Alto PBM8.250 User Manual
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Alto PBM8.250 User Manual

8-channel stereo powered mixer with dsp
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User's Manual
PBM8.250/
8-channel
PBM8.500
Stereo Powered Mixer with DSP
R
LTO
www.altoproaudio.com
Version 1.2 August 2004
English

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Summary of Contents for Alto PBM8.250

  • Page 1 User's Manual PBM8.250/ 8-channel PBM8.500 Stereo Powered Mixer with DSP www.altoproaudio.com Version 1.2 August 2004 English...
  • Page 2 the recommended fuse type as indicated in this manual. SAFETY RELATED SYMBOLS Do not short-circuit the fuse holder. Before replacing the fuse, make sure that the product is OFF and disconnected CAUTION from the AC outlet. RISK OF ELECTRIC SHOCK DO NOT OPEN Protective Ground This symbol, wherever used, alerts you to the pre-...
  • Page 3 LTO PBM8.250/500 is extremely flexible, ultra-low noise 8-channel stereo powered mixer with DSP, which is configured with six MIC/line and two stereo inputs channels, each of them is equipped with a variety of key features including a 3-band equalizer, two aux sends and pan control etc..

  • Page 4: Table Of Contents

    TABLE OF CONTENTS 1. INTRODUCTION.............................4 2. FEATURES..............................5 3. QUICK START............................6 4. CONTROL ELEMENTS...........................7 4.1 MONO/STEREO Input Channel Section 4.2 MASTER SECTION Control 4.3 MASTER SECTION INPUT and OUTPUT Jacks 4.4 DSP Section 4.5 Rear Panel 5. PRESET LIST............................15 6. INSTALLATION AND CONNECTION ....................22 6.1 Audio Connections 6.2 Speaker Connections 6.3 Possible System Connection Mode for Live Sound Application...

  • Page 5: Introduction

    256 position multieffect and built-in feedback terminator and so on. Though your PBM8.250/500 is very easy to operate, we strongly recommend you to go through each section of this manual carefully, in this way you will get the best out of your PBM8.250/500.

  • Page 6: Features

    2. FEATURES The PBM8.250/500 8-channel stereo powered mixer with DSP is designed for professional application. It provides the following features: Digital amplifier technology, offering high power and a very dynamic sound 9-band graphic EQ for MAIN / MONITOR Built-in feedback terminator...

  • Page 7: Quick Start

    3.3 Please connect one side of the speaker cable to speakon or phone jacks of your PBM8.250/500 and the other side to the input socket of your speaker cabinet; or connect one side to the main output L/R of your PBM8.250/ 500 and other side to the input socket of your active speaker cabinet or other stereo power amplifier.

  • Page 8: Control Elements

    4. CONTROL ELEMENTS...

  • Page 10: Mono/Stereo Input Channel Section

    4.1 MONO/STEREO Input Channel Section Your PBM8.250/500 comprises 6 mono input channels CH 6 CH 7-8 and 2 stereo input channels, each of them including -20dB PAD, 3-band equalizer, AUX sends, PAN and LEVEL con- LINE IN t ls. The following content will detail the each part.

  • Page 11: Master Section Control

    MON (AUX1) Control Your PBM8.250/500 has tw auxiliary sends which can be used for sending signals to external or internal effects device or for creating a monitor mix, they are used to adjust the level of respective channel signal sent to AUX bus, and the adjustable range goes from - to +10dB.
  • Page 12 This control is used to adjust the overall volume of main mix output. MAIN MIX LEVEL LED Display The stereo 4 segments LED display is used to monitor the main mix output level. PBM8.250 OPERATING OPERATING LED Display The LED indicates when the power is switched on in your PBM8.250/500.

  • Page 13: Master Section Input And Output Jacks

    PHANTOM 48V Switch It is available only to the XLR MIC sockets. Never plug in a micro- phone when phantom power is already on. Before turning phantom PHANTOM AMPLIFIER power on, make sure that all faders are all the way down. In this MODE way you will protect your stage monitors and main loudspeakers.

  • Page 14: Dsp Section

    LEFT 2-TRACK IN RIGHT Your PBM8.250/500 features dual RCA jacks for 2-track in (left and right). If you wish to listen to your mix from a tape recorder, DAT or cassette, please use these tape input jacks. Depending on the setting of TAPE TO select switch, you can assign the signal coming from the tape recorder (DAT or cassette) to CH9~10 path or main mix bus.

  • Page 15: Rear Panel

    Use it to connect your PBM8.250/500 to the main AC with the supplied AC cord. Please check the voltage available in your country and how the voltage for your PBM8.250/500 is configured be- fore attempting to connect your PBM8.250/500 to the main AC.

