Slim1970

Headphoneus Supremus

• 

  Slim1970

• Feb 9, 2023
• Price Drop!! Burson Soloist 3X GT w/upgraded op-amps and Super Charger
• Positive
• John Massaria was the buyer in this interaction.

Quick and easy transaction. Excellent communication, payment sent immediately. Great buyer I'd do business with again any time, thanks!

David A Silva

500+ Head-Fier

• 

  David A Silva

• Dec 13, 2022
• RSD 1966-67 ecc82 dual thick supports nib
• Positive
• John Massaria was the seller in this interaction.

Excellent communication, quick shipping, well packed. Excellent NOS tubes! 5/5 seller!

trellus

Headphoneus Supremus

• 

  trellus

• Dec 5, 2022
• Fire sale ! 3 sets of wire Hifiman R10 OEM
• Positive
• John Massaria was the seller in this interaction.

One of the best! A pleasure to deal with, great price on three hard-to-get cables! Friendly and shipped promptly.

Voxata

Headphoneus Supremus

• 

  Voxata

• Oct 16, 2022
• Ether CX + Extras
• Positive
• John Massaria was the buyer in this interaction.

Great buyer. Friendly, quick payment and A+ Head-Fi'er!

UltimaVZekken

New Head-Fier

• 

  UltimaVZekken

• Jul 26, 2022
• Tung Sol JTL 12AU7 Matched Pair w/ Hard Cary Case
• Positive
• John Massaria was the seller in this interaction.

Awesome seller. Packaged amazingly and shipped fast. Would recommend 10/10.

I

Idiosyncrat

New Head-Fier

• I

  Idiosyncrat

• Jun 15, 2022
• HIFIMAN HE-R7DX+DROP+JM OCD MOD Closed-Back Modded By JM
• Positive
• John Massaria was the seller in this interaction.

Wonderful seller and modded! I can’t believe he did all these mods for a $150 headphone. Thanks!

FiGuY1017

500+ Head-Fier

• 

  FiGuY1017

• May 31, 2022
• HE-R7DX JM OCD Extreme Stealth Edition
• Positive
• John Massaria was the seller in this interaction.

Great seller and what a fantastic mod, sitting here enjoying them now! Highly recommend, and a great guy as well!

P

Pansbjorne

100+ Head-Fier

• P

  Pansbjorne

• May 26, 2022
• DROP+HE-R7DX JM OCD Extreme Stealth Edition
• Positive
• John Massaria was the seller in this interaction.

Great seller, shipped out asap. Even better headphone modder

squeakez

100+ Head-Fier

• 

  squeakez

• May 23, 2022
• HIFIMAN HE-R7DX+DROP+JM OCD MOD Closed-Back Modded By JM
• Positive
• John Massaria was the seller in this interaction.

John really went above and beyond on this transaction. What a great guy to deal with and an excellent mod. Thank you!!

rodel808

100+ Head-Fier

• 

  rodel808

• May 13, 2022
• HIFIMAN HE-R7DX+DROP+JM OCD MOD Closed-Back Modded By JM
• Positive
• John Massaria was the seller in this interaction.

Package arrived 3 days earlier. Trust worthy to pay with PayPal friends and family.