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Modular Series
Line 2CRM Stereo Line Preamplifier
PS 2D Power Supply
Line 2CR M P r e amplifie r
User's Manual
Rev. Dec 6, 2019
Mapletree Audio Design
R. R. 1, Seeley's Bay, Ontario, Canada, K0H 2N0
(613) 387-3830
www.mapletreeaudio.com
info@mapletreeaudio.com
-Specifications are subject to change without notice-
© Copyright Lloyd Peppard 2002-2019
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Summary of Contents for Mapletree Line 2CRM
- Page 1 Modular Series Line 2CRM Stereo Line Preamplifier PS 2D Power Supply Line 2CR M P r e amplifie r User’s Manual Rev. Dec 6, 2019 Mapletree Audio Design R. R. 1, Seeley's Bay, Ontario, Canada, K0H 2N0 (613) 387-3830 www.mapletreeaudio.com info@mapletreeaudio.com...
- Page 2 Introduction The Mapletree Audio Design Line 2CRM Stereo Line Preamplifier offers the audiophile a number of desirable features: Remote volume control with handset. Bypass switch on front panel for home theatre (HT) operation. Exclusive use of NOS octal tubes, known for low distortion and musicality.
- Page 3 Power Supply Connections______ The Mapletree Audio Design PS 2D power supply provides +12 VDC (regulated) heater supply voltage and +200 VDC B+ plate supply voltage at a current of 15 mA (see specifications). It utilizes ultra high-speed diode bridge rectification to achieve low noise and high efficiency.
- Page 4 If the fuse blows, you should not try to operate the unit. Contact Mapletree Audio Design for information Signal I/O Connections____ __ The signal input/output jacks are located on the rear panel of the preamplifier chassis. RCA jacks are provided for three line inputs and two line outputs. The outputs can be used for bi-amp operation, connection to a headphone amp, or to the front channel inputs to a home theatre (HT) system.
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Page 5: Front Panel Controls
Front Panel Controls The front panel controls are (left to right) the 3-position Source selector switch (Line1- Line2-Line3), Mode switch (Stereo or HT), Volume control, and Balance control. In HT mode, the selected input source is connected to the output jacks and the active preamp output is disabled;... - Page 6 (excluding tubes) and workmanship. Tubes are warranted for 90 days exclusive of shipping cost. Service, including parts and labor (but excluding shipping), is free within the warranty period. Line 2CRM Specifications______ Frequency response (1 V output, 100K load): 20 Hz–20 kHz –0.3 dB (any volume control setting) Max.