Admar AD221A Amplifier Instructions
- June 9, 2024
- Admar
Table of Contents
Admar AD221A Amplifier Instructions
Plug and connection assignment:
Introduction
This chapter will help you select the right cables and plugs to connect your valuable equipment in such a way that a perfect sound experience is ensured.
Please note these advices, because especially in ‘Sound & Light’caution is indicated: Even if a plug fits into the socket, an incorrect connection may result in a destroyed power amp, a short circuit or ‘just’ in poor transmission quality!
Balanced and unbalanced transmission
Unbalanced transmission is mainly used in semi-professional environment and in
hifi use. Instrument cables with two conductors (one core plus shielding) are
typical representatives of the unbalanced transmission. One conductor is
ground and shielding while the signal is transmitted through the core.
Unbalanced transmission is susceptible to electromagnetic interference,
especially at low levels, such as microphone signals and when using long
cables. In a professional environment, therefore, the balanced transmission
ispreferred, because this enables an undisturbed transmission of signals over
long distances. In addition to the conductors ‘Ground’ and ‘Signal’, in a
balanced transmission a second core is added. This also transfers the signal,
but phase-shifted by 180° Since the interference affects both cores equally,
by subtracting the phase-shifted signals, the interfering signal is completely
neutralized. The result is a pure signal without any noise inter‐ference .
XLR plug (balanced)
- Ground, shielding
- Signal (in phase, +)
- Signal (out of phase, –)
- Shielding on plug housing (option)
Caution
-
Possible hearing damage
The device can produce volume levels that may cause temporary or permanent hearing impairment. Over an extended period of time, even levels that seem to be uncritical can cause hearing damage. -
Power supply
Before connecting the device, ensure that the input voltage (AC outlet) matches the voltage rating of the device and that the AC outlet is protected by a residual current circuit breaker. Failure to do so could result in damage to the device and possibly injure the user. Unplug the device before electrical storms occur and when it is unused for long periods of time to reduce the risk of electric shock or fire. -
Risk of fire
Do not block areas of ventilation. Do not install the device near any direct heat source. Keep the device away from naked frames. -
Operating conditions
Only operate the device within the ambient conditions specified in the chapter Technical specifications of this user manual. Avoid heavy temperature fluctuations and do not switch the device on immediately after it was exposed to temperature fluctuations
Technical specications:
AD221A Technical Specications:
Type： Active double 21 inch subwoofer
SPL：148dB PEAK
Frequency range：[+/-3 dB] 25 Hz – 120 Hz
Power: 2 x21” 8000W PEAK
Input sensitivity Nominal 0 dBu
Signal input： 1 x XLR (Audio Input)
Signal output： 1x XLR (Audio Link Out)
DSP interface： 1 x DSP setup rotary switch (10 presets)
AD221A Amplier Technical Specications
Distoration： <0.05%
Amplifier type： Class-D
Output power： 3800W+3800W/4Ω
Operating voltage: 110V-240V 50/60Hz
Power connector: Powercon® Input
Dimensions(mm)：
Amplier instructions：
- Control interface：connect PC via RJ45 interface，adjust sound through software
- Input XLR： XLR input signal connectors
- Output XLR：XLR output signal connectors
- LED indicator for power:This LED lights green when the unit is turned on and the power supply voltage is present.
- LED Indicator for signal： This LED lights green when an input signal is present
- LED Indicator for signal： Yellow for clipping
- LED Indicator for signal： Red for overloading
- AC Power connector input and output：110V-240V 50Hz-60Hz
- Power Switch
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