FCV220 / FCV440 POWER AMPLIFIERS

Product Description

Designed with the sound contractor in mind, Crest Audios Models FCV220 and FCV440 are high-quality amplifiers intended for fixed installations using constant-voltage distributed lines. These cost-effective two rack-space amplifiers make excellent sonic quality and long-term reliability available to even the most price- conscious installations. The FCV Series amplifiers use the same high-grade components employed in the Crest Audio Professional Series amplifiers and are fan-cooled. An internal mid-chassis fan draws cooling air from the front of the amplifier and exhausts it out the sides. High quality, fully-isolated output transformers are used, providing maximum amplifier protection and freedom from output-related ground loops. Either transformer can be bypassed for driving a speaker directly. The FCV Series amplifiers are fully compatible in design with other Crest Audio amplifiers, Octal Socket Accessories and the NexSys computer-controlled audio system. The FCV chassis is made of heavy 12-gauge steel for rigidity. Attenuator controls, barrier strip outputs, Octal Sockets, and actively balanced inputs are located on the rear panel. Front panel features include Clip and Status LED indicators and a combined circuit breaker/AC power switch. As always, Crest Audio performance and reliability come standard.
Crest Audio FCV Series Amplifiers are fully compatible with the NexSys Computer-Controlled Audio system.

Power Specifications

High Impedance Stereo 4 Stereo

Model FCV220

60 Hz - 18 kHz* <0.1% THD 1 kHz, <0.05% THD

Model FCV440

110 Watts

120 Watts

220 Watts

240 Watts

*+0, -3dB Constant voltage line; depends on amplifier configuration
F C V 0 / F C V 0 P OW E R A M P L I F I E R S
S P E C I F I C AT I O N S

FCV220

Frequency Response THD SMPTE IMD Slew Rate Damping Factor Input CMRR Voltage Gain (direct out) Input Sensitivity Input Impedance Hum and Noise (A Weighted) Cross Talk Connectors (per channel) Power Supply Max Current Draw Cooling Controls LED Indicators (per channel) Protection Construction Dimensions (H x W x L) Gross Weight Net Weight Warranty 60 Hz-18 kHz; +0, -.3dB (110W) <0.025% @ 110W into 4, 1kHz <0.015% @ 110W into 4, 60 Hz & 7kHz 14V / s, input filter bypassed 250:1, 1kHz @ 8, direct out >90 dB X27 standard, others upon request.775V RMS for rated power @ 8, or into constant-voltage line 20k, actively balanced >103.7 dB >80 dB Input/Output Barrier Strips, Octal Socket 540 VA power transformer, 20,000 f filter capacitance 7.5A/4.0A (120VAC/240VAC) Variable-speed DC fan Front panel circuit breaker/power switch, 2 rear-panel attenuators, signal ground lift jumper. Clip, bi-color Active/Protect High Temp, DC, turn-on/off transient, short-circuit, subsonic 12 gauge single box steel chassis 3.5"x19"x14" (15 to rear mounting ears) 89mm x 483mm x 356mm (381mm to rear mounting ears) 42.0 lbs (19.06 kg) 37.6 lbs (17.07 kg) 3 years, parts and labor

