Infinity FIFTEEN User Manual

Cascade Series

Model Fifteen Subwoofer

SERVICE MANUAL

Infinity Systems, Inc.

250 Crossways Park Dr.

Woodbury, New York 11797

Rev 1 3/06

- CONTENTS -

BASIC SPECI FICATIONS ………………………………….………..1 EXPLODED VIEW/PACKAGING PARTS LIST…………………….…2 DETAILED SPECIF ICATIONS………………………………………….3 CONTROLS AND CONNECTIONS………………………………..…..6 OPERATION….…………………………………………………………..7

TEST SET UP AND PROCEDURE............................................……8

BLOCK DIAGRAM………………………………………….……..…..…9 ELECTRICAL PARTS LIST (120v) …………….………………….….10 PCB DRAWINGS……………….………………….……………………17 SEMICONDUCTOR PINOUTS………………….……..……….……..20

SCHEMATICS (120v)……………………………....………..………...21

Basic Specifications Cascade Model Fifteen Po wered Subwoofer

Frequency Response 32Hz – 150Hz (–3dB)

29Hz – 150Hz (–6dB) Maximum Amplifier Output 800 Watts RMS (20Hz – 150Hz with no more than 0.1% THD) Crossover Frequency 50Hz – 150Hz, 24dB/octave, continuously variable

(Normal/LFE switch set to “Normal”) Drivers Fo ur 6" x 6" (152mm x 152mm) Dimensions (H x W x D) 13" x 37" x 8-1/2"

(330mm x 940mm x 216mm) Weight 98 lb (44.5kg)

Infinity continually strives to update and improve existing products, as well as create new ones. The specifications and construction details in this and related Infinity publications are therefore subject to change without notic e.

Model Fifteen Cascade

MODEL FIFTEEN EXPLODED/PACKING VIEW

Item Description Part Number Qt

1 RABOS kit QT0180003010 1 (kit) 2 Packing Foam 806000016530 1 (set) 3 6" x 6" Woofer 510165 11601 4 4 Transformer 120V BY0152001010 1

Transformer 230V BY0152001020 1 5 Rubber feet TT0035001012 4 6 Cabinet Cherry/Black/Silver Not For Sale 1 7 Amplifier 120V/230V Not For Sale 1 8 Control panel Not For Sale 1 9 Spike Foot Kit (Spike Feet) TT0012007010 4

Spike Foot Kit (Nuts) JG589932 4

Spike Foot Kit (Wrench) QT0068002010 1

10 Owner's manual 819001082002 1

Warranty card 819001082005 1

11 Outer Carton (Cherry) 805001016506 1

Outer Carton (Black) 805001016507 1

Outer Carton (Silver) 805001016508 1

12 Access Door Not For Sale 1 13 Infinity Logo MP0043001000 1

Model Fifteen Cascade

Cascade Model Fifteen Subwoofer 800W Powered Sub/ Plate Amp

LINE VOLTAGE Yes/No Hi/Lo Line Nom. Unit Notes

Parameter Specification Unit Amp Section Type (Class AB, D, other) D --- Load Impedance (speaker) 4 Ohms Rated Output Power 800 Watts THD@ Rated Power 1% THD @ 1 Watt 0.5 % DC Offset mV-DC < 20 Damping factor 20 N/A > 15 measured at 50 Hz

Input Sensitivity

Signal to Noise SNR-A-Weighted 100 dBA SNR-unweighted 70 dBr SNR rel. 1W-unweighted 60 dBr

Residual Noise Floor 3 mVrms

Residual Noise Floor 3

Input Impedance

Active Filters Low Pass (fixed or variable) Variable --

Subsonic filter (HPF) fixed --

Friend Circuit FIXED --

US 120vac/60Hz Yes 108-132 120

QA Test

Limits Conditions Notes

Line Input 370 mV mVrms

mVrms(max)

