot studio at 100° for over 6-hours and the only thing that happened was the cooling fan went into hyperdrive and kept it cool, but the fan was screaming.
 
#22
Looks like they tried to make it "Fool Proof"
Apparently that's impossible :hiding:

You don't need to squeeze out every last watt. You really want to run external in series. At 8 ohms 4x10 it would get 2/3rds of the power, and the internal 4 ohm would get 1/3. More speakers would be louder than squeezing out a little bit of wattage. You'd have less "watts" but more "acoustic power" and better balanced the wiring for parallel.
 
#24
seamonkey said:
You don't need to squeeze out every last watt. You really want to run external in series. At 8 ohms 4x10 it would get 2/3rds of the power, and the internal 4 ohm would get 1/3. More speakers would be louder than squeezing out a little bit of wattage. You'd have less "watts" but more "acoustic power" and better balanced the wiring for parallel.
Click to expand...

You're right... I'll keep that in mind!:cool:
 
#25
If I had it all to do over from scratch, I'd buy a B-600H first with a B-410 and add either a B-810 or another B-410 to the mix.

What I did was get the B-450 and add a B-115 - which is very nice and tight and boom-y and super deep even it is is technically a mismatch all the 'way around.

I have run up to 14-10s out of the B-450 though with no problem when I play the 40-acre pasture barn-type dances. Keep it outta the SUN and away from any BBQs though and for gawd's sake, make sure you have full 120 volts at the plug too!

I digress. Perhaps you should consider to get either a B-200H or the B-600H and just get cabs of your choice from there - but DO look into the B-810/B-600H combination. It smokes some serious sounds and power enough to shatter crystal at 300 yards.

It IS old-school sounds though - so if you want to snap,crackle twang and pop, you might have to run the internal piezzo horns on the cabs too. I don't - but you might like them ON.
 

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