Transcript
AS-B ACTIVE SUBWOOFER
USER MANUAL
USER MANUAL AS-B ACTIVE SUBWOOFER The information contained within this manual does not include all of the details of design, production or variations of the equipment. Nor does it cover every possible situation that may arise during installation, operation or maintenance. If you need particular assistance beyond the scope of this manual please contact our technical staff.
CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN
WARNING! RISK OF HAZARDOUS ENERGY!
Magnetic Field - Caution
TO REDUCE RISK OF ELECTRIC SHOCK OR FIRE DO NOT EXPOSE TO RAIN OR MOISTURE.
Do not locate sensitive high-gain equipment such as pre- amplifier or tape decks directly above or below the unit.
NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. UNIT MUST BE EARTHED AND CORRECTLY FUSED.
Because this amplifier has a high power density it has a strong magnetic field which can induce hum into unshielded devices that are located nearby. The field is strongest at the back of the unit.
The lightning bolt triangle is used to alert the user to the presence of un-insulated “dangerous voltage” within the unit that may constitute a risk of electric shock.
The exclamation mark triangle is used to alert the user to important operating or maintenance instructions in the literature accompanying the product.
CE Conformity
Features
This equipment has been tested and found to conform to the requirements of the EMC Directive 89/336/EEC, the requirements of the Low Voltage Directive 73/23/EEC, amended by 93/68/EEC and to the following standards:
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EMC Emission EN55103-1 (1996) EMC Immunity EN55103-2 (1996) Electrical Safety EN60065 (1998)
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Soft Start DC Fault Protection Thermal Cut Off (85ºC Protection and 82ºC Working) Current Limiting User Selectable Input Sensitivity Inputs and Links on XLR or Phono Sockets Outputs on Neutrik Speakons® Attractive styling
AS-B ACTIVE SUBWOOFER Introduction Congratulations on having purchased an OHM AS-B Active Subwoofer. Please read this manual and familiarise yourself with the operation of your OHM AS-B Active Subwoofer before you attempt to power up this unit. For your own safety we recommend you take the time to read all the warnings and precautions on the page opposite and study the connection details to ensure correct usage and avoid any misuse which may invalidate your warranty. Record the model and serial number, found on the back of the unit, in the spaces designated on the warranty card and in the space provided below. Refer to the model and serial number whenever you call upon your dealer for information or service on this product. Model
Serial Number
Unpacking Carefully open the shipping carton and check for any noticeable damage. Every OHM AS-B Active Subwoofer has been rigorously tested and inspected before being carefully packaged, prior to shipping. If any damage has occurred to the packaging or the unit during transit, please notify the delivery company as soon as possible. Only the consignee can file a claim against the carrier for shipping damage. Be sure to save the carton and all packing materials for the carriers inspection. We recommend that you retain the original carton and packing materials for use should you transport or ship the unit in future.
Mounting Enclosure should be positioned far enough away from a wall so as not to impede airflow from the fan. Auto power selected means that the unit reverts to a standby mode if a signal in not detected after a few minutes, likewise the unit ‘wakes up’ when a signal is present.
Environment Unrestricted airflow to and from the amplifier is crucial to maintain optimal performance. The air which is drawn in through the vents on the rear is forced through the heatsink channels to exit at the rear. It is important to provide sufficient ventilation at the rear of the amplifier. Cool air should be made available to assist control of the internal temperature whenever possible.
Precautions
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Retain this manual for future reference. Always check that the correctly rated power is supplied to your amplifier. Do not allow the ventilation holes at the rear of the amplifier to get blocked or obstructed in any way. Pay attention to the information on the rear of the amplifier, particularly the wiring details for the inputs and outputs. Ensure the mode switches (Sensitivity, Phase, Crossover, Auto switch, Earth lift) are in the correct position for the required operating mode and all necessary input and output connections are made before switching on your amplifier. Under no circumstances should you connect the speaker outputs to the input or output stages of any other amplifier. Never short the “live” inputs or outputs to ground. Do not switch on multiple amplifiers at the same time. Avoid direct contact of your amplifier with water or other liquids. Do not operate while standing in liquid. When cleaning the amplifier wipe with a soft, dry cloth. If more heavy duty cleaning is required disconnect from the mains and use a damp cloth, ensuring that the unit is completely dry before reconnecting to the mains. Do not use solvents or chemicals on the exterior of the amplifier as they may cause the surface to discolour and peel. Do not use this unit if the power cord is frayed or broken. If you experience continuous problems, disconnect from the mains and refer to a qualified service engineer.
