OK, you have me very confused. with your chart http://www.axiomaudio.com/1500-amplifier it lists the ATA1500-4 at being 350watts at 4ohms and 325watts at 8ohms. I have the LFR1100 and running with the ATA1000-4 is shows me maxing out at 250watts. So do I have far more head room than I realize, or are you adding up the fronts and the backs into a single number?

Hi Matt,

The RMS power available to each LFR1100 using an ADA1500-4 is actually 750 watts. The total continuous output capability of the power supply is 1500 watts. Each amp channel can output 650 watts continuous. There are two amp channels driving each speaker so the maximum continuous output is being set by the power supply divided by two.

For an ADA1000-4 the maximum output of the power supply is 1000 watts continuous and each amp module is 250 watts continuous. Using a 6 ohm number for the rear the maximum continuous output available to each LFR1100 is 437 watts. Since the capacitance available for power storage is lower in an ADA1000 compared to an ADA1500 the dynamic headroom multiplier is also lower but it is still pretty good. Good dynamic headroom above the continuous power available is basically a matter that everything in the chain is capable of short bursts of power way above their continuous rating combined with the amount of capacitance available for power storage. The dynamic headroom is very important when considering your real-world overall power available for playing back a soundtrack.

Pretty soon I am going to change my system to have one ADA1500-2 driving each LFR1100. This will take the maximum continuous power available to each speaker up to 1200 watts (using a 6 ohm number for the rear) and double the dynamic headroom available to each speaker. The goal is to never hit the limits of the amplifier no matter the power being requested during the maximum dynamics of the soundtrack. And a good soundtrack will have very wide dynamics.

Thanks for that info.

And when you upgrade, if you want to sell your old ADA1500-4 for a really good price I'd be interested..

Thanks Ian. You are spot on with what I'm after.

So really I should be looking at a better power section. My eventual upgrade to Atmos with require an additional 2ch amp over and above my current separates. I think I will bump my current 2ch amp to side surround duty and get a new monster for R/L duty. Decisions. This route would be cheaper and less hassle for sure. Easier to sneak 1 box through the door.....

Amplifiers blend in so nicely with all the other gear the equipment rack. It is just getting them from the front door to the audio room.

I managed to bring in a pair of M3 bookshelves unnoticed! 😃
Jeff

Although with them now hanging on the wall their kinda obvious.

I wonder if the neighbors would notice me leaving the house in a rolled up carpet.... lol. I might try renting a pro amp and see how Uber power likes my mains. I have to decide between an ada 1500 and a QSC DCA 2422 if I go the mucho amp route. Either way I have some time to decide while I save and enjoy the summer.

Trevor, perhaps by the time you are ready for your dream system, a single driver speaker will be available that covers 80Hz to 20KHz. Otherwise, try to minimize the number of drivers and use a digital cross-over. Oh...and stay away from tubes, gramophones, reel-to-reel, cassette and 8-track .

Lol. You shit disturber you!

So I guess a 4head VCR (baller!) is out of the question for video too! No fun at all...