Monoj K. Sardar Scale-Changer Foldable

Scale-changer foldable from Monoj Kumar Sardar is ideal for experienced musicians, who seek a high quality instrument with all extras and the largest range of functional possibilities for use in all kinds of different contexts.

EU: 1.189 € (incl. bag)
incl. VAT, plus 25.10 € shipping within Germany / 45.10 € within Europe
Non-EU: 999,16 € (incl. bag)
plus 45.10 € shipping within Europe / overseas on request

The whole keyboard of three octaves can be shifted in half note steps from g sharp up to e (scale-changer) - which makes transposing child's play! Each note is fitted with three reeds in high, middle and low octave (female / male / bass). They can be played separately or in various combinations, giving many different tonal colours. When using the octave coupler up to six reeds can be played simultaneously with just one key, creating a particularly powerful, rich and carrying sound. However, the more reeds are used the more air needs to be pumped with the bellows. The multifold side bellows give you all possibilities of using air supply for dynamic artistic expression. The level height of the keys can be adjusted. The instrument can be folded into an integrated wooden case for safe carrying with one hand and storage at home.

"BONUS: One month free online access to comprehensive harmonium teaching material at the Bhakti Breakfast Club with harmonium purchase!" - more info here!

Sound sample Monoj Kumar Sardar Scale-Changer
- complete melodic range with all three registers
- three-note chords in middle range 
- complete melodic range with all three registers without cover (jali)


Total range of 3 3/4 octaves (= 45 notes), moveable keyboard of three octaves (= 37 notes), triple reeds
(female / male / bass), four register stops, five drone stops, lower octave coupler, 5-fold side bellows, adjustable keys, cabinet made of teak wood, wedges for easy opening, surfaces silk mat polish, integrated wooden case, including cover.

Manufacturer / Supplier

MONOJ KUMAR SARDAR & BROTHERS is a relatively large-scale manufacturer in the heart of Calcutta looking back on a rich tradition of three generations. It is run by four brothers, all of them trained craftsmen specialising in different aspects of instrument making. They mainly make sitars, tanpuras, esrajs, dilrubas, harmoniums and shrutiboxes. But the eldest brother and manager Monoj Kumar will get you every other instrument that is manufactured in India as well. Due to our long-term co-operation with Monoj Kumar Sardar since 1994, we receive instruments with a high quality level in terms of sound, workmanship and materials. Today Monoj Kumar Sardar's quality can well compete with other renowned brands like Hemen and Hiren Roy for string instruments or Pakrashi, Paul and Bina for harmoniums.


In India, our harmoniums are tuned to international concert pitch of a = 440 hertz. In Europe, however, they usually sound slightly higher at a = 441 to 442 Hertz due to the colder climate. The difference is small and not necessarily noticeable even to trained ears.

We do not offer manual set-up of other tunings for harmoniums with 3 sets of reeds - the extremely sensitive reeds in the highest register can too easily be damaged beyond repair.

Air temperature and blowing pressure influence the vibration frequency of harmonium reeds. At higher temperature and higher pressure, it decreases; at lower temperature, it increases. In our workshop in Berlin we tune  at room temperature around 20 degrees Celsius.


Measure (folded): height 19 cm, width 63 cm, depth 42 cm, weight: 17 kg
Measue (unfolded): height 27 cm, width 63 cm. depth 42 cm
Each instrument is individually hand-crafted and might differ from our description.

Register & Drone

Monoj Kumar Sardar Scale Changer Details