Ahuja DPA 570m Mixer Amplifiers 50 Watts With Built-In Digital Player

Ahuja DPA 570M Mixer Amplifier 50W with Built-in Digital Player

The Ahuja DPA-570M is a 50 watt PA mixer amplifier with a built-in digital player, designed for small public address and background music installations. It combines three microphone inputs and one auxiliary input with an MP3 player that reads USB drives, SD and MMC cards and also offers Bluetooth, so a single compact unit handles announcements and music playback for shops, clinics, classrooms, cafes, small offices and compact places of worship without a separate source device or mixer.

Key features

• 50 W RMS power output at 10 percent THD, 75 W maximum
• 3 microphone inputs and 1 auxiliary input
• Built-in MP3 player with USB, SD and MMC card reader and Bluetooth
• Remote control supplied for the digital player
• Line output for connecting a booster amplifier
• Cut and boost bass and treble controls
• Speaker outputs for 4, 8 and 16 ohm speakers and a 100V line
• Instant transfer to DC power from a car battery if AC power fails

Amplifier output and speaker matching

The amplifier delivers 50 W RMS at 10 percent THD and 45 W RMS at 5 percent THD, with a maximum output of 75 W. Output regulation is held within 2 dB from no load to full load at 1 kHz, which keeps volume consistent as speakers are added. Speaker outputs are provided at 4, 8 and 16 ohms for direct connection of low-impedance speakers, plus a 100V line output for distributed speaker systems where several ceiling or wall speakers are run over longer cable distances from one amplifier. That combination covers a single room with a pair of speakers as easily as a small floor plate with a line of distributed speakers.

Inputs for speech and music

Three microphone inputs, each rated at 0.6 mV into 4.7 kilohms, handle the microphones used for announcements, teaching or prayer, while the auxiliary input at 100 mV into 330 kilohms accepts a phone, laptop, television or external player. Each source has its own level control, and the master bass and treble controls give plus or minus 10 dB of adjustment at 100 Hz and 10 kHz, so speech can be kept clear and music can be softened for background listening. The frequency response of 50 to 15,000 Hz within plus or minus 3 dB is matched to speech and general music duty, and a line output allows the mixed signal to feed a booster amplifier when the system later grows.

Built-in digital player

The integrated digital player removes the need for a separate music source in simple installations. It plays MP3 files from USB storage and from SD and MMC cards, connects to phones and tablets over Bluetooth, and is operated with the supplied remote control. A shop can run background music all day from a card left permanently in the slot, a clinic can play repeated announcements from a USB drive, and staff can take over with a phone over Bluetooth when needed. Having the player inside the amplifier also means fewer cables, fewer boxes and one power switch for the whole system.

Power backup and installation

The DPA-570M runs on 220-240V AC at 50/60 Hz and transfers instantly to DC power from a 12-14V car battery if the AC supply fails, so announcements and music continue through a power cut. Power consumption is 90 VA on AC and 3.1 A on DC. The unit measures 305 mm wide, 120 mm high and 305 mm deep and weighs 6.20 kg, a shelf-friendly size for counters and small equipment cupboards. For small premises that need one dependable amplifier for microphones, music and announcements, with battery backup built in, the DPA-570M is a complete and economical foundation.