Appendix A:
Input Sensitivity Level Setting Following the directions below will allow the
installer to adjust the input sensitivity of each amplifier channel pair simply and easily in just a few minutes using equipment which is commonly available in installation bays.
Necessary Equipment
•Digital AC Voltmeter
•CD with a sine-wave test tone recorded at
0 dB reference level in the frequency range to be amplified for that set of channels
(50 Hz for subwoofer channels, 1 kHz for a midrange application). Do not use attenuated test tones (-10 dB, -20 dB, etc.).
The Nine-Step Procedure
1)Disconnect the speaker(s) from the amplifier’s speaker output connectors.
2)Turn off all processing (bass/treble, loudness, EQ, etc.) on the source unit, processors (if used) and amplifier. Set fader control to center position and subwoofer level control to 3/4 of maximum (if used to feed the G-MAX).
3)Switch the “Input Voltage” switch to “Low” and turn the “Input Sens.” control all the way down.
4)Set the source unit volume to 3/4 of full volume. This will allow for reasonable gain overlap with moderate clipping at full volume.
5)Using the chart on this page, determine the target voltage for input sensitivity adjustment according to the nominal impedance of the speaker system connected to the amplifier outputs.
6)Verify that you have disconnected the speakers before proceeding. Play a track with an appropriate sine wave (within the frequency range to be amplified by the G-MAX) at 3/4 source unit volume.
7)Connect the AC voltmeter to the speaker output connectors of the amplifier. Make sure you test the voltage at the correct connectors (+ and –).
8)Increase the “Input Sens.” control until the target voltage is observed with the voltmeter.
9)Once you have adjusted the G-MAX to its maximum low-distortion output level, reconnect the speaker(s). The “Input Sens.” controls can now be adjusted downward if the amplifier requires attenuation to achieve the desired system balance.
Do not increase any “Input Sens.” setting for any amplifier channel or channel pair in the system beyond the maximum level established during this procedure. Doing so will result in audible distortion and possible speaker damage.
It will be necessary to re-adjust the “Input Sens.” for the affected channels if any equalizer boost is activated after setting the
“Input Sens.” with this procedure. This applies to any EQ boost circuit, including source unit tone controls or EQ circuits. EQ cuts will not require re-adjustment.
Nom. Impedance | Target AC Voltage |
4Ω | 49..0 V |
3Ω | 49..0 V |
2Ω | 49..0 V |
| |
Appendix B:
Precise Frequency Selection Chart
“Filter FREQ” AMP Filter
Detent Panel Actual
Number Marking Freq.
Full counter-clockwise: 42
01 . | . . . . . . . . . . . . . . . . . | 42 |
02 . | . . . . . . . . . . . . . . . . . | 42 |
03 . | . . . . . . . . . . . . . . . . . | 42 |
04 . | . . . . . . “40” | .42. . . . |
05 . | . . . . . . . . . . . . . . . . . | 43 |
06 . | . . . . . . . . . . . . . . . . . | 44 |
07 . | . . . . . . . . . . . . . . . . . | 46 |
08 . | . . . . . . .“45” | .47. . . . |
09 . | . . . . . . . . . . . . . . . . . | 49 |
10 . | . . . . . . . . . . . . . . . . . | 50 |
11 . | . . . . . . . . . . . . . . . . . | .52 |
12 . | . . . . . . . . . . . . . . . . . | 53 |
13 . | . . . . . . . . . . . . . . . . . | 55 |
14 . | . . . . . . “55” | .57. . . . |
15 . | . . . . . . . . . . . . . . . . . | 58 |
16 . | . . . . . . . . . . . . . . . . . | 60 |
17 . | . . . . . . . . . . . . . . . . . | 63 |
18 . | . . . . . . . . . . . . . . . . . | 65 |
19 . | . . . . . . “65” | .67. . . . |
20 . | . . . . . . . . . . . . . . . . . | 70 |
21 . | . . . . . . . . . . . . . . . . . | 73 |
22 . | . . . . . . . . . . . . . . . . . | 76 |
23 . | . . . . . . . . . . . . . . . . . | 79 |
24 . | . . . . . . “80” | 83 |
25 . | . . . . . . . . . . . . . . . . . | 87 |
26 . | . . . . . . . . . . . . . . . . . | 92 |
27 . | . . . . . . . . . . . . . . . . . | 96 |
28 . | . . . . . . . . . . . . . . . . . | 102 |
29 . | . . . . . . “100” | 108. . . . |
30 . | . . . . . . . . . . . . . . . . . | 114 |
31 . | . . . . . . . . . . . . . . . . . | 122 |
32 . | . . . . . . . . . . . . . . . . . | 131 |
33 . | . . . . . . . . . . . . . . . . . | 143 |
34 . | . . . . . . . . . . . . . . . . . | 157 |
35 . | . . . . . . . . . . . . . . . . . | 184 |
36 . | . . . . . . “200” | .193. . . |
37 . | . . . . . . . . . . . . . . . . . | 198 |
38 . | . . . . . . . . . . . . . . . . . | 198 |
39 . | . . . . . . . . . . . . . . . . . | 198 |
| Full-clockwise: 198 | |
Appendix C:
G-MAX Specifications
General Specifications:
Recommended Fuse Value: 80A
Recommended Fuse Type: AFS, ANL or MaxiFuse™
Input Sections:
No. of Inputs: One Stereo Pair
Input Type: Differential-balanced with RCA jack inputs
Input Range: Switchable from 200mV - 2V RMS to 800mV - 8V RMS
Amplifier Section:
Amplifier Topology: H-Bridge, Class D Mono with patented discrete drive circuitry
Power Supply: Unregulated MOSFET switching type Rated Power at 14.4 V with less than
1% THD+Noise (20-250 Hz):
600W RMS x 1 @ 4 ohms, 1200W RMS x 1 @ 2 ohms Rated Power @ 12.5V with less than
1% THD + Noise (20-250 Hz):
450W RMS x 1 @ 4 ohms, 900W RMS x 1 @ 2 ohms Signal to Noise Ratio: >95 dB referred to rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth) Frequency Response: 10 - 250 Hz (+0, -1 dB) Damping Factor: >500 @ 4 ohms/50 Hz, >250 @ 2 ohms/50 Hz
Amplifier Filter:
Amplifier Low-Pass Filter: State-variable, 12 dB/octave Butterworth or 24 dB/octave Linkwitz-Riley with continuously variable cutoff frequency selection from 40 - 200 Hz.. Defeatable..
Preamp Output:
Buffered pass-through type..
Dimensions(LxWxH):
15..75" x 9..25" x 2..50" (400mm x 235mm x 63..5mm)
