Flash 5A V2 - Loudspeaker Proel - Free user manual and instructions

Product Type	Active PA Speaker
Model	Flash 5A V2
Brand	Proel
Dimensions (W x H x D)	Approx. 280 x 430 x 250 mm
Weight	Approx. 8.5 kg
Power Supply	AC 100-240V, 50/60Hz
Amplifier Power	200W RMS
Frequency Response	60 Hz - 20 kHz
Speaker Configuration	5" Woofer + 1" Tweeter
Inputs	XLR/Jack Combo, RCA
Outputs	XLR Link Out
Controls	Volume, EQ, Power Switch
Enclosure Material	Polypropylene
Mounting	Pole mount socket (36mm)
Protection Features	Overload, Thermal, Limiter
Cleaning Instructions	Wipe with dry cloth; avoid liquids
Safety	Do not expose to rain or moisture
Spare Parts & Repair	Contact authorized Proel service center
General Information	Designed for portable PA applications

Frequently Asked Questions - Flash 5A V2 Proel

How do I connect a microphone to the Flash 5A V2?

Use the XLR/Jack combo input on the rear panel. Set the input gain appropriately. For dynamic microphones, ensure phantom power is turned off.

Can I use the Flash 5A V2 as a floor monitor?

Yes, the speaker has a trapezoidal shape and can be placed on its side as a wedge monitor. Use the rubber feet on the side to prevent slipping.

What is the maximum power output?

The internal amplifier delivers 200W RMS, with peak power handling up to 400W. This is sufficient for small to medium venues.

Does it have Bluetooth connectivity?

No, the Flash 5A V2 does not feature Bluetooth. It only has wired inputs (combo and RCA). Use an external Bluetooth receiver if needed.

How do I mount the speaker on a stand?

Insert the stand's pole into the 36mm socket on the bottom of the speaker. Ensure the stand is stable and the speaker is securely placed.

What cable do I need to connect a mixer?

Use a balanced XLR or 1/4" TRS cable from the mixer output to the combo input on the speaker. For unbalanced sources, use a TS cable or RCA.

Is phantom power available?

No, the Flash 5A V2 does not provide phantom power. Use an external phantom power supply if required for condenser microphones.

How do I clean the speaker grille?

Gently vacuum the grille with a soft brush attachment to remove dust. Do not use water or cleaning agents. Wipe the cabinet with a dry cloth.

Can I daisy-chain multiple speakers?

Yes, use the XLR link out on the first speaker to connect to the input of the next speaker. This allows multiple speakers to receive the same signal.

What should I do if the speaker overheats?

The speaker has thermal protection and will shut off if overheated. Turn off the unit, let it cool down in a ventilated area, and reduce the volume before restarting.

USER MANUAL Flash 5A V2 Proel

R&D Department Testing Procedure

From PROEL R&D DEPT.

To PROEL SERVICE DEPT.

Object FLASH5A amplifier module - TESTING PROCEDURE

Date 30/04/2014

Instruments required:

1) Sinusoidal audio signal generator
2) 100MHz or more dual trace oscilloscope (scope)
3) True RMS digital multimeter (DMM) with dBu scale
4) 250W or more Variac transformer with 0-250 Vac range (230V european version) or with 0-140 Vac range (120V US version)
5) 4 Ω 100W or more resistive load
6) 8 Ω 50W or more resistive load
7) Music and pink noise signal generator (CD player)

IMPORTANT: The oscilloscope must be insulated from the earth ground.

1. Set up

• Check the correct earth main connection on the rear surface of the front panel.
• Check the insulation between the heat sink and the case of IC4, IC5 and IC3.
• Set the LINE LEVEL control full clockwise.
• Set the NEARFIELD/MIDFIELD button in NEARFIELD position.
• Switch OFF the amplifier module.

