Sigma GMC-STE+ Grand OM Electro Acoustic Guitar

Available for Pre Order  |  Usually available in 7 - 10 days. Email me when back in stock
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This charming electro acoustic guitar is the Sigma GMC-STE, and in the Grand OM shape, it features a solid top, Fishman electronics, a stunning tone and unbeatable value for money! With a cutaway body and onboard tuner not only does it look great but it has all the essentials you need. If you're looking for a high quality acoustic guitar on a budget this is a serious contender for you!

The body is crafted from a solid piece of Sitka Spruce for the top and delicious Mahogany for the back and sides. All the woods on this guitar are finish in Satin. Thanks to the solid top you get a magnificent tone, it's bright, it's cheerful, it's balanced. It just sounds amazing. The Mahogany back and sides balance the brightness of the Spruce to bring a stunning tone that sounds like it should be coming from a much more expensive guitar! 

The body, in the Grand OM size, is quite big which give the guitar lots of natural power and resonance. The bass end is full, the mids are crisp and the highs are a delight to the ears. It's a recipe for a golden tone. 

That's just acoustically, what about when it's plugged in? Well, with the world renowned Fishman Isys+ preamp system you can be sure that this guitar's excellent tone is amplified perfectly when plugging into a PA at a gig or an amp at home. With the on board tuner it's an all in one package and ready to busk, gig & record.

The neck, made from Mahogany, is satin finished for a smooth easy feel. 20 frets sit in an Micarta fingerboard and it just feels great to play. The factory set action is rather good!

Overall, a very nice guitar at excellent value for money. We urge you to check out Sigma!



  • Solid Sitka Spruce Top
  • Mahogany back & sides
  • Satin finish

Neck / Fingerboard

  • Mahogany neck
  • 20 frets
  • Micarta fingerboard
  • Bone nut
  • 25.4" scale length
  • 44.5mm nut width


  • Fishman Isys+ preamp 
  • Built in tuner
  • Bass & Treble EQ control
  • Phase invert button
  • Volume
  • Tuner on/off button


  • Compensated bone saddle
  • Sigma tuners



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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.