From drjoho@swbell.net Fri Aug 20 07:23:18 2004
Subject:Re: switched to the XK3?portable Leslie 21?

Yes, but to be more accurate, cabinet or enclosure design matters.
And enclosure design is directly related to the speaker used. For
example, if the speaker is stiff (or not very flexible) it will get its
native frequency response with a smaller enclosure. If a speaker
is loose it will require a larger enclosure. Another factor is tuning
or porting the enclosure whereby you can get more bass response
with a smaller enclosure.

The bottom line is that it is a complicated equation. What started this
was the statement by Tony Cat that the Pro-145 only goes down to
100Hz. First, my ears tell me this is incorrect as I don't hear a pronounced
fall off when using bass pedals with my XK-3 and the Pro-145. Also,
knowing John Fisher I don't think that he would design an enclosure that
would not take advantage of the frequency response of the speaker used.

I will ask John if they have measured the freq response of the Pro-145
and see what they found.

Dr Joho

> --- In CloneWheel@yahoogroups.com, "Josiah Hoskins"
> wrote:
> > Tony Cat,
> >
> > Where did you get the data that the Pro-145 only goes to 100Hz?
> >
> > The Jensen C15K that is used in the Leslie 122 and 147 has a usable
> > frequency response of 50Hz to 4k.
> >
> > The Eminence Delta 12 used in the MS Pro-145 has a usable
> frequency response
> > of 55Hz to 5k.
> >
> > If you want more bass Motion Sound recommends the Eminence Delta
> 12LF (a
> > drop in replacement) which has a usable frequency response of 45Hz
> to 3k.
> >
> > So, what are the key issues to the bass response?
>
> When it comes to bass cabinets, size matters.
>
> -OF
>
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