If you have D50s and a high-resolution audio system, you'll definitely appreciate the sound improvement. It didn't affect the A50 with Sundaras and U12T in any way to my ears, but it does make the D50 smoother at high frequencies, with a larger soundstage and more organic sound compared to an external battery. The D50's are much better now, and the most obvious difference I've noticed is on my Emotiva AMP amp with B&W 603 speakers.
Denon PMA-800NE Hi-Fi Stereo Integrated Amplifier, 85W x 2 Channels, Built-In Phono Pre-Amp, Analog Mode, Advanced High Current Power, Black
20 Review
Silver 160W Stereo Digital Amplifier With Power Adapter - S.M.S.L SA-98E For Enhanced SEO
15 Review
Nobsound Dual TPA3116 Digital Power Amplifier - High-Fidelity Stereo Amp With NE5532P Pre-Amp, Audiophile-Grade 2.0 Channel And 100WΓ2 Output (Black)
13 Review
Experience Hi-Fi Amplification and Alexa Compatibility π with Denon DRA-800H Network Receiver for Home Theater
15 Review
JBL Horizon Bluetooth Alarm Clock Radio with Multiple Alarms, Soothing Ambient LED Light, Automatic LCD Display, and Dual USB Charging (White, AM/FM Radio)
41 Review
AUNA Connect 150 Black 2.1 Wi-Fi Internet Radio Music Player With MP3 USB Port, AUX & Remote Control - Black
16 Review
Experience Dynamic Audio with Panasonic SC-UX100 CD & USB Wireless Bluetooth 300W Mini Hi-Fi System Shelf Stereo
19 Review
Stream Your Favorite Tunes With AUNA KR-200 SI Internet Kitchen Radio - Spotify Support, Remote Control, And More!
15 Review