Line Input 10 k ohms

Frequency 50 - 150 Hz. Hz

Slope 24 dB/Octave

Q Butterworth --

Frequency 33 Hz

Slope 12 dB/Octave

Q 2.5 --

Frequency 80 Hz Hz

Dip -4 dB

Q 1 --

Vrms

Nominal Regulated 120 V line 22k filter, 50Hz 22k filter, 50Hz @ Speaker Outputs

900 W @ 50Hz

relative to rated power relative to rated power relative to 1W Output Volume @max, using RMS reading DMM/VOM (or A/P) Volume @max, w/ A/P Swept Bandpass Measurement (Line freq.+ harmonics)

Nominal

notch filter

Normal Operation

Z-curve required 5% tolerance applies 800W +/- 5%

1 input driven

A-Weighting filter 22k filter 22k filter

Special filter RABOS --

Switches Main Power ON/OFF YES --

Type rocker --

Rabos ON/OFF YES --

Type mini toggle --

Polarity Switch YES --

Type mini toggle --

Limiter (yes/no) YES compressor and limiter THD at Max. Output Power less than 10 %

Output Volume Control Volume Control Pot YES --

Taper (lin/log) log A taper --

@ minimum setting no output

Input/Output Configuration Line In (L,C,R,AC3,Mono) Stereo -- LFE In YES -- Line Outputs (L,C,R) YES -- Hi Level Out YES --

Signal Sensing (ATO) Auto-Turn-On (yes/no) YES -- ATO Input Test Frequency 100 Hz ATO Input Threshold 2 mV typ. LPF "On", BOS "Off" ATO Low Pass cutoff 400 Hz 450

ATO Turn-on time 1ms 10 Auto Mute / Turn-OFF Time 10 minutes 5 < t < 15

parameteric EQ, variable f, Q and notch depth.

Located on amp plate

Located on amp plate "Off": 0°; "On": 180° Located on amp plate

Maximum Output Power

mounted on amp panel

RCA phono jack, gold plated Shared with "R" Line In jack

ATO-LPF for noise immunity Amp connected and AC on, then input signal applied ( 1 W output ) Time before muting, after signal is removed

TV-5

Max THD as a result of limiting.

LPF "On", BOS "Off"

Model Fifteen Cascade

Power on Features Power on Delay time greater than 2 sec. Power on LED YES --

Normal On/Off green / red color

ATO -- color

AC Power Applied Bi-color LED located on front of cabinet ATO mode only "Active": green; "Standby": red

Transients/Pops ATO Transient 5 mV-peak Turn-on Transient 30 mV-peak Turn-off Transient 30 mV-peak

Efficiency Stand-by Input Power 13 Watts AC Power Cons.@1W 22 Watts Power Cons.@rated power 1080 Watts Efficiency 74 %

Protection Short Circuit Protection YES -- Thermal Protection YES -- DC Offset Protection YES -- Line Fuse Rating ( 120 V ) 6.3 Amps

@ Speaker Output @ Speaker Output @ Speaker Output

typ. @ nom. line voltage typ. @ nom. line voltage typ. @ nom. line voltage typ. @ nom. line voltage

Direct short at output threshold ~ 65 deg. C at panel DC present at Speaker Out leads Type ADL or MDL

AC Line cycled from OFF to ON AC Line cycled from ON to OFF

Measured is Watts, not VA

Relay for driver/fire protection

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Model Fifteen Cascade

CONTROLS AND CONNECTIONS

Rear Panel

Line-Level Inputs

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Line-Level Outputs

Power Indicator

Subwoofer Level (Volume) Control

∞

Crossover Adjustment

Phase Switch

Normal/LFE Selector

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Power Switch

Bass Optimization Controls (see page 5)

R.A.B.O.S.Selector

‚

Center-Frequency Adjustment

⁄

Bass Optimization System Level Adjustment

Bass Optimization System Bandwidth Adjustment

CASCADE MODEL FIFTEEN

SUBWOOFER OR LFE OUTPUT

Model Fifteen Cascade

CONNECTIONS

If you have a Dolby®Digital or DTS®receiver/processor with a low-frequency-effects (LFE) output:

• Set Normal/LFE Switch to LFE.

