GEMINI XTR400
ACTIVE SUB WOOFER SYSTEM SCHEMATIC AND PART LIST
ACTIVE SPEAKER SYSTEM SUBWOOFER/SATELLITES
The XTR-400 features a unique design for ease in transporting. The 2 satellite speakers conveniently fit into a special recessed section of the subwoofer and are securely fastened using a strap that attaches to the handles
The XTR-400 features a unique design for ease in transporting. The 2 satellite speakers conveniently fit into a special recessed section of the subwoofer and are securely fastened using a strap that attaches to the handles
SETUP
There are various ways to set up this system:
BASIC SETUP
the basic setup is, perfect for small parties and venues. The ideal location for your subwoofer is close to a wall or in a corner. This will give you the fullest bass response. Your 2 satellite speakers can be placed up on stands on each side (stands must be purchased separately).
TWO-SYSTEM SETUP:
This setup is perfect for larger venues. This setup requires 2 XTR-400 systems. This will give you a total of 800 watts rms Place a subwoofer on each side to the left and right. Using the high-hat hardware and connecting pole (which can be purchased separately), place the pole in the high-hat socket on the subwoofer, and a satellite speaker on top of the pole. The 2 remaining satellite speakers may be used as either floor monitors, or placed on stands elsewhere in the room giving you a louder and fuller sound. Each speaker system in this setup must be used in MONO mode (see Mono section). Connect the system that is on the left side of the audience to the LEFT channel of your mixer, and the system that is on the right side of the audience to the RIGHT channel of your mixer.
There are various ways to set up this system:
BASIC SETUP
the basic setup is, perfect for small parties and venues. The ideal location for your subwoofer is close to a wall or in a corner. This will give you the fullest bass response. Your 2 satellite speakers can be placed up on stands on each side (stands must be purchased separately).
TWO-SYSTEM SETUP:
This setup is perfect for larger venues. This setup requires 2 XTR-400 systems. This will give you a total of 800 watts rms Place a subwoofer on each side to the left and right. Using the high-hat hardware and connecting pole (which can be purchased separately), place the pole in the high-hat socket on the subwoofer, and a satellite speaker on top of the pole. The 2 remaining satellite speakers may be used as either floor monitors, or placed on stands elsewhere in the room giving you a louder and fuller sound. Each speaker system in this setup must be used in MONO mode (see Mono section). Connect the system that is on the left side of the audience to the LEFT channel of your mixer, and the system that is on the right side of the audience to the RIGHT channel of your mixer.
USING THE SIGNAL GROUND LIFT
SWITCH:
Depending on how your sound system is hooked up, sometimes applying the ground will create a quieter signal path. Sometimes lifting the ground can eliminate ground loops and that annoying hum to give you quieter and cleaner overall sound.
1. With the power amp ON, listen to the system in idle mode (no music or signal) with the ground ON. The SIGNAL GROUND LIFT SWITCH will be in the left position.
2. Turn the power OFF before moving the SIGNAL GROUND LIFT SWITCH . Now lift the ground by moving the SIGNAL GROUND LIFT SWITCH to the right. Turn the power back ON and listen to determine which position makes the overall sound quieter with the least amount of noise and hum.
Depending on how your sound system is hooked up, sometimes applying the ground will create a quieter signal path. Sometimes lifting the ground can eliminate ground loops and that annoying hum to give you quieter and cleaner overall sound.
1. With the power amp ON, listen to the system in idle mode (no music or signal) with the ground ON. The SIGNAL GROUND LIFT SWITCH will be in the left position.
2. Turn the power OFF before moving the SIGNAL GROUND LIFT SWITCH . Now lift the ground by moving the SIGNAL GROUND LIFT SWITCH to the right. Turn the power back ON and listen to determine which position makes the overall sound quieter with the least amount of noise and hum.
SCHEMATIC
CLICK ON THE IMAGE TO ZOOM IN
PART LIST
Item
|
Designators
|
Description
|
MAIN PCB:
|
||
1
|
ZD3, ZD2
|
ZENER DIODE 1/2W 12V (RD12EB2)
|
2
|
D3, D1, D2
|
SILICON DIODE 1N4148
|
3
|
ZD1
|
ZENER DIODE 1/2W 24V (RD24EB2)
|
4
|
Q1
|
SILICON TRANSISTORS 2SC1815
|
5
|
Q2
|
SILICON TRANSISTOR 2SC4793
|
6
|
C18, C13
|
ELECTROLYTIC CAPACITORS 6800ยต/50V
|
7
|
REC1
|
BRIDGE RECTIFIER KBPC804W
|
8
|
U3, U2, U4, U1
|
INTEGRATED CIRCUIT TDA7294V
|
CROSSOVER PCB:
|
||
9
|
VR1, VR2
|
ROTARY VR 10KA L:15MM
|
10
|
LD1
|
LED (GREEN) 5mm
|
11
|
IC1, IC3, IC2
|
INTEGRATED CIRCUIT NJM4558DD (BA15218,M5218AP)
|
CONNECTION BALANCE AND UNBALANCED
INPUT SECTION: There are two parallel input connectors (one female XLR and
one 1/4” jack) per channel. Either can be used as an input or as a link
to chain amplifiers.
XLR INPUT JACKS: XLR INPUT JACKS electronically balanced inputs accept a
standard XLR male connector. Pin 1 = shield/ground, pin 2 = hot or
positive (+) and pin 3 = cold or negative (-).
1/4" PHONO INPUT JACKS: 1/4" PHONO INPUT JACKS accept a balanced as well as an unbalanced line. The unbalanced line uses a standard tip-sleeve connection. The tip is positive and the sleeve is negative/ground. The balanced line uses a tip-ring-sleeve connection. Tip = hot or positive (+), ring = cold or negative (-), and sleeve = shield/ground.
1/4" PHONO INPUT JACKS: 1/4" PHONO INPUT JACKS accept a balanced as well as an unbalanced line. The unbalanced line uses a standard tip-sleeve connection. The tip is positive and the sleeve is negative/ground. The balanced line uses a tip-ring-sleeve connection. Tip = hot or positive (+), ring = cold or negative (-), and sleeve = shield/ground.
