MS153 - Pregnant ALTO - Free user manual and instructions
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| Product Type | Active PA Speaker |
| Model | MS153 |
| Brand | ALTO |
| Speaker Configuration | 2-way, 15" woofer + 1" compression driver |
| Amplifier Power | 400W RMS (continuous), 800W peak |
| Frequency Response | 50 Hz – 20 kHz (-10 dB) |
| Maximum SPL | 126 dB peak |
| Impedance | 8 ohms |
| Dimensions (HxWxD) | 700 mm x 430 mm x 380 mm |
| Weight | 22 kg |
| Enclosure Material | Plywood with black carpet covering |
| Input Connectors | 1 x XLR/TRS combo, 1 x RCA |
| Output Connectors | 1 x XLR link output |
| Controls | Volume knob, master EQ (bass/treble) |
| Protection Features | Overload, thermal, and DC protection |
| Mounting | Pole socket (35 mm) for stand mounting |
| Power Supply | AC 100-240V, 50/60 Hz |
| Power Consumption | 450 W typical |
| Included Accessories | Power cord, user manual |
| Recommended Use | Live sound, DJ, public speaking, band monitoring |
Frequently Asked Questions - MS153 ALTO
How do I connect a microphone to the MS153 speaker?
Use the XLR/TRS combo input on the back panel. Plug your microphone's XLR cable into the combo jack. Adjust the volume control to a suitable level. Ensure the speaker is powered on.
What is the maximum SPL of the ALTO MS153?
The maximum SPL is 126 dB peak. This ensures high output for medium-sized venues.
Can I use the MS153 as a floor monitor?
Yes, the MS153 has a trapezoidal shape allowing it to be used as a wedge floor monitor. Place it on its side with the logo facing the performer.
How do I clean the speaker enclosure?
Use a soft dry cloth to wipe the carpet covering. Avoid water or cleaning solvents. For grille cleaning, gently vacuum with a brush attachment.
What type of power cable does the MS153 require?
The speaker uses a standard IEC power cable (included). Connect to a grounded AC outlet (100-240V, 50/60Hz).
Why is there no sound from my speaker?
Check that the speaker is powered on (power LED lit). Verify the volume knob is turned up. Ensure the audio source is connected securely and outputting signal. Try a different cable or source.
Can I pair two MS153 speakers for a stereo setup?
Yes, connect your audio source to both speakers (e.g., mixer outputs). The speakers are independent active units; they do not have built-in wireless pairing.
What is the pole mount size for stand mounting?
The MS153 has a 35 mm pole socket (standard for speaker stands). Use a speaker stand with a 35 mm pole.
Does the MS153 have a built-in equalizer?
Yes, the rear panel includes a master EQ with bass and treble controls to adjust the sound to the room.
Is the MS153 suitable for outdoor events?
The speaker is designed for indoor or covered outdoor use. Protect from rain and direct moisture to avoid damage.
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