Calton Mandolin Case (Used) Over Ear Headphones The original Groove Tubes were

The original Groove Tubes were swapped out at some point for some Tung Sol 12AX7 preamp tubes and some Electro Harmonix EL84 power tubes

while chords will be rich with sparkly midrange harmonics

Dual channels allow you to plug in mics and instruments and sound great immediately

• Output Impedance: 1 kOhm

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Calton Mandolin Case (Used) Over Ear Headphones The original Groove Tubes wereUsed Calton Mandolin case from when they were made in Canada. Fits both A style and F style mandolins snuggly. Features a red exterior, black interior, 3 latches and a custom sticker job. If you want peace of mind and the best protection for your instrument this is it.