AudioFu Chart · November 2026
Best Bach Tenor Trombones with F-Attachment 2026
The top pick is Bach 42BO Stradivarius Series Tenor Trombone w/ Open Wrap F… ($5,025). Bach TB-450B Bb/F-Trombone gives you the most for the money at $1,853. Ranked by the AudioFu Index from 7 models, prices checked every night.
Last updated: November 2, 2026
Top 7
Full detail for the 7 highest AudioFu Index scores. Every other model is listed below.
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Bach 42BO Stradivarius Series Tenor Trombone w/ Open Wrap F…
42B Bb/F-Tenor Trombone · Bach
19 for sale on Reverb3 finishes at Thomann
- Size8.5"
The 42B is a workhorse – a classic for a reason. It’s got that quintessential Bach tone, powerful and projecting, with a responsive feel that’s fantastic for both orchestral and lead playing. This is a serious instrument for the advanced student or professional who wants a reliable, great-sounding horn.
Pros
- Exceptional projection and resonance thanks to the 8.5in brass bell.
- Traditional wrap offers a responsive, quick-feeling slide action.
- Nickel silver inner slide ensures smooth, reliable operation for years.
Cons
- The traditional wrap design can feel a bit cumbersome for smaller players.
- Premium-priced, representing a significant investment for many trombonists.
79AudioFu
IndexStableno change since Aug 17Aug 17$5,025 now$5,025€4,498 at Thomann · in stockCheck price ↗ -
- Size8.5"
This tenor trombone has a gold brass bell and a special F valve for more notes. The open-wrap slide moves smoothly, and the nickel-silver grip feels solid. It comes with a wooden case and a standard Bach mouthpiece. It fits players who want extra range without changing their setup. The missing weight and bore details make it hard to know exactly how it plays.
Pros
- Open-wrap slide construction offers smooth movement
- Gold brass bell adds bright top-end projection
- Quart valve system provides extra range options
Cons
- Lack of stated slide weight makes it hard to judge
- No bore size listed prevents checking internal scale
54AudioFu
Index↓ 7.0%since Aug 17 · lowest so far$5,641 · Aug 17$5,249 now$5,249€4,698 at Thomann · in stockCheck price ↗ -
Bach 36BO Stradivarius Series Tenor Trombone w/ Open Wrap F…
36BO Bb/F-Tenor Trombone · Bach
3 for sale on Reverb1 finish at Thomann
- Size8"
This trombone uses an open wrap slide to feel very direct when you play. The nickel silver inner slide keeps the action smooth, and the F-attachment makes changing keys quick. It comes with a case and mouthpiece, so you have everything needed to start. Great for players who want a solid, traditional feel without extra cost.
Pros
- Open wrap slide design for smooth, direct response
- Dual F-attachment allows easy key changes
- Nickel silver inner slide reduces friction
Cons
- Brass bell may sound brighter than silver
- No weight listed makes shipping hard
50AudioFu
IndexStableno change since Aug 17Aug 17$5,025 now$5,025€4,498 at Thomann · in stockCheck price ↗ -
- Size8.5"
This A47I Artisan 'Infinity' is a serious instrument built for the advanced player. The unique Infinity valve and hand-hammered bell combine to produce a powerful, resonant sound with incredible response. It’s ideal for orchestral players and soloists who demand the highest level of performance and are willing to invest in a truly exceptional horn.
Pros
- Infinity valve offers exceptionally smooth, responsive action minimizing resistance.
- Hand-hammered bell delivers a rich, focused tone with surprising projection.
- Modular system allows for fine-tuning of slide and valve adjustments.
Cons
- The open-wrap design might be overly bright for some players’ preferences.
- Premium-priced, representing a significant investment for most trombonists.
48AudioFu
IndexStableno change since Aug 17Aug 17$7,260 now$7,260€6,498 at Thomann · in stockCheck price ↗ -
- Size8"
This tenor trombone combines a traditional wrap build with a modern lightweight slide for easy handling. Its large bore and big gold brass bell give it a strong, open sound perfect for big bands. The set includes a mouthpiece and case, making it a ready-to-play option for serious players.
Pros
- Lightweight slide design makes the trombone easy to carry and maneuver
- Traditional wrap construction offers a classic feel for the player
- Large bore size allows for a powerful and open sound
Cons
- No specific weight measurement is listed in the description
- Limited features compared to high-end modern trombones
44AudioFu
IndexStableno change since Aug 24Aug 24$5,472 now$5,472€4,898 at Thomann · in stockCheck price ↗ -
- Size8.5"
The 42AF Axial is a serious step up, delivering a powerful and focused sound with exceptional valve response. It's ideal for advanced players and professionals who demand precision and projection – think lead players in jazz ensembles or orchestral settings. The Axial valve design really sets it apart, making it feel incredibly modern despite its traditional brass construction.
Pros
- Axial valves offer exceptionally smooth, responsive action.
- 8.5in brass bell provides a rich, resonant, and projecting tone.
- Nickel silver interior slide ensures smooth, consistent playability.
Cons
- The 0.547in bore may feel a bit tight for some players.
