A new Ti:sapphire ultrafast laser amplifier from Coherent Inc., the Legend Elite Duo-HP, offers >15 W of output power and pulse energy of up to 10 mJ. The kilohertz-class thermoelectrically cooled amplifier can be configured to provide output pulse durations of <25 fs, <35 fs, <130 fs or 0.5 to 2 ps with repetition rates ranging from 1 to 10 kHz. The system incorporates two stages of amplification: a regenerative amplifier followed by a simple single-pass amplifier. This approach ensures good beam quality, stability and efficiency compared to designs based on multipass amplification. Applications span several areas of research, including time-resolved spectroscopy using multiple optical parametric amplifiers, terahertz generation and high-field physics.