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I need the owner's manual for Musical Fidelity Typhoon Preamp & Power amp. I NEED TO KNOW THE BRIDGING CONFIGURATION

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6ya6ya
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Posted on Jan 02, 2017

jontubaman
  • 41 Answers

SOURCE: Where to get hold of an owners manual

The manual can be found at http://www.partsexpress.com/PDF/267-698.pdf I hope it has the information you're looking for.

Posted on Jul 28, 2007

  • 105 Answers

SOURCE: Technics 1200 turntable - no

Technics 1200 - if the mains cord connectors and fuses are ok - it could be the power switch - when you rotate the switch do any lights come on? If it is just no rotation of the turntable platter then it could be the motor controller IC.

There is an internal regulator - often the associated zener and transistor fail.

Please rate this as a genuine cure - I know these inside out and with a bit more information I can give you a solution.

Posted on Mar 19, 2008

  • 1 Answer

SOURCE: Replacing a Blaupunkt Reno with Florida

How can i take my carradio out, and replace it

Posted on Feb 26, 2009

etirbynnor
  • 655 Answers

SOURCE: two terminals? bridging theory?

Hello again jm129852,

Having two power and ground terminals allows you to run two smaller wires instead of one big one. It's a convenience. No, you do not have to use them both. They are connected together inside. Yes, you should still use a single fused battery lead. Connect the big wire and fuse holder to the battery and to a distribution block and run the smaller wires from the output side of the distribution block.

When you connect the outputs of a two channel amp to two separate speakers, each speaker gets the power produced by it's channel only. If you are using only one speaker, and the amp is rated to operate bridged, then the speaker will receive the power from both channels, typically twice as much. You do need to be careful when using bridged mode because many amps will only operate safely at a higher impedance when bridged. For example, when operated with both channels connected to separate speakers (not bridged), it may be stable to 2 ohms. But when you connect both channels together (bridged), it is only stable to 4 ohms. Usually, the specifications will tell you the lowest impedance at which the amp should be operated. The specifications for the current RF Punch 500.2 are like this: 125 watts X 2 at 4 ohms; 250 watts X 2 at 2 ohms; 500 watts X 1 bridged at 4 ohms (4 ohm stable in bridged mode). You would NOT want to connect two 4 ohm subs in parallel to this amp in bridged mode. It would result in a final 2 ohm load and the amp would overheat and fail. One 4 ohm sub would be OK, and it would receive the full 500 watts as stated in the specifications. You could connect four 4 ohm subs, two each in parallel to each channel, and the 2 ohm loads on each channel would be OK. Or you could series two of them together for an 8 ohm load, do the same with the other two, and then parallel the two 8 ohm loads for a final impedance of 4 ohms and connect them into the bridged terminals. With DVC subs the connection possibilities get more complex. There are many good impedance calculators online that can help you determine the best wiring solution for various amp/sub combinations. I like the one above at the12v.com web site. Rockford-Fosgate also has one which allow you to select the a number of subs (up to 4), their voice coil configuration (single or dual), and the voice coil impedance. The RF calculator then shows you what configurations are available and what your final load impedance will be.

Hope this helps.

Posted on Apr 28, 2009

  • 2239 Answers

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A machine of that age i would run on a 25-1 fuel oil mix with good quaility two stroke oil.

Posted on Feb 28, 2011

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First is to check to make sure the power supply is putting out enough power.

From your description, it sounds like the classic signal "clipping" situation.

Since I tend to work from experience repairing a wide range of things, and I am not finding any references to your amp, not even in Russian sources, not even a picture, I have to make some assumptions for the moment, but this will help locate the problem.

Solder some test leads to an impedance matching transformer and the other winding to a plug that will fit your good headphones.

With chassis underside exposed, power up the amp, and apply a song you know well to the input. Use the test leads to check the 4558 IC's that are most likely to be found in the preamp stage(s) of the amp. and follow down the audio chain until you reach the power hybrids. If you happen to have the discrete transistors, those are better to work with and much easier to test.

If I am testing an amp in this way, I am listening for a dead spot, or a spot where the signal is very distorted. Being careful not to touch the power buss. Simply putting a test clip on one lead and attaching it to chassis ground is the easiest and fastest way to run through an amp.

if I am checking discrete transistors, I am just checking at the base lead of each one, or the gate if it is a FET until I find a distorted stage.

If you have power hybrid IC's, check at the website of the manufacturer of the IC for data sheets on that chip. Use those as a guide for checking voltages for the hybrid, as well as to help potential shorted components such as a capacitor or a resistor that may have failed.

If I know more details of the chips the amp uses, discrete transistors, or even if it happens to be a tube amp I can be much more specific.
Other things to check that are not always apparent- make sure there is a +15 colt supply and a -15 volt supply with respect to chassis ground when dealing with 4558 amp chips.

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http://www.canuckaudiomart.com/view_images.php?cat=Preamplifiers&catnick=preamplifiers&cfid=193374&image_id=1831037

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