  • Page 16: Preset List

    5. PRESET LIST 01. VOCAL1 Pre-delay Rev. Type Hi Damp Rev Time Room Size 1.00 Hall Tape 1.00 Spring 4.50 3.60 Plate Spring 1.20 3.60 Hall Plate 1.50 Plate Spring 2.40 Tape 0.90 1.50 Plate 1.00 Hall Spring 1.00 Tape 2.10 4.50 Plate...
  • Page 17 4.00 -0.96 4.00 -12.00 4.00 -0.96 4.00 -12.00 3.60 -0.96 3.60 -12.00 3.60 -0.96 3.60 -12.00 04. SMALL HALL Pre-delay Hi Damp Rev Time Room Size Rev level 2.90 -0.96 2.90 -12.00 2.90 -0.96 2.90 -12.00 2.10 -0.96 2.10 -12.00 2.10 -0.96 2.10...
  • Page 18 06. SMALL ROOM Pre-delay Hi Damp Rev Time Room Size Rev level 2.10 -0.96 2.10 -12.00 2.10 -0.96 2.10 -12.00 1.50 -0.96 1.50 -12.00 1.50 -0.96 1.50 -12.00 1.00 -0.96 1.00 -12.00 1.00 -0.96 1.00 -12.00 0.70 -0.96 0.70 -12.00 0.70 -0.96 0.70...
  • Page 19 3.60 -0.96 3.60 -12.00 2.90 -0.96 2.90 -12.00 2.10 -0.96 2.10 -12.00 1.30 -0.96 1.30 -12.00 09. SPRING REVERB Pre-delay Hi Damp Rev Time Room Size Rev level -0.96 -12.00 4.50 -0.96 4.50 -12.00 -0.96 -12.00 3.60 -0.96 3.60 -12.00 2.90 -0.96 2.90...
  • Page 20 11. STEREO DELAY Delay Right Delay Left F.B. Right F.B. 12. FLANGER Mod. Freq Pitch. Depth Left F.B. Right F.B. 2.79 2.52 2.33 2.25 2.10 1.99 1.75 1.61 1.34 1.22 1.00 0.80 0.65 0.54 0.42 0.16 13. CHORUS Mod. Freq. Pitch.
  • Page 21 2.33 -3(0) 1.99 -3(0) 1.70 -3(0) 1.35 -2(0) 1.00 -2(0) 0.50 -2(0) 14. REVERB+DELAY Rev Time Room Size Left Delay Right Delay Left F.B. Right F.B. Rev level 2.90 2.90 2.90 2.90 2.40 2.40 2.40 2.40 2.10 2.10 1.50 1.50 1.50 1.50 1.00...
  • Page 22 16. REVERB+CHORUS Rev Time Room Size Mod. Freq. Pitch. Depth Left F.B. Rev level 2.90 4.74 2.90 4.12 2.90 3.67 2.90 3.02 2.90 2.63 2.90 1.99 2.90 1.35 2.90 0.50 1.50 4.74 1.50 4.12 1.50 3.67 1.50 3.02 1.50 2.63 1.50 1.99 1.00...

  • Page 23: Installation And Connection

    6. INSTALLATION AND CONNECTION Ok, you have got to this point and you are now in the position to successfully operate your PBM8.250/500. However, we advise you to read carefully the following section to be the real master of your own mix. Not paying attention enough to the input signal level, to the routing of the signal and the assignment of the signal will result in unwanted distortion, a corrupted signal or no sound at all.

  • Page 24: Speaker Connections

    The power connector has four terminals: 1+, 1-, 2+, 2-. Speakon connector Your PBM8.250/500 features three modes for connecting the main speakers. The speaker impedance requirement varies depending on how you connect the speaker. In order to avoid damaging your built-in amplifier, please pay more attention to the impedance of speaker.
  • Page 25 Here some illustrations will give you some helpful suggestions. Main Speaker LEFT/MONO MAIN OUTPUT 2 AMPLIFIER MODE OUTPUT 2 OUTPUT 1 RIGHT/MONITOR BRIDGE MODE OUTPUT 1 BRIDGE OUTPUT 2 MAIN MAIN BRIDGE MAIN MONITOR Bridge Mode Main Speaker LEFT/MONO MAIN AMPLIFIER OUTPUT 2 MODE...

  • Page 26: Possible System Connection Mode For Live Sound Application

    Here shows the PBM8.250/500 in a live sound system. The following section explains the basic connection and operating. For input section, connect three or more microphones to mono MIC channels (1~3); connect synthesizers or signal processor to either line input of stereo channel 7~8 or line input of mono channel;...

  • Page 27: Technical Specification

    7. TECHNICAL SPECIFICATION Mono input channels Microphone input electronically balanced, discrete input configuration Frequency response 10Hz to 55kHz, + Distortion (THD & N) 0.006% at 4dBu, 1kHz Gain 50dB (MIC) SNR (Signal to Noise Ratio) >90dB Line input electronically balanced Frequency response 10Hz to 55kHz, Distortion (THD &...
  • Page 28 100 ~ 120V : T10AL 210 ~ 240V : T6.3AL Physical Dimension (W D H) 550mm 220mm 310mm (8.66" 12.20" 21.65") Weight PBM8.250 (Net) : 14kg (30.86lb) (Gross) : 15kg (33.07lb) PBM8.500 (Net) : 15kg (33.07lb) (Gross) : 16kg (35.27lb)

  • Page 29: Warranty

    8. WARRANTY 1. WARRANTY REGISTRATION CARD To obtain Warranty Service, the buyer should first fill out and return the enclosed Warranty Registration Card within 10 days of the Purchase Date. All the information presented in this Warranty Registration Card gives the manufacturer a better understanding of the sales status, so as to purport a more effective and efficient after-sales warranty service.
  • Page 30 No.1, Lane 17, Sec. 2, Han Shi West Road, Taichung, 401 TAIWAN http://www.altoproaudio.com Tel:886-4-22313737 email: alto@altoproaudio.com Fax:886-4-22346757 All rights reserved to ALTO. All features and content might be changed without prior notice. Any photocopy, translation, or reproduction of part of this manual without written permission is forbidden. Copyright...

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Pbm8.500

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