User Manual

150 Watt Audio Amplifier
© 2007 Dayton Audio
®
Dayton Audio
©
•
PO Box 52
•
Springboro, Ohio 45066
300T812
APA150
Specifications:
Power Output: 75 watts RMS x 2 into 4 Ω
150 watts RMS x 1 into 8
Ω
Total Harmonic Distortion: Less than 0.01%
(20-20,000 Hz)
Signal-to-Noise Ratio: >100 dB, unweighted
Crossover: Variable 50-150 Hz,
18 dB/octave
Auto-On Sensitivity: 3 mV
Auto-Off Delay Time: 15 minutes
Input Impedance: 47 k Ω ±5%
Line-Out Frequency Response: 20-20,000 Hz (-3 dB)
Maximum Noise and Hum: Less than 1 mV with gain at maximum
and input shorted
Minimum Clearance for Ventilation: 2”
Electrical Requirement: 120V 60 Hz, 230V 50 Hz (switchable)
Dimensions: 5.6” H x 5.7” W x 12.8” D
Weight: 11.05 lbs
Warranty
The Dayton Audio APA150 warranted free from defects in material and
workmanship for one year from date of purchase. Warranty does not apply
to misuse, abuse, neglect, accident, improper use, etc.
Notes About Hum
The addition of a new component to an existing system can sometimes result in an
audible hum. While it would be easy to assume that the new product is at fault or even
defective, it is usually just an indicator that it is time to take a closer look at the overall
grounding of the audio system. To start with, verify that all audio equipment is on the
same AC power circuit. The outlets in an area may or may not all be on the same breaker.
Always make sure that all equipment grounds are in good condition, and NEVER remove
the ground pin from a power plug. There are some cases where the actual power line has
some form of interference, but the most common cause of noise is a ground loop. The
cable TV line can be the cause of hum in multi-source home audio/video systems. Just
temporarily disconnect the cable line, and if the hum stops then the use of an inline isola-
tion transformer is suggested. The key is to proceed slowly and step by step, taking care
to identify which cables or combinations of cables cause noise when connected.