SEIKAKU TECHNICAL GROUP LIMITED NF03570 -RS SPA-12 _V1.0 SPA-12 0.04kg/1 NH00149 1:2 / NH00231 1:4 A5 A3 A4 5 APR.14.
User's Manual MIXER PREAMPLIFIER
1 1 2 3 4 7 14 15 17 01 SAFETY RELATED SYMBOLS 02 WARNING 03 IMPORTANT SAFETY INSTRUCTION 04 INTRODUCTION 05 CONTROL ELEMENTS 06 INSTALLATION & CONNECTION 07 BLOCK DIAGRAM 08 TECHNICAL SPECIFICATION 09 TROUBLE SHOOTING INDEX Likely Cause Power not switched on Speaker not connected to active AC power Switch on power and verify that power Led is on Verify that speaker is connected and that the circuit is on What to do Hum or Buzz Improper system gain structure Excessively long unbalanced cab
-70dB@1kHz(Ch1-6); Adjacent Input Between Live+Negative Earth Noise (Bus noise) Max output MIC output,MONO output Line output Physical Power supply Net :2.
When the apparatus needs a cleaning, you can blow off dust from the apparatus with Cleaning Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety.
14 BLOCK DIAGRAM 3 GETTING STARTED (1) Please check the AC voltage available in your country before connecting your preamplifier to the AC socket; (2) Be sure that the main power switch is turned off before connecting to the AC socket. Also you should make sure that all input and output controls are turned down. This will avoid damage to your speaker and avoid excessive noise. (3) Before turn on the preamplifier you should connect it to a power amplifier and turn on the mixer BEFORE the power amplifier.
CH 1 10 SIG 0 CH 2 10 SIG 0 CH 3 10 SIG MIC IN 0 CH 4 10 2 SIG 0 CH 5 1 10 SIG 0 CH 6 10 SIG 0 10 CH 7/8 SIG 0 10 CH 9/10 STEREO IN SIG 0 10 CH 11/12 0 OUT MIC 3 10 +10 0 -10 MID +10 0 ON -10 OFF LOW EQ 4 +10 0 HIGH -10 0 5 OUT 10 MONO L SIG 0 +10 CLIP 6 R 0 OUT 7 10 MASTER 8 OFF ON SPA-12 MIXER PREAMPLIFIER 9 frequency of 80Hz. 4 will sound much bigger than what it is.
12 1=Ground/Screen (seen from soldering side) 1 (seen from soldering side) 3 3-pin XLR Line Socket 2=Hot(+) Tip=Send Signal 3-pin XLR Male Plug 1=Ground/Screen 2 Ring=Return Signal Sleeve=Ground/Screen Ring Use for Inserts Points Tip 1/4" Stereo (TRS) Jack Plug Sleeve 1/4" Mono (TS) Jack Plug Use for Main output (For unbalanced use, leave pin 3 unconnected) 1 Sleeve=Ground/Screen Tip=Signal Use for Balanced Mic Inputs (For unbalanced use, connect pin 1 to 3) 3 Tip Use for Mono Lin
6 The muting circuitry activates in the presence of signal from Mic 1.This potentiometer determines the mixing level of Mic or line input signals with signals of priority channels, adjusting it to minimum shall cut off all other inputs when signal is presence in priority channel (Mic 1). Whereas setting it to max shall allow free mix of all signals including priority input.
INPUT 1 MPA-120RS-ECHO P.A. AMPLIFIER ZONE PAGING SELECTOR TREBLE 5 MASTER OUTPUT PH PH PH PH PH PH MONITOR SPEAKER 10 Note that the priority mute level potentiometer is adjusted to the maximum to allow the mute feature to be fully active. This level can be adjusted mid way or so if it is to allow a paging to be made with background music audible at lower volume.
8 It is important that the mains power is connected to your equipment with earth and the power syst e m has a proper earthing. When hum exists, it is possibly due to poor grounding connection of your system. There should be only one ground point in the entire system. Pin 1 of XLR source equipment should be connected whereas at the destination, this pin is dismantled. This shall eliminate grounding loop due to connections of signal ground and power ground.
