Marantz 14 - Marantz Amplifier Technical Specifications; Marantz Amplifier Servicing Test Equipment

TECHNICAL SPECIFICATIONS
Input Signal for Rated Power Output. . . . ... 1 volt rms
Input Impedance .. 100K ohms
Frequency Response . . Within 1 db, 10 to 60 KHz.
Power Output, 20 Hz to 20,000 Hz (each channel). 70 watts rms at 4 ohms load
Damping Factor ......... .
Overload Recovery ........ .
Total Harmonic Distortion ..
60 watts rms at 8 ohms load
40 watts rms at 16 ohms load
. . Greater than 150 with 8-ohm load
. ................ Instantaneous
. Less than 0.1 % with 4 to 16 ohm load-
typically 0.03% with 8-ohm or higher
load-at full rated output, at any fre-
quency from 20 to 20,000 Hz. Distortion
decreases as output level is lowered.
Total Noise (shorted input broadband). . Better than 90 dB below
Power Bandwidth~' ........... .
Continuous output at mid-frequencies':'
Dynamic (music) output at mid-frequencies':'
Difference in frequency response~'.
Power Requirements':":'
60 watts into 8 ohms
. 8 Hz to 60 KHz at 8 ohms
. 70 watts at 8 ohms
85 watts at 8 ohms
±0.05 dB
..... 105 to 135 volts
50 to 60 Hz.
240 watts
Dimensions .................................... 15-3/8 inches wide
5-3/4 inches high
8 inches deep
Weight (as shipped) . Model 14-18 pounds; Model 15-34 pounds
~• From IHF Standard (IHF-A-2011966)
~• ~• Split primary windings permit adaptation to 210-270 volts
Specifications subject to change without notice
TEST EQUIPMENT REQUIRED FOR SERVICING
Table I lists the test equipment required for servicing the Model 14 and 15
Solid State Amplifiers. The trim box listed in the table must be fabricated from
the components shown in the schematic diagram, figure 1.
TABLE I. TEST EQUIPMENT REQUIRED
Distortion Analyzer ...................... Hewlett Packard 331A or 333A
Audio Oscillator . . . . . . . . . . . . . Hewlett Packard H20-200CD
Oscilloscope . . . . . . . . . . . . . . . . . Tektronix 503 (or equal wideband)
RCA Senior Volt-Ohmyst . . . . WV-98C
2 Load Resistors . . . . . . . . . . . Dale NH-250 (8 ohms ±0.5 % , 250 watts)
Wattmeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Simpson Model 390
Trim Box . . . . . . . . . . . . . . . . . . . . . .................. See figure 1
3