GK 800RB Output
bass...@my-dejanews.com
wattage of this bass head. Their web site says that it puts out 300 watts
into 4 ohms. Is this bridged or bi-amped?
My main question is this: What is the output of the 800RB bridged into a
single 4 ohm or a single 8 ohm cabinet?
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Lord Valve
>
>I plan on buying a GK 800RB soon, but I am a little confused as to the
>wattage of this bass head. Their web site says that it puts out 300
watts
>into 4 ohms. Is this bridged or bi-amped?
>
>My main question is this: What is the output of the 800RB bridged
into a
>single 4 ohm or a single 8 ohm cabinet?
>
>--
>bass...@hotmail.com
>
While the 800RB has two power amps on board, it *cannot*
run in bridge mode. The LF amp is rated at 300 WRMS
across four ohms; on the bench it typically does 350
or so, when driven by itself. This amp could benefit
from the addition of extra capacitors on the rails,
and there's plenty of room inside the amp to put them in.
I recommend this. The other amp is rated at 100 WRMS
across an *EIGHT* ohm load, and I emphasize the word
*EIGHT* for a very good reason...the number one failure
I see on the 800RB is blown output transistors from
running a 4-ohm load on the HF amp. For some reason,
manufacturers have *STILL* not figured out that the
*correct* way to build bass cabinets is to make the
4-10 boxes 4 ohms, and the 2-10 boxes 8 ohms. So
far, it's the other way around for the most part.
In biamp mode, you'll have max power available from
the 888RB when you run a 4-ohm load on the LF amp,
and an 8-ohm load on the HF amp. In full-range mode,
the same signal is delivered to both amps (no crossover)
so most guys wind up just not using the smaller amp
when running full range. If you decide to use both
amps in the full range mode, make sure you observe the
cautions I listed above regarding impedances. BTW,
the HF amp's supply is undercapped, too...more
capacitance is a good idea. Have this done if you
buy the amp; print this out and give it to your tech.
He'll know what to do. If he doesn't, find somebody
else.
Lord Valve
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bass...@my-dejanews.com
performance, heat output, etc...)?
Thanks,
Eric
In article <7fl33g$h...@sjx-ixn5.ix.netcom.com>,
Lord Valve
>
>What effects will adding extra capacitors have on my amp (i.e. tone,
>performance, heat output, etc...)?
>
>Thanks,
>Eric
LV: You'll have more power before distortion sets in, and tighter
low end. No change in heat output. Do it.