FCV440

60 Hz-18 kHz; +0, -.3dB (220W) <0.025% @ 220W into 4, 1kHz <0.015% @ 220W into 4, 60 Hz & 7kHz 14V / s, input filter bypassed 250:1, 1kHz @ 8, direct out >90 dB X38.3 standard, others upon request.775V RMS for rated power @ 8, or into constant-voltage line 20k, actively balanced >103.7 dB >80 dB Input/Output Barrier Strips, Octal Socket 540 VA power transformer, 20,000 f filter capacitance 10.0A/5.0A (120VAC/240VAC) Variable-speed DC fan Front panel circuit breaker/power switch, 2 rear-panel attenuators, signal ground lift jumper. Clip, bi-color Active/Protect High Temp, DC, turn-on/off transient, short-circuit, subsonic 12 gauge single box steel chassis 3.5"x19"x14" (15" to rear mounting ears) 89mm x 483mm x 356mm (381mm to rear mounting ears) 50.0 lbs (22.70 kg) 45.5 lbs (20.65 kg) 3 years, parts and labor
The power amplifier shall have two channels. Each shall deliver a minimum of 110 watts into 4 Ohms or into a constant voltage line per channel, both channels driven, 60Hz - 18kHz. The amplifier shall be fan-cooled. It shall have circuitry to protect itself and the speaker load from output short circuits, DC voltage on outputs, and thermal overload. Output relays shall protect the speakers from any type of amp failure. The amplifier shall have a voltage gain of 27x, with an input sensitivity of 0.775 volt for rated power or into a constant-voltage line. The hum and noise level shall be greater than 103.7dB, A weighted, below the rated output. SMPTE IND at the direct output shall be less than 0.015% at rated power, 60Hz and 7kHz. The amplifier shall have a Class AB output stage, a transformer-coupled output for high-impedance distributed lines, and a combination power switch/magnetic circuit breaker. The amplifier shall also provide a means of bypassing the transformer for direct output to 8 Ohm or 4 Ohm speaker loads. The transformer outputs shall have a frequency response equal to or greater than 60Hz-18kHz, +0, -3dB, at rated power. The amplifier shall operate on 120, 230, or 240 volts, +5/-10%, 50 or 60Hz AC (configured at factory). Maximum current draw shall not exceed 7.5 amperes at 120VAC or 4 amperes at 240VAC (limited by front panel breaker for bench tests), both channels driven into a 4 ohm resistance. Front panel indicators shall include a Clip/Limit LED and a bi-color Active/Protect LED for each channel. The rear panel shall have an attenuator for each channel. The inputs shall be actively balanced, with rear-panel barrier strips. Octal accessory sockets and a signal/ground lift jumper will be provided. The amplifiers packaging shall allow for standard rack mounting without requiring space between similar units. Dimensions shall be 3.5" (8.89cm) high, 19" (48.26cm) wide, and 14" (35.56cm) deep. The FCV220 shall have a net weight of 42.0 lbs. (19.06kg). The amplifier shall be designated the Crest Audio Model FCV220.

Architects Specifications FCV220
The power amplifier shall have two channels. Each shall deliver a minimum of 220 watts into 4 Ohms or into a constant voltage line per channel, both channels driven, 60Hz - 18kHz. The amplifier shall be fan-cooled. It shall have circuitry to protect itself and the speaker load from output short circuits, DC voltage on outputs, and thermal overload. Output relays shall protect the speakers from any type of amp failure. The amplifier shall have a voltage gain of 38.3x, with an input sensitivity of 0.775 volt for rated power or into a constant-voltage line. The hum and noise level shall be greater than 103.7dB, A weighted, below the rated output. SMPTE IND at the direct output shall be less than 0.015% at rated power, 60Hz and 7kHz. The amplifier shall have a Class AB output stage, a transformercoupled output for high-impedance distributed lines, and a combination power switch/magnetic circuit breaker. The amplifier shall also provide a means of bypassing the transformer for direct output to 8 Ohm or 4 Ohm speaker loads. The transformer outputs shall have a frequency response equal to or greater than 60Hz18kHz, +0, -3dB, at rated power. The amplifier shall operate on 120, 230, or 240 volts, +5/-10%, 50 or 60Hz AC (configured at factory). Maximum current draw shall not exceed 10 amperes at 120VAC or 5 amperes at 240VAC (limited by front panel breaker for bench tests), both channels driven into a 4 ohm resistance. Front panel indicators shall include a Clip/Limit LED and a bi-color Active/Protect LED for each channel. The rear panel shall have an attenuator for each channel. The inputs shall be actively balanced, with rear-panel barrier strips. Octal accessory sockets and a signal/ground lift jumper will be provided. The amplifiers packaging shall allow for standard rack mounting without requiring space between similar units. Dimensions shall be 3.5" (8.89cm) high, 19" (48.26cm) wide, and 14" (35.56cm) deep. The FCV440 shall have a net weight of 45.5 lbs. (20.65kg). The amplifier shall be designated the Crest Audio Model FCV440.
Architects Specifications FCV440
Crest Audio reserves the right to make improvements in manufacturing or design which may affect specification. Crest Audio specification literature is available in downloadable PDF format; visit our website at: http://www.crestaudio.com. 1997 Crest Audio Inc.
Crest Audio Inc. 100 Eisenhower Dr., Paramus NJ 07652 USA TEL: 201.909.8700 FAX: 201.909.8744 http://www.crestaudio.com

