Gig Bag


Sigma SJM-SG45+ All-Solid Slope Shoulder Dreadnought Acoustic Guitar

Available at Acoustic Centre Melbourne

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Free shipping Australia-wide on all Sigma Guitars! Instore stock and website stock may vary: please call on 03 9699 5691 for accurate stock level.

Discover the impressive Sigma SJM-SG45+ acoustic guitar, now available at Acoustic Centre, your trusted music store in Melbourne. This latest version of the iconic singer-songwriter guitar boasts elevated specifications and delivers the renowned slope shoulder dreadnought tone and character. With a solid Adirondack spruce top, solid mahogany back and sides, and a dovetail neck joint, this instrument showcases exceptional craftsmanship and attention to detail.

The SJM-SG45+ features a stunning traditional-style Sunburst finish that beautifully complements its vintage aesthetics. Its 24.75" scale length and 1-3/4" nut size make it a highly sought-after choice among slope shoulder dreadnought enthusiasts. This guitar is equipped with a Fishman Sonitone pickup system, allowing you to amplify your performance with ease and versatility.

Enjoy the rich, resonant sound and superb playability of the SJM-SG45+ guitar, backed by Sigma's commitment to quality and craftsmanship. Each instrument comes with an official gig bag for added convenience and protection. Please note that stock availability may vary between our physical store and website. For the most accurate information, we recommend calling us at 03 9699 5691. Our knowledgeable team is ready to assist you in finding the perfect guitar to elevate your musical journey.

Sigma SJM-SG45+ guitar including fitted LR Baggs Element VTC pickup system and official Gigbag.
Body Size: D-14 Fret, Slope Shoulder
Construction: Dovetail Neck Joint
Top: Solid Adirondack Spruce
Back & Sides: Solid Mahogany
Neck: Mahogany
Nut: Bone
Saddle: Bone
Fingerboard: Ebony
Bridge: Ebony
Scale Length: 24,75” (628 mm)
Neck width at nut: 1-3/4” (44,5 mm)
Tuning Machines: Grover Nickel Open-Geared w/ Ivoroid knobs
Electronics: LR Baggs Element VTC
Finish: Ultra-thin UV-finish
Bag: SB-D
Strings: Strings: D´Addario EXP16






Acoustic Centre offers free shipping on all new items to most locations within Australia on all orders over $99, excluding Western Australia, Northern Territory and Far North Queensland. Used items have a flat rate shipping fee of $59 within our usual shipping locations. We also offer competitive Express shipping options at checkout.

Customers located in Western Australia, Northern Territory and Far North Queensland recieve free shipping on all accessory orders over $99, but will incur a flat rate instrument or large item shipping charge of $179 (or $299 for Express shipping).

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.

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.

We endeavour to show the actual instrument in stock whenever possible, but the guitar in stock may differ slightly from the one shown on our website. Materials used can look different from guitar to guitar, including timber grain and colour, parts colours and finishing. If an instrument is a one-of-a-kind or preowned guitar, the picture will always be of the actual guitar in stock, but production models may have slight variations to the picture shown.

If you're after a particular look, feel free to email us at or send us a message through our chat service to request photos of the actual guitar in stock. We are more than happy to send through pictures of all in-stock guitars, to make your choice easier.

Please note that returns will not be accepted for variations in timber grain /  colouring, finish variations and parts colouring, unless there is a fault with the instrument. If you have any questions at all regarding an instrument's appearance, just drop us a line - we're always happy to send photos, and if we have more than one instrument in stock you'll be able to choose the exact guitar that you receive!

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