Seas L18RNX drop in replacement for Dayton RS180?

[ts]

I have damaged one of my daytons and would like to upgrade woofers to Seas L18rnx. I have this crossover which is made for the dayton rs180 and my Seas 29TAF/W and the Seas seems to have a similar response curve so I was wondering if I can just drop in the seas?

If not what do I need to change in the crossover?

The speaker is in a .5 cubic foot sealed enclosure and only plays from 65hz up.

[ts]

Here is the crossover

<A HREF="http://http//i6.tinypic.com/1z31jie.jpg">http://http//i6.tinypic.com/1z31jie.jpg</A>

[ts]

Here is the crossover. I suck at internet

http//i6.tinypic.com/1z31jie.jpg

[bryanjackson]

Question: Since when is the L18 an upgrade from the RS180?

To quote Mark K
"Anyway, breaking it down, the RS180 is marginally better than the L18 on the spectral distortion test, but maybe marginally worse on the 80 Hz HD test. So, below 100 Hz, these two drivers are more or less tied. The nonlinear distortion testing above 100 Hz favors the RS180, because of its more advanced motor construction. On the other hand, the FR response is just smoother, and thus, all the linear distortion numbers are the same or favor the L18, though it is very close."

If anything they are tied, however, I'd take lower distortion of the cheaper RS180 anyday, personally.

[ts]

> Question: Since when is the L18 an upgrade
> from the RS180?

> To quote Mark K
> "Anyway, breaking it down, the RS180 is
> marginally better than the L18 on the
> spectral distortion test, but maybe
> marginally worse on the 80 Hz HD test. So,
> below 100 Hz, these two drivers are more or
> less tied. The nonlinear distortion testing
> above 100 Hz favors the RS180, because of
> its more advanced motor construction. On the
> other hand, the FR response is just
> smoother, and thus, all the linear
> distortion numbers are the same or favor the
> L18, though it is very close."

> If anything they are tied, however, I'd take
> lower distortion of the cheaper RS180
> anyday, personally.

I considering the Seas or even Peerless Exclusive mostly for asthetic reasons. They daytons sound great but I have Aluminum TB cones in my center and surrounds which match my aluminum colored LCD and those two woofer match the asthetics of my speakers/flatpanel. I know not the most audiophile based reasoning but I get OCDish about these things.

[curt_c]

Unfortunately your crossover pic doesn't come up.

While the RS and L18 are very close, there are enough differences in response that it will likely not be a drop in replacement. Depending on the existing Xo, and how it dealt with the break up modes, it will possibly be within tweaking distance, but may require measurements to optimize.

C

[ts]

> Unfortunately your crossover pic doesn't
> come up.

> While the RS and L18 are very close, there
> are enough differences in response that it
> will likely not be a drop in replacement.
> Depending on the existing Xo, and how it
> dealt with the break up modes, it will
> possibly be within tweaking distance, but
> may require measurements to optimize.

> C

Here is the crossover

http//i6.tinypic.com/1z31jie.jpg

[ts]

[curt_c]

You might have to fuss with the notch filter and tweeter attenuation, but other than that its pretty hard to guess without measurements. Otherwise, IMO, all you can do is try it and see how it sounds...

C

[ts]

> You might have to fuss with the notch filter
> and tweeter attenuation, but other than that
> its pretty hard to guess without
> measurements. Otherwise, IMO, all you can do
> is try it and see how it sounds...

> C

Does anyone have any software that could make a crossover for the Seas l18/29TAF or Peerless exclusive 7 /Seas 29TAF?

Is there any freeware out?

[curt_c]

> Does anyone have any software that could
> make a crossover for the Seas l18/29TAF or
> Peerless exclusive 7 /Seas 29TAF?

> Is there any freeware out?

You are familiar with SW, I saw from the crossover pic. The other good freeware is Jeff Bagby's PCD available over on the FRD Consortium.

In any case, the real trick would be obtaining the driver measurements on your intended baffle, as the diffraction effects will have a significant effect on the resultant responses. Using the BDS and FRC, also available over at the FRD Consortium, you can come very close, using the manufacturer’s anechoic plots, however.

C

[ts]

> You are familiar with SW, I saw from the
> crossover pic. The other good freeware is
> Jeff Bagby's PCD available over on the FRD
> Consortium.

> In any case, the real trick would be
> obtaining the driver measurements on your
> intended baffle, as the diffraction effects
> will have a significant effect on the
> resultant responses. Using the BDS and FRC,
> also available over at the FRD Consortium,
> you can come very close, using the
> manufacturer’s anechoic plots, however.

> C

Im actually not familiar with speaker workshop, that schematic was made for me by Roman of the Madisound boards. I will however look into those programs.