Symphony No. 4 - Brahms
Johannes Brahms (1833-1897), was a German composer of the Romantic era who used trombones sparingly but strategically.
In Brahms’s Symphony No. 4 in E minor, Op. 98 (1885), the three trombones appear exclusively in the fourth movement, where Brahms reserves them for the opening ominous chorale theme (adapted from Bach - derived from a bass line in Cantata BWV 150).
To learn more about the composer, visit Johannes Brahms on Wikipedia.
For more on the composition, visit Brahms Symphony No. 4 on Wikipedia.
Performance
Brahms: 4. Sinfonie ∙ hr-Sinfonieorchester ∙ Andrés Orozco-Estrada
Excerpts
Brahms Symphony No. 4 audio excerpts are available on tromboneexcerpts.org.
Trombone Parts and Full Score
The full score of Symphony No. 4 is available on IMSLP.org.
NOTE: IMSLP provides access to public-domain scores and parts, with copyright status varying by country. Users are responsible for observing applicable copyright laws.
Trombone parts are available on IMSLP.org as follows:
Ranges and clefs by Part
More Brahms
Trombone Resources playlist of Brahms with Trombones in the instrumentation.