The Mayfly Headphone Amplifier is a simple no frills amplifier for your headphones and earbuds. It's Stereo, has a small form factor (3.6" x 1.5" x 2"), a TRS input, a headphone output, and a volume control.  That's it.  No gimmicks or features you don't need - and don't need to pay for. 

Some notable things:

1. It's not an amp simulator - it's a HiFi headphone amp. It's designed to amplify exactly what's put into it - with no colouration.
2. It has a mono switch. In mono mode it runs the left channel (tip) to both ears.
3. The headphone jack is on the face - exactly where you want it. No digging around the side to plug it in.
4. It has a through output jack directly wired to the input jack. You can insert it in the middle of your signal chain. Kind of like a Y-chord with one leg being able to drive headphones.
5. It's high impedance - it won't load down your signal.

Small, simple, perfect. The Mayfly Headphone Amplifier.

• High quality, high fidelity, stereo headphone amplifier.
• Stereo volume control.
• Small form factor: 3.6" x 1.5" x 2" (92mm x 38mm x 50mm).
• Headphone output jack on the face.
• Mono switch - runs the left channel (Tip) to both ears.
• Through output jack (directly wired to the input jack).
• High input impedance - won't load your signal.
• 9V DC input. 30 mA.