Infinity Prelude MTS Center User manual
Technical Manual
Prelude MTS Center
ACOUSTIC & ELECTRICAL SPECIFICATIONS:
• Nominal Impedance 4 ohms
• Max Amp Power 500 watts*
• Frequency Response 80 Hz - 22kHz (±3dB)
100 Hz - 20kHz (±1.5dB)
• Sensitivity 89 dB (1 watt @ 1 meter)
• Crossover Frequency 300 Hz, 2000 Hz
SYSTEM COMPONENTS:
• Enclosure Prelude MTS Center (Not for sale)
• Grille 335230-002
• Low Frequency (2) 5¹⁄₄”(133mm) C.M.M.D.
Transducer Neodymium Shielded (335337-001)
DC Resistance 5.0 ohms ±10%
• Mid Frequency Transducer 3¹⁄₂” (89mm) C.M.M.D. Neodymium
Shielded (335224-001)
DC Resistance 4.6 ohms ±10%
• High Frequency 1” (25mm) C.M.M.D. Neodymium
Transducer Shielded (335225-001)
DC Resistance 3.4 ohms ±10%
• Crossover Network 335241-001
AURAL SWEEP TEST SPECIFICATIONS:
• A. System Aural Sweep Test 6.0V Input 80 Hz to 22 kHz
• B. L.F. Aural Sweep Test 6.0V Input 80 Hz to 500 kHz
• C. M.F. Aural Sweep Test 4.0V Input 100 Hz to 3 kHz
• D. H.F. Aural Sweep Test 2.83V Input 2 kHz to 22 kHz
PHYSICAL SPECIFICATIONS:
• Enclosure dimensions: 6¹⁄₂” x 23” x 7⁵⁄₈” (H x W x D)
165mm x 584mm x 194mm
• Weight 21¹⁄₄ lbs. /9.64kg
WARRANTY:
• Refer to Warranty Statement packed with each product.
* The maximum recommended amplifier power rating will ensure proper system
headroom to allow for occasional peaks. We do not recommend sustained
operation at these maximum power levels.
Owner's Manual
335060-003
Stand Owner's Manual
332146-004
Warranty Card
335841-001
Survey Card
335868-002
OWNER'S
MANUAL
Upper Foam
335857-001
Bump-on Feet Set
330104-001
Lower Foam
335858-001
Fiber Cloth
(2pcs.)
Outer Carton
335237-001
Stand
335844-001
Grille
335230-002
PACKAGING
11/01
Infinity Systems, Inc. 250 Crossways Park Dr., Woodbury, New York 11797
Prelude MTS Center
Driver
High Frequency
335225-001
Driver
Mid.Frequency
335224-001
Drivers (2)
Low Frequency
335337-001
Yellow/
Black
White/
Black
Green/
Black
Green/
Black
Green
Green
White
Yellow
Crossover Networks
335241-001
– +
Binding Post
(Red)
335358-002
Binding Post
(Black)
335358-001
L.F.
M.F.
+
H.F.
250 +
250
+
+
250
205
–
205
–
205 –
205
–
110
12" GREEN
WHITE
WHITE/BLK
18" YELLOW
18' YELLOW/BLK
18" GREEN
12" GREEN/BLK
18" GREEN/BLK
+IN
–IN
INPUT
RED
BLACK
BLACK
C3
1000µF
100V
C3
150µF
100V
C2
10.0µF
100V
R5
Jumper
w/18AWG
bus Wire
C4
1.0µF,100V
C1
47µF
100V L1
4.70mH
C6
8.0µF, 100V
C5
3.0µF
100V
C7
10.0µF
100V
L5
1.20
mH
L4
0.27
mH
C1
270µF
100V
C2
100µF
100V
C4
18µF
100V
L4
0.073mH
L1
3.30mH
L2
.90mH
L2
2.20mH
L3
4.7
mH
L3
3.90
mH
R2
5.60ohm
25W
R1
4.00 ohm
25W
R1
2.70ohm
25W
R4
5.60ohm
10W
R3
1.60ohm, 26W
R2
2.70ohm
25W
Prelude MTS Center Schematic
WIRING DIAGRAM
Screws (8)
#8-32 x ¹⁄₂"
FPH BLK
901901-008
Screws (8)
#8-32 x ¹⁄₂"
PPH BLK
900201-008
Screws (4)
#4-40 x ¹⁄₂" PPH BLK
905501-008
Screws (2)
#10-32 x .875"
PPH BLK
900401-014
Screws (4)
#6-32 x 1.5"
PPH BLK
900301-024
Woofers (2)
335337-001
Front Baffle
Gasket
335356 -002
Tweeter
335225-001
End Cap (2)
335044-001
End Cap
Gasket (2)
335354-001
Network (2)
335241-001
Network (2)
335241-001
Grille
335230-002
Binding Post
(Red)
335358-002
Prelude Center
(Not for Sale)
Binding Post
(Black)
335358-001
Screws (4)
#8-32 x ¹⁄₂" PPH BLK
900201-008
Screws (8)
#¹⁄₄ -20 x 1.5" PPH BLK
908701-024
Screws (4)
#8-18 x ¹⁄₂"
FPH BLK
908801-008
Mid-Range
335224-001 Mid-Range
Cup Gasket
335705-001
Mid-Range
Cup
335226-002
Grille retainer (8)
333249-003
Front Baffle
335236-001
Stand
335844-001
Knock-out
Seal (4)
330068-001
Terminal Cup
335369-001
Prelude MTS Center
11/01
Infinity Systems, Inc. 250 Crossways Park Dr., Woodbury, New York 11797
EXPLODED VIEW
Prelude MTS Center
To Service the Prelude MTS Center
1) Lay the loudspeaker down on a padded, level surface; remove
the grille.
2) Extract all (8) rubber grille retainers; this can be accomplished by
carefully pulling them out of their cavities with long-nosed pliers or
similar tool.
3) Remove the (8) Phillips screws that are now exposed.
4) Carefully lift the fully loaded baffle off the cabinet.
5) To service the binding posts or terminal cup, remove the (4) Phillips
screws that hold the cup to the rear cabinet. NOTE: Removal of this
cup alone only allows access to the binding posts or terminal cup.
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