Yamaha TRBX504 Trans Black

4-string Electric Bass with Mahogany Body, 5-pc Maple/Mahogany Neck, Rosewood Fingerboard, Active Electronics, and 2 Humbucking Pickups - Transparent Black
Yamaha TRBX504 Trans Black image 1
Yamaha TRBX504 Trans Black image 1
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Yamaha TRBX504 Trans Black
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An Extremely Versatile Bass with Active Electronics!

The Yamaha TRBX504 bass guitar brings versatility, killer looks, and amazing performance together in a complete package. This sleek-looking, great-sounding bass gives you a comfortable Yamaha body shape and a fast-action bolt-on 5-piece maple/mahogany neck with a smooth-playing rosewood fingerboard. A pair of humbucking pickups deliver hum-free sound and powerful active electronics lets you optimize your bass or different playing styles. Factor in the Yamaha TRBX504's solid hardware and thoughtful design, and you've got a great-looking bass that's ready to conquer any stage.

Yamaha TRBX504 4-string Bass Guitar at a Glance:
  • Comfortable body with progressive styling
  • Humbucking pickups deliver massive bass tone
  • Yamaha quality, through and through
Comfortable body with progressive styling

One look at the Yamaha TRBX504 electric bass, and you know it means business. A deep cutaway gives you clean access to the higher registers for soloing, while the pronounced upper bout provides balance (and looks cool). The 5-piece maple/mahogany neck has a comfortable and fast-playing profile. The TRBX504 sports a precision fitted neck joint that gives you clear, punchy tone. And the straight string pull of the headstock offers improved tuning stability and reduces overtones. You're going to love the way the TRBX504 looks, plays, and feels!

Humbucking pickups deliver massive bass tone

Yamaha loaded the TRBX504 with a pair of custom-designed H5 humbucking pickups. These pikcups house alnico magnets and four polepieces per string for big, open tone without any hum. On top of amazing pickup tone and performance, the TRBX504 has any extremely versatile set of active electronics so you can be ready for any gig. It starts off with an active/passive switch followed by a 3-band EQ, a balance control, and volume. The EQ lets you sculpt the perfect tone for live gigs and studio sessions. No matter what kind of sound you need, the Yamaha TRBX504 bass can get you there in seconds!

Yamaha quality, through and through

The Yamaha TRBX504 bass is covered by the company's Limited Lifetime Warranty. Yamaha has been making world-class instruments for over a century, and they're supremely confident of the quality of the materials and workmanship that goes into their products. You can rest easy that you've made a solid decision in purchasing the Yamaha TRBX504 electric bass guitar!

Yamaha TRBX504 4-string Bass Guitar Features:
  • An extremely versatile bass for all styles of music
  • Fast-action 5-piece maple/mahogany neck with rosewood fingerboard
  • Comfortable mahogany body with progressive styling and deep cutaways
  • Humbucking pickups give you a universe of great bass tones
  • Audiophile-grade active electronics let you dial in the perfect tone
  • Yamaha Limited Lifetime Warranty
Yamaha's TRBX504 bass delivers great sound and amazing playability!

Why Buy Your Guitar from Sweetwater?

See how Sweetwater goes to great lengths to give you the very best online guitar buying experience. From our online Guitar Gallery that allows you to see and select the exact instrument you want to our 55-point Evaluation process and our in-house guitar techs, we take the guesswork out of buying your next guitar online.

Additional Media

Bass Guitar Buying Guide

Tech Specs

Body Shape TRBX
Left-/Right-handed Right-handed
Number of Strings 4
Color Transparent Black
Body Material Mahogany
Body Finish Polyurethane
Neck Material 5-piece maple/mahogany, bolt-on
Fingerboard Material Rosewood, 10" radius
Fingerboard Inlay Dots
Number of Frets 24
Scale Length 34"
Nut Width 1.496"
Bridge/Tailpiece Die-cast bridge
Tuners Die-cast tuners
Number of Pickups 2
Neck Pickup H5 Humbucker
Bridge Pickup H5 Humbucker
Controls 1 x volume, 1 x balance, 1 x bass, 1 x middle, 1 x treble, 2-way passive/active switch
Strings (.045-.105)
Manufacturer Part Number TRBX504 TBL

Customer Reviews

Based on 7 reviews
Write your review

Great instrument & Great Customer Service

I have gone through a handful of basses trying to find the right feel and versatility that I wanted, including 2 American made, high priced models which were both quite disappointing. All things considered, this Yamaha blows them away in every aspect, for 1/3 the price. It is obvious that Yamaha really does their homework to produce high quality instruments. This bass sounds awesome, is about as versital as it gets with the active/passive switch and the eq, built with high quality components, is fairly lightweight and has a perfectly balanced feel. The slim neck design is incredibly comfortable and fast, I love the smooth satin finish of it versus painted or gloss necks, which tend to feel "sticky" to me. Between the awesomely designed pick ups and active EQ this thing produces phenomenal sounds. I play through a Fender Rumble v3 500 and it partners well with this bass. To speak of Sweetwater, I don't think that I will ever buy another instrument elsewhere. Their customer service was amazing, the bass came on time, was packaged with care and was perfectly set up. I really liked the option of choosing the exact instrument that you want out of their stock and being able to view multiple pictures of each individual one before ordering. A nice touch was the sales assistant then sent me all of the studio pictures of the bass that I ordered via email, I know that's not a big deal, but I thought it was a cool touch. Bottom line is that I highly recommend this bass and just as highly recommend that you purchase it from Sweetwater if you want a fabulous experience. I hope someday to get down to their store, it looks incredible!



Great tone and plays great!

Has a deep, punchy tone, yet bright enough to make your playing cut through the mix. The dual humbuckers have a unique sound to them, and you can get more tonal variety out of them than just on split-humbucker, like a p-bass. The active/passive switch is a great feature for a bass at this price point. Altogether this bass is very versatile and sounds much better than any other bass at this price point. Don't be afraid to buy Yamaha. This was my first Yamaha bass and I haven't regretted it. Even though I love the clear tone of a jazz bass, the TRBX model is a whole world of its own. Great quality!
Music background: Piano and Bass player. Bass on!


I love this Bass. The sound is outstanding. The two modes (active and passive) are an extra feature that cannot be overlooked, specialty when playing at church or a concert. The neck is so smooth that is unreal the way it feels. In my humble opinion Yamaha has made one of their best bass line they have and will compete with the Fenders, Gibson and Ibanez. I think by far Sweetwater is the best online music store I have deal with. Also I wanted to thanks Ryan Darmos for all of help he provide me and for his professionalism was outstanding.
Music background: Bass musician for a Church.

Works great!

I've been playing this daily for a couple weeks and enjoying myself immensely! I read a few reports of issues with the active/passive switch, but for me it's worked every time, and silently--there's no pop when I toggle the switch. The electronics must be well-shielded; I hear no hum in locations where my older (unshielded) bass picked up a lot of hum. The only thing I can think of to complain about is a little hiss in active mode, most noticeable if the treble's boosted. The hiss goes away in passive mode. I've verified that passive mode continues to work after the battery goes dead. Out of the box all it needed was a little tuning and it was ready--action felt low, no fret buzz with my playing. It feels comfortable. (I play mostly standing up with a strap.) The controls give a good variety of usable sounds. (But my previous bass was a passive RBX260 with only a single P-style pickup and tone control, and I'll confess to not a lot of experience here.)
Music background: amateur musician
See also: Yamaha, Yamaha 4-string Bass Guitars