SECTION 1. Speaker Model & Accessories




Section 1.

Speaker Model & Accessories

General Application Model Hammond Only Amplifier description
120 No Amp
125 20 Watts
225 20 Watts
145 142 40 Watts
147 122 40 Wats
147RV 122RV 40 Watts main, 15 Watts reverb
247 222 40 Watts
247RV 222RV 40 Watts main, 15 Watts reverb
Models which are lined together have identical cabinets and differ only in amplifier.


Two channel - 40 Watts main rotary. 15 Watts 'straight' secondary


Combo Pre-Amp For use with models 145 & 147
Combo Pre-Amp II For use with models 825 & 760
De-lux Combo Pre-Amp For use with models 900
022186 Brake. For models 125, 225, 145, 147, 147RV, 247, 247RV, 251, 351
034256 Brake. For models  142, 122, 122RV, 222, 222RV
034488 Power Relay - to connect 251 to 351 cabinets in tandem.
034496 Power Relay for multiple 125, 225, 145, 147, 147RV, 247, 247RV, 142, 122, 122RV, 222, 222RV installations
021709 Power Relay for multiple 925, 900 installations.
015255 Remote Reverb control (all models)



• MODELS 142 122 122RV 222 222RV.

Designed for exclusive Hammond usage (Tonewheel Organs). Model 142 will handle the full range of Spinet Organs. For larger console organs, models 122, 122RV, 222 and 222RV are desirable. These models are suitable for all Hammond organs except 'VS' 'J' and 'N' Series. The amplifier in these cabinets matches the output signal of Hammond Tonewheel Organs. With Hammond Models 'L' 'M' 'T' and 'E' these cabinets matches the output signal or Hammond Models (A100, C.3, B.3, RT.3, D100, Hl00, X.66 necessitates the use of this type of cabinet.

• MODELS 120 125 225 145 147 147RV 247 247RV

These models have general organ application. Are suitable for use with any Hammond up to and including model E100 (including 'VS' 'J' and 'N' series), see previous section. For models Al00 and above - Hammond type cabinet is necessary. Models in this group are suitable for all other makes of organ. Models 120, 125, 225 and 145 will handle the full range or a spinet Organ. Models 147, 147RV, 247 and 247RV are desirable for use with a larger console organ (full pedalboard, 61 note manuals).It is true to say, however, that models 147, 147RV, 247 and 247RV give a far richer sound on a Spinet Organ and many organists prefer this installation.

RV Models

RV models incorporate a separate reverb. amplifier (15 watts) and a reverb. speaker. Lowboy RV models have two reverb. speakers. Reverb. cabinet is only necessary with twin-channel organs, and gives a straight reverberated signal. With single-channel organs reverb comes through to the cabinet from the console and is controllable from the console. The reverb cabinet have Spinet type reverberation units which give a straight reverb signal, probably more suited to straight or classical music whereas a non-reverb cabinet taking its reverb. signal from the console develops "spinning reverb" which is more suited to popular music. When a reverb. cabinet is used on a single-channel console the organist has the choice or either "straight" or "spinning" reverb, or both together.

• MODELS 251 & 351.

These are two-channel Leslies and are recommended for Hammond M100, E100 and A100 organs. If a single-channel Leslie is fitted to these organs, normally the reverb. signal would stay in the console. By using either model 251 or 351 the second (straight) channel tarries the reverberated signal from the organs This means that the main organ signal is handled by the rotary channel in the Leslie and the signal from the reverb amp in these organs is handled by the straight secondary channel. Modelss 251 and 35l are also recommended for certain Conn and Baldwin organs. With Conn and Baldwin, flutes and tibias are through the Leslie which is built in to the console and strings and reeds are straight signal, which gives a theatre effect. When models 251 and 351 are used with Conn and Balduin the flute and tibia sections go through the rotary channel and strings and reeds go through the "straight" secondary channel and gives an effect which is an extension or the normal function of the organ.

M0DELS 825, 760 and 900,

Portable and designed for group or travelling musicians. Solid state amplifiers. Suitable for use with most Hammond models, and connector kits so far have been developed for certain models Lowrey, Thomas and Wurlitzer organs.

Model 625 has a single rotor and extended range speaker. The rate of 1pick-up' to maximum rotor speed is relatively slow and compares with models 120 and 125. models 760 and 900 have treble horns and therefore the rate of 1pick-up to maximum rotor speed is fast and compares with models 145 and 147. models 625, 760 and 900 have a brake circuit incorporated, which brings the rotors to a complete stop.

Models 625 and 760 do not have a reverb. unit in the cabinet, so reverb will only be available when these cabinets are fitted to a single-channel organ. Model 900 has its own reverb, generator and so produces it's own reverberation. When model 90u is connected to a single-channel organ which has reverb, e.g. Hammond model 'L' or 'T', the organist has a choice of '1straight" or "spinnlng11 reverb, or both together.


