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Inter-m PX-1650 Operating Manual

Stereo built in x-over
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PX-1650
Stereo Built In X-OVER

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Summary of Contents for Inter-m PX-1650

  • Page 1 PX-1650 Stereo Built In X-OVER...

  • Page 2: Table Of Contents

    8. Operating Tips........................17 9. Applications ........................26 10. Block Diagram........................27 11. Specifications........................28 OFFICE : 226-9 DUGJUNG - LI, HOE CHUN - EUB, YANGJU - KUN, KYUNGKI - DO, KOREA TEL : 82-351-860-7041~5, FAX : 82-351-858-1907 Home Page : http://www.inter-m.co.kr, http://www.inter-m.com E-mail : export@inter-m.co.kr...

  • Page 3: Introduction/Unpacking And Installation

    Introduction Introduction Thank you for purchasing a PX-1650 Stereo Quad Powered Mixer Built in X-OVER. The PX-1650 Series provides an excellent balance of operability, functionally and ease of use. In order to take full advantage of the PX-1650 Series capabilities and enjoy years of trouble-free use, please read this manual carefully.

  • Page 4: Features

    Features - PX-1650 MONO INPUTS CHANNELS The PX-1650 stereo quad powered mixer built in x-over provides 8, 12 channels of mono input that can be mixed down to a stereo, 2 monitor, 2 EFFECT SEND output. - XLR type connectors are provided for MIC jacks and 1/4” TRS connectors are provided for the LINE jacks.

  • Page 5: Precautions

    Strong physical shocks to the unit can cause damage. Handle it with care. - DO NOT OPEN THE CASE OR ATTEMPT REPAIRS OR MODIFICATIONS YOURSELF This product contains no user-serviceable parts. Refer all maintenance to qualified Inter-M service person- nel. Opening the case and/or tampering with internal circuitry voids the warranty.

  • Page 6: Front Panel Controls

    3. EQUALIZER CONTROLS MON 1 This set of four controls allows you to individually modify the channel’s response. Each channel of the PX-1650 is equipped with a 3 band equalizer (EQ) that has shelving MON 2 HIGH and LOW controls, and a peaking MID control...
  • Page 7 Effect 2 mixing bus. The channel signals mixed by this bus are sent via the EFFECT SEND 2 Control to the EFFECT SEND 2 jack on the top panel. The output signal is also fed into the PX-1650 internal digital signal processor. Thus, a signal fed to the Effect 2 bus using this control can be processed externally or internally.
  • Page 8 This set of three controls allows you to individually MON 1 modify the stereo input response. Stereo channel of the PX-1650 is equipped with the 3 band equalizer (EQ) that MON 2 has shelving HIGH, LOW, and Peaking MID controls.
  • Page 9 Refer to “Using the Digital Signal Processor” on page 15 for details on the use of this section. 4. STEREO GRAPHIC EQUALIZER SECTION The PX-1650 Series internal stereo graphic equalizer (GEQ) allows the fine response shaping of the main program output. This section has seven linear controls, corresponding to center frequencies of 63Hz, 160Hz, 400Hz, 1kHz, 2.5kHz, 6.4kHz, 15kHz.
  • Page 10 TAPE IN jacks on the top panel. This playback signal is added to the bus in front of GEQ, allowing the PX-1650 to equalizer the signal from the tape deck before output.

  • Page 11: Top Panel Controls

    1. 2. CHANNEL INPUT CONNECTORS Each of the PX-1650 input channel is provided with both a balance XLR connector (1) and a balance tip-ring-sleeve 1/4” phone jack (2). The channel’s input signal is used to select between these input con- nectors signal sources that don’t require phantom power should be connected to the phone jack (2)
  • Page 12 5. STEREO CHANNEL INPUT CONNECTORS Each of the PX-1650 stereo input channel’s is provided with both a unbalanced 1/4” phone jack. To return a monophonic signal to both channels of the master stereo mixing bus, use the stereo input L jack (The R jack should be left open).
  • Page 13 Although both these jacks output the same monitor mix signal, their output levels can be adjusted individually using the corresponding MONITOR output level controls on the front panel. These jacks have a nominal output level of +4dB. PX-1650...

  • Page 14: Rear Panel Controls

    760W X-OVER OUTPUT 1. POWER SWITCH This switch turns the PX-1650 power supply on and off. The power LED on the front panel will light when the power is on. 2. SPEAKER OUTPUT JACKS These standard 1/4” phone jacks and speaker connect jacks are main speaker level output from the PX-1650 power amplifier.
  • Page 15 X1: 60Hz to 250Hz X10: 600Hz to 2.5kHz 5. CROSS FREQUENCY CONTROL Crossover frequencies are set by adjusting the X-over frequency control. The PX-1650 Processes 24dB/octave Roll-Off. 60Hz 250Hz 6. GAIN CONTROL The Low-Output gain levels are selected by this control (-6dB to +6dB).

