Carvin HT150 User Manual

HT Series Chassis, Cables & Hardware REFDESCRIPTION PART # QTY
1 Fuse Holder 23-81116 1
Line Fuse Value
120 VAC 2A, 250V, Slow Blow, 3AG 15-01512 1
230 VAC 1A, 250V, Slow Blow, 3AG 15-01524 1 2 Binding Post, Dual, Black/Red, Long 03-10450 2 3 Circuit Board Assembly (Includes all PCB’s) 80-01528 1 4 Unichassis 10-01509 1 5 Bracket, Tiedown, IC 10-63008 2 6 Front Panel 10-01501 1 7 Switch, Power 25-31350 1 8 Knob, Power Amp 07-09001 2 9 Mount, Toroid Cap 10-15004 1
Insulator, Toroid Pad (Not shown) 03-15010 2 10 Transformer, Power, Toroid See Chart 1 11 Cover, Chassis (Not shown) 10-06005 1 12 Foot, .875x.3125 (Not shown) 03-19682 4 13 Power Cord, AC, 16AWG (Not shown) 05-01604 1
Parts List For HT150 PCB Sub Assemblies
REF DESCRIPTION PART #
A1 Op-amp, Low noise 60-45580 A2 Op-amp, Low noise 60-45580 C1 Capacitor, Electrolytic, 4700µF, 50V 42-47251 C2 Capacitor, Electrolytic, 4700µF, 50V 42-47251 C3 Capacitor, Electrolytic, 470µF, 25V 47-47125 C4 Capacitor, Electrolytic, 470µF, 25V 47-47125 C5 Capacitor, Electrolytic, 10µF, 50V 47-10051 C6 Capacitor, Electrolytic, 10µF, 50V 47-10051 C7 Capacitor, Electrolytic, 10µF, 50V 47-10051 C8 Capacitor, Mylar, .047µF, 250V 41-47322 C100 Capacitor, Ceramic, 56pF 45-56052
REF DESCRIPTION PART #
C101 Capacitor, Ceramic, 56pF 45-56052 C102 Capacitor, Electrolytic, 10µF, 50V 47-10051 C103 Capacitor, Electrolytic, 10µF, 50V 47-10051 C104 Capacitor, Ceramic, 120pF 45-12152 C105 Capacitor, Ceramic, 120pF 45-12152 C106 Capacitor, Electrolytic, 10µF, 50V 47-10051 C107 Capacitor, Poly, .0047µF, 100V 46-47212 C108 Capacitor, Poly, .022µF, 100V 46-22312 C109 Capacitor, Electrolytic, 10µF, 50V 47-10051 C110 Capacitor, Poly, .1 µF, 100V 46-10412 C111 Capacitor, Poly, .1 µF, 100V 46-10412 C112 Capacitor, Electrolytic, 10µF, 50V 47-10051 C113 Capacitor, Electrolytic, 10µF, 50V 47-10051 C114 Capacitor, Mylar, 0.22µF 46-22412 C115 Capacitor, Electrolytic, 10µF, 50V 47-10051 C200 Capacitor, Ceramic, 56pF 45-56052 C201 Capacitor, Ceramic, 56pF 45-56052 C202 Capacitor, Electrolytic, 10µF, 50V 47-10051 C203 Capacitor, Electrolytic, 10µF, 50V 47-10051 C204 Capacitor, Ceramic, 120pF 45-12152 C205 Capacitor, Ceramic, 120pF 45-12152 C206 Capacitor, Electrolytic, 10µF, 50V 47-10051 C207 Capacitor, Poly, .0047µF, 100V 46-47212 C208 Capacitor, Poly, .022µF, 100V 46-22312 C209 Capacitor, Electrolytic, 10µF, 50V 47-10051 C210 Capacitor, Poly, .1 µF, 100V 46-10412 C211 Capacitor, Poly, .1 µF, 100V 46-10412 C212 Capacitor, Electrolytic, 10µF, 50V 47-10051 C213 Capacitor, Electrolytic, 10µF, 50V 47-10051 C214 Capacitor, Mylar, 0.22µF 46-22412 C215 Capacitor, Electrolytic, 10µF, 50V 47-10051 D1 Diode, 6A, 200V, MR752 60-75200
REF DESCRIPTION PART #
