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 GFA-5400 SPECIFICATIONS

Power Rating (To FTC Requirements)

125 watts continuous average power per channel into 8 ohms at any frequency between 20Hz to 20kHz with
all channels driven at less than  0.18% THD
200 watts continuous average power per channel into 4 ohms at any frequency between 20Hz to 20kHz with
all channels driven at less than 0.18% THD

IM Distortion (SMPTE)

1 watt to 125 watts into 8 ohms ............................................................................................................................. 

 0.05%

1 watt to 200 watts into 4 ohms ............................................................................................................................. 

 0.05%

IM Distortion (CCIF, Any Combination from 4kHz to 20kHz)

125 watts into 8 ohms .......................................................................................................................................... 

 0.035%

200 watts into 4 ohms .......................................................................................................................................... 

 0.035%

THD + Noise at 130 watts into 8 ohms (Typical)

20Hz ....................................................................................................................................................................... 0.018%
1kHz ......................................................................................................................................................................... 0.02%
10kHz ....................................................................................................................................................................... 0.07%
20kHz ....................................................................................................................................................................... 0.14%

THD + Noise at 200 watts into 4 ohms (Typical)

20Hz ....................................................................................................................................................................... 0.018%
1kHz ......................................................................................................................................................................... 0.02%
10kHz ....................................................................................................................................................................... 0.08%
20kHz ..................................................................................................................................................................... 0.165%

Frequency Response @ 1 Watt into 8 ohms (10Hz to 20kHz) ................................................................................  +0, -0.25dB

Power Bandwidth (-3dB).......................................................................................................................................  3Hz to 130kHz

Dynamic Headroom into 4 ohms ......................................................................................................................................  1.7 dB

Signal to Noise Ratio, “A” Weighted (125 watts into 8 ohms)...................................................................................... 

 100dB

Gain...... .................................................................................................................................................................................  29dB

Input Sensitivity

for 1 Watt ..............................................................................................................................................................  0.1 volts
for 125 Watts ..................................................................................................................................................... 1.125 volts

Input Impedance................................................................................................................................................................ 49.9K

Damping Factor (20Hz to 20kHz) ........................................................................................................................................  

 500

Rise Time (5kHz, 90V, peak-to-peak square wave, 20% to 80%) .................................................................................... . 1.9

µ

S

Power Consumption (Continuous, All Channels Driven)

Quiescent ................................................................................................................................................................  150VA
Maximum .................................................................................................................................................................  960VA
125 watts into 8 ohms ..............................................................................................................................................  580VA
200 watts into 4 ohms ..............................................................................................................................................  920VA

Power (Available in 230VAC on special order) .................................................................................................  115VAC - 50/60Hz
Chassis Dimensions ...............................................................................................  5” (127mm) x 17” (432mm) x 11.5” (292mm)
Maximum Dimensions .........................................................................................  5

3

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8

” (137mm) x 17” (432mm) x 12.5” (375mm)

Weight.. ................................................................................................................................................................... 26 lb. (11.8 kg)
Weight, Packed........................................................................................................................................................ 30 lb. (13.6kg)

Summary of Contents for GFA-5400

Page 1: ...OF CONTENTS Introduction 1 Version 1 vs Version 2 1 Test Procedures 1 Parts List 2 Specifications 6 Chassis Layout 7 Version 1 Schematic 8 Version 2 Schematic 9 10 Timber Lane Marlboro NJ 07746 USA T...

Page 2: ...an 2 THD AC power source 8 ohm resistive load except slew rate and a signal source of not more than 600 ohms An 80kHz low pass filter is employed during THD distortion measurements Signal to noise mea...

Page 3: ...F608635 SCHEMATIC ADCOM PART NUMBER DESCRIPTION LOCATION C601 C602 12003175 CAPACITOR STYROL 390pF 125V C603 C604 12001260 CAPACITOR MP 2 2uF 100V C605 C606 12005470 CAPACITOR ELECTROLYTIC 47uF 100V C...

Page 4: ...1 R627 R630 27001565 RESISTOR ROED 221 1 4W 1 R631 R634 27001565 RESISTOR ROED 221 1 4W 1 R635 R636 27004061 RESISTOR ROED 51K 1 4W 1 R637 R638 27001515 RESISTOR ROED 4 75 1 4W 1 R639 R642 27002010 R...

Page 5: ...07800 REGULATOR IC NJM7812A TT002 24005002 STANDBY TRANSFORMER Other Hardware SCHEMATIC ADCOM PART NUMBER DESCRIPTION LOCATION D901 D902 16001540 BRIDGE RECTIFIER MP154 F001 19000800 FUSE 120VAC opera...

Page 6: ...MER Note 1 Matched IRFP240 and IRFP9240 Due to manufacturing variations in the turn on voltage of these devices these parts must be replaced in matched sets of 3 If any one of the output devices fails...

Page 7: ...0 07 20kHz 0 14 THD Noise at 200 watts into 4 ohms Typical 20Hz 0 018 1kHz 0 02 10kHz 0 08 20kHz 0 165 Frequency Response 1 Watt into 8 ohms 10Hz to 20kHz 0 0 25dB Power Bandwidth 3dB 3Hz to 130kHz D...

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