Sigma JM-SG45 Electro Acoustic Guitar - Vintage Sunburst

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This Sigma JM-SG45 is a stunning drop shoulder dreadnought electro acoustic guitar that's finished in a magnificent vintage sunburst gloss. This iconic shape looks amazing and this instrument has a sound to die for. With excellent playability, a full cheery tone and expensive looks it's whole lotta guitar for your money.


A SOLID Sitka Spruce top creates a wonderful brightness and resonance that's balanced with the warmth of the Rosewood back and sides. The body is finished in a stunning Vintage Sunburst gloss that just looks incredible. I mean, just look at the images of this beauty!


The electronics are the Fishman SoniTone pre amp system. What's great about this pickup is that you don't have any ugly control panels or knobs on the outside of the guitar which is fantastic as it makes the guitar look like its completely natural and just acoustic. The Volume and Tone controls are excellent, discretely hidden in the soundhole so you can easily change your sound without giving away that it's an electro! The guitar is plugged in via the strap button which also looks discrete!


The neck on this guitar is quite wide, similar to a classical guitar. At 44.5mm wide at the nut it's wider than your standard acoustic guitar. This feels great, substantial and allows a greater distance between the strings for fingerpicking. The neck is Mahogany and is finished in satin for optimum playability. The fingerboard is Indian Rosewood and there are 20 frets marked with white dot inlays. It feels so great to play this baby, it just feels right!


A full sound bellows from the soundhole. It's got volume, it's got bass, it's got stunning highs! A tasteful, rounded tone that's good enough for any gig or studio session. 


A stunning guitar. Check it out today online and in store! FREE UK delivery + FREE tune and 12 point check before dispatch. 



  • Solid Sitka Spruce Top
  • Mahogany back and sides
  • Gloss finish
  • Vintage Sunburst
  • Slope shoulder dreadnought shape
  • D-14 Fret
  • Cream binding

Neck / Fingerboard

  • Indian Rosewood fingerboard
  • Mahogany neck
  • Satin neck finish
  • 20 frets
  • 24.75" scale length
  • 44.5mm nut width
  • Wide fingerboard
  • Dot inlays


  • Fishman SoniTone pre amp
  • Volume / Tone controls inside sound hole
  • Jack output doubles up as strap button


  • Grover Nickel open gear tuners 
  • Ivoroid tuning buttons
  • Tortoiseshell pickguard 
  • Rosewood bridge
  • Bone compensated saddle
  • Bone nut



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In Stock
All products on our website that have a "Buy Now" are in stock, this means we can deliver your order to you very quickly, subject to payment authorisation. The next dispatch date is shown against each product, and below is an indication of when you can expect your purchase.

Pre Order

Products that have a "Pre Order" button are note currently in stock, but are available to oder.  We anticipate that these items will take approx 10 working days to reach you (but this is a lot quicker in most cases). Once you place your order we will contact our suppliers immediatly and ofrder the item in for you. If there is a longer delay expected we will contact you.


All Guitars are Checked Before Dispatch
All Guitars go through our 12 point checking procedure to make sure that it passes our standards before shipping. This helps ensure your guitar will reach you in perfect condition. All guitars are checked against our 12 point check list and once passed, have a Guitarbitz quality control sticker attached. In addition to this we want to ensure that no harm can come to your guitar on the journey between us and you and so we have a rigorous packing procedure involving multiple protective layers. If you notice that this packaging is damaged when delivered by our courier, it is important to check the goods and if damaged, refuse the delivery and call us immediately. For your peace of mind, we have outlined the 12 point check below to show how we are passionate about your instrument.

body finish check   strings checked   neck check
1) Finish checked for imperfections or damage
2) Strings tuned up and tested for tone and playability
 3) Neck checked for bending or humps
  truss rod check frets check
4)  Truss rod adjusted for correct positioning
5) Frets examined for playability 6) Bridge checked for position and hold on strings
strap hooks checked neck joint check machine heads checked
7) Strap buttons tested for secure fitting
8) Neck joint examined
9) Machine heads turned and tested for secure grip on strings
top nut check controls checked pickups checked
10) Nut tested for secure fitting and correct string height
11) Switches, volume and tone controls tested for faulty connections 12) Pickups checked for responsiveness

For more details on our checking and packing procedure, please see our 12 Point Check and Packing Procedures page.


When You Will Receive your Order

Guitar accessories - strings, straps, stands, tuners and other small items
• Orders weighing less than 2kg are posted via First Class Royal Mail on the dispatch date shown.
• Orders weighing less than 2kg with a value over £30 will be sent First Class Royal Mail Recorded Delivery on the dispatch date shown.
• We cannot guarantee a delivery date for these orders, but First Class post usually takes 1-2 days.

Guitars, Amplifiers and larger items
• Orders weighing over 2kg are sent via our next working day courier service.


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Interlink Express Courier Delivery
The Home Delivery Service You Have Been Waiting For. Interlink Express will provide you with a one hour delivery window so you don’t have to wait in all day for your parcel.

When Interlink Express deliver:
• You are given a one hour delivery window
• You are notified of this by email on the morning of delivery
• If not convenient you can use the email to change the delivery date

International Deliveries
We can deliver to the following European countries,
• Zone 1 - Austria, Belgium, Denmark, France, Germany, Republic of Ireland, Italy, Luxembourg, Netherlands and Spain - £30 (including TAX) per order.
• Zone 2 - Finland, Portugal and Sweden - £40 (including TAX) per order.
• Zone 3 - Switzerland and Norway - £75 (excluding TAX) per order.
Please note that we can only deliver international orders to the billing address of the credit card used. These orders typically take 3-5 working days to be delivered, you can still track your orders via the Internet in the same way.