Sold out
Gig Bag


Sigma SOMR-45 All-Solid Style 45 OM Acoustic Guitar

The SOMR-45 is the premium OM acoustic guitar from Sigma. Based on the time-honoured OM shape, arguably the most versatile design to grace acoustic guitar history. It combines comfort with balanced tonality, and is suitable for both fingerstyle and flat-picking players of all genres. The solid Sitka Spruce top and the East Indian Rosewood back and sides give the guitar an extended frequency range, while the 25.4" scale length optimise projection.

This guitar draws on the iconic Style 45 flourishes that are immediately recognisable: Mother-of-pearl inlays, purfling and rosette adorn the instrument, giving it a luxurious aesthetic, while the butterbean tuners and aging toner on the gloss finish give the guitar a warm, inviting presence. All of this is then brought together with the beautiful ivoroid binding on the fingerboard and body. All-in-all, the SOMR-45 is a beautiful union of musicality and design and a trusty companion for a life of adventures in song.

Includes gigbag.


Body Size: 000-14 Fret
Construction: Dovetail Neck Joint
Top: Solid Sitka Spruce
Back & Sides: Solid Indian Rosewood
Neck: Mahogany, Low Profile
Nut & Saddle: Bone
Fingerboard: Ebony
Scale Length: 25.4” (645 mm)
Neck width at nut: 1-3/4” (44,5 mm)
Tuning Machines: Grover Gold Open-Gear w/ Butterbean knobs
Finish: Polished Gloss with aging toner
Softshell Case: SSC-OM included
Strings: D´Addario EXP16

Acoustic Centre offers free Australia-wide shipping on all accessory orders (excluding bulky items including amplifiers and cases) over $50, and free courier shipping with tracking on all instruments and amplifiers over $599, and cases over $299. We also offer Express shipping options at checkout.

Occasionally due to issues with delivering to remote or unusual destinations, we aren't able to offer free postage. We reserve the right to retract the offer if freight costs exceed 15% of your purchase. We will always notify you if there is an issue and offer a full refund or arrange alternative delivery options.

All strings and accessories will be shipped with tracking via courier or Australia Post. Other items including guitars and amplification equipment will be shipped using our courier service providers, with a tracking number and signature on delivery.

The Acoustic Centre ships goods Australia-wide, however at this time we are unable to accept international orders. Please contact us on (03) 9699 5691 to enquire about a special order. The Acoustic Centre is located at 206 Park St. South Melbourne, Victoria, Australia. We ship daily at 2pm (Monday to Friday) excluding Victorian public holidays.
You are welcome to pick your order up instore, but we will require photo identification to ensure against fraud. If you require more info on shipping to your area, or have any questions regarding shipping, please contact us via or by phone on (03) 9699 5691.

Zip Money - Buy Now, Pay Later.

We offer 3 Months interest free on purchases under $1000, and 6 Months interest free on purchases over $1000.

Click here for more information and Application form - it only takes a minute!

Studio 19 RentalsWe rent the things people love.

Studio19 Rentals operates Australia’s foremost in-store Rental program for musical instrument retailers, and allows you to have the gear of your dreams now for a low monthly price. 

Studio19 offers:

  •  Low monthly payments
  •  Apply to buy at any time
  •  Protection plan available
  •  Return anytime after the minimum rental period
  •  No ongoing account keeping fees or charges

Click here  for more details.