going from 8 ohms to 4 ohms without an extension cab..

#41
glocke1 said:
Is it possible?

If I have an 8 ohm cab, is there something I can put between the amp and the cabinet to make the amp think its actually on a 4 ohm load?
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Add another 8 Ohm load to the amplifier. Just to be clear a 8 Ohm load does not necessarily mean it is a cab, theortically it could be anything like an electric motor as well that shows 8 Ohm load to the amplifier. Why not play the bass guitar while your father is cutting wood just to satisfy your amplifier with a 4 Ohm load

Let me ask a stupid question, what's your issue why you have not enough juice with a 8 Ohm load with your amplifier?
 
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#43
ThisBass said:
Add another 8 Ohm load to the amplifier. Just to be clear a 8 Ohm load does not necessarily mean it is a cab, theortically it could be anything like an electric motor as well that shows 8 Ohm load to the amplifier. Why not play the bass guitar while your father is cutting wood just to satisfy your amplifier with a 4 Ohm load

Let me ask a stupid question, what's your issue why you have not enough juice with a 8 Ohm load with your amplifier?
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No issue..this was a more or less hypothetical question..
 
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#45
mcnach said:
your dummy load would make a nice stage heater for those cold winter gigs ;)
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I don't think the 1000 Watt dummy loud would heat the stage.
The bass guitar will probably utilize the amplifier not more than 1/4 (duty cycle) even if the amplifier may push "full power".
That's not more than 250 Watt and too less of power to heat the stage, so the dummy load was perfectly adecuate designed for 500 Watt heat dissipation
 
#46
To add to the electric motor theory,
why not make the most of the power wastage an use a bin shaker motor
(looks like a bench grinder with eccentric/unbalanced wheels),
to give some floor shaking deep vibes.

Picture below of theoretic bass sub-subs machine,.
RE-cut-away.jpg
 
#48
theculprit said:
What about a situation where you have a bridgeable stereo power amp? Here is a hypothetical.... 8ohm cab rated at 1,000 watts with a power amp rated at 500w per channel at 8 ohm.... 1500w bridged at 8 0hm... or 2000w bridged at 4 ohms. Ignoring the debate about under or overpowering speakers, is this a situation a dummy load would allow the best use of the bridged amp? Could you not show the bridged amp a 4 ohm load, and 1/2 the power (1000w) would go to the 1000w cab, and the other half goes somewhere (dummy load land)?
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This is one of those "the juice isn' worth the squeeze" moments.

You won't have an appreciably louder max volume through the same cab just by increasing watts, and your amp's wattage rating is simply it's peak output at whatever THD it was designed for.

You can safely run a 500 watt cab with a 1000 watt amp if you keep the volume reasonable: back when I still had a DB750 I used it with a single GS112 regularly.
 
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