v. 1.2 7/9/97 B5500003

*B5500003*

Schematic set FCV 220 & FCV 440 Series power amplifiers
1. Preamp driver 2. Preamp driver OTA 3. Power supply interconnects 4. Power supply and fan driver 5. Output stage 6. NexSys preamp driver 7. NexSys power supply 8. NexSys output stage
R7 Z1 1N5930 R10 R24 C1 0.1/100V R8 J3 CH A OCTAL 10K/1% D3 1N4148 R22 10K/1% D7 1N4148 R3 NOTE 1 R21 NOTE 2: C3 30pF R14 C2 0.1/100V BAR1 INPUT BARRIER Z3 1N5359 100/100V Z2 1N5930 VR1 5K R12 6.65K/1% R6 100K C15 100/100V C12 0.47/250V C16 0.1/100V C18 R20 4.7/1W RLY2 T90N5D12-12 D8 1N4148 D2 1N4148 C6 R26 10K/1% J4 CH B OCTAL R4 NOTE 1 R28 NOTE 2 R25 NOTE 2 30pF C21 330pF D4 1N4148 D6 1N+ IC1B NE5532 C4 30pF VR2 5K R1 90.9K/1% C7 0.1/100V R3,R4 NOTE 1: FCV440 = 13.75K/1% FCV220 = 15.1K/1% FCV440 = 27.18K/1% FCV220 = 19.6K/1% FCV440 = 680/10W FCV220 = 520/10W R5 100K C13 0.47/250V R11 6.65K/1% R29 NOTE 3 R30 NOTE 3 C9 15pF RIC2A STK3152 RC19 330pF RSUPPLY GND SUPPLY GND CH B MODULE 100K/1W/2% R19 4.7/1W C17 0.1/100V RLY1 T90N5D12-12 J2 RELAY CH B OUT

470 C24 150pF 10

2.7K/2W

D1 1N4148

NOTE 2

C22 330pF 30pF 15

+ C20 330pF 11

R27 SW1 MSSA2350 10K/1%

R21,R24,R25,R28

NOTE 2:

R29,R30

NOTE 3:

R7, R8 CHANGED FROM 4.7K TO 2.7K ON 4/8/92

D5 1N4148

1 IC1A NE5532

R2 90.9K/1% C8 0.1/100V

14 IC2B STK3152

J8 CH A MODULE CH A OUT

100 R8 2.7K/2W

CH A MODULE

C23 150pF

100K/1W/2%

J7 CH B MODULE
CREST AUDIO INC. 150 Florence Avenue Hawthorne, NJ 07506 Title PREAMP/DRIVER FCV220/FCV440 Size B Date:
Document Number 21B1241 Thursday, May 18, 2000

Rev Sheet 1

R10 R24 C8 J3 CH A OCTAL R22 10K/1% D7 1N4148 J1 CH A BAR6 INPUT BARRIER
470 C24 150pF 8 J8 CH A MODULE CH A OUT

+24V C22 330pF

0.1/100V
D1 1N4148 R23 10K/1% D3 1N4148 D5 1N4148 8

C5 +24V

30pF R6 C30 CP 1 220pF 220K C2
IC2A OPA2604 R2 C12 90.9K/1% C8 0.1/100V 1/63V R44 3.3K R45 6.8K C14

14 IC4B STK3152

IC1A OPA2604 JP1 C31

R12 6.65K/1% Z1

R14 100K/1W/2% R19 4.7/1W T90N5D12-24 J9 JP? 3 HEADER 3 26-48-1036 0.1/100V C18 R20 4.7/1W RRLY2 T90N5D12-24 C23 150pF C19 330pF RRLY1

R3 NOTE 1

R21 NOTE 2:
C3 30pF CP C2 0.1/100V -24V

VR1 5K

R34 3.3K 10/16V/BP +24V R7 R100/100V R9 200/1W

1N5353 C15 R39 10K

C17 0.1/100V

R42 47K Z2 C16 100/100V

CH B OUT
ANALOG ANALOG ATTENUATE CH ATTENUATE CH
GND GND A B +15 V DATA CH A DATA CH B +24V -24V DIGITAL GND DIGITAL GND
D2 1N4148 C6 +24V R26 10K/1% D4 1N4148 -24V R27 SW1 MSSA2350 10K/1% R28 NOTE 2 C4 30pF D8 1N4148 D6 1N4148 R25 NOTE 5 30pF
750 R38 6.8K R37 1.5K CIC1B OPA2604 VR2 5K JP2 220pF R5 220K
IC3 NE5517AN R40 10K R43 47K 7 8