Combo Pre-amps. 

Three different pre-amps are available.

• The de-luxe combo pro-amp is used with the model 900.
• The combo pro-amp II connects to models 825 and 760.
• The standard combo pro-amp connects to models 145, 147 and 147RV.

These are high gain pro-amps that match the output of most combo organs and guitars to the input circuit of Leslie Speakers. The Leslie combo pro-amps have jacks with two separate volume controls - so you can hook up a single channel combo organ and a guitar, or a two channel organ, or two guitars. They are chrome plated and operate with foot controls including a power on-off switch with an easy to see pilot light, tremolo speed control and slow speed control (for chorale effects). There are no fuses to fool with - these pro-amps come with built-in circuit breakers. In addition to the features above, the combo pre-amp II and de-luxe combo pre-amp have a foot control position to turn the rotors 11on11 and 11off11. The de-luxe combo pre-amp also incorporates a foot switch to turn the reverb. "on" and "off".

Power Relays. For use with Leslie cabinets as detailed. Connect Leslie cabinets in tandem. To add a second Leslie cabinet to an Installation the power relay plugs into the first cabinet and the cable from the second cabinet plugs into the power relay. Takes its power from an independent source.
Remote Reverb Control. For use with RV cabinets. Incorporates a control which fits on the console. Tie technique is to set the reverberation control in the cabinet to the maximum required level, then the actual amount of reverb. can be controlled from the console up to this maximum.



Each cabinet is supplied at a price which is inclusive of a connector kit of the dealer's choice.
Connector kits for models 142, 122, 122RV, 222, 222R\1 (Hammond Leslies) are not inter-changeable and it is necessary for a dealer to have the correct kit for attaching the Leslie to a Hammond Organ. models 251 and 351 use the same connector kit for Hammond models M100, E100 and A.100, namely the 8253 kit. Other kits are supplied for Conn and Baldwin organs although some of these organs are already kitted to take a Leslie and the cabinet plugs in without the use of a connector kit.
Connector kits for models 825 and 900. The kits for models 825 and 900 are basically the same, the difference being that the 900 kit handles reverb. Therefore, model 825 will, in fact, function when plugged into a 900 connector kit but will not use reverb control. model 900, however, should not be plugged into an 825 kit, Leslie model 760 uses the same connector kits as model 825. For connector kit numbers, see separate sheet.

LESLIE CABINETS MODEL 120 125 225 145 147 147RV 247 247RV

In America the use of one connector kit in this section to a named model organ. any of these cabinets to Hammond models will connect any of the cabinets For example, 7274 kit will connect T,100, T,200 or T.400.

In this Country (UK), however, models 120, 125 and 225 use 230 volt relays and models 145, 147, 147RV, 247 and 247RV use 115 volt relays. It is therefore necessary to use a different connector kit for these cabinets. For example, Leslie 145, 147, 147R\!, 247 or 247RU to Hammond T,l00, T.200 and T.400 organs would use kit no. 9274.

The only difference between the 7274 and 9274 kits is that the 9274 kit has a step-down transformer on the console connector which reduces the feed 4;o the relay from 230 to 115 volts, It is therefore imperative that the correct recommended connector kit is used because if model 145 were connected to an organ by the use of the 7274 kit the relay would simply burn out.

Approaches have been made to Electro Music to standardise all relays at 230 volts and we are awaiting information as to whether this is possible. If this is, in fact, done we should be able to use one connector kit for this full range of Leslie as is the case in America, instead of the current two.



There are two types of Five Station Control Centres.

1. The 'General' Control Centre which takes the following Leslie models:-

                    120 125 225 145 147 147RV 247 247RV

Any five of these Leslie cabinets will plug straight into the Control Centre. However, due to the fact that cabinet models 145, 147, 147RV, 247, 247RV incorporate 115 volt relay, it is necessary to use a reducing adaptor each time one of these models is plugged in. Two of these adaptors have been supplied to each dealer having the General Control Centre.
The fitting of the Control Centre involves only the use of the normal five wire adaptor supplied with a Leslie kit. The Control Centre then plugs directly in and is usable with any five Leslies in this group. To achieve best results it is recommended that dealers equip probably three organs with the necessary adaptor and then he has the facility of demonstrating any of five Leslies on any one of three different organs.

2. The 'Hammond' only Control Centre. This unit is more restricted in its use and takes the following models of Leslie Speaker:-

                    142 122 122RV 222 222RV

Please note that cabinets are not inter-changeable on Control Centres. For example, model 122 will not function on the General Control Centre and model 147 will not function on the Hammond Control Centre.

Models 251 and 351, 825, 760 and 900 will not function on any Control Centre and have to be connected to organs by means of the normal recommended connector kit.

December 1971