How To Service A Leslie Organ Speaker

The captain's model guide

Near this guide
This is a quick guide to Leslie speaker models suited for Hammond organs. This document is meant as a reference for when you are browsing the classifieds or eBay and is not meant to listing every petty detail almost the speakers. Some models are covered elsewhere on this website, often in item and with pictures.

About the background
The background is Leslie finish 'Oak No 20'.

About the roto-sonics
Since most players and technicians, including myself, find the roto-sonic Leslie models less valuable, these are listed in a separate department. Some of these speaker models may exist used equally is, or they tin can be converted into more than Hammond friendly models or simply serve as parts donors for other more valuable Leslie models. Electro Music tended to utilise the same parts in as many applications equally possible, so a skillful many parts from, say, a model 710 may be used to restore a model 122. If you happen to prefer the more theatre organ-like sound of the roto-sonic Leslie speaker, by all means - you are but lucky to similar the more cheap alternative.

Almost the speakers still in product by Hammond-Suzuki
Models 122, 147 and 770 are however in production as model 122A/122XB, 147A and 771/971 respectively. They are updated in the technical design, but the basic functionality is the same equally the vintage speakers. For a while model 145 and 142 were existence produced as 145A and 142A. A vintage speaker in immaculate condition may fetch a college price than a new Leslie, especially for the tube models. If you are a church or a professional person business organisation, consider investing in a new Leslie from a local dealer that will support you. Quondam cabinets often don't come with a warranty or a service organisation, and Mr. <insert name here> from iii towns over will most likely non help you with a replacement Leslie for Sunday service, because the 1971 Leslie he sold yous broke downwardly at band practise Saturday afternoon. If you are looking for a dealer of new Leslie speakers, a few of them are listed in the links section of this website.

About cable interfaces
The different cable interfaces are discussed in item in Uncle Harvey's Guide to Leslie pin-outs where I also got the unlike designations (6H, 6W and and then on). Much has been said and written almost cable interfaces for Leslies over the years. Captain Foldback has this to share:
Don't let thoughts on cable interfaces scare you lot out of buying a good Leslie - whatsoever Leslie can exist hooked up to whatever organ. That existence said, if you have an existing setup and would like to augment the sound with another Leslie, selecting a cabinet with the same cable interface as the 1 you lot have, will salve some fourth dimension and trouble.

Tube models, 2-speed
The standard Leslies that everybody know and everybody want

Model	Interface	Height (inches)	Notes
122, 122R, 122RV, 122V	6H	41	The almost valuble of all models, the official B-3 Leslie for virtually people
147, 147RV	6W	41	Almost as valuble as model 122
145	6W	33	Nearly as valuble every bit model 147
142	6H	33	May cost the same as model 147
251	6C	41	ii-channel, same toll range as model 142
125	6W	33	Bottom rotor only with a 12" full range speaker. Relatively cheap, 20W amplifier. Early on versions of model 125 used the amplifier from its predecessor model 25 (see below). Later on model 125 cabinets are marked 'Leslie 125'. In both cases the speaker could be obtained without an amplifier for apply with spinet organs (speaker was powered by the organ'south own amplifier). Model 120, 110 and 113 are all similar to model 125 but has a simpler cabinet and no amplifier.

Tube models, 2-speed, decorator-style cabinet
The drawing room versions of the above models, with (almost) the same innards

Model	Interface	Height (inches)	Notes
222, 222RV	6H	27	Depression male child version of 122/122RV, in a unlike price range (lower) than the 122. Good for parts.
247, 247RV	6W	27	Meet in a higher place
245	6W	33	Here is a potentially skilful bargain. The 245 sounds and works like a 145. If yous can stand up the looks of it, it's a swell way to get a Leslie.
242	6H	33	Another good deal, potentially. Same cabinet as model 245 - i.e. a 'decorator' style 33" chiffonier.
351	6C	27	Another 'decorator' Leslie. Good for the living room A-100 organ or for parts.
225	6W	21	Maybe the least sought after tube ii-speed model. Skillful for some parts, or equally an entry level speaker. This is a 'decorator' version of model 125. Best suited for spinet-sized organs. The 20W amplifier was optional.

Solid land models, three-speed (fast/tiresome/off)
If it doesn't have to be tube, check out these models. Pro-line road-friendly chiffonier unless otherwise stated.

Model	Interface	Height (inches)	Notes
760	ix	41	Great speaker, bully value for money. 90W amplifier.
330	11	33	Another great speaker, slightly less powerfull than the 760. A solid state version of model 145.
860	11	25	Ultra-compact but quite loud due to a 120W amplifier. Great for guitar, less great for playing pedal bass.
900	ix	59	Will probably demand some piece of work, but sounds great. 2-slice chiffonier.
910	nine	59	Another interesting Leslie hither. two-slice Pro-line cabinet. Same specs equally model 900.
925	9	59	One of the finest Leslie speakers ever designed. 2-slice Pro-line cabinet.
825	9	33	Only has the bottom rotor. Adept entry-level speaker.
820	xi	33	Same as to a higher place.
770	9	41	Same as model 760 but in a 41" forest cabinet like model 122 and 147.
771	eleven	41	Updated version of model 770, produced past Hammond-Suzuki from near 1991. In 2006, the fifty-fifty more than powerful (300W) model 971 was introduced.
130	11	33	Special model in a decorator style cabinet with standard bottom rotor like in model 825/820 and a stationary treble speaker. Good for parts.