NOTE: In this case, you do not need to use a Y-connector. Simply connect the LFE output on your receiver/processor to either the left or right input on the subwoofer.

If your receiver/processor has subwoofer outputs for the left and right channels:

• Set Normal/LFE Switch to Normal.

NOTE: Some receivers have a single subwoofer output (do not confuse this with a single LFE output as described to the left). In that case, it is recommended that you use a Y-connector (not included) to maximize performance.

The Cascade Model Fifteen also includes a set of line outputs.These outputs allow you to “daisy-chain” one Model Fifteen to multiple Model Fifteen subwoofers. Simply connect the first subwoofer as described above and then run a subwoofer cable from the line output(s) to the line input(s) on the next sub.

NOTE: This line output is before the R.A.B.O.S. circuit. Each subwoofer’s R.A.B.O.S.controls must be individually adjusted during the R.A.B.O.S.setup.

CASCADE MODEL FIFTEEN

Model Fifteen Cascade

OPERATION

Power On

Plug your subwoofer’s AC cord into a wall outlet.Do not use the outlets on the back of the receiver.

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to the

on the

Initially set the Subwoofer Level (Volume) Control “min”position.

Turn on your sub by pressing the Power Switch rear panel.

Auto On/Standby

With the Power Switch •in the ON position, the Power Indicator LED £will remain backlit in red or green to indicate the On/Standby mode of the subwoofer.

RED = STANDBY (No signal detected,Amp Off) GREEN = ON (Signal detected,Amp On)

The subwoofer will automatically enter the Standby mode after approximately 10 minutes when no signal is detected from your system.The subwoofer will then power ON instantly when a signal is detected. During periods of normal use, the Power

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Switch for extended periods of nonoperation,e.g., when you are away on vacation.

can be left on.You may turn off the Power Switch

Adjust Level

Turn on your entire audio system and start a CD or movie soundtrack at a moderate level.Turn up the Subwoofer Level

(Volume) Control the subwoofer,check the AC-line cord and input cables. Are the connectors on the cables making proper contact? Is the AC

plug connected to a “live”receptacle? Has the Power Switch been pressed to the ON position? Once you have confirmed that the subwoofer is active,proceed by playing a CD,record or cassette. Use a selection that has ample bass information.

about halfway.If no sound emanates from

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Crossover Adjustments

NOTE: This control will have no effect if the Normal/LFE Selector

¶ is set to “LFE.”If you have a Dolby Digital or DTS

Switch processor/receiver, the Crossover Frequency is set by the processor/receiver. Consult your owner’s manual to learn how to view or change this setting.

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The Crossover Adjustment Control frequency at which the subwoofer reproduces sounds.If your main speakers can comfortably reproduce some low-frequency sounds, set this control to a lower frequency setting,between 50Hz and 100Hz.This will concentrate the subwoofer’s efforts on the ultradeep bass sounds required by today’s films and music. If you are using smaller bookshelf speakers that do not extend to the lower bass frequencies,set the Crossover Adjustment Control to a higher setting, between 120Hz and 150Hz.

determines the highest

Phase Control

The Phase Switch § determines whether the subwoofer speaker’s pistonlike action moves in and out with the main speakers (0˚) or opposite the main speakers (180˚). Proper phase adjustment depends on several variables such as room size,subwoofer placement and listener position.Adjust the Phase Switch to maximize bass output at the listening position.

Set the overall volume control of the preamplifier or stereo to a comfortable level. Adjust the Subwoofer Level (Volume) Control

until you obtain a pleasing blend of bass.Bass response should not overpower the room but rather be adjusted so there is a harmonious blend across the entire musical range. Many users have a tendency to set the subwoofer volume too loud, adhering to the belief that a subwoofer is there to produce lots of bass.This is not entirely true.A subwoofer is there to enhance bass, extending the response of the entire system so the bass can be felt as well as heard.However, overall balance must be maintained or the music will not sound natural.An experienced listener will set the volume of the subwoofer so its impact on bass response is always there but never obtrusive.

CASCADE MODEL FIFTEEN

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