ELITE ACOUSTICS A2-5 and A25U Acoustic Amplifier Instruction Manual

A2-5 and A25U Acoustic Amplifier

Elite Acoustics Engineering A2-5 and A25U Acoustic Amplifier

The Elite Acoustics Engineering A2-5 and A25U Acoustic Amplifier is a versatile and portable amplifier that provides superb functionality with its 4 channels, mixer, effects, and battery-powered features. The A2’s lightweight design and fully-featured mix, digital effects, and monitor sections seamlessly combine to elevate your performance. It offers extensive input EQ and an adjustable notch filter to tame feedback or add that final degree of clarity when needed.

The amplifier comes with an all-wood cabinet combined with a 5-1/4 high- sensitivity woofer and 1 silk-dome tweeter that deliver full frequency clarity with impressive bass response. The Bluetooth word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Elite Acoustics Engineering, Inc is under license.

Note that due to continuous development and improvements of the product, features and specifications are subject to change without notice. All weights and measures are approximate.

What is in the Box?

Your A2-5 or A25U package contains the following:

• Speaker
• 12V AC Power Supply Adapter

Product Usage Instructions

Follow the below steps for quick start:

1. Check that the Battery Switch [49] is set to the Connect position. (Battery Switch is a built-in circuit breaker to preserve battery life.)
2. Make sure the SPEAKER VOLUME [3] control is turned all the way down.
3. Connect microphones and/or instruments. You can use Channel 1 or Channel 2, or both. If using Channel 1, be sure the Instr-Mic/Line push-switch [22] is not pushed in when using a mic or line level signal. Microphones are connected to the XLR MIC IN [29], for 1/4 Line Levels signals use [28], and use [27] for unbuffered instrument applications (note this is a high gain setting and should not be used for active outputs such as battery-powered guitar preamps).
4. Turn on the POWER switch [50].
5. Adjust the SPEAKER VOLUME [3] to a comfortable level.

Top Panel Controls

The top panel controls are as follows:

• LED’s: [1] Power: Blue indicates unit is ON [2] +48V LED: Orange indicates Phantom Power is on
• Monitor Output Controls [3] Speaker Volume: Control speakers’ volume level [4] Mono: Changes speaker output from Left Only to Mono [5] Equalizer: Adjust High, Mid, and Low Frequency response [6] Peak LED: RED indicate Signal Clip [7] Signal LED: GREEN indicate Signal Present [8] Aux Input/Level: Connect audio source with 1/8 jack from MP3/CD player, etc.
• Effects Controls [9] Effects Mix: Amount of effect being added to output [10] Rate/Decay: Controls the duration of the effect [11] Effects Knob Selector: Select effect of choice [12] EFX Bypass: Turn effects on or off (When LED is on, the effects are turned off)
• [13] Bluetooth: Activate Bluetooth function

Rear Panel Controls

The rear panel controls are as follows:

• Channel 2 [30] Gain: Apply gain for level control [31] Mute: Mute Channel [32] EFX/AUX Send Level: Adjust the level to send out [33] EFX/AUX select: select internal EFX or external AUX bus [34] PAD: fixed attenuation for hot signals [35] Line: 1/4 TS input [36] Mic In: XLR for Microphone Input

Superb functionality and cordless portability provides unparalleled versatility. A2’s light weight yet fully featured Mix, Digital Effects, and Monitor sections seamlessly combine to elevate your performance. A2 offers extensive input EQ and an adjustable Notch Filter to tame Feedback or add that final degree of clarity when needed. An all-wood cabinet combined with a 5-1/4” high-sensitivity woofer and 1” silk-dome tweeter deliver full frequency clarity with impressive bass response.

The Bluetooth word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Elite Acoustics Engineering, Inc is under license
NOTE: Due to continuous development and improvements of our products, features and specifications are subject to change without notice. All weights and measures are approximate. Oct, 2021.

WHAT IS IN THE BOX
Your A2-5 or A25U package contains the following:(1) Speaker (1) 12V AC Power Supply Adapter

Refer to Page 2 and 4, for the following Controls
QUICK START

1. Check that the Battery Switch [49] is set to the “Connect” position. (Battery Switch is a built in circuit breaker to preserve battery life.)

