[HAM] Leslie transplant question

[David Anderson]

Hi John,

The 45 has two rows of louvers on top, so the treble may sound different.

As for bass, a larger enclosure does generally lower the roll-off point, but there is also the issue of bass speed. It takes longer to put a larger volume of air in motion, which is probably why some people say the 44W/45/145 size cabinet has "punchier" bass.

I have also performed the 'rap' test on both the smaller and larger Leslies. That's where you rap on the side to see how well damped the speaker enclosure is. The smaller cabinets are more "dead" in this respect than the larger ones due, of course to the distance between the shelves. A longer cabinet wall will have more flex. How much this effects the Leslie sound, I'm not sure.

I like my 44W cabinet with 32H amp in it :-) It has perceptibly more bass authority than my 142 with the Utah Ceramic woofer. Speaker efficiency trumps Watts every time.

David A.

-----Original Message-----
>From: John Brevik <jbrevik at csulb.edu>
>Sent: May 3, 2007 1:09 PM
>To: The Hammond Forum <hammond at zeni.net>
>Subject: [HAM] Leslie transplant question
>
>
>Hi, list,
>
>I have a 21h, and I'd like to move the guts into a 45-style cabinet.  
>Any good reason why I couldn't? How about shouldn't? There's some  
>debate as to whether the bass response is as good in the smaller  
>cabinet, but the EM speaker really delivers the goods down there  
>anyway, and I know folks are generally enthusiastic about the 44w  
>bass output.
>
>Thanks to all,
>
>John