Page 25
Reference Manual
Macro-Tech
®
24x6 & 36x12 Power Amplifiers
6 Specifications
The following specifications apply to 120 VAC, 60 Hz units in
stereo mode with 8 ohm loads and an input sensitivity of 26
dB unless otherwise specified.
120 VAC, 60 Hz Units:
These units have a dedicated trans-
former for 120 VAC, 60 Hz power mains.
International Units:
These units have dedicated transform-
ers for various AC mains voltages and line frequencies.
Performance
Frequency Response:
±0.1 dB from 20 Hz to 20 kHz at 1
watt (see Figure 6.1).
Phase Response:
±10° from 10 Hz to 20 kHz at 1 watt
(see Figure 6.4).
Signal-to-Noise Ratio:
(A-weighted) Greater than 105 dB
below rated continuous average output from 20 Hz to 20
kHz. (No weighting) 100 dB below rated continuous aver-
age output from 20 Hz to 20 kHz.
Harmonic Distortion (THD):
Less than 0.05% at rated
output from 20 Hz to 1 kHz, increasing linearly to less than
0.1% at 20 kHz.
IM Distortion (IMD):
Less than 0.05% from 10 milliwatts
to full rated output.
Damping Factor:
Greater than 1,000 from 10 Hz to 400
Hz (see Figure 6.2).
Slew Rate:
Channel 1, greater than 30 volts per micro-
second; Channel 2, greater than 13 volts per microsec-
ond.
Voltage Gain:
20:1 ±3% or 26 dB ±0.25 at +26 dB input
sensitivity and the maximum level setting. The sensitivity
varies by model and channel when the input sensitivity is
set to 0.775 V as listed below:
Macro-Tech 24x6 Channel 1 (2400): 83:1 ±12% or 38 dB
±0.5 dB.
Macro-Tech 24x6 Channel 2 (600): 54:1 ±12% or 35 dB
±0.5 dB.
Macro-Tech 36x12 Channel 1 (3600): 124.6:1 ±12% or
41.9 dB ±1.0 dB.
Macro-Tech 36x12 Channel 2 (1200): 64:1 ±12% or 36 dB
±0.5 dB.
Power
Output Power:
The following are guaranteed minimums
for standard 1 kHz power at 1 kHz and 0.1% or less THD.
120 VAC, 60 Hz Models
Macro-Tech 24x6
Channel 1 (2400):
1050 watts into 2 ohms.
800 watts into 4 ohms.
520 watts into 8 ohms.
Channel 2 (600):
400 watts into 2 ohms.
325 watts into 4 ohms.
225 watts into 8 ohms.
Macro-Tech 36x12
Channel 1 (3600):
1800 watts into 2 ohms.
1565 watts into 4 ohms.
1120 watts into 8 ohms.
Channel 2 (1200):
675 watts into 2 ohms.
480 watts into 4 ohms.
310 watts into 8 ohms.
International Models
Macro-Tech 24x6
Channel 1 (2400):
875 watts into 2 ohms.
745 watts into 4 ohms.
510 watts into 8 ohms.
Channel 2 (600):
375 watts into 2 ohms.
335 watts into 4 ohms.
230 watts into 8 ohms.
Macro-Tech 36x12
Channel 1 (3600):
1460 watts into 2 ohms.
1300 watts into 4 ohms.
965 watts into 8 ohms.
Channel 2 (1200):
515 watts into 2 ohms.
420 watts into 4 ohms.
285 watts into 8 ohms.
It is extremely important to have adequate AC power
available. Power amplifiers cannot create energy—they
must have the required voltage and current to deliver the
undistorted rated wattages you expect.
Load Impedance:
Rated for 16, 8, 4, and 2 ohm use only.
Safe with all types of loads, even reactive ones.
Required AC Mains:
All units require 90 watts or less at
idle. See Section 7 for detailed information on AC power
draw, current draw and thermal dissipation.
In-Rush Current*:
73.20 amperes.
* Per EN 55103-1: 1996 Annex B and Annex F. Highest reading from a
sample of 10 random readings. Reading measured using MA-3600VZ
amplifier. Results for these amps deemed MA-3000VZ results.
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