From ted@speakeasyvintagemusic.com Mon Nov 05 12:35:31 2007
Subject:Re: Another crazy Leslie idea?

Hammonds will send around 16" to 2" wave lengths from the upper horn
which would make resonance and boost a pitch. That would make the half
wave around 8" to 1", and that's where cancellations might occur....

I wonder if it's a matter of that, or more likely that the 770 has more
indirect projection which would tend to attenuate highs in an
inconsistent manner as related to pitch (ie higher frequencies
attenuated more then lower ones).

Of course all of this would go out the window if you are listening to
the "back" of the Leslie with the upper cover off...

Cheers!

Ted Thompson
General Manager - Speakeasy Vintage Music

* * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* PH: 717.292.0814 *
* Main Site: http://www.speakeasyvintagemusic.com *
* Media Site: http://media.speakeasyvintagemusic.com *
* Support: http://support.speakeasyvintagemusic.com *
* MOSweb: http://www.mosweb.com *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * *

ghvc1 wrote:
> I think there IS a louver factor involved. The louvers if you tap
> them produce and nice tone. My theory is that these louvers resonate
> in addition to the tone cabinet enhancing the tone. I have heard a
> 760 and a 770 which have the same guts (no tube amp) but the 770
> sounds different to me and it has the louvers. I have subscribed to
> this louver theory for some time but it's not factual based just
> observation based. I like the 760 for playing out because of the
> casters and handles and 90 watts bi-amped but prefer the 122 for
> studio recording.
>
> --- In CloneWheel@yahoogroups.com, Joost wrote:
>> There is a differance but didn't test it yet
>>
>> goffmac747@... schreef:
>>>
>>> Perhaps. I read somewhere long ago that the louvers on a leslie
> have a
>>> phase correlation to the sound going thru them. I don't know if it's
>>> true. Perhaps others can shed light on this. Has something to do with
>>> the the way they are shaped.. If you use a venetian blind type of
>>> effect I don't know if that would have an effect or not because those
>>> would be flat shingles instead of convoluted passage ways.. I do know
>>> that the sound coming out of louvers is different from the sound
>>> coming off the back with the covers removed. So what is the true
>>> leslie sound? The rotors straight out the back? Or thru the louvers?
>>>
>>> -----Original Message-----
>>> From: Joost >
>>> To: CloneWheel@yahoogroups.com
>>> Sent: Fri, 2 Nov 2007 3:50 am
>>> Subject: Re: [CWSG] Re: Another crazy Leslie idea?
>>>
>>> I have a nice idea;
>>>
>>> louvers which can be adjusted "closed to wide open" like those for
>>> windows of a house.... :-)
>>>
>>> Ted Thompson schreef:
>>>> Bear in mind that the first Leslie™ horns were made of Paper
> Mache,
>>>> glued into a block of wood in the center. I've only seen a few,
> and I
>>>> can't recall if they had the exponential looking flair of the later
>>>> plastic ones or not.
>>>>
>>>> Also, early cabinets had 1 slot (louver) and some at least had a
> layer
>>>> of sound absorbing material stapled in behind that opening and
> on the
>>>> inside of the upper back.
>>>>
>>>> "The Sound" has been constantly evolving.
>>>>
>>>> Cheers!
>>>>
>>>> Ted Thompson
>>>> General Manager - Speakeasy Vintage Music
>>>>
>>>> * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
>>>> * PH: 717.292.0814 *
>>>> * Main Site: http://www.speakeasyvintagemusic.com
>>> *
>>>> * Media Site: http://media.speakeasyvintagemusic.com
>>> *
>>>> * Support: http://support.speakeasyvintagemusic.com
>>> *
>>>> * MOSweb: http://www.mosweb.com *
>>>> * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
>>>>
>>>> rrockkey wrote:
>>>>
>>>>> I wasn't gonna say any thing, but you gotta be a little goofy to be
>>>>> getting into this spinning speaker stuff in the first place: )
>>>>>
>>>>> I have a nearly destroyed horn that I mended with very stiff
> art board
>>>>> of which my wife has extra lying around. I cut it to size(what
> does a
>>>>> cone look like if you could "unroll it flat"?) then glued it on the
>>>>> stub of what was left of the horn. I could have done the same with
>>>>> layers of wood veneer for a wood horn but I didn't think of it.
> Maybe
>>>>> next time. What does it sound like? Not much different than the
>>>>> baklite one in my 145 (both without deflectors). Yeah, I know I
> should
>>>>> get new horns with the deflectors but I'm in no hurry.
>>>>>
>>>>> Got any other crazy ideas? If you don't try it you'll never know.
>>>>>
>>>>> Cheers,
>>>>> Rock
>>>>>
>>>>> To unsubscribe, send email to:
>>> CloneWheel-unsubscribe@yahoogroups.com
>>>
>>>>> Yahoo! Groups Links
>>>>>
>>>>
>>>> [Non-text portions of this message have been removed]