[WTS][USA-OH][H] Monoprice Liquid Platinum balanced hybrid tube amp, Hifiman HE4xx, HE560, Audio-Technica ATH-M40x, Sennheiser XLR cable, Hifiman XLR cable [W] Paypal
Narrowing the focus of my collection after scoring a pair of HE6SEs for Christmas.
Monolith x Alex Cavalli Liquid Platinum balanced hybrid tube amp. Comes with two pairs of tubes, Amperex Mullard and GE. Both pair work and sound fine, I preferred using the Amperex tubes personally. Only issue with this amp is the power switch is stuck in the "on" position. It's digital and for some reason they fail in some of the units. I used a remote power switch to power and unpower the device, bypassing the issue. The soft start does work correctly. $300 shipped.
HE4xx - 2.5mm connectors. Has a pair of Brainwavz pads, heavily angled. Your choice of the two cables I have 3.5mm or 1/4". $100 shipped.
HE560 v1.2 - 2.5mm connectors. Has a pair of replacement leather pads, slightly angled. I think they're Lawton pads but I can't swear to it. They definitely aren't Brainwavz. Your choice of the two cables I have 3.5mm or 1/4". $150 shipped.
Sennheiser HD580/600/650/6xx/others? to XLR cable. It's short - 1m if I measured correctly. I got 41 inches, calculator says it should be ~39. $15 shipped, free with any other purchase.
AT M40x with leather earpads. Based on the stitching, I'm assuming Brainwavz but I won't swear to it. Cable on it is properly locking, 3.5mm. $80 shipped.
Dual 2.5mm to XLR cable. 3m. Used with both pairs of the Hifiman headphones listed above, will work with many others. $50 shipped.
All prices are OBO and I'm open to cutting a deal if you buy more than one thing.
Posted Feb 18, 2026, 2:25 AM UTC