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Notes about Hum
While this amplifi er has been designed to minimize the possibility of hum, it is still possible that a hum will occur
in rare circumstancs. Its safety grounding can create a path for small amounts of 60 Hz energy to travel through the
line-level audio system. While not dangerous, this energy can interfere with the quiet enjoyment of your system.
Th
e fi rst course of action should be trying to make sure that all of the audio components are connected to either
the same electrical outlet, or at least into the same circuit branch. Next, cable TV systems are notoriously the cul-
prit, so be sure to try disconnecting all coaxial feeds that are connected to the system. If this solves the problem,
install a coaxial line isolator and reconnect the system. In the very worst case, a line-level audio isolator/transform-
er connected to the line-in of the subwoofer amplifi er will usually solve the problem.
Warranty
Th
is product is warranted for the period of one year. Th
is warranty is limited to manufacturer defects, either in
materials or workmanship. In the rare case of a product failure, please contact Blumenstein Audio.
Th
e warranty will not cover incidental or consequential damage due to defective or improper use of products. Th
is
includes but is not limited to overheating, bent frames, and broken componentry.
Non-Warranty Service: If non-warranty service is required, the product may be sent to Blumenstein Audio for
repair/replacement, transportation fees prepaid, by contacting Blumenstein Audio directly for details, complete
instructions, and service charges.
Technical Specifi cation
Rated Power Output
15 watts RMS into 8 ohms @ 0.1% THD
Signal to Noise Ratio
90 dB A-weighted
Input Impedance
10.4K ohms
Low Pass Adjustment
60 Hz -180 Hz
Power Requirements
120 VAC, 60 Hz, 48W
Physical
Dimensions
11-1/4” H x 11-1/4” W x 8 1/2” D
Material
Birch ply, Chocolate Bamboo, or Natural Bamboo
Weight
Birch: approx. 17; Bamboo: approx. 18
