SWR Sound Bass Combo Amplifier owner manual Black Beauty Getting Started

Frequency Response (power amplifier)

–3dB @ 20 Hz and 40 kHz

Sensitivity (full output under clipping, 8 ohms load, 100 Hz)

Passive Input Jack: 38 millivolts

Active Input Jack: 60 millivolts

Power Amplifier (Effects Return Jack “in”): 5 volts

Input Impedance

Passive/Active Input: 800k Ohms

Active Input: 60k Ohms

Effects Return: 27k Ohms

Output Impedance

Effects Send: 100 Ohms

Tuner Send: 100 Ohms

XLR (Balanced) Out: 750 Ohms

Signal To Noise Ratio

–72 dB (<10 millivolts typical)

Equivalent Input Noise

9 microvolts

Dimensions

23" W x 25-7/8" H x 18-3/8" D

Weight

95 lbs.

BLACK BEAUTY – GETTING STARTED

Remove the AC cable from the accessory pack and connect it from the amplifier to a standard wall outlet. Make sure that the “Gain” and “Master Volume” controls are set to the minimum position (fully counter-clockwise). Locate the power switch on the right side of the front of the unit and turn the amplifier on. Upon powering up, don’t be surprised if you hear a small pop. This is absolutely normal and will not cause damage to your speaker system.

(Eliminating this “power on transient” would require a component called a relay. SWR chose not to incorporate this type of component due to the fact that relays degrade signal quality and often fail, causing the unit to have no output and requiring a trip to a local service center. If you wish not to hear the pop upon power up, locate the “Speaker On/Off” switch on the rear panel and set it to “Off” before you turn the unit on. Be sure to remember to set the switch back to “On” afterwards, or you may find yourself wondering why you don’t hear anything.)

Plug your instrument into the desired input jack (refer to “Front Panel Features” for greater detail). Turn your instrument’s volume up to at least 75% of maximum and slowly adjust the gain control. Once you begin to play your instrument and you see the red light (marked “preamp clip”) over the gain control illuminate, back off the gain a bit. Now turn up the “Master Volume” and you should hear the sound of your instrument amplified through the Black Beauty. For more detailed information, please read the entire manual carefully so that you can fully realize the potential of the your new Black Beauty.

For those who wish to use an extension speaker cabinet with the Black Beauty, please skip ahead to “Extension Speaker Output Section” on page 12.

BLACK BEAUTY OWNER’S MANUAL • 3