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What is this ? On the back of Power Acoustik 500w subwoofer


Sub-woofers work on a low hertz as per audio. You have a built-in amp that has a crossover that separates frequencies under 100 Hz. Typical Hertz range is between 20-60. Since you have a built-in amp the black rectangle is a heat sink which helps to dissipate heat away from the internal components and also seconds as a cover to keep debris and other foreign objects from getting to the amp and burning it out.

Hope this helps.

Feb 19, 2016 | Power Acoustik Car Audio & Video

1 Answer

Is hertz the same as amps?


No, hertz (Hz) is the name for "cycles per second". Normal AC power (in the USA) is 60 hertz or 60 cycles per second. 1 kiloherz (KHz) = 1000 cycles per second. 1 megahertz (MHz) = 1,000,000 cycles per second. Amps is the measurement of current flowing through a device or circuit. a 100 watt light bulb pulls about 0.9 amps. A toaster or microwave oven pulls about 15 amps.

Sep 11, 2014 | Microwave Ovens

1 Answer

I have a heart freedom20 inv. batt. chger that runs at 120 hertz .It does everything (charges switches etc.just fine bu the ac output is at 120 hertz instead of 60.


First check the voltage, if the voltage is good then check the hertz with a different meter because if the hertz went up to 120 everything onboard should have burnt out. The hertz works on the low voltage side of 120vac. before going to a repair shop first check the hertz meter. Good luck.

Jan 25, 2011 | Xantrex Technology Heart Freedom 20 12...

1 Answer

My screen says auto configure when on Please Help pschubert61@hotmail.com


It's perfectly "normal" -- your LCD monitor is adjusting itself, automatically, to the output from your computer's video-card
(e.g., 800 by 600 by 60 Hertz).

Restart your computer in "Safe Mode", and reset the display-resolution to 800 by 600 by 60 Hertz. Then, restart,
and then everything will be OK. When it is, try to increase the resolution, incrementally.

Aug 30, 2010 | Acer 22" X223w LCD Monitor

1 Answer

Windows XP on my Gateway PC will not accept Viewsonic Widescreen VA1912wSeries . My HP PC broke & I moved the montor to the Gateway. The HP had the same Windows XP system.


Reboot the computer into safemode. to do this tap F8 after the logo screen for gateway goes away. select Safe Mode.

Right click the desktop and click properties. in this window click settings. change the resolution to 1024x768.

click the advanced button. click monitor tab then set the screen refresh rate to 60 hertz.

if the monitor is compatible it will be able to be displayed. else try 1440x900 and 60Hertz for the settings

Feb 12, 2010 | ViewSonic VX2035WM LCD Monitor

1 Answer

I need an owner's manuel for a Pioneer stereo power amp SPEC-4. I have a part # ARB-235. I think this amp is a product of the 1970's. Where would I be able to get my hands on the operating instructions?...


You can register with hifiengine.com andfind it and the service manual.

There really isn't a lot to a power amp to be operated. This one differs from most in that it has an input level control and VU meters.

From http://images.google.com/imgres?imgurl=http://www.incomesixdigits.com/spec4/spec4a.jpg&imgrefurl=http://www.incomesixdigits.com/spec4/&usg=__WbFLwPqHXjFHe_P2BCKyTT9CxQY=&h=652&w=1156&sz=526&hl=en&start=2&um=1&itbs=1&tbnid=5SVKh2leUGWXmM:&tbnh=85&tbnw=150&prev=/images%3Fq%3Dpioneer%2Bspec%2B4%26hl%3Den%26rlz%3D1R2ADFA_enUS360%26sa%3DX%26um%3D1


Dynamic 150 + 150 Watts Power Output, Generous High-power Design
The Spec-4 employs DC construction which excludes capacitors from the NFB circuits and uses a dual transistor differential amplifier with a current mirror circuit in the 1st stage. This provides a stable operation and also high gain over a wide frequency range. The pre-driver stage is a class A amplifier circuit with a regulated current circuit for the load. This makes for high-gain amplification with superior linearity. Furthermore, there is an overdrive limiter and power limiter circuit which is designed to protect the power transistors and make for added reliability.
The power stage employs a 3-stage Darlington pure complementary parallel SEPP circuit.
The SPEC-4 delivers Continuous Power Output of 150 watts per channel, min. RMS, at 8 ohms from 20 Hertz to 20,000 Hertz with no more than 0.01% total harmonic distortion.

