Axiom Home Page Forums General Discussion Advice from Axiom Owners Selecting the right amp for the LFR1100

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I took the plunge and bought the ADA1000-4 at a bit more than was budgeted but still in my reach. Now I have to wait the 3-4 weeks for it to get made and shipped out to me. I know it will sound great and should have zero issues with the rest of my equipment. No humm's and enough power to bring a smile to my face.

Now I have asked and am waiting on the answer:

The ADA line of amps that Axiom sell are modular in the sense that they can be upgraded to add more channels at a later date as these are just amp boards that connect to the common linear power supply. On the spec sheet, they talk about "Max Output per Channel XX Channels Driven".

Now does that mean when the extra boards are installed, that is the maximum power that can be driven output regardless of the load on each channel?

For instance, if I have the ADA1000-5 and use it to drive 4 surround channels and a center, the center would have far more load requirement than the surrounds. Now would the center channel be able to deliver the Max 250w@4ohms as the surround channels will never require anywhere close to that amount of power.. or just because there are 5 amp modules inside the ADA1000, your maximum will be 200w@4ohms.

Guess this is an Andrew question as he designed this amp and will likely know.

As an additional question, what happens with the amp and it's output power when you have different resistance speakers hooked up. Like with my example, if you have 4 QS8 speakers @8ohms and a VP180 speaker @4ohms. What power would you get for the VP180? as it says all 4 of the QS8s would get max 125w

Yes, I bought the 1500-4 amp and forgot about the center channel. I also have the LFRs and the center channel in the DSP box, but I tried hooking the center channel up with an Outlaw mono through the DSP with the Axiom amp and I get a hiss in the system. So I bypass the DSP with the center and no hiss.

I guess the different gains are a no no with that. I hate to send the amp back for one channel but I might have to.

The problem is the Axiom DSP and I hate to say it... but it's badly designed. It can really only work with an Axiom AMP because of the way they implemented the floating ground on the unit. Your Outlaw mono probably has a more standard Direct Grounded Output design that is used in most of the major amp units on the market. I wonder if anyone has tried to hook up the Axiom DSP to a Bryson amp to see if it works. I don't know if it's a design thing with A/B type amps, but not with class D or Hybrid designs out there. It rather sucks.

I'm interested in this thread. I currently have M22 fronts, VP150 center and QS8 rears. I run a Denon AVR-991 and when in movie mode I have a Dayton HPSA-1000r amp running a big SVS tube sub. Been thinking of cranking up the power to the components and let the dogs eat. Been looking at hundreds of different posts in different forums on 5 channel amps and stacks of single channel amps. Just thought I'd check in here and see what people are using.