- All Mattisson gear is inspected prior to shipping -
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass
Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass

Serial Number: mattisonjgpro

Mattisson Series I Janek Gwizdala Signature Prototype 5-String Bass

Condition: New

  • Free Contiguous USA shipping
  • Setup and inspected by our tech team
  • In stock, ready to ship
$6,499.99
/

We take trades from anywhere in the USA! Learn more about our trade-in process, or contact us to get your trade-in appraised.

We have 3 ways to finance:

Financing (like a credit card, with a credit check)

  • Affirm 0% financing up to $17,500
  • Klarna "as-low-as" 0% financing

To get started: add gear to your cart, start the checkout process, and then select Affirm or Klarna as your payment option. You will do a super easy credit app and be good to go!

Layaway (we hold the gear until its paid off, no credit check)

  • Layaway with 25% down with 90 days to pay, no weekly payments

To get started: contact us and we will send you a layaway contract to e-sign and 25% invoice.

SHIPPING

All of our orders are shipped with UPS and signature required at delivery (excluding small accessories).

Orders placed before 2PM EST will ship same-day.

You will receive a tracking number as soon as your order ships. Please note: All delivery changes (hold for pickup, address change, etc.) must be requested before your order leaves our store, otherwise, they are the responsibility of the customer.

RETURNS

You can return an item for any reason up to 5 days from receipt of the item, with the exception of international orders or instruments that have been modified at the customer's request. You will need to pay the return shipping cost and outgoing shipping cost (even if “free shipping” is offered), as well as applicable restocking fees dependent on your payment method (usually a 3-10% fee, specific amounts can be found at the link below).

We highly recommend reviewing our full return policy before purchasing so there are no surprises.

Experience our innovative Video Appointment service! Connect with a Gear Expert to hear this instrument played live and receive personalized guidance on your gear journey.

Schedule your appointment, available Monday through Saturday from 11am to 5pm ET.

Email us or call/text us at 315-447-3243

Make an appointment to visit our showroom

Series I 5-str. JG first Prototype

-P-style bass, light weight 5-string with 26 frets, 32” scale stringed E-C.

-One-piece light alder body for that resonant old school warmth. 

-Light weight ash neck with maple fretboard.

-Neck pickup equipped with a reversed P-pickup, later added a dual coil in bridge position.

-Painted with a gold color and topped with a matte black, then ”road worn”

-This bass has an almost classical guitar tone (when played the right way )

-One of a kind bass since changes were made to the final Series I Janek Gwizdala signature.


Woods and specifications:

# Body wood: one piece alder, dried 17 years in our shop.

# Neck wood: ash

# Fretboard: maple (dots in elm wood)

# Pickups: Aguilar P and Super double

# Passive Vol. /Vol. tone

# String spacing at bridge: 0.656”

 

In our eyes, this bass is brand new, but has some loving touches from Janek, like the duct tape on the cavity control cover. 

Includes Mattisson branded gig bag. 8.6lbs.

Questions?

Call/text us at 315-447-3243

Email us team@ishguitars.com

Click to hear this instrument in-person or virtually

Ish loves Mattisson

We go beyond your typical guitar store. Each instrument is inspected at our in-house luthier shop before, during, and after its stay with us.

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Testimonials

Fantastic company. Answered my email promptly and shipped very quickly! I highly recommend Ish Guitars!

Robert, PRS Custom 24 Piezo

Awesome transaction! I bought a pretty special guitar (previously owned by a famous guitarist), and Ish nailed it. Ethical dealer, quick ship, and fast responses. I look forward to doing business with them again in the future!

Devin, L'arrivee D-60

Awesome guitar. Came with a perfect setup and no issues. Would love to buy another guitar from you guys.

Matthew, Music Man Cutlass