2. Make sure the SPEAKER VOLUME [3] control is turned all the way down.

3. Connect microphones and/or instruments. You can use Channel 1 or Channel 2, or both. If using Channel 1, be sure the Instr-Mic/Line push-switch [22] is not pushed
   in when using a mic or line level signal. Microphones are connected to the XLR MIC IN [29], for 1/4” Line Levels signals use [28], and use [27] for unbuffered instrument applications (note this is a high gain setting and should not be used for active outputs such as battery powered guitar preamps).

4. Turn on the POWER switch [50]

5. If desired, connect a Bluetooth® [13] device; see Bluetooth® Function on page 3.

6. Turn on your source signal(s) and adjust level for normal operation. Turn up GAIN [14] until there is a solid green LED showing “signal” at the desired playing level. The red
   “peak” LED, indicating too much signal, should only light for very brief periods, less than one second, or not at all. Note if you are using an iPhone or iPad via Bluetooth®, set the volume on your device about halfway. Maximum volume will distort.

7. Adjust the SPEAKER VOLUME [3] to a comfortable level.

TOP PANEL CONTROLS LED’s:

• [1] Power: Blue indicates unit is ON
• [2] +48V LED: Orange indicates Phantom Power is on

Monitor Output Controls

• [3] Speaker Volume: Control speakers’ volume level
• [4] Mono: Changes speaker output from Left Only to Mono
• [5] Equalizer: Adjust High, Mid, and Low Frequency response
• [6] Peak LED: RED indicate Signal Clip
• [7] Signal LED: GREEN indicate Signal Present
• [8] Aux Input/Level: Connect audio source with 1/8” jack from MP3/CD player, etc.

Effects Controls

• [9] Effects Mix: Amount of effect being added to output
• [10] Rate/Decay: Controls the duration of the effect
• [11] Effects Knob Selector: Select effect of choice
• [12] EFX Bypass: Turn effects on or off (When LED is on, the effects are turned off)
• [13] Bluetooth: Activate Bluetooth function

TOP PANEL

BLUETOOTH® FUNCTION

1. Turn Bluetooth® function ON/OFF;
   Press the MODE button and hold for approximately 5 seconds Both LEDs will flash at the same time

2. Pair device to the speaker system
   While both LED’s are flashing, quickly tap the MODE button once Both Flashing LED: indicate Bluetooth® is ready to be paired Flashing Blue LED only: indicate Bluetooth® is connected

REAR PANEL CONTROLS
Channel 1

• [14] Gain: Apply gain for level control
• [15] Mute: Mute Channel
• [16] EFX/AUX Send Level: Adjust the level to “send” out
• [17] EFX/AUX select: select whether you are sending to internal EFX or external AUX bus
• [18] PAD: fixed attenuation for “hot” signals
• [19] Notch Filter: set amount of cut or boost for Notch Filter
• [20] Frequency: set the frequency of the Notch Filter
• [21] Phase: Reverse the phase of input waveform
• [22] Instr-Mic/Line: Select input source; Instrument or Mic/ Line input
• [23] High: set amount of High Frequency cut or boost
• [24] Mid: set amount of Mid Frequency cut or boost
• [25] Mid Frequency: set the frequency of the Mid cut or boost
• [26] Low: set amount of Low Frequency cut or boost
• [27] Instrument: 1/4” TS input
• [28] Line: 1/4” TS input
• [29] Mic: XLR for Microphone Input

Channel 2

• [30] Gain: Apply gain for level control
• [31] Mute: Mute Channel
• [32] EFX/AUX Send Level: Adjust the level to “send” out
• [33] EFX/AUX select: select internal EFX or external AUX bus
• [34] PAD: fixed attenuation for “hot” signals
• [35] Line: 1/4” TS input
• [36] Mic In: XLR for Microphone Input

