4 0hms

[deltaforce]

how much harder does an amp have to work at 4ohms compared to 8 ohms

reason i ask is i have a warrior da-1300 watt amp
and a set of 250 watt class-d's

i have just brought another set of the class -d's 250 watt

will this match ok

thanks

[deltaforce]

oh yea also as i will be connecting the cabs from one to the other
do i have to change the mode setting on the back of the amp to parallel
or do i leave it in stereo
thanks again

[Excalibur]

how much harder does an amp have to work at 4ohms compared to 8 ohms

reason i ask is i have a warrior da-1300 watt amp
and a set of 250 watt class-d's

i have just brought another set of the class -d's 250 watt

will this match ok

thanks

No probs at all. In some ways it's a free sound upgrade, cos you get extra drivers to move the air, and etxra power to move it with.

oh yea also as i will be connecting the cabs from one to the other
do i have to change the mode setting on the back of the amp to parallel
or do i leave it in stereo
thanks again

Stereo's absolutely fine.

[NKR]

The amp will run happilly at both loads and sounds like you have linked everything up correctly. No need to adjust your amp as my Yorkshire friend said.
More air movement is good, which is why I like to have 4 cabs going for medium sized rooms. You don't have to spank it as hard, so you should actually be doing your amp and cabs a favour.

[deltaforce]

thanks for that guys
also could you explain what the mode switch is for then
bridge, stereo, and parallel,

also there is a sensitivity switch on the back
the options are 1.44v, 1.0v or 0.775v
the manual don't really explain what the different settings are for
thanks

[Excalibur]

thanks for that guys
also could you explain what the mode switch is for then
bridge, stereo, and parallel,

Stereo, two separate channels, two separate volume controls
Parallel, left hand channel is fed to both sides, left hand volume control only, but still two channels. Often used for driving subs, especially if the mixer sub output is mono, which it often is.
Bridge. Right, now we're in advanced territory. This adds both channels into one, usually connected to different terminals ( which is why you normally need a special cable for this) . If you know what you're doing, it can be an excellent way of powering subs. If you don't know what you're doing, it's an excellent way of blowing something up.

also there is a sensitivity switch on the back
the options are 1.44v, 1.0v or 0.775v
the manual don't really explain what the different settings are for
thanks

Exactly what it says on the tin. Low numbers mean you only need small signals to achieve full rated output. Some mixers ( Denon for one) have different outputs. If you're running a high output from your mixer into a low input on your amp, it should light the clip lights very easily. Too easily, cos you're running too much signal into the amp. Conversely, if your mixer has a low output, and the amp is on high, you'll struggle to get the volume. Matched, or thereabouts is best.

[deltaforce]

cheers Excalibur valuable info
i was at a gig and noticed the amp was clipping slightly
when i got home realized the mode switch had been moved i generally
keep it at in the middle at 1.0v

[Tom]

I'm not sure on how much harder the amp will be pushed but if I am correct, because there is less or a resistance, more power can be transferred from the amp to the speaker. Just don't go under 4ohm.

Amp will get warmer as more power is being generated.

[Excalibur]

Stereo, two separate channels, two separate volume controls
Parallel, left hand channel is fed to both sides, left hand volume control only, but still two channels. Often used for driving subs, especially if the mixer sub output is mono, which it often is.
Bridge. Right, now we're in advanced territory. This adds both channels into one, usually connected to different terminals ( which is why you normally need a special cable for this) . If you know what you're doing, it can be an excellent way of powering subs. If you don't know what you're doing, it's an excellent way of blowing something up.
.

Hold the front page, I think I'm slightly wrong here. Both volume controls operate, it appears.

[ppentertainments]

Hold the front page, I think I'm slightly wrong here. Both volume controls operate, it appears.

Not like you to be wrong Peter