  • Page 16: Speaker Connections

    X-OVER FREQUENCY BRIDGED MONO AMP 3/4 AMP 1/2 AMP 4 AMP 3 AMP 2 AMP 1 AMP 4 TRIM AMP 2 TRIM INPUT 230V 50Hz HIGH HIGH X-OVER OUTPUT ※ CAUTION: You must set the X-over switch to By-pass Mode. PX-1650...
  • Page 17 ※ CAUTION: When you apply to X-OVER MODE, you must connect correctly for protecting speakers from being damaged. First, confirm output terminal on the rear panel of PX-1650, and then connect tweeter speakers to CH1 & CH3 output and woofer speakers to CH2 & CH4 output.
  • Page 18 AMP 1/2 AMP 4 AMP 3 AMP 2 AMP 1 AMP 4 TRIM AMP 2 TRIM INPUT 230V 50Hz HIGH HIGH X-OVER OUTPUT ※ CAUTION: You must set the X-over switch to Bridged Mono and apply input to CH1, CH3. PX-1650...

  • Page 19: Operating Tips

    Operating Tips ※ CAUTIONS FOR CONNECTED SOURCES Please observe the following cautions when connecting sound sources to the PX-1650. - TURN THE POWER OFF FIRST Always make sure that the mixer’s POWER switch is turned off before connecting or disconnecting any cables.
  • Page 20 The channel faders have an optimum range that provides the maximum control margin with minimum noise and distortion. The optimum range for the channel faders on the PX-1650 is between about “5” and “15” on their scales. There is no rule that says you must avoid higher or lower settings, but remember that the best sound quality can be achieved within this range.
  • Page 21 1 provides a “standard” setting, that is, a variation that is deemed as being most characteristic of that program type. To quickly audition the PX-1650 effects, set the parameter at “1” and change the program through its 16 different positions.
  • Page 22 Fast flange/100ms Dark Gate Medium-slow wide chorus/150ms Bright Gate Medium-slow wide chorus/150ms Dark Gate Medium-slow wide flange/150ms Bright Gate Medium-slow wide flange/150ms Dark Gate Medium-slow wide chorus/200ms Bright Gate Tremolo chorus/200ms Dark Gate Medium-Slow wide flange/200ms Bright Gate Fast flange/200ms Dark Gate PX-1650...
  • Page 23 2.5s Warm Chamber, Chorus w/50ms 33% regen DDL 1.8s Bright Hall, Medium wide chorus w/75ms 30% regen DDL 1.2s Warm Room, Medium wide chorus w/125ms 25% regen DDL 1.2s Bright Plate, Tremolo chorus w/70ms Slap DDL 2.5s Bright Plate, Slow wide chorus w/125ms Slap DDL PX-1650...
  • Page 24 Bright 1.5s Medium Room Dark 1.5s Medium Room Warm 2.0s Large Room Bright 2.0s Large Room Warm 2.5s Large Room Bright 2.5s Large Room Dark 2.0s Medium Hall Bright 2.0s Medium Hall Dark 3.5s Medium Hall Warm 3.5s Medium Hall PX-1650...
  • Page 25 Warm 0.8s Chamber Bright 1.5s Chamber Bright 2.5s Chamber Bright 0.5s Soft Attack Plate Bright 0.5s Hard Attack Plate Warm 0.8s Hard Attack Plate Warm 1.5s Soft Attack Plate Warm 2.5s Soft Attack Plate Warm 2.5s Hard Attack Plate PX-1650...
  • Page 26 2 controls will adjust the level of the signal output by the internal DSP, and any input signals to the EFFECT RETURN 2 jacks will be ignored. The current program selection is indicated by the bank of LED indicators at the top of the DIGITAL EFFECT section. To change the program or parameter selection, simply turn the program control. PX-1650...
  • Page 27 ※ CONNECTING SPEAKERS The PX-1650 Powered Mixer has two 1/4” phone jack and two speaker connect jack speaker outputs per channel. The outputs for each channel are connected in parallel internally. This places some restrictions on their use, as described below;...

  • Page 28: Applications

    CHANNEL 1 CHANNEL 2 POWER PROT CLIP CLIP POWER R-150/300 Headphones Graphic Equalizer PEAK LO-CUT LEFT POWER 1.25K 1.6K 2.5K 3.15K 6.3K 10K 12.5K 16K LEVEL PEAK LO-CUT RIGHT 1.25K 1.6K 2.5K 3.15K 6.3K 10K 12.5K 16K LEVEL EQ-9231 PX-1650...

  • Page 29: Block Diagram

    STEREO BUILT IN X-OVER Block Diagram Block Diagram PX-1650...

  • Page 30: Specifications

    Specifications ............Specifications 0dB=0.775Vrms - ELECTRICAL Maximum Output Power PX-1650: 250W + 250W + 250W + 250W/4Ω (0.5% THD at 1kHz) T.H.D Channel Input to Post-GEQ OUT: Less than 0.1%, +4dB output (20Hz~20kHz) Post-GEQ IN to SPEAKER OUT: PX-1650: Less than 0.1%, 250W Output into 4Ω...
  • Page 31 600Ω 10kΩ Phone Jack (TRS) (Pre-GEQ) T=Out R=In S=GND Line Insert Out 600Ω 10kΩ Phone Jack (TRS) (Post-GEQ) T=Out R=In S=GND Phones Out 100Ω 40Ω Stereo phone jack * Specifications and design subject to change without notice for improvements. PX-1650...
  • Page 32 MADE IN KOREA 9007907610...

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