Sale

JM-SG45

Sigma JM-SG45 Slope Shoulder Dreadnought Acoustic Guitar

Available at Acoustic Centre Melbourne

The Sigma JM-SG45 is a slope shoulder dreadnought that captures the spirit of the iconic J-45 body shape. A solid Sitka spruce top paired with mahogany back and sides delivers a warm, punchy tone with strong projection, suited to singer-songwriters, strummers and fingerstyle players alike, while the vintage sunburst finish and slope shoulder body make it a head-turner in sound and appearance.

Built for comfort and performance, the JM-SG45 features a low-profile mahogany neck, a Micarta fingerboard and a 1-3/4" bone nut for easy fretting and smooth chord transitions. Onboard Fishman Sonitone electronics with discreet soundhole controls make it ideal for clean, natural amplification when performing or recording, and Grover nickel open-geared tuners with a high-gloss polish round out a guitar that blends modern reliability with classic style.

Features

  • Slope shoulder dreadnought body delivers a classic, full-bodied tone with strong projection.
  • Solid Sitka spruce top with mahogany back and sides adds warmth and punch across the tonal range.
  • Fishman Sonitone pickup system with soundhole-mounted Volume and Tone controls delivers clean, natural amplified sound.
  • Low-profile mahogany neck and 1-3/4" nut width improve playability and comfort during long sessions.
  • Vintage sunburst finish with high-gloss polish gives the JM-SG45 classic, head-turning looks.

Specs

  • Body: Slope shoulder dreadnought (D-14 fret)
  • Neck joint: Dovetail
  • Top: Solid Sitka spruce
  • Back & sides: Mahogany
  • Neck: Mahogany, low profile
  • Nut & saddle: Bone
  • Fingerboard: Micarta
  • Scale length: 24.75" (628mm)
  • Nut width: 1-3/4" (44.5mm)
  • Tuning machines: Grover, nickel, open-geared
  • Electronics: Fishman Sonitone, soundhole-mounted controls
  • Finish: High-gloss vintage sunburst
  • Includes: Softshell case

Instruments & Amps

  • Free courier shipping on orders over $1499 to eligible metro areas

  • $49–$69 standard shipping on lower-value orders

  • Express shipping available for an additional fee

  • Regional and remote areas may incur higher freight costs

Accessories

  • Free standard shipping on orders over $99

  • Flat $8.99 shipping under $99

  • $15 express shipping available

Delivery Details

  • All orders ship with tracking

  • Instruments and large items require signature on delivery

  • If freight costs exceed expectations, we’ll contact you before shipping

Shipping rates, eligibility, and delivery options are confirmed at checkout based on your location.

Ways To Pay

Buy Now, Pay Later

  • Zip – 3 months interest-free under $1,000, 6 months interest-free over $1,000

  • Afterpay – available at checkout

Pay in Full

  • Credit & Debit Card

  • PayPal

  • Bank Transfer

Rent to Own

  • Studio19 Rentals – low monthly payments with the option to buy later

All prices are in AUD and include GST. Payment options are shown at checkout.

Returns

  • If something’s not right, please contact us first and we’ll help you work through the best solution

  • Returns, exchanges, repairs, or credits are available for faulty or misdescribed items

  • Return requests should be made within 7 days of delivery

  • Freight charges aren’t refundable

  • Non-faulty returns may incur return shipping and a small restocking fee

  • Opened consumables (including strings and picks) can’t be returned

Returns are assessed case-by-case so we can ensure the fairest outcome for everyone.

  • We aim to show the exact guitar in stock whenever possible

  • For one-of-a-kind or preowned instruments, photos will always be of the actual guitar you’ll receive

  • Production models may vary slightly in timber grain, colour, finish, or hardware due to natural materials

  • If you’d like to see the exact guitar before buying, just ask — we’re happy to send photos of the instrument in stock

  • Where multiple guitars are available, you can choose the exact one you receive

Please note: natural cosmetic variations aren’t considered faults, but if you have any questions about appearance, we’re always happy to help before purchase.

Customer Reviews

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