D2 Diode, 6A, 200V, MR752 60-75200 D3 Diode, 6A, 200V, MR752 60-75200 D4 Diode, 6A, 200V, MR752 60-75200 D5 LED, Small Yellow 60-24251 D6 Diode, 1A, 200V, 1N4003 61-40030 D100 Diode, 1A, 200V, 1N4003 61-40030 D101 Diode, 1A, 200V, 1N4003 61-40030 D102 LED, Small Green 60-75330 D103 LED, Small Red 60-75320 D200 Diode, 1A, 200V, 1N4003 61-40030 D201 Diode, 1A, 200V, 1N4003 61-40030 D202 LED, Small Green 60-75330 D203 LED, Small Red 60-75320 H1 Cable, Ribbon, 24AWG, 8Pin 05-24175 H2 Cable, Ribbon, 24AWG, 8Pin 05-24255 H3 Cable, Ribbon, 24AWG, 8Pin 05-24175 J100 Jack, 1/4” 7P Plastic, 24mm 21-06457 J101 XLR, Female, Neutrik 21-40000 J102 Jack, 1/4” 3P Plastic, 24mm 21-06453 J200 Jack, 1/4” 7P Plastic, 24mm 21-06457 J201 XLR, Female, Neutrik 21-40000 J202 Jack, 1/4” 3P Plastic, 24mm 21-06453 P100 Pot, B10K, 41 Click, W/BRKT 71-10301 P200 Pot, B10K, 41 Click, W/BRKT 71-10301 PRI 1 Terminal 90deg, .250 QC 06-40060 PRI 2 Terminal 90deg, .250 QC 06-40060 Q100 Trans, Darlington, NPN, 0.5A, 30V 60-00014 Q101 Trans, Darlington, NPN, 0.5A, 30V 60-00014 Q200 Trans, Darlington, NPN, 0.5A, 30V 60-00014 Q201 Trans, Darlington, NPN, 0.5A, 30V 60-00014 QC1 Zierick/Keystone, Straight, .250 QC 06-40050 QC2 Zierick/Keystone, Straight, .250 QC 06-40050 QC3 Zierick/Keystone, Straight, .250 QC 06-40050
R1 Resistor 2W, ±5%, 1.5K 54-15030 R2 Resistor 2W, ±5%, 1.5K 54-15030 R3 Resistor 1W, ±5%, 4.7K 53-47035 R4 Resistor 1/4W, ±5%, 24K 50-24045 R5 Resistor 1/4W, ±5%, 22K 50-22045 R6 Resistor 1/4W, ±5%, 10K 50-10045 R7 Resistor 1/4W, ±5%, 33K 50-33045 R100 Resistor 1/4W, ±5%, 22K 50-22041 R101 Resistor 1/4W, ±5%, 22K 50-22041 R102 Resistor 1/4W, ±5%, 22K 50-22041 R103 Resistor 1/4W, ±5%, 22K 50-22041 R104 Resistor 1/4W, ±5%, 680 50-68025 R105 Resistor 1/4W, ±5%, 5.6K 50-56035 R106 Resistor 1/4W, ±5%, 2.2K 50-22035 R107 Resistor 1/4W, ±5%, 2.7K 50-27035 R108 Resistor 1/4W, ±5%, 22K 50-20045 R109 Resistor 1/4W, ±5%, 10K 50-12045 R110 Resistor 1/4W, ±5%, 910 50-91025 R111 Resistor 1/4W, ±5%, 1K 50-10035 R112 Resistor 1/4W, ±5%, 1.5K 50-15035 R113 Resistor 1/4W, ±5%, 24K 50-24045 R114 Resistor 1/4W, ±5%, 2.2K 50-22035 R115 Resistor 1/4W, ±5%, 47K 50-47045 R116 Resistor 1/4W, ±5%, 3.3K 50-33035 R117 Resistor 1/4W, ±5%, 470K 50-47055 R118 Resistor 1/4W, ±5%, 470K 50-47055 R119 Resistor 1W, ±5%, 4.7K 53-47035 R120 Resistor 1W, ±5%, 4.7K 53-47035 R121 Resistor 1/2W, ±5%, 22 52-22015
REF DESCRIPTION PART #
R122 Resistor 1/4W, ±5%, 47K 50-47045 R200 Resistor 1/4W, ±5%, 22K 50-22041 R201 Resistor 1/4W, ±5%, 22K 50-22041 R202 Resistor 1/4W, ±5%, 22K 50-22041 R203 Resistor 1/4W, ±5%, 22K 50-22041 R204 Resistor 1/4W, ±5%, 680 50-68025 R205 Resistor 1/4W, ±5%, 5.6K 50-56035 R206 Resistor 1/4W, ±5%, 2.2K 50-22035 R207 Resistor 1/4W, ±5%, 2.7K 50-27035 R208 Resistor 1/4W, ±5%, 22K 50-20045 R209 Resistor 1/4W, ±5%, 10K 50-12045 R210 Resistor 1/4W, ±5%, 910 50-91025 R211 Resistor 1/4W, ±5%, 1K 50-10035 R212 Resistor 1/4W, ±5%, 1.5K 50-15035 R213 Resistor 1/4W, ±5%, 24K 50-24045 R214 Resistor 1/4W, ±5%, 2.2K 50-22035 R215 Resistor 1/4W, ±5%, 47K 50-47045 R216 Resistor 1/4W, ±5%, 3.3K 50-33035 R217 Resistor 1/4W, ±5%, 470K 50-47055 R218 Resistor 1/4W, ±5%, 470K 50-47055 R219 Resistor 1W, ±5%, 4.7K 53-47035 R220 Resistor 1W, ±5%, 4.7K 53-47035 R221 Resistor 1/2W, ±5%, 22 52-22015 R222 Resistor 1/4W, ±5%, 47K 50-47045 S1 Switch, DPDT, 2 Position 25-32833 S2 Switch, DPDT, Push, PC Mtg 25-02201 U100 Op-amp, Power 60-72940 U200 Op-amp, Power 60-72940 Z1 Zener Diode,16V ±5%, 1N4745A 61-47450 Z2 Zener Diode,16V ±5%, 1N4745A 61-47450