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SATS SUB
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FRONT 1 Rubber Feet. Anti skid feet are fitted to the bottom of the cabinet to stop the cabinet from skating about the floor. 2 Bass Driver. Two Heavy duty 10” proprietary Cast Aluminum Chassis Bass Woofers with 2” voice coils and large magnet assemblies ensure longevity and exceptional power handling.
6 Attractive Cabinet Styling. Substantial 18mm heavily braced MDF housing painted in OHM Anthracite, hard wearing paint. 7 Dual Port Tubes. Reflex loaded port design bass enclosure. Substantially sized port tubes are used to avoid air noise, so apparent in lesser systems. 8 and 9 Two Recessed Pocket Handles.
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Perforated Kickproof Grill. Custom made 1.6mm thick perforated metal mesh. Powder coated for durability. Offers protection to the drivers especially if the cabinets low profile is fully taken advantage of in under bench seating areas.
4 Stainless Steel Logo. Attractive stainless steel brushed logo fitted with Left and Right Satellite blue status LED indicating that the amplifiers are operational. 5 Reticulated Foam Front.
One per side. Provided to facilitate easy moving of the unit.
DESIGN PHILOSOPHY The AS-B is designed to be used as the basis of a sub/sat system or as an add on to an existing system where additional low frequency capability is required. The AS-B can be used with any speakers with an impedance not lower than four ohms. Recommended Ohm speakers can be found on page six.
PROTECTION Built in Limiter.
Glued on to the perforated metal mesh. Attractive and prevents direct spillage and dust contaminating the loudspeaker cones.
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Each channel of the AS-B comes with a Built in Limiter to prevent the amplifier being over driven.
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AS-B ACTIVE SUBWOOFER
MADE BY THE OHM GROUP
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REAR PANEL 1
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and 7 Left and Right Input Connectors. Electronically balanced Neutrik® input Combi sockets accept 1/4 Balanced Jack plugs or male XLR Connectors. Wired as follows: Pin 1 (sleeve)= Ground, Pin 2 (tip)= Hot, Pin 3 (ring)= Cold Heatsink Ventilation Slots Do not obstruct these slots as the amplifier requires unrestricted airflow to aid cooling.
3 and 6 Left and Right Link Connectors. Electronically balanced Neutrik® Link sockets accept XLR Female connectors. Wired as follows: Pin 1 = Ground, Pin 2 = Hot, Pin 3 = Cold 4
and 5 Phono Inputs / Links Wired as follows: Sleeve = Ground, Tip = Live
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Input Sensitivity Switch. Two position sensitivity switch. Full output power for an input level of 1.40V Full output power for an input level of 0.77V
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Phase Reverse 0° - 180° Reverses the phase of the system.
12 Mid High Gain Control Adjusts the volume level of the left and right satellite outputs. 13 Auto Power Switch Senses if signal is present and switches on or off accordingly. Unit remains in standby mode. 14 Earth Switch Setting this switch from GROUND to LIFT separates the signal ground from the chassis ground, thus breaking the “Ground Loop” between adjacent chassis grounds in the signal path. 15 and 16 Left and Right Output Neutrik Speakons® Left and right satellite speaker outputs minimum impedance 4 ohms per channel. Use cable with a minimum 1.5mm cross section. Wired as follows: Pin 1+ = positive, Pin 1- = Negative 17 IEC Fused Mains Inlet A heavy duty lead is provided. If the panel fuse fails always replace with a correctly rated substitute. 18 Mains Switch Switches the amplifier on and off.
10 Bass Gain Control Adjusts the volume level of the Subwoofer. Left and right input signals are summed as a mono signal.
