Power Amplifier Amp
amplifier turned off when power wire touched the exterior of the amp itself?
i was hooking up my system in my car, and am fairly new to the whole thing. Ive done it about 5-8 times in my own cars. This time however, i accidentally touched the power wire to the outside of the amp, and now it does not turn on. I have replaced all the fuses and I still cannot figure out what is wrong. If anyone has any help it would be greatly appreciated. Thanks!
Josh
As the others have said the amp is probably cooked as the case/shell of the amp is grounded to the battery ground terminal but not directly as the current goes through the circuit board traces and a direct short from power to the case usually vaporizes those traces and since in a good amp circuit layout the ground traces form a star pattern (no loops) starting from the ground terminal and the legs of the star that are connected to the case also feed other components when the trace is gone the amp can’t function as not all of the components inside that need a ground are grounded anymore.
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QSC Amplifier SF-3 $165 QSC Amplifier SF-3 The SF-3 subwoofer filter allows the addition of subwoofers to an existing full-range system, offering adjustable low-pass filtering and high-pass subsonic filtering with optional B6 boost and mono-summing. The unit mounts to the rear panel of a two-channel DCA, CX, or ISA amplifier to save cost and rack spack. The amplifier’s DataPort provides the accessory’s operating power and receives the output signals, eliminating added external wiring or power transformers. For subwoofer material derived from full-range audio, a 4th-order Linkwitz-Riley low-pass filter lets you set the upper range of the subwoofer band to 80, 150, or 250 Hz. The subsonic filter offers a range of roll-off frequencies from 20 to 50 Hz to protect subwoofers from over-excursion, with optional equalization to extend the response of B6 speaker enclosures. A trim control provides 0 to 20 dB of attenuation for matching levels among the various frequency bands. Filter frequencies are programmable via provided SIP resistor networks. Get Your QSC Amplifier SF-3 Today! |
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Rane Multichannel Amplifier $1099 Rane Multichannel Amplifier The 100 watt per channel, four-channel MA 4 amplifier achieves unparalleled power density, reliability and features in a space saving 1U, 19 inch rack mount chassis weighing only eight pounds (3.6 kg). A universal-voltage switching power supply provides near perfect Power Factor, reducing peak currents to 1/4 compared to non power-factor-corrected supplies. A long list of unique features ranging from constant load power to built in automatic redundancy switching to advanced dynamics control, qualify the MA 4 for the most demanding fixed installation applications. The MA 4 excels in Music and Paging systems, small conference rooms and speech reinforcement applications requiring multiple amplifiers. Advanced dynamics control algorithms adapt to changes in temperature, load impedance and sensitivity setting. The result is a truly plug-and-play amplifier that ensures excellent signal integrity at all times. Intelligent plug-and-play features Universal voltage, power-factor-corrected power supply Very low inrush current 100 watts x 4 channels in 1U chassis Built-in load monitoring Remote fault reporting and redundancy switching Optional MT 4 four-channel 70/100 volt transformers in 1U chassis Adjustable high-pass filters and remote level controllable Advanced dynamics control adjusts for sensitivity setting, load Z and temperature |
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Rane MA3 Multichannel Amplifier $529 Rane MA3 Multichannel Amplifier The MA 3 is a three-channel amplifier designed to operate reliably in commercial environments. The MA 3 was specifically designed for use in: Paging Foreground Music Background Music Distribution. It is also a perfect companion to the Rane family of paging, foreground music, and background music products, such as the Rane CP series. Each channel of the MA 3 delivers 40 watts of continuous average power into 8 ohms and 60 watts into 4 ohms. Up to three optional 40 watt, 70.7 volt or 100 volt constant-voltage audio transformers may be installed inside the MA 3, eliminating the need for external wiring