Alesis V49 Size: What to Know
Updated Nov 13, 2026 · By 
Jonah Mercer · Editorial policy
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The Alesis V49 is a 49-key MIDI keyboard controller, so its size comes from the key count and the controls around the keys. The 49-key controllers here measure 32.26 inches wide and 31.69 inches wide, so check the width and depth in the listing against the desk space before you buy.
What 49 keys means for width
The width of a MIDI keyboard comes from the keys across it. The 49-key controllers here measure 32.26 inches wide for the Keystation 49 and 31.69 inches wide for the Launchkey 49. A 37-key controller measures less across: the MPK Mini Plus is 17.9 inches wide. A 25-key controller is narrower still: the MPK Mini IV is 13.88 inches wide. Compare the width figure in the listing with the desk space, since the key count sets the width.
Depth, height and weight
Width is not the whole size. The Keystation 49 measures 7.44 inches deep and 2.68 inches high and weighs 4.9 lb. The Launchkey 49 measures 14.76 inches deep and 6.1 inches high and weighs 9 lb, with 16 pads and 9 faders in front of the keys. The MPK Mini IV measures 7.56 inches deep and 1.44 inches high and weighs 2.2 lb. The MPK Mini Plus measures 7.1 inches deep and 2 inches high and weighs 2.9 lb. Check each measure, not just the width.
Measure the desk before you buy
Measure the desk width and depth, then compare those measures with the width and depth in the listing. Leave room for the cables at the back. If the controller moves between the desk and a bag, check the weight in the listing too: the Keystation 49 weighs 4.9 lb, the MPK Mini IV weighs 2.2 lb, the Launchkey 49 weighs 9 lb and the MPK Mini Plus weighs 2.9 lb.
Key count, pads and controls
Keys are not the only parts that take space. The Launchkey 49 adds 16 pads and 9 faders, and it measures 14.76 inches deep. The MPK Mini IV adds 8 pads and 8 knobs, and the MPK Mini Plus adds 8 pads, 8 knobs and a 64-step sequencer. The Keystation 49 adds a volume fader, transport buttons and pitch and mod wheels. Read the control list in the listing alongside the width and depth.
What you need
M-AUDIO Keystation 49 MK3 USB MIDI Controller
A 49-key controller that measures 32.26 inches wide, with full-size velocity-sensitive keys, pitch and mod wheels and bundled DAW software.
- Keys: 49
- Software named in listing: Ableton Live Lite
- USB-MIDI
- 1-year warranty stated
Akai Professional MPK Mini IV 25-Key USB-C
A 25-key mini controller that measures 13.88 inches wide and weighs 2.2 lb, with 8 MPC pads, 8 knobs and USB-C.
- Keys: 25
- Pads: 8
- Knobs / faders: 8
- Software named in listing: Ableton Live Lite
- USB-MIDI
- 1-year warranty stated
- 2.2 lb, the lightest here
Novation Launchkey 49 MK4 USB MIDI Keyboard
A 49-key controller that measures 31.69 inches wide and 14.76 inches deep, with 16 pads, 9 faders and a 3-year warranty.
- Keys: 49
- Pads: 16
- Knobs / faders: 9
- Aftertouch
- Software named in listing: Ableton Live
- USB-MIDI
- 3-year warranty stated
Akai Professional MPK Mini Plus 37-Key USB
A 37-key controller that measures 17.9 inches wide and weighs 2.9 lb, with 8 MPC pads, a 64-step sequencer and MIDI/CV/Gate I/O.
- Keys: 37
- Pads: 8
- Knobs / faders: 8
- USB-MIDI
- 1-year warranty stated
These come from our ranked list Best MIDI Keyboard, which compares them spec by spec.
Frequently asked questions
How wide is a 49-key MIDI keyboard?
The 49-key controllers here measure 32.26 inches wide for the Keystation 49 and 31.69 inches wide for the Launchkey 49. Measure the desk width and compare it with the width in the listing.
What should I measure before buying a 49-key controller?
Measure the desk width and depth, then compare them with the width and depth in the listing. Check the weight too if the controller moves between the desk and a bag.
Is a 25-key controller smaller than a 49-key controller?
Yes, by the width figures in the listings. The 25-key MPK Mini IV measures 13.88 inches wide, while the 49-key examples measure 32.26 and 31.69 inches wide. The 37-key MPK Mini Plus sits between them at 17.9 inches wide.
How heavy is a 49-key controller?
The Keystation 49 weighs 4.9 lb and the Launchkey 49 weighs 9 lb, per the listings. The 25-key MPK Mini IV weighs 2.2 lb and the 37-key MPK Mini Plus weighs 2.9 lb.
Ranked MIDI keyboards lists
More how-to guides
Product details come from each Amazon listing and can change. Check the listing before you buy.