Stereo Integrity TM65 MkII drivers...

ChopsZ

I don't understand. What is this supposed to do vs me just entering the distance by inches? Because the software allows me to enter either.

In fact, entering the delay, it lessens the distances drastically.

Measured is...

LT - 36"
LM - 40"
RT - 50"
RM - 53"

But after entering the delay into the Helix software, the distances are...

LT - 16.59"
LM - 12.69
RT - 2.93"
RM - 0.0"

Aren't they both doing the same exact thing with the same exact results?

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AUDIO: Arc Audio | Bazooka | Helix | Pioneer | Stereo Integrity

DrNumbers

Your measured distances are the distance between the speaker and your ears. The distances you see in your Helix is the difference between: (1) your measured distance to the speaker and (2) the distance to the most distant speaker. For example, your RM is the furthest away at 53". Your left tweeter is the closest at 36". So the left tweeter gets delayed by the amount of time it would take sound to travel 17".

So it would appear that your DSP wants the relative difference in distance to your most distant speaker and not the actual distance. Ultimately, the distance and time measurements are designed to do the same thing.

Edit: I would double-check the manual just to make sure what the DSP wants for time alignment. My DSP uses the actual distance to each speaker to set delays.

ChopsZ

I understand all of that. My point being that the software allows both. I imagine both would give the same acoustic results.

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She's For Sale! PERFORMANCE: Aero Workz | Akebono | BC Racing | EcuTek | HKS | MaxBore | Motordyne | Nismo | RJM | SPL | StopTech | Z1
AUDIO: Arc Audio | Bazooka | Helix | Pioneer | Stereo Integrity

DrNumbers

Your statement that "In fact, entering the delay, it lessens the distances drastically" caused me to assume otherwise because I don't think calling a 17" difference vs a 16.59" difference for your left tweeter a drastic change. That equates to a few hundredths of a millisecond difference in delay. In which case, that means you must be a true audiophile, because you can hear things that aren't really there.

To more directly answer your question though, both distance and time delay are there to achieve the same objective. Using the milliseconds (i.e. time delay) allows you to do more of a fine-tune. It can come in handy if, for example, you want to shift your sound stage a tiny bit. Reminds me of the judge that said my sound stage was slightly left of center, even though it was dead center... sigh...