or transformer mounting. The MA 3 uses a conventional linear power supply with toroidal transformer. This configuration minimizes the emissions associated with switching supplies and noisier transformer designs. The power supply features independent secondary supplies for each channel, minimizing load regulation interaction and crosstalk. Thermal management is accomplished with a sealed heat-tunnel design incorporating low velocity forced air and large aperture openings. This design minimizes the noise usually associated with forced air cooling and eliminates the need for an air filter. Forced air cooling allows the amplifier to operate reliably in harsh environments and avoid the buildup of heat in unventilated racks associated with passive convection cooling. The combination of a solid, conservative power supply and forced air cooling allows the MA 3 to simultaneously deliver 60 watts of continuous-average-power to all three channels. SPiKe* dynamic protection circuitry completely safeguards each channel against over-voltage, under-voltage, overloads, transients from inductive loads, thermal runaway and instantaneous temperature peaks. Biasing is not allowed to occur when an under-voltage condition exists, reducing turn on and turn off transients.Fast-response limiters allow the MA 3 to tolerate up to 20 dB of overdrive into 8 and 4 ohm loads while holding THD below 1 percent. This means no loss of speech intelligibility or harsh clipping. This feature greatly increases the dynamic range of the system without external limiters. Peak-responding, load-adaptive meters accurately indicate the remaining headroom. The meters are helpful in setting system levels and indicating signal compression. Balanced inputs with Euroblock connectors are provided. Euroblock output connectors accept up to 12 gauge wire. Rear panel Level controls allow amplifier sensitivity adjustment. Internally selectable 80 Hz highpass filters offer protection against over excursion of small bookshelf speakers and saturation of distribution transformers at low frequencies. |
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Gretsch G5222 Electromatic Compact Amplifier $195 Gretsch G5222 Electromatic Compact Amplifier Five watts. Two tubes. Two inputs. Too cool! Designed by guitarists, the low-output, easy-to-record Electromatic G5222 guitar amp is ideal for small-room jam sessions and recording projects. Crank the amp’s volume and adjust the guitar’s controls for a variety of sounds. Not only does it spank, sparkle and growl, but the visual factor is undeniably Gretsch. Gretsch Guitars Electromatic G5222 5W 1×6 Tube Guitar Combo Amp Features: Wattage: 5 watts Impedance: 4 ohms Speaker: One 6", 4 ohm Special Design driver with ceramic magnet Channels: Two (High and Low Sensitivity) Controls: Single volume control Extension Jack: External speaker output Inputs: High-gain and low-gain inputs Handle: Leather strap handle Get Your Gretsch G5222 Electromatic Compact Amplifier Today! |
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Rane HC4 Headphone Amplifier $219 Rane HC4 Headphone Amplifier Very simple. You and up to three other friends want to listen to the same mix under headphones. Just take the HC 4, plug in, turn on, adjust your individual volumes, and groove away. The HC 4 provides master stereo Inputs which can be used to drive the four stereo headphone amplifiers. A Mono switch is provided on the front panel to drive both channels of all four amplifiers from a common mono source. The HC 4 is capable of delivering up to 200 milliwatts into headphones with rated impedances between 32-600 ohms. The precise amount of power depends on the exact impedance of the headphone in use and the number of headphones connected to the unit. Under most conditions, the HC 4 produces sound pressure levels in excess of 120 dB. This level is more than adequate for most listeners. See “Understanding Headphone Power Requirements”, with an output listing of some available headphones. |