2. Low amplifier check

• Connect the mains of amplifier module to VARIAC and set it at zero AC voltage.
• Connect the scope CH1 GND clip to P8 black wire/faston (GND), scope CH1 probe tip to P6 red wire/faston (LOW OUT) and scope CH2 probe tip to P10 black wire/faston (HIGH OUT).
• Switch ON the amplifier module.
• Increase slowly the VARIAC voltage up to the nominal value (230Vac or 120Vac).
• Check the transformer secondary voltages with DMM (without signal on input):

52 ±2 Vac between red wire

32 ±2 Vac between yellow wire

- Using DMM check also the +15Vdc / -15Vdc supplies on relative voltage regulator outputs (IC4 & IC5 devices).

- Connect the signal generator to LINE INPUT (XLR/JACK socket) and set it at 100 Hz, -10 dBu.

- Verify that CH1 (LOW OUT) signal is 30V ±6 Vpp.

- Check of SIGNAL/LIMIT LED function, moving the volume potentiometer of the amplifier; when the output signal is < 2 Vpp the led must be OFF when the output signal is > 2 Vpp, the led must be GREEN.

• Rotate the volume potentiometer knob fully clockwise.
• Set the signal generator at 0 dBu.

• Connect the 4 Ω load resistor at LOW OUT and verify that the signal is symmetrical refer to GND, without detectable distortion and oscillation.

• Remove signal from XLR Input.

• Connect the signal generator to LINE INPUT (RCA socket) and set it at -20 dBu.
• Verify that low amplifier output signal is 28V ±6 Vpp.

NOTE: the low amplifier is designed with a class-D half-bridge self-oscillating amplifier around the IRS2092 ic, to see in detail how this amplifier works consult IRS2092 data sheet and related application notes available on International Rectifier website (www.irf.com). The low amplifier oscillating frequency is in the range of 400-420 KHz. If there is a problem in the nested loop the amplifier doesn't oscillate: switch off then check TR6. If the mosfets isn't fault check the voltage, using the DMM, between -VCC and pin 3 of IC2 (7812), this is the voltage regulator of low side mosfet driver, if this regulator doesn't work the amplifier doesn't oscillate.

3. COMPRESSOR check of LOW amplifier

• Increase the signal at +10 dBu and check that the output signal remains constant at 40 ±4 Vpp. Check that the SIGNAL/COMP LED has changed the colour from GREEN to RED.
• Disconnect the 4ohm □load resistor from the LOW amplifier output.

6. HIGH amplifier check

• Connect the signal generator to LINE INPUT (XLR/JACK socket) and set it at 10 KHz, 0 dBu.
• Verify that the CH2 (HIGH OUT) signal is symmetrical referring to GND, without detectable distortion and oscillation.
• Connect the 8 Ω load resistor at LOW OUT and check that the HIGH amplifier output signal is limited to 20 ±3 Vpp.

7. X-OVER check.

• Disconnect all resistive loads and set the signal generator to -10 dBu.
• Sweep the frequency and check that the LOW amplifier power out signal level is as the 1a plot and HIGH frequency amplifier power signal level is as 1b plot.

• Set the NEARFIELD/MIDFIELD button in MIDFIELD position.
• Sweep again the frequency and check that the LOW amplifier power out signal level is as the 2a plot and HIGH frequency amplifier power signal level is as 2b plot.

8: Burn in

• Connect to the LINE input of the amplifier module the 3:1 pink noise source.
• Connect a 4 Ω 100W resistive load to the LOW amplifier output.
• Connect a 8 Ω 50W resistive load to the HIGH amplifier output.
• Switch ON the amplifier module.
• Increase the pink noise level until the SIGNAL/LIMIT LED is flickering in RED/GREEN light.
• Hold the amplifier in vertical position and run the burn-in test for 2 hours min.

9: Final acoustic check

- After the burn-in test, the amplifier module must still work properly. An acoustic or electric test (with speaker box and audio signal) is needed to verify this condition.