MDi Series is a solution from RAM Audio for fixed installations, where state-of-the-art amplification technology is used to manage acoustic systems in the most efficient and greenest way possible, without diminishing quality of sound and dynamics that have always typified RAM Audio amplifiers.

A new generation of QuantaPulseTM switching mode power supplies with Power Factor Correction (PFC) to improve efficiency, with a schematic thought to give a very high capacity of instantaneous power, together with very evolved high efficiency audio modules in class D with an excellent quality of sound, are the basis on which RAM Audio developed this series that is capable of offering the most optimal solution to the very exigent fixed-installations market.

• Hi audio quality in an extremely efficient class D design

• Last generation PFC QuantaPulse™ switch mode PS

• 2/4/8/16 channels models from 1400W up to 12000W

• 70V/100V Line Direct/Drive Output

• Ultra light average weight 8 kg, compact package 32 cm average deep

• RAM Audio Power Management System (PMS™) and Clip Limiter (ICL™)

• Upside-down design to avoid fan dust accumulation

• Two versiones: with Industry standard Barrier Strips and Phoenix connectors, or with standard Neutrik® XLR and Speakon® connectors

• Optional Dante Domain Manager™ (DDM)/AES67 audio inputs

• Optional GPI for audio mute

• Detented sealed potentiometers, except MDi16-12K

• Optionally tamper proof potentiometers

• Comprehensive protection set (ICL, PMS, turn-on, Temp, DC….)

• Modular construction for an easy after-sales service

• Temperature controlled, front to back cooling fan

• Universal power supply (from 90V to 265V AC) in models: MDi2-6K, MDi4-6K, MDi4-12K, MDi8-6K and MDi16-12K

• ICL2™: improved Intelligent Clip Limiting

• PMS™: Power Management System controls the amount of power that the amp delivers under diferent circumstances

• Faulty Channel Management (FCM™)

• Soft-start, turn-on transients, Over-heating, DC, RF, short-circuit

• Overloaded power supply, Mains sub/over voltage

Output Power MDi2-1K4 MDi2-2K7 MDi2-6K MDi4-2K4 MDi4-6K MDi4-12K MDi8-2K7 MDi8-6K MDi16-12K
4 ohm 2x700W 2x1350W 2x3000W 4x610W 4x1500W 4x3000W 8x340W 8x750W 16x750W
8 ohm 2x375W 2x900W 2x1500W 4x350W 4x800W 4x1500W 8x225W 8x400W 16x400W
Bridge 8 ohm 1x1400W 2x1220W 4x680W 4x1500W 8x1500W
High Z
70Vrms/100Vpeak 2x1350W 4x1500W 4x680W
100Vrms/140Vpeak 1x1400W 2x3000W 2x1200W 4x3000W 4x1500W 8x1500W


MDi2-1K4 MDi2-2K7 MDi2-6K MDi4-2K4 MDi4-6K MDi4-12K MDi8-2K7 MDi8-6K MDi16-12K
Frequency Response (pow. bandw. ±0.25dB) 20Hz – 20kHz
Phase Response (@1W 20Hz-20kHz) ±15 deg
Total Harmonic Distortion (20Hz-20kHz) <0.05%
Intermodulation Distortion (SMPTE) <0.05%
Damping Factor (20Hz-500Hz @8ohm) >400
Crosstalk (20Hz-1kHz) >75dB
Voltage Gain 32dB 26/32/38/44dB
Sensitivity (@32dB) 1.4V 2.1V 2.8V 1.3V 2V 2.8V 1.1V 1.4V 1.4V
Signal to noise ratio 101dB 103dB 104dB 105dB 101dB 103dB 104dB 104dB 104dB
AC Mains
Operat. Voltage (50Hz-60Hz) 170V-265V AC
90-140V AC
90V-265V AC 170V-265V AC
90-140V AC
90V-265V AC 170V-265V AC
90-140V AC
90V-265V AC
Power On Idling (@230V) 0.5 A
1/8 rated pow. (@4 Ohm) 1.8A 4A 4.5A 3.2A 4.5A 9A 4A 4.5A 9A
Dimensions (WxHxD) mm-in 483×88.9×254-19×3.5×10 483×88.9×396-19×3.5×15.5 483×88.9×406-19×3.5×16
Weight (Net) 5kg-11lb 6kg-13.2lb 5kg-11lb 7.5kg-16.5lb 9.5kg-20.9lb 7.5kg-16.5lb 5kg-11lb 12kg-26.4lb

Proteccions: Soft-start, Turn-on Turn-off transients, Muting at turn-on, Over-heating, DC, RF, Short-circuit, Open or mismatched loads, Overloaded power supply, ICL™, PMS™ and SSP™.

• Dante Domain Manager™ (DDM)/AES67 audio inputs:4 inputs channels of Dante™ can be installed in the MDi Series. Sampling frequency can be configured as 48, 96 or 192 kHz. Audio format is Dante Audio over IP and AES67. Two RJ45 connectors are configurable as 1 GHz/100 MHz for Primary/Secondary network, or standard switch. Dante Domain Manager compatible.

• GPI for audio mute: mutes the audio output of all channels to integrate the MDi amplifier in an alarm system.

Last News

• Sep 2019 - Indian RAM Audio distributor mounts the biggest cinema a screen in the country, amplified with MDi amps.

• Aug 2019 - MDi amps Indian distributor exhibits at Big Cine Expo in Mumbai.
(C) C.E. Studio-2 sl. ♦ RAM Audio and RAM logo are registered trademarks of C.E. Studio-2 sl. ♦ Privacy Policy ♦ Design by RAM Audio