Organ Speaker - WTF?

rskarvan

I saw this on e-bay and was confused. Why would someone want to give their woofers a whirl?

avguytx

I've seen that done on some of those old organ cabinets. Kind of a wild twist, huh?

beardog03

major reverb effect ?!!

that`s weird

George Grand

I don't think that's a Leslie speaker. I thought those were twirling horns for the Hammond B-3 or Farfisa organs.

heiney9

It could be similar to the Leslie speaker perhaps for a different application. The Leslie speaker's most famous application is when Jimmy Page used it to record Whole Lotta Love. The spaced out part of the song was recorded using a Leslie speaker in the studio.

Dennis Gardner

Most likely a cabinet from the Allen organ company. Leslie had patents for the rotating horn that Allen didn't want to pay for, thus this was their work around.

Hammond and Rodgers did use the Leslie design for years.

sda2mike

heiney9 wrote: »

It could be similar to the Leslie speaker perhaps for a different application. The Leslie speaker's most famous application is when Jimmy Page used it to record Whole Lotta Love. The spaced out part of the song was recorded using a Leslie speaker in the studio.

also on darkside of the moon, on the cut 'any colour you like', gilmour's guitar is fed thru a leslie. of course, you can hear the leslie anytime a b3 is featured.

unc2701

Cool beastie boys leslie footage here starting at around 2:00 mark- you really hear the effect around 2:15.

http://www.youtube.com/watch?v=q6UXqjYzrOI

mhardy6647

Listen to the song "Rosemary" on the Grateful Dead's aoxomoxoa and you'll hear Garcia's vocals through a Leslie.

PeteTy

It looks like a far better design than a leslie.

the entire box acts as a baffle for all the speakers

leslie has basicly an unbaffled rotating speaker.

unbaffled speakers are usless for any sort of low notes.

The other decent design is a rotating horn over a mounted infinate baffle speaker.

the physical acustic doppler effect is unlike anything electronics can do.

still you dont get the resonant column of the air in a real organ pipe where you have acoustic nodal resonance all through the room

mhardy6647

unbaffled speakers are usless for any sort of low notes.

Not necessarily. Depends on the size of the baffle and the Qts of the driver.

PeteTy

unbaffled speaker(driver) is what is known as free air resonance the most efficient( mass / spring ) point of the driver chances are if it were in a vacuum it would be the same.

it will move some air but very little at this point. the baffle adds mass of the air to the system which lowers the frequency.

If you look at wavelength and make a baffle 1' in diameter (washer) you will find the sound can go the two feet from front to back in 2milliSec this makes 500hz the lowest you can go with a 1' baffle .

a 2' diameter washer gives you 4' of travel 125hz

the speaker cabinet in the picture is perhaps close to a 3'diameter washer or about 60hz

leslie has a 6" speaker and a steel weight on either end of a yardstick with a pivot in the middle (2yardsticks actually)

if you throw away the steel yardsticks and substitute a sonotube or schedule10 pvc... keep the counterweight you can make the leslie work to perhaps 60 hz .

i did this to my hammond/leslie friends who tried it had to have it done to theirs. the handy ones do it themselves, the notso handy ones you can pick up a quick $50

the speaker cabinet above could be improved by making it deeper or enclosing the back and adding foam... making the baffle larger more fron to back travel time.

ever wonder why tweeters are solid rather than a spider?

ever wonder why a vhf antenna is about 6' and a uhf 6" ?

wavelength is the top secret, highly technical, rocket science, answer

mrbigbluelight

PeteTy wrote: »

unbaffled speaker(driver) is what is known as free air resonance the most efficient( mass / spring ) point of the driver chances are if it were in a vacuum it would be the same.

it will move some air but very little at this point. the baffle adds mass of the air to the system which lowers the frequency.

If you look at wavelength and make a baffle 1' in diameter (washer) you will find the sound can go the two feet from front to back in 2milliSec this makes 500hz the lowest you can go with a 1' baffle .

a 2' diameter washer gives you 4' of travel 125hz

the speaker cabinet in the picture is perhaps close to a 3'diameter washer or about 60hz

leslie has a 6" speaker and a steel weight on either end of a yardstick with a pivot in the middle (2yardsticks actually)

if you throw away the steel yardsticks and substitute a sonotube or schedule10 pvc... keep the counterweight you can make the leslie work to perhaps 60 hz .

i did this to my hammond/leslie friends who tried it had to have it done to theirs. the handy ones do it themselves, the notso handy ones you can pick up a quick $50

the speaker cabinet above could be improved by making it deeper or enclosing the back and adding foam... making the baffle larger more fron to back travel time.

ever wonder why tweeters are solid rather than a spider?

ever wonder why a vhf antenna is about 6' and a uhf 6" ?

wavelength is the top secret, highly technical, rocket science, answer

Yeah. What PeteTY said.




Welcome, PeteTY. Keep posting.

PeteTy

mhardy6647 wrote: »

Not necessarily. Depends on the size of the baffle and the Qts of the driver.

how can the size of the baffle effect the unbaffled speaker????

I must have used the wrong word... nevermind