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Yamaha YBL631H
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4 8179
Recommended By Average Price Average Rating
100% of reviewers $2,400.00 8.8


This very popular bass trombone provides darker sound suited to symphonic playing.
Inner slide

The chrome-plated, nickel-silver, drawn inner slide is very durable and has a quick, sensitive response.

Outer slide

The one-piece, drawn, yellow brass outer slide maintains an accurate diameter throughout its length. This type of construction ensures airtightness, smooth action, and exceptional durability and offers improved response.

Inner slide stockings

Specially designed, one-piece, inner slide stockings guarantee airtight slide construction, and offer smoother slide action and better alignment, even in the extended 6th and 7th positions.

Tubular braces

Long-lasting, nickel-silver tubular braces contribute to the stability of the slide and enhance smooth slide action.

Pressure formed tubing

Perfectly rounded tubing results in less turbulence and a smoother air flow, thus allowing for an excellent scale and reduced resistance.

Laser-fused pluzuma welded bell

A high-energy laser fuses the brass together for a virtually seamless bell which allows continuous even vibrations.

Slide Lock

The unique slide lock design on all Yamaha trombones keeps the slide locked in place and keeps it from accidentally falling.


The large, easy-to-hold, nickel-silver bracing guards against possible slide damage if the instrument is dropped and also lessens fatigue while playing.


Yamaha trombones have mouthpipes featuring special acoustic designs allowing for precise intonation and greater blowing control.

Hand-hammered one-piece bell

A one-piece bell has an axial (lengthwise) seam, making it a continuous extension of the instrument's material. This results in pure, uniform resonance and superior tone. A hammered gold brass bell produces a slightly more broad and rich, yet perfectly-balanced tone with quick response and extra presence due to advanced manufacturing techniques.

Key Bb/F/Eb
Bore .563"
Bell 9-1/2" gold brass bell
Slide The inner slide of the YBL-631H is chrome-plated yellow brass. The outer slide material of the YBL-631H is yellow brass. The gold brass is leadpipe is extremely resistant to wear and corrosion, and when used in a leadpipe, it ensures long-term precision
Valve System Traditional In-line independent rotors with moderate open wrap tubing.

Standard Features

Heavy wall construction
Large shank mouthpiece receiver
One-piece bell
D slide included
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Bore (inch): 0.563
Bell (inch): 9.500
Key: Bb/F/Eb
Bell material: Gold Brass
Website: http://www.yamaha.com
Keywords: Yamaha YBL631H
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Review Date: 3/18/2006 Would you recommend the product? Yes | Price you paid?: None indicated | Rating: 10 

Pros: Fantastic quality and flawless slide
Cons: none

Absolubtly 1st class. Just as good as most custom horns out there!

Plays amazing, beautiful sound and tone. Flawless quality and glassy mooth slide. Perfect valves, no need for free flow valves, these are just as good.

I reccomend this horn 100%.

It surprised me when I first played it as I though it would just be any old horn, but it is something really special, Yamaha definately have come up with the perfect formula!
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Review Date: 3/18/2006 Would you recommend the product? Yes | Price you paid?: None indicated | Rating: 9 

Pros: everything
Cons: nothing

Just perfect!! As good as anything twice the price or more!!

You have to try one to realise how good they really are!

Awesome instrument!!!
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Review Date: 4/25/2006 Would you recommend the product? Yes | Price you paid?: $2,400.00 | Rating: 9 


I'm currently a college student using this horn. I've had it for about 5 years now, and it has never let me down. I might have oiled the valves once when I first got it, but not since. They just don't stick.

The slide is smooth as long as you clean it ever so often. I use Slide-o-mix, and that works great as well.

What pleases me most about the horn is that it plays as well, or better, than Bachs, Conns, and even Edwards horns that I have played. Especially with the Edwards, a horn that seemed very stuffy to me.

If you want a good bass, this is definately the most price effective one I have found. If you're a tuba player also, don't get a Miraphone. I had similar problems as the Edwards. Get a St. Petersburg.
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Review Date: 8/20/2008 Would you recommend the product? Yes | Price you paid?: None indicated | Rating: 7 

Pros: Quick response
Cons: Tone in lower & upper

Ok horn. Found that the sound breaks up in the lower & upper register. Smaller mouthpiece helps (Bach 2G). Good slide & valves. Feels like an extra large bore tennor trom.
Fine for concert bands but not for orchestras.
Much prefer my old Elkhart Conn 72H.
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