Sigma JM-SG45 Slope Shoulder Dreadnought Acoustic Guitar

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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.

Introducing the extraordinary Sigma JM-SG45 Slope Shoulder Dreadnought Acoustic Guitar, a true gem inspired by the iconic J-45 model. As one of our top picks at Acoustic Centre, this guitar is a testament to Sigma's commitment to excellence in craftsmanship and sound.

Crafted with a solid Sitka spruce top and mahogany back and sides, the JM-SG45 delivers a rich, resonant tone with exceptional projection. The vintage sunburst finish adds a touch of timeless elegance to its appearance, making it a real eye-catcher.

Designed with player comfort in mind, this guitar features a low-profile mahogany neck with a vintage-style feel, along with a Micarta fingerboard for smooth playability. The 1-3/4" nut width provides ample room for fingerpicking and strumming alike.

Equipped with a Fishman Sonitone pickup system, complete with soundhole Volume and Tone controls, this guitar is ready to hit the stage or studio. The Grover Nickel Open-Geared tuning machines ensure precise and stable tuning, while the high gloss finish enhances its overall beauty.

With its exceptional craftsmanship and superb sound quality, the Sigma JM-SG45 is a must-have for any discerning guitarist. Experience the joy of playing this remarkable instrument and explore new musical horizons. Get yours today, and don't forget that the softshell case is included for added protection. Visit Acoustic Centre, both online and in-store, where our dedicated team is ready to assist you on your musical journey.


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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