Completely Independent and Perfectly Stable Left / Right Power Supplies
The mighty power supplies are completely separated for the left and right channels. Also, each channel is provided with two 22,000uF large-capacity electrolytic capacitors and large transistors with a superior regulation. They achieve outstanding channel separation and a clear, powerful reproduced sound, in addition to the wide frequency response. There is a built-in surge killer circuit to suppress inrush currents from the power transformers and high currents which charge the electrolytic capacitors. This circuit ensures that none of the parts are affected by these adverse currents.
Protective Circuits Composed of Fast-response Relays and Electronic Circuits
Each channel is protected by a DC and over current detection relay circuit. In the event of the speaker terminal shorting due to poor connections or when DC current is generated in the output, the output circuit is immediately disengaged and the speakers and transistors are safeguarded against any possible damage. The protective circuits also function as muting circuits when the power switch is turned on and off.
Peak Level Meters with Outstanding Waveform Response
This power amplifier incorporates logarithmic compression peak meters with a wide scale (-40 -+3dB). With 8-ohm speakers, they allow the output to be read out from 0.01W to 300W. Moreover, the meters feature a fast response for peak signal indication. In addition to the peak output reading, it is easy to interpret the dynamic margin with respect to the SPEC-4’s clipping level.
Input Level Controls with dB Calibration
The SPEC-4 is equipped with input level controls with direct readout attenuation values (-dB). These can be used to continuously adjust the input levels for each channel in accordance with the rated output voltage of the preamplifier. In this way, the SPEC-4 can perform the proper gain control according to the preamplifier’s output level. The preamplifier will thus be used in the condition possible for the best S-N ratio and distortion characteristics.
Stylishly Professional Front Panel Design
Just as you would expect from a sophisticated system, the SPEC-4’s front panel is professionally designed with the large level meters in the center. Also. The front panel’s dimensions allow the model to be mounted in an EIA standard rack, just like real professional-use amplifiers.
SPECIFICATIONS
ICs………………………………........................................2
Transistors………………………………...........................61
Diodes……………………………….................................62
Power Amplifier
Circuitry………………………………Current mirror loaded differential Amplifier
3 stage darlington parallel push-pull
Direct-coupled OCL. (DC amplifier construction)
Continuous Power Output of 150 watts * per channel, min. RMS, at 8 ohms from 20 Hertz to 20,000 Hertz with no more than 0.01% total harmonic distortion, or 180 watts per channel at 4 ohms from 20 Hertz to 20,000 Hertz with no more than 0.03% total harmonic distortion.
Total Harmonic Distortion (20 Hertz to 20,000 Hertz, 8 ohms)
Continuous rated power output………………………………................................0.01%
75 watts per channel power output……………………………….......................... 0.01%
1 watt per channel power output……………………………….............................0.01%
Intermodulation Distortion (50 Hertz to 7,000 Hertz = 4:1, 8 ohms)
Continuous rated power output………………………………................................0.01%
75 watts per channel power output……………………………….........................0.005%
1 watt per channel power output………………………………........................... 0.005%
Frequency Response………………………………...............5 Hertz to 100 kHertz +0/1 dB
Input (Sensitivity / impedance)……………………………............................1V/50k ohms
Output
Speaker……………………………….................................................4 ohms to 16 ohms
Damping Factor (20 Hertz to 20,000 Hertz, 8 ohms……………………………….........100
Hum and Noise (IHF, short circuited, A network………………………………........11 5dB
Miscellaneous
Power Requirements………………………………...................................AC 120V 60 Hertz
Power Consumption………………………………..........................................760 watts (UL)
Dimensions………………………………..............................480(W) x 187(H) x 445 (D)mm
18-7/8 x 7-3/8 x 17-7/16 in.

Feb 10, 2010 | Audio Players & Recorders

1 Answer

We have a super holeshooter (cat.#1854-1)120v AC/DC. What hertz will this machine operate on? The brand is Milwaukee.


Hello. American made tools are made to operate on 60 hertz, but they will operate on 50 hertz. Given a choice, such as when operating off of a generator, select 60 hertz.

Dec 02, 2009 | Drills

1 Answer

Monitor turns on for a while


sounds like your refresh rate is too high for the monitor. try this:
after bios check press F8 immediately, then select "safe mood" and click no if ask if you want to restore. then set your display settings. righ-click on your desktop, click properties, click "settings" tab, set your "screen resolution" to 800 by 600 (safest resolution), click "advanced" button then click "monitor" tab and select 60 Hertz for LCD and 75 Hertz for CRT Monitor. Click apply and restart your computer.

Apr 09, 2009 | Computers & Internet

4 Answers

I put my Hertz way to high and my monitor isnt working


turns out all i had to do was restart the computer in video mode aka VGD or VGA mode
you get to this by restarting your computer and pressing F8 a bunch of times till you get the safe mode menu and select VGD mode and youll be able to fix ur problem from there

Apr 09, 2009 | Fuji FP-988D 19" Flat Panel LCD Monitor

1 Answer

Input Not Supported


You need to go into display settings, click advanced, and then click the monitor tab, and change the hertz setting to 60 HZ

Aug 07, 2008 | Acer AL1916W 19" LCD Monitor

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