Nice idea 👊

Can’t wait for kids to go back to school, my job list at work is getting longer and longer. 24/7 Daddy day care isn’t what it’s cracked up to be.

Link to pdf manual, page 42
http://https://images.thomann.de/pics/atg/atgdata/document/manual/c_218912_218913_218915_287602_325986_325988_v2_en_online.pdf" rel="nofollow - http://https://images.thomann.de/pics/atg/atgdata/document/manual/c_218912_218913_218915_287602_325986_325988_v2_en_online.pdf

And there is only a figure given for 8 ohm bridged. 

My question is this - can I power a 4 ohm load if it does not draw more than what it's rated for at 8 ohms?
More specifically I would like to power 4 the box 15LB100-8W drivers, again by thomann, connect in parallel 2 per bridged channel. 
Or would  I be better off just running them at 8 ohm one to each channel, considering the power rating is likely overestimated on both the driver and amplifier, and also that even if they are accurate 100W less than what it's rated at should not be an audible difference, and should not cause any issues if I don't drive the amplifier into clipping?

Sorry if this is a dumb quesiton or I'm not understanding this correctly, I am building my first system right now and it's time to shop for amplifiers on a very tight budget.

@shashnatiq

When bridgining 2 amp channels, each channel "sees" a load of hal the impedance.

So when you bridge 2 channels on a 8 ohm cab, then each channel will work in 4 ohms.

When you bridge 2 channels on a 4 ohm cab, then each channel will work in 2 ohms.

The t amps do not support 2 ohms loads, so in the same logic that they won't give power figures for 2 ohms, they don't give power figures for 4 ohms bridge, simply because the amp won't support that.

So it answers your questions easily, you can't bridge 4 ohms, then go for one driver per channel.

If that doesn't suit your needs, change the amp (or buy one more of the same and use'em in 8 ohms bridge)

By reading the specs of the amp and the stated 500W rms power handling of the drivers, doing one loudspeaker per channel should work,but you may find that the amp doesn't fully exploits the loudspeakers as they wertainly will be underpowered.

If you find yourself in the situation where the amp is at its max (on the verge of clipping) and you still expect more spl out of your drivers, then upgrade the amp.

Rule of thumb is chose an amp that is able to deliver 2x the RMS power of the drivers (so that would be a 4x1000W in 8 ohms, or 2x2000 in 4 ohms) then limit appropriatly. Then the amplifier will not be the limiting factor, but the loudpseker. Proper (rms and peak) limiting ensure you don't give too much pwer to the driver.

That being said everything is a matter of compromise, so if you're happy with the spl given by the drivers on that amp then no need to go bigger.

I dislike this idea for a few reasons

This forum also works as a sort of encyclopaedia if you know how to search it using google. Cramming everything in to one thread would ruin this. 

This forum doesn't have an issue with there being too many threads, I don't think anyone here is overwhelmed by all the new topics. 

Lastly we need some filler to push all the dumb threads about Brexit/Covid out of view so they are forgotten about. 

However, the drivers will be 2 pairs of 2, each connected in parallel. 
So it would be two 4 ohm loads for each of the bridged channels, not 2 ohm. In that case should It work?

The short answer is no. What JBK is saying, rightly, is that running 4 ohm load in bridge mode is effectively the same as running at 2 ohms per channel across the 2 channels that make up the bridge. So you would need a 2 ohm ready amplifier to do that.

Someone mentioned brexit heeheh, just got an order cancelled for a hefty sale on reverb cause of customs cost concerns from the buyer ahhh.

Also i need to buy something also quite pricey from the UK in the following weeks , ahhh why didnt you stay for a few more months atleast!!

Are there any talks of removing this crap in the future or is it set in stone?

edit

also i think a daily thread is a nice way to get the convos going and liven up the forum a bit ...

Anyone doing anything remotely interesting?

I've been playing with video walls  http://www.youtube.com/watch?v=YRlRHknIK3w" rel="nofollow - https://www.youtube.com/watch?v=YRlRHknIK3w

When using the amp in bridge mode, you effectively have one amp channel, not two.