Mapletree Audio Design- Combo tube headphone amp/line preamp - Ear Four
Will Ship To: Anywhere
Approximately 10 years old, factory build. From the manual: Cathode -follower headphone circuit cable of driving headphones with impedance from 32- 300 ohms. Switchable cathode follower line output with gain of +20db. Vacuum tube rectification and DC heater power supply. Four tube compliment - 5751/12AX7/ECC83- Yugoslav Ei currently ; 2- 12B4A GE ; 12X4- Sylvania. Has balance control and volume control - however balance control has been removed from circuit to increase gain- easily switched. Rear panel has toggle switch for headphone vs. line preamp function. Comes with manual and circuit diagram. Messy paint around label - see macro picture - rated 7/10 -only noticeable close up - otherwise fully functional. Shipping at cost from W. Canada with tracking and insurance via postal service Not recommended for IEM's or high impedance 'phones . Also have QED passive MA20 2 way input expander available which could be combined to make this a full line preamp for an extra $40. Paypal (+fee) or email money transfer in Canada or international postal money order. Not considering trades at present- thanks
Just ran it to test everythng with my Beyerdynamic DT250's - Volume pot is silent, no tube rush,12 to 1 o'clock rocks the Beyers - tubes have low miles as I used other rigs much more extensively.
Edited by buzzinghive - 3/17/14 at 11:08am