Tube models, 1-speed, permanent magnet bass
These speakers were in production from about 1958 until 1963

Model	Interface	Height (inches)	Notes
22H, 22R	6H	41	Single speed version of model 122. A nifty speaker.
47	6W	41	Single speed version of model 147.
45	6W	33	"Shorty" version of model 47. Was bachelor without the amplifer.
51/51C	6C	41	2-channel. Same bones speaker as model 251 only unmarried speed.
25	6W	33	Single speed predecessor of model 125. Was available without the amplifier.
Annotation: Amplifers marked model 22H, 47 and 51C exist in two versions: One with a tube rectifier and a after with solid state rectifiers

Tube models, i-speed, field-coil (electro magnet) bass
All of these models were produced before 1958

Model	Interface	Height (inches)	Notes Any model in this table will exist at least 50 years old, if not older, so unless it was recently rebuilt it will demand some work.
31H	6H	threescore	The tall boy. Great sound, especially for jazz. The most sought after of this blazon is the later on version with Serial Three amplifier and the Jensen bass speaker. Cabinets with serial numbers below 5200 were originally fabricated with an older version of tremolo control, however, many units were upgraded to the current arrangement by Electro Music.
31A	6H	60	Mid-1940'south predecessor to model 31H. Rare.
31W	Early: Non standard Subsequently: 6W	threescore	Same speaker as 31H with a dissimilar amplifier made to interface with Wurlitzer organs. Early on cabinets of this model had a 'broad torso' amplifier with a non-standard hookup and permanently attached power cord. Later 31W speakers had the 30 watt 46W amplifier
21H	6H	41	Another corking speaker for jazz. Came with 2 different amplifiers: A 20W and the more desirable 30W.
46W	6W	41	Same speaker as model 21H but with the 30 watt 46W amplifier (aforementioned amplifier as institute in after model 31W speakers)
44W	6W	33	'Shorty' version of the 46W/21H concept, with a 20W amplifier.
50C	6C	41	Two channel speaker. The first pattern with 6550 output tubes.

Solid state, roto-sonic

Model	Interface	Tiptop (inches)	Notes
710	9	41	Aforementioned dimensions as a model 122. Two channels - ane rotary and 1 stationary. May be converted to work as a model 770 with donor parts, or an electronic crossover can be added to convert the speaker to single aqueduct use. Entire upper section is exactly the same as in a model 122/147/770. Some 1970's vintage Hammond organs take a built-in interface for this blazon of speaker.
700	9	33	Cheaper version of model 710, without the horn, in a 'decorator' style cabinet. Not actually suited for Hammond organs although it will work with the T-500 spinet and a few solid state models that followed.
610 (Tube amp)	9	41	Dual roto-sonic drum speaker. Was paired with the model R-100 Hammond organ for a more theatre organ-like sound. May likewise be used with the older H-100 organ. Leslie model 205 is like just has a different cabinet.
HL-722/HL-822	xi	41	Same concept equally model 710 with updated technology. The bass channel is derived. Model 715 and 815 are variants of the same speaker in different cabinets. Other similar models are HL-422 and 415.
720	11	41	Somewhat of a speciality - the 720 does non have a roto-sonic speaker, but instead has a 10" speaker with a rotor much similar in a traditional Leslie. The deepest bass tones are handled by a 15" speaker. Model 720 may be converted to single channel operation (stock configuration is ii- aqueduct) so it will piece of work with a Hammond organ. Cabinet is dissimilar in appearance than other Leslie models.
600	9 non-standard	27	'Low male child' or 'decorator' type speaker, 4 channels, 'space generator' reverb.
750	11	41	iv-aqueduct speaker similar to model HL-722.

Models to be careful near

The models below are ones to be careful of - they look like like models suitable for Hammond organs,just their pattern makes them incompatible (at least for almost uses). Most of these have parts that will work in other, more valuable, models so if y'all can become them for a song....

Model	Interface	Tiptop (inches)	Notes
120C	6W	33	Passive Leslie without amp. Looks exactly like model 120 but has a different rotor blueprint that is unsuited for Hammond organs.
112	6W	33	Passive Leslie without amp. Looks exactly like model 110 merely its rotor design makes information technology unsuited for Hammond organs. Originally designed for the reed/complex voice aqueduct of Gulbransen organs.
114	6W	33	Same as model 112 with a different cabinet cease.
830	9	33	Looks like model 825. Has reverb and a different rotor design for complex voice instruments such every bit a Cordovox.
55C	6C	41	Special speaker made for certain models of Conn organs. Not suited for Hammonds. Some parts may exist used in other models.
100GK	9 non-standard	41	Dual roto-sonic pulsate model fabricated for Gulbransen organs. Other models in the series are the 101, 102 and 103.
520	11	33	Looks like model 720 but has no rotating parts.

How To Service A Leslie Organ Speaker,

Source: http://www.captain-foldback.com/Leslie_sub/leslie_model_guide.htm

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