Grado SR80e with AudioQuest DragonFly

Audiobot Notes
Peak SPL	120.8 dB
Damping factor	49.2

Popular Combos for DragonFly
Sennheiser HD 650
Beyerdynamic DT 990 Edition (250 Ω)
HiFiMAN HE-500
HiFiMAN HE-400i
Audio-Technica ATH-AD700X

Grado SR80e

Impedance	32 Ω
Efficiency	99.8 dB SPL/mW
Frequency Response	20 - 20,000 Hz
Transducer Type	Dynamic
Operating Principle	Open
Ear Coupling	On-ear
Additional Notes
"Grado has taken one of the world's most legendary headphones and made it even better. The SR80e has a new driver design, a new polymer to damp resonant distortion in the plastic housing, and a new cable from plug to driver connection. The way the SR80e's new driver and plastic housing move air and react to sound vibrations virtually eliminate transient distortions. This allows the signal flow over the new cable to reproduce sound that has improved tight control of the upper and lower range of the frequency spectrum, while supporting Grado's world renowned midrange. The SR80e will produce a sound that is pure Grado, with warm harmonic colors, rich full bodied vocals, excellent dynamics, and an ultra-smooth top end."

AudioQuest DragonFly

Output Impedance	0.65 Ω
Power Output	125 mW at 32 Ω
Portable
Additional Notes
"The heart of DragonFly is the 24-bit ESS Sabre™ conversion chip, a high-performance solution that’s typically found in better CD and Blu-ray Disc™ players. DragonFly can accept audio and music files ranging from MP3s and CD-standard 16-bit/44kHz to native 24-bit/96kHz high-resolution, regardless of music file format. If your computer’s software can recognize and play a format, DragonFly will make it sound its best."