Time alignment circuit?

[Bad silver]

Hi, I am making some kick panels + I am going to install 8’’ woofers in my doors. I am thinking about building a time alignment circuit for 3-way active front stage. Does anyone have any reference that I can look at? I have never built anything like that, so I will probably need A LOT of help with this...

[richie00boy]

Have a look at Linkwitz site, the all-pass network. Probably better just getting a DSP unit though as it's much better done digitally.

[Bad silver]

The problem comes down to this:

I will place one extra set of soft tweets on the dash crossed @ 3Khz and I need to delay one, driver's-side tweeter to compensate for 0.5m path difference.


If I link 11 of these units together on the tweeter's pre-out line, will it do the job?





(0.5m) / (340.29m/s) = 0.001469 s
(0.001469s) / (128us) = 11

[Perry Babin]

If sound quality is a priority, you wouldn't want 11 op-amps in series. Even if you use the best op-amps, it would still be noisy.

Then you have to build a power supply. If the power supply doesn't have a floating secondary, you'd have to build a noise cancelling input circuit. All of this is doable but certainly not trivial.

As was suggested, buy something that has this capability.

[Bad silver]

Thanks for the advise!

The point is, if you want high-end, just go unbalanced