Overview

• Mid-size very high performance  active 3-way studio monitor

• Ideally suited to:

  – critical near-field listening applications in all control rooms

  – LCR surround monitoring in medium control rooms

  – surround channels in medium-to-large contol rooms

• ATC hand built 6.5˝/164mm carbon-paper cone bass driver.

• ATC 25mm/1” Dual-Suspension ‘S-Spec’ Tweeter

• Discrete MOSFET class A/B tri-amp pack with 150W/60W/25W

  continuous power output

   

Specifications

Drivers: HF 1″/25mm Dual-Suspension ‘S-Spec’,  Mid 3″/75mm Soft Dome, LF 6.5″/164mm short-coil carbon paper cone
Amplitude Linearity (±2dB): 70Hz-17kHz
Cut-off Frequencies (-6dB, free-standing): 42Hz-25kHz
Dispersion: ±80° Coherent Horizontal, ±10° Coherent Vertical
Max. Continuous SPL (1 metre): 112dB
Audio Input: Rear panel mounted female xlr (pin 2 +)
Input Sensitivity: 1V rms (ref. full output)
Input Sensitivity Trim: 0dB to -6dB/1V – 2V (continuously variable via rear panel trimmer)
Input Impedance: Balanced > 10kΩ
Amplifier Output Power: Bass 150W rms, Mid 60W rms, High 25W rms
Crossover Frequencies: 380Hz & 3.5Khz
Crossover Filters: 4th order critically damped with phase compensations
Low Frequency Boost: 0dB to +3dB at 40Hz (continuously variable via rear panel trimmer)
Overload Protection: Active FET momentary gain reduction
Dimensions (HxWxD): 353 x 600 x 375mm (13.9˝ x 23.6˝ x 14.8˝).  Handles add an additional 39mm/1.5″ to depth.
Weight: 36kg / 79.2lbs (per cabinet)

R 3 – 2 3 4 P r o
3 – C h a n n e l  R e m o t e  A m p s  f o r   S C M 2 5 / 4 5

O v e r v i e w

3-channel 5U/19” rack mount amplifier to partner SCM25/45Ai and 45AiW Pro loudspeakers.
Each channel features 3-way active crossovers and three power amplifiers; Bass, Mid, High Frequency
Speaker level audio connections via Neutrik NL8 connectors.
Amplifier front panel mounted bi-colour LEDs display power on/off and limiter ‘active’.
Amp-to-speaker power / limit LED connections via 5-pin XLR.
Speaker & LED cable assemblies supplied separately and built to order. Lengths must be specified.

E l e c t r o n i c  S p e c i f i c a t i o n s

Specifications are for a single channel of the 3-channel amp.
Balanced Input: Rear Panel Mounted Female XLR, pin 2 hot.
Input Impedance: 20kΩ (differential).
Input CMRR: >82dB (10kHz).
Input Sensitivity: 2.2dBu/1Vrms for full power.
Input Sensitivity Control: Continuously Variable from 2.2dBu-8.2dBu/1Vrms-2Vrms (-6dB).
Internal adjustment.
Bass Boost Control: Continuously variable from 0dB to +3dB. Internal adjustment.
Crossover Filters: 4th Order Linkwitz-Riley at 380Hz and 3.5kHz.
Frequency Response: <2Hz to >200kHz (-3dB).
Amplifier type: Grounded Source MOSFET based Class A/B, convection cooled.
Output Power: Bass 150W (8Ω), Mid 60W (8Ω), HF 32W (6Ω).
THD+N: <0.003%/-92dB (1kHz, 1dB below rated power, 90kHz BW)
Limiter: ATC Active FET Momentary Gain Reduction, limiter ‘active’ indicated via LEDs
on amp & speaker front panels.
Speaker Level Output: Rear Panel Mounted Neutrik NL8.
Power/Clip LED Output: 1 x Rear Panel Mounted 5-Pin Female XLR.
Mains Input: 220-230V or 115V – Factory set. Please observe panel markings and labels!
Power Consumption: Idle 24W/35VA. 1/8th Power 117W/159VA. Full Power 255W/324VA.
Heat Output: Idle 82BTU/hr. 1/8th power 335 BTU/hr. Full Power 358BTU