19 Power on LED When lit, this LED indicates that the Amplifier is switched on.
11 X-Over Frequency control Fine tunes the x-over frequency between 100Hz and 150Hz. Adjust to personal preference.
20 Cooling Fan Provides assisted cooling to the internal heatsink, the fans airflow must not be obstructed.
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2 x KS-1 (8Ω) 5¼” Bass unit and 14mm polycarbonite High Frequency unit.
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KC-1
SWB
S-SA
a
Speakon option
KC-3
SWB
S-SA
a
Speakon b option
BC-5
SWB
S-SA
Speakon a option
b
BC-6
SWB
S-SA
Speakon a option
b
BC-8
LWB
W-SA
b
2 x KS-3 (8Ω) 8” Bass unit and high efficiency Bullet Tweeter.
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4 x BR-5 (16Ω) 6”, 35mm coil Bass unit and 1” Horn loaded Soft Dome Tweeter.
* 2 x BR-6 (8Ω) 2 x 6”, 35mm coil Bass units and Fluid Cooled Dual Phasing Plug Bullet Tweeter.
2 x BR-8 (8Ω) 2 x 8” Bass units and 2 x Fluid Cooled Dual Phasing Plug Bullet Tweeters.
Minimum Load 4 Ohms per channel
Notes:
4Ω 4Ω
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The SS-A stand adapter allowing cabinets to pan and tilt can be used in conjunction with the SS-1 heavy duty speaker stand.
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Business Music* speakers are fitted with binding posts as standard, for hard-wiring or use of Pomona plugs. A factory fitted dual Neutrik® Speakon option is available.
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The BR-8 is fitted as standard with dual Neutrik® Speakon connectors, EP-5’s are available as a factory fitted option. The enclosure is fitted with a top hat as standard to accept the SS-1 heavy duty speaker Stand.
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The WS-A attaches to the LWB wall bracket and fits into the recess when the top hat is removed. This accessory allows the cabinet to pan and tilt.
MADE BY THE OHM GROUP
SS-1 Heavy Duty Speaker Stand Model
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Impedance (ohms)
Power Handling Rms Watts
Programme Watts
Spl 1w/1m (db)
Max @ 1m (db)
Frequency Response (-3db)
Crossover
Active Crossover
d EP-5 option c
Dispersion
Dimensions
Weight
3.8
KS-1
8
50
100
88
107.5
90Hz-20kHz
5kHz
110Hz
100 x 100
192x257x192
KS-3
8
100
200
89
111
75Hz-20kHz
3.6kHz
100Hz
100 x 100
248x350x234
8.0
BR-5
16
100
200
92
111
125Hz-20kHz
7kHz
110Hz
120 x 80
280x189x184
4.8
BR-6
8
200
400
94
117
125Hz-20kHz
5kHz
110Hz
100 x 80
410x189x184
7.6
BR-8
8
250
450
101
125
80Hz-20kHz
4.2kHz
100Hz
160 x 80
336x458x315
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AS-B ACTIVE SUBWOOFER
Amplifier Power Ratings and Specifications
Output Power (1kHz THD<0.1%)
NOTES:
Mid-Hi 2 x 200 Watts into 4 Ohms Subwoofer 300 Watts into 4 Ohms
Signal Noise Ratio (A-Weighted)
>100dB
Input Impedance
20K Ohm Balanced
Input Sensitivity
0.77 V 1.4 V
Variable Crossover
100Hz - 150Hz
Input Connectors
Neutrik® Combo, RCA Phono
Link Connectors
Neutrik® XLR
Output Connectors
Neutrik® Speakon Connectors
Protection
Full Short Circuit Open Circuit Thermal On/Off Muting Limiter
Cooling
Two Speed Fan
Power Supply
AC 230V 50Hz
Controls
0.77 V / 1.4 V Input Sensitivity Switch
0°/180° Phase Switch
Bass Gain Left + Right Summed
Crossover Frequency
Mid-Hi Gain (Left and Right)
Auto Power Switch
Earth Lift Switch
Mains Switch
Dimensions (mm) (H x W x D)
313 x 670 x 580
Weight (Kgs)
38
As part of our continuous R & D programme,
reserves the right to change specifications without prior notice.
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