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Martin Custom Shop Custom “GP” Grand Performance Pacific Big Leaf Flamed Maple (388)

Custom Shop Grand Performance with Italian Alpine spruce and flamed maple for a sweet, focused, ultra responsive acoustic voice.

Martin Custom Shop Custom “GP” Grand Performance Pacific Big Leaf Flamed Maple (388)

Custom Shop Grand Performance with Italian Alpine spruce and flamed maple for a sweet, focused, ultra responsive acoustic voice.

$7,463.68

0% for 36-48 months available

Quick Specs

  • Grand Performance 14 Fret non-cutaway body
  • Italian Alpine Spruce top with Ambertone 1933 gloss finish
  • Pacific Big Leaf flamed maple back and sides
  • Mahogany neck, Modified Low Oval profile with PA taper
  • Black ebony fingerboard and bridge
  • 25.4" scale length, 1 3/4" bone nut
  • 4.8 lbs, pure acoustic design with no onboard electronics

FREE Player-Perfect™ Pro Setup ($100+ Value)

Our techs are all seasoned players, so they dial in every guitar like it’s going into their own rig—perfect intonation, action set exactly right, ready to rip from the first note.

Want it YOUR way? Tell us at checkout: string gauge, action height, whatever you need. We’ll nail it before shipping.

Inspected 3X Before Shipping

Free 1-4 Day Shipping

72-Hour Love-It Guarantee

Ships Today if Ordered Before 3PM CST
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Only 1 Left In Stock - Inspected & ready to ship.

1 in stock

Custom Shop Grand Performance With Sweet, Focused Power

This Martin Custom Shop Grand Performance is what happens when you pair Italian Alpine spruce with Pacific Big Leaf flamed maple and let the Custom Shop crew go to town. It is light in the hands, huge in the room, and has that sweet, focused voice that makes every note feel intentional.

At 4.8 lbs it feels almost effortless on a strap, yet it still pushes air like a full size workhorse. Real talk, if you live in the world of modern acoustic music where clarity, balance, and nuance matter more than raw boom, this GP hits that sweet spot.

Italian Alpine Spruce Top With Ambertone 1933 Glow

The Italian Alpine spruce top is the heart of this guitar. It is punchy and articulate, with a sweetness on top that keeps things glassy instead of harsh. Fingerstyle lines stay defined, big open chords stay clear, and there is plenty of headroom when you dig in.

The Ambertone 1933 finish gives it that classic, almost vintage vibe without feeling like a museum piece. Under stage lights or in a dim studio, the top has a warm glow that matches the warmth in the tone.

Pacific Big Leaf Flamed Maple Back And Sides

Pacific Big Leaf flamed maple on the back and sides brings a very specific kind of magic. You get tight, controlled low end, a fast and immediate response, and a focused midrange that lets every note speak. No mud, no wool, just clean definition.

Visually, the flame figuring is the kind of thing you catch yourself staring at between takes. Sonically, the maple gives you that quick, percussive attack and long, clear sustain that records beautifully and cuts through a mix without ever getting in the way of vocals.

Effortless Feel From The Modified Low Oval Neck

The mahogany neck with the Modified Low Oval profile and PA taper feels fast and familiar right away. It fills your hand just enough so you feel connected to the guitar, but it never feels like you are fighting it on long sessions.

Pair that with the black ebony fingerboard and you get a slick, smooth playing surface that makes slides, hammer ons, and intricate chord shapes feel almost automatic. It is the kind of neck that disappears under your hands and just lets you play.

Pure Acoustic Voice, No Electronics Onboard

This one was intentionally ordered without electronics to keep the acoustic voice as pure as it gets. No preamp in the side, no extra holes in the body, just wood, air, and strings doing what they are supposed to do.

If you need to plug in later, a good tech can install the pickup system of your choice. Until then, you are getting the most direct, uncompromised version of what this spruce and maple combo can do.

Custom Shop Build Quality With Case Included

Being a Martin Custom Shop build, the little stuff is handled. Clean joinery, precise fretwork, a properly cut bone nut, and hardware that feels solid and dependable. It feels like a lifer guitar, not a stop along the way.

It ships in a deluxe hardshell case, so this GP is ready to travel, gig, or live in the studio from day one. Here is the lowdown: if you have been chasing a high end Martin that leans modern, focused, and incredibly playable, this GP should be on your short list.

Questions about this guitar? Call (888) 794-8482 and talk to someone on the Moore Guitars team. Real players, real conversation, no scripts.

