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Re: AVR or pre amp recommendations? Going 4K
brendo #432614 06/17/19 10:18 PM
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That will only happen over some zombies dead bodies ... oh ... wait a second ... smile

Re: AVR or pre amp recommendations? Going 4K
rrlev #432619 06/18/19 03:04 AM
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Originally Posted By rrlev
Mojo ... give the guy some numbers ...
What do you think should be the cut off for those ... where it become just a spec and not audible...


Hmmm...yeah...numbers. smile

For S/N, you have to know two things: ambient noise of your space and the level where your ears compress. Ears compress at 120dB. Ambient noise is probably no better than 30dB. This means a S/N greater than 90dB is practically of no importance.

For THD+N, it's generally accepted that anything less than 1% over the entire audible band and volume levels is inaudible.

The figures above are for the entire *system* and not individual components.


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Re: AVR or pre amp recommendations? Going 4K
Mojo #432625 06/18/19 11:07 AM
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Originally Posted By Mojo

For S/N, you have to know two things: ambient noise of your space and the level where your ears compress. Ears compress at 120dB. Ambient noise is probably no better than 30dB. This means a S/N greater than 90dB is practically of no importance.

For THD+N, it's generally accepted that anything less than 1% over the entire audible band and volume levels is inaudible.

The figures above are for the entire *system* and not individual components.
ear compression ... interesting way to come up with a number ...

1% THD was the number I was using back in the day (because that, as you point out, was considered inaudible). I*d like to see something below 0.5 for my set up just because. Any thing below 0.1 I would call just a number. Using the same 10x cushion for your S/N number puts Noise at 100dB down ... I would not pick one system over another to do better.

BTW I doubt distortion is a real concern in any reasonable pre amp stage today.

Re: AVR or pre amp recommendations? Going 4K
michael_d #432626 06/18/19 11:52 AM
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I think I'm going to swap out my Denon for a used Anthem MRX 720. From what I've read, it'd be worth it just for the improvement that ARC brings over Audyssey.


Axiom M5HP VP160 M3 ADA1000
Anthem MRX 720
SVS SB-3000 (dual)
Re: AVR or pre amp recommendations? Going 4K
michael_d #432629 06/18/19 01:12 PM
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Be careful used. We've heard one horror story already. I'm waiting for Axiom's pre/pro.


v2tov4
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100,160,QS10,800,M2/3/5/50
N2,N3
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A-LFR1500 coming
Re: AVR or pre amp recommendations? Going 4K
michael_d #432631 06/18/19 01:26 PM
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Horror story? The 1120 that had issues after a firmware update?

Is Axiom actually working on a pre/pro?? shocked Would be awesome, although I know Ian despises room correction.

Last edited by bman84; 06/18/19 01:50 PM.

Axiom M5HP VP160 M3 ADA1000
Anthem MRX 720
SVS SB-3000 (dual)
Re: AVR or pre amp recommendations? Going 4K
michael_d #432632 06/18/19 04:17 PM
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I’m sure if they came out with a preprocessor it would be done well ... that said

It is also a lot of work if you are going beyond the standard surround decoding chips. Just look at all these companies sliding their dates (or worse coming out with half working products) trying to produce 16 channel surround. Not sure how Axiom would differentiate them selves otherwise. I think it would be high risk tech wise, resources draining and a hard sell to anyone who was not familiar with Axiom. It would have to have some sort of auto room correction for it to be a marketable product.

BTW I use room correction for my everyday room setups but will probably use REW to hand tune (treatment and parameters) for the theater once it’s finished.

Re: AVR or pre amp recommendations? Going 4K
michael_d #432633 06/18/19 04:26 PM
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Ian doesn't like the existing room correction because it's primitive. Imagine however an array of microphones that sense how The Family of Curves is affected by the room and compensated for in the DSP.


v2tov4
A-LFR/1000-8&2,500x2
1000&1500-3
100,160,QS10,800,M2/3/5/50
N2,N3
Audiobytes
A-LFR1500 coming
Re: AVR or pre amp recommendations? Going 4K
michael_d #432634 06/19/19 12:06 AM
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Would be awesome to see Axiom build their own room correction software, although I'd imagine that'd be quite an undertaking. Could license it to others if it turned out well though.


Axiom M5HP VP160 M3 ADA1000
Anthem MRX 720
SVS SB-3000 (dual)
Re: AVR or pre amp recommendations? Going 4K
bman84 #432639 06/19/19 12:57 PM
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Originally Posted By bman84
I think I'm going to swap out my Denon for a used Anthem MRX 720. From what I've read, it'd be worth it just for the improvement that ARC brings over Audyssey.


I'm very impressed with ARC over my last two Denon's with Audyssey. And I have not taken the time to really dig into the program and make room tweaks. I just ran it the one time with five locations and called it good.

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