1N5353 R8 200/1W

CH B MODULE

SUPPLY GND SUPPLY GND

-24V + 7 IC2B OPA2604 R41 1.5K

J6 26-48-1116

C21 330pF IC4A STK3152

J4 CH B OCTAL

R4 NOTE 1
+24V -24V 90.9K/1% R1 C9 15pF R46 4.7K R? 27 OC1 4N25 CH B ATTN R? 27 OC2 4N25 CH A ATTN R32 100K C25 4.7/35V R47 4.7K R33 100K C26 4.7/35V C7 0.1/100V R11 6.65K/1%

J2 CH B

C13 1/63V -24V

C11 10/16V/BP

NOTE 1:
FCV440 = 13.75K/1% FCV220 = 15.1K/1%
NOTE 2: FCV440 = 27.18K/1% FCV220 = 19.6K/1%
CREST AUDIO INC. 100 Eisenhower Drive Paramus, NJ 07652 Title OTA PREAMP/DRIVER FOR FCV SERIES Size C Date:
Document Number 21C1383 Thursday, May 18, 2000 Sheet

Rev of 1

OUTPUT 'A'

PREAMP

OUTPUT 'B'

26-03-4071 J10 11

26-03-4020 JJ2B

26-03-4111

J4 26-03-4030 J2 1

POWER SUPPLY

CREST AUDIO 100 EISENHOWER DRIVE PARAMUS, NJ 07652 Size A Date:
Document Number 26A1816 Thursday, May 18, 2000

Rev 01 Sheet 0 of

R25 100/2W IC2 LM317
J26-48-1055 TEMP SENSOR POWER TEMP SENSOR OUTPUT GROUND A CLIPSPKR LEVEL A (DC PROT)
2 Z3 1N5355A C17 10/50V 1
J4 R1 26-48-1025 R43 1K J1 22-02-2085 CH. A Z1 R21 2.2K J26-48-1055 R44 1K J5 TEMP SENSOR POWER TEMP SENSOR OUTPUT GROUND B CLIPSPKR LEVEL B (DC PROT) A CLIPGROUND A CH. PROTECT+ B CLIPGROUND B CH. PROTECT+ RELAY B RELAY A

Q5 MPSA13

D8 1N4148

442/1%

IC1B LM+ 5 6

R28 1K

R29 1K
IC1A LMD6 1N4148 CH. A R27 100K D7 1N4004 R34 2.2K

R32 23.7K/1%

R30 1K/1%

R31 1K/1%

R33 23.7K/1%

R22 2.2K

R41 1.5K
R39 1.5K R1 10K CH. B D1 R35 2.2K 2N12 IC1E LMR13 330K C18 100/25V R17 22K C14 470/25V R9 10K R7 1K/1% R8 1K/1% R10 10K 8 R14 MAC97 330K C15 470/25V R18 22K TR2 C19 100/25V Z4 1N5920 SEE CHART D4 1N4148 Q1 R15 10K 10 IC1C LM614 1N4148 R11 1K R5 499/1% 9 R6 499/1% R12 1K R4 2.2K CH. A D2 1N4148 Q14 2N+ IC1D LM614 R16 10K R36 2.2K R2 10K R40 1.5K R42 1.5K 26-48-1025

FAN DRIVE V+ GROUND

R37 47/1W

2N5401 Q3

Q4 2N5401

R38 47/1W

R23 SEE CHART D3 1N4148 Z5 1N5920

TR1 MAC97

SEE CHART

P1 PLUG AC MALE

T1 SEE CHART 3A/MINI BR2 RS202
0.15/400V C1 TO C2+ BR1 BR354W GND TO C2-/C3+ TO C2-/C3+ GND (SEE CHART)

TO C3-

F1 C11 1000/25V

FCV220

FCV440

R23,R24 C2,C3 SW1 T1

1.8K/5W 15,000UF/50V 4.00 AMP CREST #22B1297
3.9K/5W 10,000UF/75V 6.00 AMP CREST #22BFlorence Ave. Hawthorne, NJ 07506 Title FCV220/FCV440 POWER SUPPLY/FAN DRIVER PCB Size C Date: Document Number 21C1230 Thursday, May 18, 2000 Sheet

CREST AUDIO INC.

D1 Z1 1N4735A

1N4004

R46 10K
R1 NOT USED RC9 10n/50V R34 Q1 2N5551 15K Q4 2SC2336 R8 10/1W C2 0.1/100V R12 2.2/1W R42 2.2/1W R19 2.2/1W R38 100K Q6 2SC3281 Q8 2SC3281 Q20 2SC3281 2SC3281 Q10 R30 100K R36 274/1% Q18 2N5551 R40 100/1% R32 100K D7 1N4004 L1 R100 Q3 TIP110 R7 100/1W R11 150/1W R14 51/2W R16 4.7/2W R18 0.33/5W R44 0.33/5W R22 0.33/5W R37 R13 2.2/1W R9 10/1W D4 1N4148 Q5 2SA1006 Q7 2SA1302 R45 2.2/1W Q9 2SA1302 R20 2.2/1W Q21 2SA1302 Q11 2SA1302 R39 100K R35 15K 10n/50V C8 R4 Q17 2N5551 -65VNL R24 15K 274/1% R23 100K Q19 2N5401 2N5551 Q13 Q12 2N5551 D6 FR204 C5 0.047/630V GROUND R41 100/1% R25 100K D8 1N4004 2uH OUT 1/2W R28 2.2/2W Q14 2N5401 Q15 2N5401 +65VNL 2N5401 Q16 R31 15K C3 0.1/100V

R47 Z2 1N4749A 20K C7 1n/50V

D3 1N4148

C1 100/6.3V D9 1N4148

D5 FR204

+ 65 VNL + DRIVE + DRIVE SPEAKER RAIL SPEAKER RAIL - DRIVE - DRIVE - 65 VNL

J1 INPUT

R10 150/1W R5 1.2K

R15 4.7/2W

R17 0.33/5W

R43 0.33/5W

R21 0.33/5W

R6 390

D10 1N4148

VR1 PTC15LB/250

R26 220
Q2 2N5401 1n/50V Z3 1N4749A C6 R48 20K R49 Z4 1N4735A D2 10K R2 NOT USED NOTE 1 1N4004 FCV220 = OMIT Q20,Q21 FCV220 = OMIT R42,43,44,45

C4 0.1/100V

TEMP SENSOR POWER TEMP SENSOR OUTPUT TEMP SENSOR GROUND CLIP (-) SPEAKER RAIL

5 CLIP/TEMP

IC2 LM35DP
CREST AUDIO INC. 150 Florence Ave. Hawthorne, NJ 07506 Title FCV220/FCV440 OUTPUT STAGE Size B Date: Document Number 21B1294 (REF. PCB # 26B1100) Thursday, May 18, 2000
R24 NOTE 1 D1 1N4148 C22 330pF

RC24 150pF 10

C1 10/35V/T
-RET A GND A DATA +24V +15V +RET +IN -IN
R23 19.6K/0.1% D3 1N4148 R22 19.6K/0.1% D7 1N4148 R21 NOTE 1 C3 30pF D5 1N4148

30pF 15

C20 330pF

1 IC1A OPA2604

0C1 RJ8 CH A MODULE CH A OUT
J3 CH A OCTAL A A A B B B GND -IN +IN +IN -IN GND
100 VTL5C6 R14 100K/1/2W/1% R19 RLY1 T90N5D12-12 J9 CH A CH B RRELAY CH B OUT

BAR1 IN BARRIER 10/35V/T

D12 1N4004

R12 6.65K/1%

4.7/1W C15 100/100V C17 0.1/100V

R8 NOTE 1

R6 100K

D11 1N4004

C12 NOTE 1

C14 10/16V/BP

C16 100/100V
0.1/100V C18 R20 4.7/1W RLY2 T90N5D12-12

J11 26-48-1075

A GND A GND A OPTO B OPTO +15V DATA A DATA B +24V -24V D GND D GND SW1 MSSA2350
SUPPLY GND RD8 1N4148 D2 1N4148 C6 R26 19.6K/0.1% D4 1N4148 R25 NOTE 30pF C21 330pF C23 150pF RC19 330pF SUPPLY GND
R27 -RET D GND B DATA -24V +15V +RET +IN -IN 19.6K/0.1%