- Premium-priced, representing a significant investment for most.
44AudioFu
IndexStableno change since Aug 17Aug 17$5,584 now$5,584€4,998 at Thomann · in stockCheck price ↗ -
This Bach 450B is a fantastic all-around tenor trombone – a real workhorse. The German craftsmanship delivers a reliable, responsive instrument with a warm, focused tone, making it ideal for students and intermediate players looking to step up their game. It’s a solid choice for orchestral, band, and even some jazz applications.
Pros
- Excellent intonation across the full range, thanks to precise manufacturing.
- The open-wrap design offers a quick, responsive feel for agile playing.
- German-made construction ensures exceptional durability and consistent quality.
Cons
- The heavier build might fatigue players during extended performances.
- The lacquer finish, while attractive, can be prone to wear over time.
41AudioFu
IndexStableno change since Aug 17Aug 17$1,853 now$1,853€1,659 at Thomann · in stockCheck price ↗
Tenor Trombones with F-Attachment by the numbers
Measured across all 120 models we track, not a sample.
Median $5,360 — half of all tenor trombones with F-Attachment here cost less.
median of 34 models · 5"–8.5"
median of 6 models · 1.1 kg–1.72 kg
How to choose the best tenor trombones with F-Attachment
Heritage & Model Lineup
Bach's lineage is a big deal. The 43B, 50B, 63B - each represents a different design philosophy, from the bright, responsive 43B to the darker, more powerful 63B. Understanding these distinctions is crucial to finding the right fit.
Tone Characteristics
That 'Bach sound' is often described as rich and resonant, but it's more nuanced than that. The 43B leans towards a brighter, more articulate tone - great for lead work and cutting through a brass section. The 63B has a warmer, darker timbre with a more substantial low-end thump, ideal for background work and soulful playing.
Valve Section & Response
The F-attachment valve is a critical component. A well-tuned valve will respond quickly and accurately, allowing for seamless transitions and precise articulation. Sloppy valve action will kill your intonation and make complex passages a nightmare - especially in a tight ensemble.
Slide Construction & Action
Bach slides are generally well-built, but the action can vary. A smooth, consistent slide is essential for effortless playing and a consistent tone. Look for a slide that moves freely without feeling gritty or sticky - this is where cheaper copies often fall apart.
Bell Bracing & Material
The bell's material (usually yellow brass or red brass) and the bracing pattern significantly influence the horn's projection and tonal color. Yellow brass tends to be brighter and more responsive, while red brass provides a darker, warmer sound. The bracing affects how the vibrations resonate.
Buying guide
Alright, so you're looking at a Bach tenor trombone with an F-attachment - good choice. It's the workhorse for a reason. Whether you're cutting through a big band, laying down soulful lines in a jazz combo, or just wanting a versatile horn for practice, a Bach F-attachment is a solid starting point, but there's a lot of variation within the Bach lineup. Let's break down what makes them tick and which ones are actually worth the investment.
Don't chase the newest model; vintage Bachs, especially those from the 1950s and 60s, often have a magic about them - better slide tolerances, more consistent manufacturing. Be prepared to spend a little more on a horn that's been properly maintained. A good repair tech can often breathe new life into an older Bach, and it'll be cheaper than a brand new, higher-end model.
Watch out for dents and damage to the slide - those are a pain to repair and will affect the action.
How the AudioFu Index works
Five measured signals and nothing else — no stars from strangers, no “tested by experts” we didn’t do. The weights are fixed and public. We don’t play these instruments; we measure the market around them.
This chart covers 13 tenor trombones with F-Attachment from the Thomann catalogue (of 120 in the category). Before you buy, read hands-on reviews and, where you can, play it. Full methodology.
AudioFu earns a commission when you buy through our Thomann links. It never changes the order — the index does.
- Demand40%
How many of this exact model are for sale on Reverb right now — what musicians actually buy and resell.
- Lineup20%
How many finishes Thomann stocks — makers expand the models that sell.
- Price15%
Where the price has moved since we started tracking in August.
- Specs15%
How completely the maker documents it.
- Maker10%
How deep the brand’s range is in this category.
Questions
What's the difference between a 43B and a 50B?
The 43B is generally brighter and more responsive, geared towards lead playing. The 50B is a bit more mellow, with a slightly darker tone and a more open feel. It's a good all-around choice.
Are vintage Bach trombones worth the hype?
Often, yes. Manufacturing tolerances were tighter back then, and the materials were consistently high quality. However, condition is key - a beat-up vintage horn might be worse than a well-maintained newer model.
My Bach 43B feels a little too bright. How can I tame it?
Try different mouthpieces! A darker mouthpiece will mellow the tone considerably. Also, experiment with your embouchure - a slightly more relaxed approach can help soften the attack.
What's the deal with the different bell sizes?
Larger bells generally produce a louder, more projecting sound, while smaller bells offer a more focused and controlled tone. It's a subtle difference, but it can impact your overall sound.
I'm a beginner. Which Bach should I get?
A used 43B is a great starting point. It's responsive, relatively affordable, and will teach you good technique. Don't break the bank - a good teacher is more important than an expensive horn.