Channel 3/4

• [37] Level: Set the gain for both channels 3 & 4

• [38] EFX Send Level: Adjust the level to “send” out

• [39] Left (Mono): 1/4” mono TR input

• [40] Right: 1/4” mono TR input

• [41] Monitor Right Output: Connect to another speaker using 1/4” TS

• [42] Foot Switch: TR footswitch to control Effects Bypass remotely

• [43] AUX Send: 1/4” TR output

• [44] AUX Return: 1/4” TR input

• [45] Main Outputs / Chan 1/2 Direct Output: Select source of XLRs as Main mix or Direct Outputs for Chan 1 & 2

• [46] Output Level: Set output level for XLRs

• [47] Left: XLR Left Output

• [48] Right: XLR Right Output

• [49] Battery Switch: Built in Circuit Breaker to preserve battery life.
  Connect: Enable battery power when using unit
  Disconnect: Disable battery power when storing unit to preserve battery life

• [50] Power Switch: Turn you speaker on or off

• [51] USB Charging Dock: Conveniently recharge your portable devices

REAR PANEL

DIGITAL EFX

16 DIGITAL EFX PROGRAMS

• There are 16 total Digital EFX programs
  • R1 to R10 – REVERB
  • E1 and E2 – ECHO
  • ER1 and ER2 – Echo and Reverb
  • CHO – Chorus
  • FLange – Flanger
  • Program select Encoder (11) is for pro-gram change.
  • Parameter knob (10) to change rate or delay time for the program that is set.
  • Mix knob (9) is to fine turn the amount of EFX you want in output mix.
  • EFX can be bypassed by Pressing the bypass switch (12)
  • EFX send levels for each channel is set by on the rear panel ( 16 and 32, 38) that correspond to each channel.

TIPS

• Distorted Sound
  1.  Check input level to make sure input Signal Light is in GREEN and not CLIP-PING RED. Reduce Input by turn down GAIN knob (14, 30, 37). Make sure all EQ knobs are set to Middle. (FLAT)
  2. Check Monitor Signal Light is also GREEN and not Clipping. Reduce Speaker Level by turning Monitor Knob (3), make sure EQ is set to middle (FLAT)
• No Sound
  1. Check LED signal lights. Green means there is Signal on the input.
  2. Make sure MIX knob is at 12 o’clock position.
  3. Make sure Channel is un-muted.
  4. Make sure +48V is on when using a Condenser Mic. Make sure to MUTE when turning on +48V to prevent loud POP sound.
• Battery not Holding Charging
  1. Power unit off and charge the unit for 6 hours with Battery switch in Connected position. If problem still persist, contact [email protected] for battery replacement instructions.

CONNECTING TO ANOTHER SPEAKER

The Monitor Right Output allows you to add a second active monitor while preserving the stereo image. The Monitor unit will play the Left Channel content and the extension monitor will play the Right Channel. If stereo imaging is not desired, simply engage the Mono button on the A2’s top panel. Note that the Monitor Right Output will not drive a passive speaker; it is a Line-level output that can drive amplifiers or active monitor systems.

ABOUT EQ AND PHASE SETTINGS

• High – used to add sibilance and crispness to your sound, with the knob at 12:00, there is no boost or cut to the high frequency content.
• Mid – Helps control the clarity of your overall mix and should be adjusted to suit lower or higher volume performance levels. Boosting the mids helps speech clarity and intelligibility at lower volumes while cutting the mids produces a more natural sound at higher volumes. The Mid frequency selection knob allows for a range extending from high LF to low HF. When set to 12:00 the Mid frequency peak is around 1.2k Hz, with +/- 12dB of boost or cut depending on the setting of the Mid knob. Here again, with Mid set to 12:00 the mid control is effectively out of the circuit.
• Low – In general, lower volumes can benefit from LF boost to help bring out the bass at these lower settings, but it is usually left flat or even slightly cut for high playback levels.
• Notch – When it comes to the mechanics, Notch filtering is very much like the adjustable mid frequency described above. However, the frequency range is much lower, and the filter itself is much tighter, hence the term “notch.” When used in “cut” mode, this is very effective in managing feedback, which is explained in some detail in our Feedback section. However, the notch can be set to cut or boost to allow for the full range of possibilities. Many times feedback is not an issue, and the artist can take advantage of a particular notch setting to effectively tweak a final mix to accommodate specific room or instrumentation considerations.
• Phase – Use the phase setting that best supports your overall sound and system integration considerations. For example, Phase can be set to facilitate the best bass response at low volumes, and it can also be effective as a feedback deterrent, which will be reviewed in our Feedback section.