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
SAFETY INSTRUCTIONS (EUROPEAN)
The conductors in the AC power cord are colored in accordance with the following code.
GREEN & YELLOW—Earth BLUE—Neutral BROWN—Live
U.K. MAIN PLUG WARNING: Amolded main plug that has been cut off from the cord is unsafe. NEVER UNDER ANYCIRCUMSTANCES SHOULD YOU INSERTA DAMAGED OR CUT MAIN PLUG INTO APOWER SOCKET.
IMPORTANT! FOR YOUR PROTECTION, PLEASE READ THE FOLLOWING:
WATER AND MOISTURE: Appliance should not be used near water (near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, etc). Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings.
POWER SOURCES: The product should be connected to a power supply only of the type described in the operating instructions or as marked on the appliance.
GROUNDING OR POLARIZATION: Precautions should be taken so that the grounding or polar­ization is not defeated.
POWER CORD PROTECTION: Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit from the appliance.
SERVICING: The user should not attempt to service the appliance beyond that described in the operating instructions. All other servicing should be referred to qualified service personnel.
FUSING: If your unit is equipped with a fuse receptacle, replace only with the same type fuse. Refer to replacement text on the unit for correct fuse type.
REFER SERVICING TO QUALIFIED SER­VICE PERSONNEL! THIS UNIT CON­TAINS HIGH VOLTAGE INSIDE!
CAUTION
RISK OF ELECTRIC SHOCK
REPLACEMENT PARTS LIST FOR HT AMPS
This symbol is intended to alert the user to the pres­ence of uninsulated “dan-
gerous voltage” within the product’s enclosure that may be of suf­ficient magnitude to constitute a risk of electric shock to persons.
This symbol is intended to alert the user to the presence of important operating and maintenance (servicing) instruc­tions in the literature accompanying the appliance.
LIMITED WARRANTY
Your Carvin product is guaranteed against failure for ONE YEAR. Carvin will service and supply all parts at no charge to the customer providing the unit is under warranty. Shipping costs are the respon­sibility of the customer. CARVIN DOES NOT PAY FOR PARTS OR SERVICING OTHER THAN OUR OWN. A COPY OF THE ORIGINAL INVOICE IS REQUIRED TO VERIFY YOUR WARRANTY. Carvin assumes no responsibility for horn drivers or speakers damaged by this unit. This warranty does not cover, and no liability is assumed, for damage due to: natural disasters, accidents, abuse, loss of parts, lack of reasonable care, incorrect use, or failure to follow instructions. This warranty is in lieu of all other warranties, expressed or implied. No representative or person is authorized to rep­resent or assume for Carvin any liability in connection with the sale or servicing of Carvin products. CARVIN SHALL NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES.
