S Series | RAM Audio

Overview

Modern power amplifiers have developed into light, powerful, versatile, rugged and reliable instruments designed to keep working in the most arduous conditions. At RAM Audio, we have an enviable reputation in the industry, and continue to stay at the forefront of audio design by offering our many customers all those concepts combined with the following major advantage: a sensible price level for our pedigree products.

This is made possible by our constant development of state-of-the-art designs, together with meticulous component selection and rigorous supervision of assembly quality.

The S Series of RAM Audio amplifiers distils all these features to fulfill all your needs, whether you’re starting a P.A. amplifier project from scratch, or you need to upgrade your present sound reinforcement equipment. In the S Series amps, you’ll find five 2-channel models and five 4-channel models, all offering plentiful power levels at low distortion in the range of 1.5 to 6 kilowatts, yet weighing in around 8 kilos and 30 cm deep.

Features

• Ultra-compact and lightweight 2-U high

• Laser cut aluminum front panels with integrated carrying handles

• Neutrik® XLR input connectors, input and signal link in 2 channel models

• Input Link switch: allow daisy-chaining of the input signal

• Neutrik® Speakon® output connectors

• Detented sealed potentiometers for easy recall of volume settings

• ICL™, PMS™, Hi-temp, Signal indicators per channel

• Power on and Stand-by leds

• Highly versatile with multiple configuration and additional module options

• Optional low latency 24bits 120dB DSP with post-DSP signal links. More info…

• Switchable ICL™ clip-limiters per channel

• Switchable (30-50 Hz) sub-sonic highpass filter per channel

• Three-position gain selector (26, 32 or 38 dB)

• Dual or bridge mode selector

• Twin temperature controlled, back to front cooling fans

• Oversized power components (high SOA reserve specification)

Protections

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

• SSP™: SOA Sentry Protection effectively limiting the power that the amp could deliver into an incorrect load or to a direct short-circuit

• ICL2™: improved Intelligent Clip Limiting

• Input signal muting at turn on

• Thermal overload protection

• Progressive Ramp input signal

Specifications

Output Power	S1500	S2000	S3000	S4000	S6000	S3004	S4004	S4044	S6004	S6044
2 ohm	2x975W	2x1360W	2x2060W	2x2460W	2x4225W	4x890W	4x1170W	–	4x2080W	–
4 ohm	2x610W	2x880W	2x1240W	2x1600W	2x2600W	4x580W	4x820W	4x1230W	4x1280W	4x2110W
8 ohm	2x340W	2x500W	2x680W	2x900W	2x1540W	4x320W	4x510W	4x830W	4x770W	4x1360W
Bridge 4 ohm	1x1950W	1x2720W	1x4120W	1x4920W	1x8450W	2x1780W	2x2340W	–	2x4160W	–
Bridge 8 ohm	1x1220W	1x1760W	1x2480W	1x3200W	1x5200W	2x1160W	2x1640W	2x2460W	2x2560W	2x4220W

Continuous Power
2 ohm	2x880W	2x1190W	2x1570W	2x1950W	2x2950W	4x700W	4x980W	–	4x1440W	–
4 ohm	2x575W	2x790W	2x1100W	2x1380W	2x2025W	4x500W	4x670W	4x975W	4x1000W
8 ohm	2x325W	2x460W	2x630W	2x810W	2x1250W	4x300W	4x430W	4x690W	4x620W	4x1015W

High Z
70Vrms/100Vpeak	–	–	2x1240W	2x2460W	–	–	–	4x1200W	4x1500W	–
100Vrms/140Vpeak	1x1140W	1x2500W	–	–	2x2800W	2x1100W	2x2000W	–	–	4x1700W

		S1500	S2000	S3000	S4000	S6000	S3004	S4004	S4044	S6004	S6044
Frequency Response (power bandwidth ±0.25dB)		20 Hz – 20 kHz
Phase Response (@1W 20Hz-20kHz)		±15 deg
Total Harmonic Distortion (20Hz-20kHz)		<0.05%
Intermodulation Distortion (SMPTE)		<0.05%
Damping Factor (20Hz-500Hz @8ohm)		>500
Crosstalk (20Hz-1kHz)		>75 dB
Voltage Gain (selectable)		26/32/38 dB
Sensitivity		2.6/1.3/0.6V	3.0/1.5/0.8V	3.6/1.8/0.9V	4.0/2.0/1.0V	5.0/2.5/1.3V	2.6/1.3/0.6V	3.0/1.5/0.8V	3.7/1.9/0.9V	3.5/1.8/0.9V	5.0/2.5/1.3V
Signal to noise ratio		112 dB	113 dB	115 dB	116 dB	118 dB	112 dB	113 dB	116 dB	116 dB	118 dB
Required AC Mains	Operat. Voltage (50Hz-60Hz)	170 V – 265 V AC
	1/8 rated power (230V/4ohm)	4 A	4.8 A	6.2 A	7.5 A	10.5 A	6 A	7.5 A	11 A	10.5 A	15 A
Dimensions (And x Alt x Pro)		483×88.9×310 mm – 19×3.5×12.2 inches
Weight (Net)		8 kg – 17.6 lb		8.5 kg – 18.7 lb					8.6 kg – 18.9 lb

Protections: 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™.

DSP

Digital Signal Processor fully programmable through an USB port. These are the Processor’s main characteristics:

• 4 Inputs/4 Outputs or 2 In/2 Out free route configurable.

• High performance 120dB 24 bit AD/DA converters

• Output Delay: 0 to 7.1 meters (20.69ms) per channel.

• XOver: Up to 48dB/oct Butterworth, Linkwitz-Riley and Bessel.

• EQ: 9 filters per channel (Parametric, Shelving, LP,HP,BP,SB).

• Gain, Mute and Phase inversion per channel.

• RMS Power and Peak Voltage output limiter per channel.

• Real Time operation from USB or front panel configuration.

More info…

Options

• Standard Signal Inputs Module: The S Series amps are equipped as standard with twin Neutrik® XLR, doubled by two other XLR connectors for linking purposes. In the 4 Channel models an XLR input per channel is provided with the signal linking facility.

• Analog Processor Module: permits a very easy, user-friendly signal processing to enable the amp to set up a bi-amp system without any other outboard device. These are the Processor’s main characteristics:

• 2-way stereo crossover (dual mono or single bridged sub output)

• 24dB/oct Linkwitz-Riley configurable crossover (90, 100 o 120Hz)

• Adjustable attenuation in the High-pass outputs (-3, -6 or -9dB)

• Adjustable Limiter, relative to Max. Output (-3, -6 or -9dB)

• DSP_S Module: Digital Signal Processor fully programmable through an USB port. These are the Processor’s main characteristics: