https://www.audiogon.com/listings/tube-mapletree-audio-line-2b-ht-line-preamplifier-with-ht-bypass-2016-02-02-preamplifiers-30248-locust-grove-gaOriginal owner. Excellent sonic and cosmetic condition. Used it in a rotation. Low hours on pre and tubes.
Will accept personal checks, cashiers checks and money order. Discount given for these forms of payment.
The Mapletree Audio Design Line 2B SE Stereo Line Preamplifier Compact chassis layout for use with separate tube rectified power supply for low noise.
A very nice 6SN7 line level preamp with NOS tubes. Exclusive use of NOS 12SN7GT octal tubes, known for low distortion and musicality.
Heater voltage switch for use of 6SN7GT tubes if desired.
Low output impedance (less than 500 Ohms).
Parallel output jacks. (Two sets)
Three sets of input jacks
Individual channel level controls with up to 10 dB attenuation.
UPGRADES INCLUDE:
Premium Auricap XO Capacitors
Alps Blue Velvet volume control.
NOS RCA 12SX7 tubes
One Rca 6x5 Rectifier
Specifications:
Frequency response (100 k50 pF load, 1 V output): 12 Hz–20 kHz –0.5 dB
Maximum input voltage: 5 V (rms)
Voltage Gain (100 k load, 1 kHz): 10 dB (standard configuration)
Level control range: 0 dB to –10 dB
Output impedance (1 kHz): 450
Input impedance (1 kHz): 100 kfor 10 dB gain configuration; 20K for 20 dB gain
Hum and noise at output (max volume): less than 200 V rms
Phase: Inverting
Power consumption: 20 W
At my asking price I will include an extra set of NOS 12SN7 RCA black glass tubes and the herbie labs tube dampers shown.