When RETURNING merchandise to the factory, you may call for a return authorization number. Describe in writing each problem. If your unit is out of warranty, you will be charged the current FLAT RATE for parts and labor to bring your unit up to factory specifications.
HELP SECTION
1) WILL NOT TURN ON
Check the power to the unit. Check for tripped circuit breakers, unplugged extension cords or power-strip switches that may be turned off. Check the fuse. If a dark brownish color or no wire can be seen within the glass fuse, then replace. The unit may be perfectly fine but occasionally the fuse may blow because of high AC voltage surges. After the fuse has been replaced with the proper value and if the fuse fails again, the product will require servicing (be sure to use a slow blow fuse if required). Check your input and speaker output cables.
2) MAINTAINING YOUR EQUIPMENT
Avoid spilling liquids or allowing any other foreign matter inside the unit. The panel of your unit can be wiped from time to time with a dry or slightly damp cloth in order to remove dust and bring back the new look.
As with all pro gear, avoid prolonged use in caustic environments (salt air). When
used in such an environment, be sure the amplifier is adequately protected by rack, covers, etc..
3
8
7
10
3
2
3
6
4
1
9
5
THIS UNIT CONTAINS HIGH VOLTAGE COMPONENTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
CARVIN ENGINEERING DATA OPERATING MANUAL
The HT150 professional amp is designed utilizing Carvin’s 33 years of experience in power amp technology. It meets and exceeds every standard for professional amplification. The thick brushed anodized aluminum face plate, large recessed knobs and heavy-duty steel chassis reflect the manufacturing quality within. The HT150 “High Energy Transfer” amp carrys the CE approval for world-wide use.
PURE—TRANSPARENT SOUND
Carvin considers the sound of an amp equally important as its reliabil­ity. To insure pure, uncolored sound, we designed one of the fastest responding power amps on the market today. High slew rates deliver superb transient response. High frequencies are transparent and open— even at extreme levels. Linear feedback circuits reduce distortion to near the theoretical zero limit, preventing any type of harshness which would lead to ear fatigue. The HT150 amp delivers flat, transparent, unaltered sound—especially important to the studio user . These amps are designed to deliver non-stop, continuous power and are completely protected from heat and short circuits.
ULTRA RUGGED FOR TOURING
Every chassis is made from heavy-duty 16 gauge aluminumthat is light-weight and prevents rust. All internal cabling is neatly tied and harnessed. Neutrik™ XLR connectors, heavy-duty power switches, recessed knobs & machined aluminum front panels all give the HT amps a “tank-like” ability to handle rough, touring transport.
TOTALLY MODULAR
With the HT150, Carvin brings you totally modular construction. If you ever need an I/O (input/output) connector card because a connector wore-out, just unplug it and re-install the replacement card in minutes. You don’t have to de-solder anything. This applies to every aspect of the HT150 amp including the power supply, power cards, heat sinks and fans. Everything is connected by heavy-duty connectors for easy replacement—even the Toroid transformer is a total plug-in.
LOSE THE WEIGHT...NOT THE PERFORMANCE
For some companies weight reduction means cost reduction. Carvin however, uses expensive TOROID transformers to reduce weight. Toroids deliver extra amounts of “on demand” current for continuous operation. This gives the power supply a solid foundation, yielding more headroom. Not only do toroids deliver high current, but they are known for reducing stray magnetic fields eliminating hum & noise. This is espe­cially important for the recording industry.
HT150 POWER AMP SPECIFICATIONS:
Output Power
(BRIDGE MONO) 8, 1kHz, < 1% THD 150 Watts Minimum Impedance (Bridged) 4 ohms
(Stereo, both channels driven) 8, 1kHz, < 0.5% THD 60/60 Watts 4, 1kHz, < 0.5% THD 75/75 Watts Minimum Impedance 4 ohms per channel
THD
20-20kHz < 0.1% (8typical) < 0.05%
Frequency Response ±0.5 dB, 20 Hz to 20 kHz Input Impedance > 20kBalanced or Unbalanced Damping Factor >400 Sensitivity (@ 4) 1.0 Vrms Output Noise -102 dBm
Power Consumption 120V—200 VA
230V—200 VA
Dimensions 1 3/4” High x 19” Wide x 10” Deep Weight (Net) 9lbs.
76-20300 497
12340 World Trade Drive, San Diego, CA 92128
(619) 487-1600 (800) 854-2235
www.carvin.com
For your records, you may wish to record the following information. Serial No._____________________ Invoice Date_______________
RECEIVING INSPECTION—read before getting started
INSPECT YOUR UNIT FOR ANY DAMAGE which may have occurred during shipping.
If any damage is found, please notify the shipping company and CARVIN immediately.
SAVE THE CARTON & ALL PACKING MATERIALS. In the event you have to re-ship your unit, always use the original carton and packing material. This will provide the best possible protec­tion during shipment. CARVIN and the shipping company are not liable for any damage caused by improper packing.
SAVE YOUR INVOICE. It will be required for warranty service if needed in the future.
SHIPMENT SHORTAGE. If you find items missing, they may have been shipped separately .
Please allow several days for the rest of your order to arrive before inquiring.
RECORD THE SERIAL NUMBER on the enclosed warranty card or below on this manual for your records. Keep your portion of the card and return the portion with your name and comments to us.
HT150 POWER AMP
FRONT PANELS & CONNECTING UP
The HT150 features front panel signal, peak and protect LEDs which let you monitor the status of the amp easily. Also, both channels use preci­sion 41 detent level controls allowing you to see your settings at a glance. The EQ expand switch offers “loudness compinsation” by adding additional bass and treble to improve your sound, especially at lower levels. Balanced 1/4 phone & XLR input jacks are used to eliminate hum & noise. Speaker outputs feature 1/4” jacks & heavy-duty binding posts that accept up to 50 amp #7 speaker wires. A bridge mode switch allows the HT150 to deliver its full power into one speaker.
FRONT PANEL
1. MOUNTING
Sturdy one piece aluminum handles make for easy transporting along with facilitating rack installation. The rack mounting holes are designed on ISO standard spacing. Four 10-32 x .5” phillip machine screws are normally used to secure the amp. Rear support brackets are not required.
2. POWER SWITCH
Check the power amp connections and verify the AC line power source before engaging the POWER switch. The yellow LED unmistakably indi­cates that all circuits are properly powered up. This color was chosen so the operator could see other red indicators from a distance.
3. CHANNEL LEVEL CONTROL
A precision 41 step input LEVEL attenuate is used to adjust the volume levels. T o deliver the amps full power without reducing headroom of the signal source, the level controls should be turned up approximately 1/3 (15 on the dial).
4. CHANNEL SIGNAL INDICATOR
The green SIGNAL LED indicators will start to flash when there is a signal passing to your speakers (-30dBM). This lets you know when the amp is passing a signal to your speakers.
5. CHANNEL CLIP INDICATOR
The red CLIP LED indicators will start to flash when each channel has reached its maximum output. Occasional flashing caused by lower bass frequencies is OK. However, consistent flashing caused from higher frequencies may damage high frequency drivers (excessive distortion). This does not cause damage to the amp.
6. EQ EXPAND SWITCH
This switch, when set to its ‘in’ position will boost the highs and lows by +4dB at 80Hz and 12kHz. This works well as a loudness contour when operating at low volume levels or adds flavor when using it in a bass or guitar rack. When set to the ‘out’ position it provides a flat output response. Try it both ways and set as desired.
REAR PANEL
7. XLR CHANNEL INPUTS
For most professional applications, use the XLR balanced input. This will help to reduce hum and allow of longer cable runs from your signal source (mixer, etc). Because this is a balanced input, the gain will be 6 dB higher than using the 1/4” input jack with a non balanced line. XLR pin configuration: Pin 1: Grounded through the GROUND LIFT switch, Pin 2: positive Bal. signal and Pin 3: negative Bal. signal.
8. CHANNEL 1/4” PHONE JACK INPUT
This stereo phone jack is designed to receive either balanced or unbalanced input signals. Balanced signals coming into this jack should be wired with the connector’s tip going to signal + and the connector’s ring to signal -.