Anatomy of a Tone Machine

Anatomy of a Tone Machine

Perfect for: Singer songwriter sets • Modern fingerstyle • Worship and church music • Studio and session work • Acoustic pop and folk

Tone

  • Sweet, focused voice from Italian Alpine spruce with maple clarity
  • Tight low end and balanced mids that stay clean, even under heavy strumming
  • Glassy top end that adds sparkle without ever turning harsh
  • Notes bloom and then get out of the way, perfect for vocals and dense mixes
  • Highly responsive to touch, from whisper quiet passages to full throttle attack

Playing Feel

  • Grand Performance body balances comfort with full, room filling tone
  • Modified Low Oval neck with PA taper feels fast, relaxed, and easy on the hands
  • Black ebony board feels smooth and precise under every finger movement
  • Light 4.8 lb build keeps long gigs and sessions feeling effortless
  • 25.4" scale gives you clear attack and just the right string tension

Versatility

  • Equally at home with delicate fingerstyle or aggressive strumming
  • Records beautifully with minimal EQ thanks to its focused, balanced tone
  • Perfect platform for adding the pickup system of your choice later
  • Great fit for solo artists, church teams, and studio players who need consistency

Complete Technical Specs

Body Specs

TypeAcoustic Guitar
ShapeGrand Performance 14 Fret, non-cutaway
TopItalian Alpine Spruce
Back and SidesPacific Big Leaf flamed maple
BracingScalloped 5/16"
FinishGloss body, Ambertone 1933 top finish
BindingBlack
Weight4.8 lbs

Neck Specs

WoodMahogany
ProfileModified Low Oval with PA taper

Fingerboard Specs

MaterialBlack Ebony
InlaysDiamonds and Squares Long Pattern
NutBone
Nut Width1 3/4"

Electronics Specs

ElectronicsNone, ordered without electronics for pure acoustic tone

Hardware Specs

BridgeBlack Ebony
TunersGrover Nickel V97-18NA StaTite 18:1
CaseDeluxe hardshell case included

Measurements

Scale Length25.4"
Nut Width1 3/4"
Weight4.8 lbs
The Lowdown

The Lowdown

We get it. Buying a guitar you haven’t played is a big decision. You need to know it’s going to feel right, sound right, and inspire you the second you open the case. We put together the questions we’d be asking if we were in your shoes—the real-world stuff that specs alone can’t answer. If there’s anything else you’re wondering about, just give us a call.

This is a full blown Custom Shop build, so you are getting hand selected woods, a more dialed in spec, and extra attention at every stage. Compared to a standard production GP, this one feels a little more alive under the hands and more focused in the mids. If you want something that feels a bit more personal and boutique, this is that step up.
Maple changes the game. Instead of big, boomy low end, you get tight lows, quick response, and tons of clarity. That pairs beautifully with the Italian Alpine spruce top, giving you a sweet but very defined tone that is killer for modern acoustic styles and recording. Plus, the flamed figuring looks incredible in person.
If you play plugged in all the time, you will eventually want a pickup, but starting without electronics keeps the acoustic voice as pure as possible. Many players actually prefer it this way so they can choose their own system later. Any good tech can install a pickup when you are ready, and until then you get the most resonant version of the guitar.
If you are a serious acoustic player who lives in the worlds of worship, singer songwriter, fingerstyle, or studio work, this GP makes a ton of sense. It is for players who care about clarity and touch sensitivity more than raw volume, and who want a Custom Shop level instrument that will keep up with them for decades.
Of course. Every guitar gets our full Player-Perfect™ setup, but tell us your preferred string gauge and action at checkout, and we’ll dial it in exactly to your spec before it leaves the shop.
This guitar is covered by our 72-Hour Love-It Guarantee. If you’re not completely inspired by it, just let us know. We’ll make it right.
If you order before 3 PM CST on a weekday, it ships the same day. We’ll get it into your hands fast with free, insured 2-3 day shipping.
Call us at (888) 794-8482. You’ll talk to a real musician who can answer anything you need to know.
The Moore Guitars Difference

Player-Perfect™ Setups

Every guitar we sell is dialed in by seasoned musicians. We obsess over the details—perfect intonation, immaculate fretwork, and ideal action—so your guitar is ready to rip right out of the case. No exceptions.

Advice From Real Players

Call us and you get a fellow musician, not a script. We'll help you compare neck profiles, talk tone, and find the right guitar for you—even if it's not this one. Our reputation is built on honest conversation.

49+ Years Of Trust

Family-owned since 1976, we stand behind everything we sell. That's why we have a 72-Hour Love-It Guarantee. If you're not inspired, send it back on our dime for a full refund. Your satisfaction is our legacy.

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