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M 28Q

4-Channel Power Amplifier for Touring and Installations

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SPECIFICATIONS:

GENERAL     
Number of channels4    
Output power4 Ω8 Ω100V70V8 Ω bridged
     EIAJ test standard, 1 kHz, 1% THD4 x 700 W4 x 360 Wn/an/a1,400 W per channel pair
Max. output voltage85 V(peak)
Max. output current60 A(peak)



AC MAINS POWER     
Power supplyUniversal, regulated switch mode
Operating voltage100 V - 240 V (factory selection) ± 10%, 50 Hz - 60 Hz
Consumption / current draw @ 230 V@ 115 V
    Idle62 W0.51 A0.6 A
    1/8 of max. output power @ 4 Ω*580 W3.74 A7.48 A
    1/4 of max. output power @ 4 Ω*1,066 W6.52 A13.04 A



THERMAL     
Environmental operating temperature0-45° C / 32-113° F 
Thermal dissipationFan, continuously variable speed, temperature controlled, front to rear airflow
    Idle53 kcal/hr212 BTU/hr 
    1/8 of max. output power @ 4 Ω*198 kcal/hr785 BTU/hr 
    1/4 of max. output power @ 4 Ω*315 kcal/hr1,249 BTU/hr 



AUDIO     
Gain32dB, 30dB, 28dB, 26dB, 24dB, 22dB, 20dB, 18dB, 14dB, 4dB, -∞, user selectable
Input sensitivity @ 8 Ω1.34 V / 4.76 dBu   
Max input level6 V / 17.8 dBu   
Input impedance10 kΩ   
Frequency response10 Hz - 30 kHz (1 W @ 8 Ω, ± 3 dB)
THD+N / SMPTE IMD< 0.05% @ 1/2 of full power
DIM100 IMDtyp. <0.005% (<0.02% @ >0.1 W)
S/N ratio>111 dBA (20 Hz - 20 kHz, A weighted)
Crosstalk separation>70 dB @ 1 kHz
Slew rate40 V/µs @ 8 Ω, input filter bypassed
Damping factor @ 8 Ω>5000 @ 100 Hz



FRONT PANEL
Indicators3 LEDs per channel: 2 x green, 1 x red 
3 status LEDs: 1 x green, 1x white, 1 x yellow
Controls1 stepped level attenuator pot per channel
Mains switch
MaintenanceDust filters foam behind front panel



REAR PANEL
Audio signal input connectors4 x balanced Neutrik® XLR female
Loudspeakers output connectors4 x Neutrik® Speakon NL4MD
AC mainsIEC C13 16A connector; AC mains cord with 3-pin plug 15A for US, IEC Schuko 16 A for every other nation
Controls2 x link switch, linking analog inputs 1 & 2 and 2 & 4



CONSTRUCTION
DimensionsW 483 mm / 19", H 44.5 mm / 1U, D 358 mm / 14.1"
Weight7.3 kg / 16 lbs
Chassis1 mm (0.04”) steel chassis and steel removable dust cover, 3 mm (0.12”) steel front panel, screw hole preotection, steel side reinforcement & rear support



M28Q DSP+ETH
ADDITIONAL SPECIFICATIONS
  
Output power4 Ω8 Ω100V70V8 Ω bridged
    EIAJ test standard, 1 kHz, 1% THD2 x 700 W2 x 360 Wn/an/a1,400 W per channel pair
  
REAR PANEL 
Network data port Ethernet1 x RJ45 with activity LED with 2 rotary address switches
DSP preset selection2 x Pushbutton (stepping through bank of 4 presets) 
2 x 4 LED preset indicators



DSP
A/D converterDual 24bit 24/48 kHz Tandem® architecture, dynamic range 118 dB(A) mono, 100 dB(A) stereo, THD <0.02% (20 Hz - 20 kHz)
D/A converterDual 24bit 24/48 kHz Tandem® architecture, 115 dB(A) dynamic range, THD <0.02% (20 Hz - 20 kHz)
PresetsBank of 4 presets, management and upload via  Armonía Pro Audio Suite™
Delay for time alignment<10 ms per output
Crossover filtersButterworth, Linkwitz-Riley, Bessel, 6dB/oct to 48dB/oct
Output equalizerUp to 9 fully parametric per channel: peaking, hi/lo shelving, hi/lo pass, band pass, band stop, all pass
Input equalizer5 types (PEQ, shelving, band pass, band stop, all pass)
LimitersPeak limiter, RMS limiter, frequency dependent RMS limiter

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