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Rane DA216A Distribution Amplifier $379 Rane DA216A Distribution Amplifier The Rane DA 216a Distribution Amplifier is a two-input, sixteen-output splitter/distribution amplifier. The DA 216a is capable of providing sixteen discrete balanced outputs from one or two balanced mic-level or line-level inputs. The level of each output is individually adjusted via one of the sixteen screwdriver Output Level controls on the front panel. Each output may be assigned to either or both inputs via front panel accessible slide switches. The Master A and B Level controls affect the overall level of each input. In other words, they allow all assigned outputs to be turned up or down at once. LEDs indicate an Overload (OL) at either the inputs or at the internal gain stages. Each input is set to either Mic or Line level via the rear panel Input Pad pushbutton. The Input Gain pushbutton switches provide a microphone input with +60 or +40 dB of gain, or a line input with +20 or 0 dB of gain. With Input Gain, Master Levels and Output Levels, any reasonable input signal may be adjusted to a nominal +4 dBu and still have 17 dB of headroom. The Phantom Power switch provides +15 VDC for condenser microphones. Any input assigned to line-level has this phantom voltage turned off automatically. A rear-panel LED indicates when the Phantom Power is engaged. Each output stage incorporates a high-current balanced output line driver for driving long lines with optimal performance. |
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Rane HC6 Headphone Amplifier $379 Rane HC6 Headphone Amplifier The Rane HC 6 is one of the most indispensable products in today’s audio industry. Featuring six stereo headphone amplifiers, the HC 6 performs a number of necessary tasks, not all of which are headphone related. The HC 6 provides Master stereo Inputs which can be used to drive any or all of the 6 stereo headphone amplifiers. A Mono switch is provided on the front panel to drive both channels of all 6 amplifiers from a common mono source. Six individual unbalanced stereo Inputs are available to drive any individual amplifier from a separate stereo source. These Inputs can be converted to mono balanced Inputs through internal jumpers if required. Outputs for all six channels are provided on the front panel and on the rear panel so that headphones may be connected on either side based on the requirements of a given installation. Two pairs of headphones may be driven from each channel, one pair connected to the front and one to the rear. The HC 6 is capable of delivering up to 450 milliwatts into headphones with rated impedances between 32-600 ohms. The precise amount of power depends on the exact impedance of the headphone in use and the number of headphones connected to the unit. Under most conditions, the HC 6 produces sound pressure levels in excess of 120 dB. This level is more than adequate for most listeners. See “Understanding Headphone Power Requirements”, with an output listing of currently available headphones. |
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Squier SE Special/SP-10 Amplifier $230 Squier SE Special/SP-10 Amplifier Squier SE Special/SP-10 Amplifier Description: Includes: Squier SE Special, gig bag, Squier SP-10 amplifier, tuner,picks, strap, cable, stereo headphones and instructional DVD. Available in Black (X06), Sunburst (X32) and Arctic White (X80). Squier SE Special/SP-10 Amplifier Specifications: Model Name SE Special / Squier SP-10 Amp Model Number 030-1600-(Color#) Series SE 100 Series Colors (006) Black, (032) Sunburst, (080) Arctic White, (Polyurethane Finish) Body Agathis Neck Maple, C-Shape, (Polyurethane Finish) Fingerboard Rosewood, 9.5″ Radius (241 mm) No. of Frets 22 Medium Jumbo Pickups 3 Single-Coil Pickups Controls Master Volume, Tone 1. (Neck Pickup), Tone 2. (Middle Pickup) Pickup Switching 5-Position Blade: Position 1. Bridge Pickup Position 2. Bridge and Middle Pickup Position 3. Middle Pickup Position 4. Middle and Neck Pickup Position 5. Neck Pickup Bridge Synchronous Tremolo Machine Heads Die-Cast Tuners Hardware Chrome Pickguard 3-Ply White Pearloid on (006) Black, (080) Arctic White; 3-Ply Red Shell (032) Sunburst Scale Length 25.5″ (648 mm) Width at Nut 1.650″ (42 mm) Unique Features Dot Position Inlays Strings Fender Super 250L, (.009 to .042) Nickel Plated Steel p/n 073-0250-003 Accessories The SE Special Set Includes: Squier SE Special Guitar, Squier SP-10 Guitar Amplifier, Stereo Headphones, Instructional DVD, Cable, Electronic Tuner, Gig Bag, Guitar Strap, Pick Sampler Introduced 4/2007 Notice Product Prices, Features, Specifications and Availability Are Subject To Change Without Notice Get your Squier SE Special/SP-10 Amplifier today! |