9. SPEAKER OUTPUTS
The standard 1/4” SPEAKER jacks are used for most applications. T urn
the amp off before connecting your speakers.
10. SPEAKER BINDING POSTS
For heavy-duty speaker connections, use the rear BINDING POSTS to con­nect your speakers. Wire sizes up to 7 gauge (50 amps) can be inserted into the binding posts “side holes”. Larger cable can be used with “banana” plugs which plug into the ends of the binding post (remove colored caps). Binding posts are spaced on ISO standards. Use the two center RED bind­ing posts for BRIDGE speaker connections (see 11 BRIDGE MODE).
11. BRIDGE MODE—
25V/70V DISTRIBUTION SYSTEMS
The HT150 can be operated in bridge mode if you require a 25V / 70V distribution speaker system or a high powered mono (single channel) amp. With your amp off, push in the rear BRIDGE switch after you have made your speaker connections to the rear center RED binding posts (ch 1 is + and ch 2 is -). No other speaker jack or binding post can to be used at the same time!”. The INPUT and LEVEL is handled by channel 1. Channel 2 is non-operational. The minimum speaker impedance is 4 ohms or a 25V distribution line. CAUTION: The power developed by bridging your amp can destroy most speaker systems!
12. AC POWER
Your amp is designed to run on either 120V 60 Hz or 230V 50V depend­ing on the model purchased. The voltage range for 120V is 95V to 132V and for 230V it is 190V to 253V . The rear heavy-duty AC cord is designed for your country. Be sure to check your power source before plugging into a grounded (3 prong) outlet. Never defeat the grounded connection or electrocution may result!
13. AC FUSE VALUES
(Slow Blow Type)
120V MODELS: 2.5AGC 230V MODELS: 1.25AGC
261 3 4 5
FRONT & REAR PANEL CONTROLS
8 7 11 12 139 1011
FUSE
21321
3
120VAC 60Hz 200 VA
FUSE = 2 A SLOW BLOW
WARNING — REPLACE FUSE ONLY WITH SAME TYPE AND VALUE.
WARNING — TO PREVENT FIRE OR SHOCK, DO NOT EXPOSE TO RAIN OR MOISTURE.
WARNING — DO NOT REMOVE COVER. NO USER SERVICEABLE PARTS INSIDE. CAUTION — TO PREVENT SHOCK DO NOT DEFEAT THE SAFETY GROUND.
WARNING — TO PREVENT A FIRE HAZARD, PROVIDE ADEQUATE VENTILATION !
75 75 WATTS
4 OHMS MIN. PER CH.
STEREO
MONO
1
+
2
INPUT 1
MONO
BRIDGE
S/N REMOVED
BRIDGE SPEAKERS
INPUT 2
+
BALANCED LINE
MADE
AUS
INTHE
8 OHMS 
MIN. 
BRIDGE INPUT
LOWER LOADS MAY RESULT IN PREMATURE DISTORTION !
25V or 70V
Distribution System:
"TAP" Wattage of transformer
(can vary from diagram) divided by total wattage
of Amp = Number of
transformer/speaker(s)
that can be hooked up.
To signal use XLR or 1/4" 2 or 3 cond. shielded cable
Activate the BRIDGE switch (IN). Control the level by Ch 1 ( Ch 2 does not function.
Ch 1 Input
+
16
8 4
C
or
Single speaker or
system connected
in BRIDGE mode.
Minimum imp. 8
15w
7w 3w 1w
C
+
16
8 4
C
15w
7w 3w 1w
C
TYPICAL BRIDGED SETUP
CONNECTING THE SYSTEM
The following diagrams illustrate typical connections. Although these illustrations show XLR’s for inputs and 1/4” plugs for outputs, a variety of alternative connectors are available. For most stage setups, mono (not stereo) is recomended. The reason for this is the audi­ence on the left will not hear the same program material the audience on the right hears if the program is done in true stereo.
INPUT CONNECTIONS
The preferred method of connecting input signals is with balanced XLR’s (two conductors plus a shield wire, such as Carvin professional XLR cables). Balanced input signals provide the highest gain and best noise rejection. 1/4” stereo cables are also capable of providing balanced input by using a stereo plug (tip-positive, ring-negative & sleeve-ground). Not all sources provide balanced outputs. If this is the case, standard 1/4” input cables work fine with cable lengths under 25 feet (single conductor plus shield) providing there is no ground loop in the system.
