Reactive vs resistive load

[Che_Guitarra]

I've come across a company called Two Notes which make a variety of products combining a guitar amplifier load box with cabinet/speaker emulation.  What a great idea.  And what great reviews i'm finding.  As good as the all-in-one modellers are becoming, there's something entirely more visceral and satisfying about playing and tweaking a real amp - especially ones you've built yourself.  If I can play my amps at any hour without the deterrent of volume then i'm all but sold on one of these solutions.  Anyway, i'm digressing.


Two Notes offer both resistive and reactive load boxes.  Only their top of the line solution has both loading types, but i'm afraid that'll be too far out of my price range.  I'm looking specifically at the Torpedo Live, priced at around $1000, which I believe is a reactive load type.

If you have any expertise in this area - what is the difference between resistive and reactive load in an output circuit?  And in an emulation scenario, is it a minor consideration or something that would be immediately obvious to the resultant sound?  Or is it just marketing gush used to baffle and wow consumers like me?

 

[abbey road d enfer]

If you have any expertise in this area - what is the difference between resistive and reactive load in an output circuit?

Loudspeakers have an impedance that varies with frequency, contrary to simple resistors.
A typical 8 ohms speaker will see its impedance vary as much as 6 to 10 ohms outside its resonnant frequency, where the impeadnce may be 10 times higher.
Two-note claim a difference; there is certainly one, but it may be subtle.

And in an emulation scenario, is it a minor consideration or something that would be immediately obvious to the resultant sound?

I think the algorithms used for the simulation of the speaker and mic response are dominant in the final result. Most of the effects resulting from the varying impedance are already included in the presets. I wouldn't worry too much about it.

 

[12afael]

yep the speaker have an impedance that make react the amp in a different way than a simple resistor. the problem is that you will not have all the speakers in a reactive emulation. it will be closer anyway.

I would love to have a two notes too but they are expensive and I already have a THD hot plate. it is resistive but it have bass and high boosts ,yeah it make it reactive but it is not emulating a speaker just EQing. I have many amps and just on the old ones I notice a big diference when they are played loud. modern amps create almost all the distortion at preamp stages.

I suppose that two notes are taking the signal for the impulse emulation from a resistive network.

two notes have a plug in version of their cabinet emulator, I have been working with my brother to make a similar box from an arduino and a sound card, we already have a code that make the convolution at realtime but we haven't tested yet at arduino, just at a linux pc. really my brother is the code master I can only encourage him...

Rafael

 

[CJ]

get a blown speak and make it a load,

http://groupdiy.com/index.php?topic=30936.0