quick question

[ReeV0]

hi,

if you have a cab thats 600W at 8ohms, when you connect up another one and it goes down to 4ohms, does the speaker volume double? i.e. will it become 1200W, or will it just stay at 600W?

also, (this might sound a bit confuzzling) If i have a head thats 450W at 4ohms, and plug two 600W 8ohm cabs into it, does each cab get 225W out of the head, or the full 450W each?

thanks

[The Funk]

[quote name='jjl5590' post='174886' date='Apr 11 2008, 10:37 PM']If i have a head thats 450W at 4ohms, and plug two 600W 8ohm cabs into it, does each cab get 225W out of the head, or the full 450W each?[/quote]

Each cab gets 225W

[xgsjx]

Adding more cabs (eg: already having a 410 & then adding another 410 or 115) doesn't double the volume. Depending on the cab & amount of speakers decides on the amount of volume you will get. 600 watt X2 does not give you X2 volume & watts are incorrectly chosen as how loud an amp is. for example..
A 200 watt Valve head (Orange etc) with 2 400 watt 8 ohm cabs could sound a lot louder than a 5oo watt solid state head with a 410 and a 115.

[Musky]

+1 to what everyone else has said.

Wattage is no guide to how loud something will sound without knowing the other factors involved, the most important of which is the sensitivity of the cabs. Doubling the wattage will give you about 3db increase in volume - about the lowest amount that you would notice as an appreciable increase in volume. You could equally achieve that same increase in volume by using cabs 3db more sensitive, e.g. a 300W amp into a cab with 100db sensitivity would sound as loud as a 600W amp into a cab with 97db sensitivity (all other things being equal). Another way of thinking about this is that two guitarists using identical stacks will only be 3db louder than than just the one guitarist.

As I pointed out in the other thread, halving the impedance will give you about a 50% increase in wattage. This will only give you less than 2db increase in volume - ie scarcely noticeable.

All of which is another way of saying - DON'T GET HUNG UP ON WATTAGE! Please.

The GK will be loud enough - more than likely into the 2x10 you're looking at, definitely into the 4x10.

[bass_ferret]

How many more times?

[url="http://wiki.basschat.co.uk/info:amps:impedance_and_wattage"]READ THIS[/url]

[url="http://wiki.basschat.co.uk/info:amps:gain_power_and_volume_-_a_confusing_menage_a_trois"]AND THIS[/url]

If you dont understand ask, jusk dont keep ignoring it.