TYPICAL MONURAL SETUP
FUSE
21321
3
120VAC 60Hz 200 VA
FUSE = 2 A SLOW BLOW
WARNING — REPLACE FUSE ONLY WITH SAME TYPE AND VALUE.
WARNING — TO PREVENT FIRE OR SHOCK, DO NOT EXPOSE TO RAIN OR MOISTURE.
WARNING — DO NOT REMOVE COVER. NO USER SERVICEABLE PARTS INSIDE. CAUTION — TO PREVENT SHOCK DO NOT DEFEAT THE SAFETY GROUND.
WARNING — TO PREVENT A FIRE HAZARD, PROVIDE ADEQUATE VENTILATION !
75 75 WATTS
4 OHMS MIN. PER CH.
STEREO
MONO
1
+
2
INPUT 1
MONO
BRIDGE
S/N REMOVED
BRIDGE SPEAKERS
INPUT 2
+
BALANCED LINE
MADE
AUS
INTHE
8 OHMS 
MIN. 
BRIDGE INPUT
LOWER LOADS MAY RESULT IN PREMATURE DISTORTION !
Ch 2 Speaker
Use 16 guage or heavier
Non shielded cables (PH50)
Plug into the 1/4" speaker jacks
or strip and insert into speaker
Binding Post (Red+ Black-)
Ch 1 Speaker
To signal use XLR or 1/4" 2 or 3 cond. shielded cable
BRIDGE switch must be OFF (OUT).
TYPICAL STEREO (BIAMP) SETUP
FUSE
21321
3
120VAC 60Hz 200 VA
FUSE = 2 A SLOW BLOW
WARNING — REPLACE FUSE ONLY WITH SAME TYPE AND VALUE.
WARNING — TO PREVENT FIRE OR SHOCK, DO NOT EXPOSE TO RAIN OR MOISTURE.
WARNING — DO NOT REMOVE COVER. NO USER SERVICEABLE PARTS INSIDE. CAUTION — TO PREVENT SHOCK DO NOT DEFEAT THE SAFETY GROUND.
WARNING — TO PREVENT A FIRE HAZARD, PROVIDE ADEQUATE VENTILATION !
75 75 WATTS
4 OHMS MIN. PER CH.
STEREO
MONO
1
+
2
INPUT 1
MONO
BRIDGE
S/N REMOVED
BRIDGE SPEAKERS
INPUT 2
+
BALANCED LINE
MADE
AUS
INTHE
8 OHMS  MIN. 
BRIDGE INPUT
LOWER LOADS MAY RESULT IN PREMATURE DISTORTION !
Full Range
(Lo Freq. Bi-Amp)
Woofer System
Full Range
(Hi Freq. Bi-Amp)
Horn System
(Hi Freq. Bi-Amp)
(Lo Freq. Bi-Amp)
Ch 1 Left
Ch 2 Right
BRIDGE switch must be OFF (OUT).
Use 16 guage or heavier
Non shielded cables (PH50) Plug into the 1/4" speaker jacks or strip and insert into speaker
Binding Post (Red+ Black-)
SPEAKER CONNECTIONS
There are two 1/4” speaker jacks available for speaker connections (one for each channel). Additionally, there are two pairs of binding posts that not only allow for high current con­nections to speakers but are also used for “bridging” the amps output (see rear panel sec­tion 14 & 15). Use heavy gauge wire for all speaker connections (no lighter than 16 gauge up to 50’, Carvin’s PH50). Caution: Never use shielded cable (microphone or instrument input cable) to connect speakers. These cables will not handle the required current and may cause your amplifier to oscilate because of the internal shield.
SPEAKER OR SIGNAL LINE CABLE
INTERRUPT (PATCH) STEREO OR BALANCED SIGNAL LINE
(Unshielded) (Shielded)
(Shielded)
SHIELD (GROUND)
+ SIGNAL (SEND)
- SIGNAL (REC.)
SHIELD (GROUND)
+ TIP (HOT)
SHIELD
HOT
2
1
3
COLD
SHIELD
HOT
2
1
3
COLD
SHIELD (GROUND) + SIGNAL (BAL.)
- SIGNAL (BAL.)
BALANCED MIC/LINE
(Shielded)
3
2
1
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