D6 1N4148

7 + IC1B OPA2604 5

R28 NOTE 1

C4 30pF R1 VR2 5K 90.9K/1% C7 0.1/100V
REFERENCE DES R21,R24,R25,R28
FCV220 38.3K/0.1% 30pF 2.2/1W 0.47UF/250V

FCV440 53.6K/0.1% 30pF

C3,C4,C5,C6 R8 C12,C13
2.2/1W 0.47UF/250V 100 EISENHOWER DR. PARAMUS, NJ 07652 Title PREAMP/DRIVER FOR NEXSYS COMPATIBLE FCV Size B Date: Document Number 21B1703 Thursday, May 18, 2000

R5 100K

2 IC2A STK3152

8 J7 CH B MODULE

VTL5C6 C9 15pF R11 6.65K/1% RR13 100K/1/2W/1%

C13 NOTE 1

Rev 02 Sheet 1

J7 26-48-4

R52 100R
R17 2K2 TEMP SENSOR POWER TEMP SENSOR OUTPUT TEMP SENSOR GND CLIP A IGM A SPKR LEVEL A ANALOG GND

D17, D18 ARE R43, R44 ON 7/29/93 SILKSCREEN

CREST #22B1295

CREST AUDIO 100 EISENHOWER DRIVE PARAMUS, NJ 07652 Title FCVNXS.PWR Size C Date:
Document Number 21C1666 Thursday, May 18, 2000 Sheet

Rev of 0

R1 NOT USED D1 1N4004

RR46 7.5K R47 10K

Z1 1N4742A
+65VNL Z2 1N4749A Q4 2SC2336 Q6 2SC3281 C3 0.1/100V Q8 2SC3281 Q10 2SC3281 R19 2.2/1W R51 2.2/1W Q20 2SC3281
C1 100/6.3V C9 C2 0.1/100V D9 1N4148 10n/50V

R8 10/1W

Q1 2N5551

R12 2.2/1W

R5 + 65 VNL + DRIVE + DRIVE SPEAKER RAIL SPEAKER RAIL - DRIVE - DRIVE - 65 VNL J1 INPUT RPTC15LB/250 VR1 1.2K

R55 1.2K

R10 150/1W

R52 0.33/5W

R21 0.33/5W L1 R100 2uH OUT 1/2W R54 2.2/2W

Q3 TIP 110 D10 1N4148

R56 1.2K
R7 100/1W Q2 2N5401 C8 10n/50V D4 1N4148

R11 150/1W

R14 51/2W

R16 4.7/2W

R18 0.33/5W

R53 0.33/5W

R22 0.33/5W
R13 2.2/1W R9 10/1W Q7 2SA1302 Q9 2SA1302

R20 2.2/1W

R50 2.2/1W Q11 2SA1302 Q21 2SA1302

D6 FR204

C5 0.047/630V GROUND
Z4 1N4742A D2 1N4004 R49 7.5K R2 NOT USED

Z3 1N4749A

Q5 2SA1006

-65VNL R48 10K R4 470

-16V 12
R30 33.2K/0.5W R38 33.2K/0.5W + HIGH RAIL
10K R27 3.32K R31 33.2K/0.5W -16V 33.2K/0.5W R35 2.87K R39 Z5 1N5930 - HIGH RAIL EMITTER PNP
TEMP SENSOR POWER TEMP SENSOR OUTPUT TEMP SENSOR GROUND CLIP IGM SPEAKER RAIL GND
R23 1K 14 IC1C LM339N CLIP DETECTOR +

CLIP/TEMP

1 IC1B LM339N 7 +
R25 10K R44 750K/1% R29 3.74K

13 IC1D LM339N 11 +

CURRENT LIMITER

+ 10 -

2 IC1A LM339N

R26 3.32K

R34 2.87K

R42 2.4K/2W

R45 750K/1% 6 R32 33.2K/0.5W R40 33.2K/0.5W R28 3.74K D11 1N4148 R36 3.83K EMITTER NPN OUTPUT

D12 1N4148

R37 3.83K R41 R33 33.2K/0.5W
Z6 1N5930 R43 1.5K/5W FCV220 = OMIT Q20, Q21, 3/28/94 R50,R51,R52,R53
CHANGED 33.2K/1W TO 33.2K/0.5W

33.2K/0.5W -16V

5-4-94 CHANGED C6,C7 FROM.001UF/50V TO R55,R56 AT 1.2K.
CREST AUDIO INC. 100 EISENHOWER DR. PARAMUS, NJ Title FCV220/FCV440 NEXSYS OUTPUT STAGE Size C Date:
Document Number Thursday, May 18, 2000 Sheet

Rev 1 of 1