HOW TO DEAL WITH ACOUSTIC FEEDBACK

Simply put, the annoying shrilling howl of growing and untamed feedback is the result of “in-phase” frequencies getting together and being reinforced by the sound system and environment.

Phase Switch – since the purpose of the Phase Switch is to reverse the polarity, the first line of defense is to change the phase, which can sometimes be a cure all by itself. This has the effect of changing the phase relationship between the amplified signal and live sound, which can break up some “in-phase” reinforcing components. On the other hand, it’s preferred if we can leave the phase set to provide the most natural and balanced sound.

Notch Filter – Another way to prevent “in-phase” reinforcement is to simply find and “notch” out the offending frequency. The approach is straight forward; with the Notch set to full “cut” (counter clockwise), slowly rotate the Notch Frequency to align with and cancel the offensive tone.

Phase and Notch – probably the most widely used approach is to start without the notch filter engaged, and to bring up the gain and or volume to encourage feedback. Changing the Phase will change the frequency of the feedback. Leave the Phase set to whichever setting produces the higher pitched note.
Next, use the aforementioned Notch technique to hone in on and prevent the feedback. Keep in mind, fighting feedback in this manner may or may not appeal to your taste in overall tone. It’s certainly fair to experiment and try it the other way around, i.e., Phase switch to stop HF tone and Notch to cutout the LF tone. After all, Live Sound is an Art and when it’s all said and done tone is King.

ORIGINAL A2-5 SLA BATTERY & RECHARGING INFORMATION

1. To fully charge a unit –
   • Set Battery Switch to “CONNECT”
   • Turn Power Switch OFF
   • Connect “AC” adaptor to Power Jack.
   • Blue “Charge” LED should be lit, Charge time can vary from 24 – 36 hours depending on model.
2. When unit is powered with “AC” adaptor, Battery Switch should be in “CONNECT” position.
3. Battery Switch should be on “DISCONNECT” when unit is packed for transit or unit is in storage. Make sure battery is fully charged before UNIT is put into storage. We recommend fully charging the battery at least once each month.
4. SLA battery lifetime is typically 1 – 2 years depending on usage.

SLA BATTERY – FOR MAXIMUM BATTERY LIFE

• Recharge after every use
• Use & recharge battery at least once a month
• DO NOT leave power switch in the “ON” position when it is not in use. Doing so after a long period of time will damage the battery
• Keep unit in a cool, dry place away from extreme temperatures
• Do not service, modify, or replace the battery
• If the battery fails to charge, contact Elite Acoustics Designs

A25U – BATTERY & RECHARGING INFORMATION

1. To fully charge a unit –
   • Set Battery Switch to “CONNECT”
   • Turn Power Switch OFF
   • Connect “AC” adaptor to Power Jack.
   • Blue “Charge” LED should be lit, Charge time can vary from 5 to 6 hours
   • Once it is fully charged LED “Blue Color” will turn off.
2. When unit is powered with “AC” adaptor, Battery Switch should be in “DISCONNECT” position if Battery is already fully charged.
3. Battery Switch should be on “DISCONNECT” when unit is packed for transit or unit is in storage. Make sure battery is fully charged before UNIT is put into storage. We recommend fully drain and then fully charging the battery at least once each month.

• New Production – A25U Battery Meter -•
  3 – Charged. This LED will turn on when battery is fully charge and will turn off once the unit is powered ON after a full charge. This LED is not part of the battery level meter.

• 2 – normal

• 1 – normal

• LOW – less then 10%

• CHARGE – charging LED will turn off when battery is fully charged.

