IRs made with tube amps (ML Sound Lab claims)

[HotRats]

Now who’s being pedantic?

I am, no doubts.

 

[Chocol8]

Unless two engineers make IR's of the same cab, using the same gear, then you quite literally have no ability to ascribe tonal differences to the engineer.

I get your point but on the other hand, we have had a ton of people capture thousands (10’s of thousands?) of IR’s of the same handful of 4x12’s with V30’s.

 

[FractalAudio]

Wait, what were we talking about?

Anyways... the reason that I, personally, use the "Mic + DI" method is that it doesn't matter how great your power amp is, there's a cable on its output (and connectors) and that cable has finite resistance.

For example, these vaunted old Crown power amps have advertised damping factors of over 1000. That implies an output impedance of less than 8 mohms. However, a typical speaker cable can have several tenths of an ohm of resistance. Let's assume 0.1 ohm on each conductor. That's 0.2 ohms total. This reduces your damping factor to 40. That's more than an order of magnitude worse.

It may not seem like much but those couple of a tenths of an ohm show up in the measurements. It's not huge, a few tenths of a dB, but it's not negligible either. I did some measurements at one point and the DI signal was definitely not flat. I seem to recall up to 1/2 dB with some speakers (4 ohms), maybe more.

Can you hear it? Dunno, but better to err on the side of accuracy.

 

[Chocol8]

Wait, what were we talking about?

A guy with Freddy Kruger syndrome, selling homeopathic remedies for the side effects of his homeopathic remedies, which then causes pedantic trolling over the inherent artistry involved in pointing an SM57 at a V30.

Come on, keep up!

 

[FractalAudio]

I forgot to add that the Mic + DI method compensates for ALL frequency response distortion, including the signal generator itself, between the signal generator and the amp and inside the amp.

 

[Chocol8]

I forgot to add that the Mic + DI method compensates for ALL frequency response distortion, including the signal generator itself, between the signal generator and the amp and inside the amp.

Now if we could only eliminate the mic and mic pre coloration as well.

 

[Boudoir Guitar]

Demonstrate to me how you know whether that (for example) 3kHz boost in your favourite IR came from a choice the engineer made, or whether it was a by-product of the speaker/cab/ir physical properties.

Exactly?

 

[FractalAudio]

Now if we could only eliminate the mic and mic pre coloration as well.

It's actually quite surprising how different pres can sound. Our Neve sounds considerably different than our API. All our Dyna-Cabs use the API now. The Neve sounds a little dull and bloated in comparison.

 

[Orvillain]

I get your point but on the other hand, we have had a ton of people capture thousands (10’s of thousands?) of IR’s of the same handful of 4x12’s with V30’s.

They all sound different.

 

[Chocol8]

They all sound different.

I haven't tried them all, but I agree many sound "different" and some are pretty "special". The real takeaway is different monkeys with the same gear get different results.