XM1  and XMc1  

The XM-1 is one of our all time favorite Hammond Organs, simply because if its incredible versatility. However it has its drawbacks, the main one is that it has no keys, amp or speakers and so it is only ever going to sound and feel as good as the equipment it is being used with. At least the last 30% of a good Hammond performance is down to the feel of the keyboard!

The XM1 & XMc1 were originally sold as separate items, however it was very rare to sell the XM1 module (this is the bit that produces sound) without the XMc1 controller. The controller of course is no use whatsoever without the XM1. 

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The Hammond XM1 Drawbar Sound Module and XMc1 controller.

XM-1 Specifications    
  • 304mm x 44mm x 241mm
Sound Engine
  • Vase II + DRB system
Drawbar Voice
  • B-type/ Mellow/ Brite
Organ Patch
  • 128
  • 2nd/ 3rd Harmonics
  • Slow Attack, No Click, Soft, Normal, Max
Vibrato & Chorus
  • V1, V2, V3, C1, C2, C3


  • Twin Rotor Digital
  • 10 Presets
Digital Reverb
  • Continuously Variable
  • 4 Programs Room, Live, Hall, Church
  • 16, Characters, 2 lines
  • 3 Part multi-timbre
  • Upper/ Lower/ Pedal
  • A/C Adapter 10V 1A
  • DC Input, Line Out L/R
  • Leslie driver interface connector,
  • Drawbar Controller
  • Footswitch
  • MIDI In/ Out/ Thru
  • Headphone
Edit Function
  • Vibrato
  • Tune
  • Transpose
  • Pitch Bend
  • Percussion
  • Footswitch
  • Drawbar Voice
  • Attack/ Sustain
  • Foldback
  • MIDI


XM-c1 Specifications    
  • 182mm x 48mm x 233mm
  • 9 Pitches (1 Set)
  • Leslie On/ Off (Break)
  • Leslie Slow/ Fast
  • Percussion 2nd
  • Percussion 3rd
  • Vibrato & Chorus
  • V1, V2, V3, C1, C2, C3
  • 5 Presets
  • Drawbar Select; Um, Lm, PK
Rotary Controls
  • Overdrive (percussion level)
  • Volume Control
  • (percussion/ decay)
  • Drawbar Controller Cable (included)

Optional Accessories

Item Description  
XM1 Sound Module  
XMc1 Drawbar Controller  
XEC-1 Serial Extension Cable  
XLD-1 Leslie Driver  
XRM-1 Rackmount Kit For XM-1  
MC-100 Module Clamp  



The XM1 is very reliable, we have never had a genuine fault other than user error or problems caused by misuse. Its worth noting if your XMc1 doesn't work resistor R11 will have blown in the module itself. This is caused by a damaged, incorrect or incorrectly inserted cable and acts as a kind of fuse to protect the units from serious damage. Call us for help if this happens.


The Digital Leslie. an incredibly valuable part of the module, but you must understand it is designed, not to recreate the sound you hear from a real Leslie sitting next to you, but the sound of a miked up, recorded  Leslie.

So here are a few suggestions that might help:

Stereo; A Leslie speaker is not stereo, however it does project the sound in all directions, this 3D sound is difficult to reproduce, but from experience you should not use a stereo amp with speakers placed away from each other. slow Leslie is bearable, however fast Leslie makes your eyes roll as the sound shifts quickly across the room. If you do want to use stereo the best effects for recording are to carefully 'pan' the Leslie to an imaginary point in the recording environment. Picture your recording as a live stage
and imagine where you want your Leslie to appear-and 'pan' the left and right channels to that point. If you are using the module live, move the speakers close together and at 90 degree angles from each other facing your audience, this will give a much more authentic sound.

Your Digital Leslie also has two 'virtual microphones' which you can 'position' at angles and distance from the 'virtual Leslie'. using headphones, play with these settings, imagining the Leslie is in a recording
booth, microphones placed in the corners of the room are not unheard of.

Rise and fall times: These will make or break the sound. Personally I find the factory defaults for the bass rotor way to slow, the first thing I do whenever I get an XM1 to play with is to speed the bass rise time to 3.50 seconds and fall time to 3.00 and the brake time to 7 seconds. This suits my personal taste, however you might like to listen to some recordings and time the bass speaker acceleration/ deceleration. to get it to suit you.

A valve preamp will also help warm the sound of the digital Leslie, or even better a full blown stereo amplifier.

Speaker frequencies and X-over: If the speakers do not handle the bass or carry the high frequencies, this to will make your XM1 sound too thin or too muddy. (fyo the original x-over and speaker specs are 16ohm, 12db per octave, 800hz)

Suggested settings for A100/B3/C3 etc with a 145/147 Leslie
Leslie Leslie Type: #147
L2 Slow Speed
horn rotor 48 rpm
bass rotor 39 rpm
L3 Fast Speed
horn rotor 435 rpm
bass rotor 387 rpm
L4 Rise Time
horn rotor 1.6 s
bass rotor 3.0 s
L5 Fall Time
horn rotor 1.0 s
bass rotor 3.5 s
L6 Brake Time
horn rotor 2.0 s
bass rotor 8.0 s
L7 Vol Balance
horn rotor 0db
bass rotor -1db depending on amplification
L8 Mic Setting
Angle 90o depending on amplification
Distance 0.9m depending on amplification
Global Reverb Level
Hall 1/4 to 1/3
P5 D/B attack
UM/LM soft Click
P7 D/B voicing
B3 type
P10 Percussion
Decay 8
Volume Normal
Touch on
Velocity off
Level 7
P11 Vibrato
Speed Normal
P13 Overdrive 6 depending on amplification
Possible Drawbar setting 888040000 2nd percussion vibrato 1 or Leslie

Technical Support:

Before calling or emailing, we strongly recommend a factory reset of your XM1. Here in the UK, with well over 1000 units sold, to date we have not experienced a single faulty item. (with the exception of user related damage). Of course at some point there is going to be a genuine fault, but until now issues have related to user error or problems with the controller keyboard (note hanging, poor volume etc..)

Owners of this instrument should contact their local Hammond center for technical support and operational enquiries. United Kingdom Hammond Center's may call Hammond Suzuki Europe (UK service dept)  for assistance on 07946 123893 during office hours (GMT) or email uksupport@hammond-organ.com at any time.