FOR MAXIMUM BATTERY LIFE

• Battery Type: LifePO4 – Lithium Iron Phosphate.
• Charge Battery when is LOW or Depleted.
• Use & recharge battery at least once a month
• DO NOT leave power switch in the “ON” position when it is not in use. Doing so after a long period of time will damage the battery
• If unit is always plugged in, it is recommend ate to put Battery Switch in Disconnected position, but make sure to recharge unit monthly.
• Keep unit in a cool, dry place away from extreme temperatures
• Do not service, modify, or replace the battery
• If the battery fails to charge, contact Elite Acoustics Engineering

SYSTEM SPECIFICATIONS

Speakers:

• Woofer = 5 1/4”
• Tweeter = 1” Silk-Dome
• Optimized front ports for extended low-frequency response Frequency response 70Hz – 20k Hz 103 dB SPL

Amplifier:

• Ultra High-Efficiency Class D 30W Bi-AMP

EQ Controls:

• Low +/- 12dB @ 50Hz (shelving)
• Mid +/- 12dB @ 200Hz – 4k Hz (resonant)
• High +/- 12dB @ 10k Hz (shelving)
• Notch +/- 12dB @ 80Hz – 400 Hz (high-Q resonant)

Battery:

• Orginal M2-6 units – Built-in SLA type, rechargeable [12V, 9Ah/20hr] SLA Typical recharge time ~ 20 hours
  Play time ~ 5 to 6 hours
  New Production – M26U* – units with Lithium Iron Phospate (LifePO4) battery.
  Battery Type: LifePO4 Lithium Iron Phosphate (5500mAh)
  Typical Charge Time – 5.5 hours

• Power Supply:
  DC 12V, 3000 mA

• Physical:
  Dimensions: 9.0”L x 9.0”W x 14.5”H Weight: 24 lbs

Legal Notice: CALIFORNIA PROPOSITION 65 WARNING
WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov.

THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS.

1. THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND
2. THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.

WARRANTY (USA ONLY)

Elite Acoustics Engineering Inc. warrants this product to be free of defects in material and workmanship (excluding battery) for a period of 1 year from the date of original retail purchase. Elite Acoustics Engineering Inc. warrants the Speaker’s Battery for 90 days from the date of original retail purchase. This warranty is enforceable only by the original retail purchaser. To be protected by this warranty, the purchaser must complete and return the enclosed warranty card within 14 days of purchase. During the warranty period EAE shall, as its sole and absolute option, either repair or replace, free of charge, any product that proves to be defective on inspection by EAE or its authorized service representative. To obtain warranty service, contact Elite Acoustics Engineering Technical Support via email: [email protected]. PRE-AUTHORIZATION MUST BE OBTAINED BEFORE SENDING ANY PRODUCT TO AN ELITE ACOUSTIC ENGINEERING SERVICE CENTER. All inquires must be accompanied by a description of the problem. All authorized returns must be sent to the EAE repair facility postage prepaid, insured and properly packaged. EAE reserves the right to update any unit returned for repair. EAE reserves the right to change or improve the design of the product at any time without prior notice. This warranty does not cover claims for damage due to abuse, neglect, alteration, or attempted repair by unauthorized personnel and is limited to failures arising during normal use that are due to defects in material or workmanship in the product. Any implied warranties, including implied warranties of merchantability and fitness for a particular purpose, are limited in duration to the length of this limited warranty. Some states do not allow limitations on how long an implied warranty lasts, therefore above limitation may not apply to you. In no event will EAE be liable for incidental, consequential, or other damages resulting from the breach of any express or implied warranty, including among other things, damage to property, damage based on inconvenience or on loss of use of the product, and, to the extent permitted by law, damages for personal injury. Some states do not allow the exclusion of limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights, and you may also have other rights, which vary from state to state. This warranty only applies to products sold and used in the United States of America. For warranty information in all other countries please refer to your local distributor. ©Elite Acoustics Engineering Inc.

Outside of the USA – Contact the Distributor in your area for service and warranty info.

References

• Acoustic amplifier - Pedalboard Mixer - Pedal Power Supply - Acoustic Amplifier - Digital Mixer - Elite Acoustics - EAE
• P65Warnings.ca.gov

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