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What's the difference between integrated amplifier and power amplifier?

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An integrated amp has the Pre-amplifier built in ( Volume and tone controls)
A power amp has no tone controls and no pre-amp section

Posted on Sep 01, 2010


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Why won't my MA120 fast act amplifier turn on?

A pre-amplifier allows a range of components with different output levels to connect to an amplifier. Usually one is used to allow a low-level magnetic phono cartridge to be used with the line-level input of an amplifier. These used to be separate units; now integrated amplifiers combine control function with amplifying low-level signals. They also provide tone, volume and balance control.

Jul 04, 2014 | Audio Players & Recorders

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Integrated amplifier for Mordaunt-Short Avant 908i

Use an amplifier with NO MORE than 150 Watts per channel or you be buying new speakers. At this power level don't expect booming bass boost without damaging the speakers. The Rotel generates 130 per side which is very near the safe maximum for those speakers... and the specs look good. If you are not satified with the sound, the speakers are LIKELY the problem. Look at getting good commercial speaakers instead of CONSUMER grade speakers. Go to a music store dealing with bands and musicians and view the products they have to offer. Consumer speakers often fail when people turn up too much bass. At high listening levels hearing damage can result.

Aug 02, 2012 | Audio Players & Recorders

1 Answer

Kenwood Stereo integrated amplifier A-58

hi i have bought kenwood hi fi with following parts -
integrated amplifier - A-58
cd player - DP-M58
stereo receiver - T-58L
twincassette player - X-58
turntable - P-38
but I can't get owner manuals from anywhere. Can you help me with it please ?

Jun 29, 2012 | Kenwood Audio Players & Recorders

1 Answer

No audio output. muffled output from Phones jack

you need to check the power supply of the amplifier with the help of a voltmeter. if that is OK the power amplifier IC(integrated circuit) is gone bad, see for overheating of IC.

Sep 26, 2011 | Roland Ac60 Acoustic Chorus Guitar...

1 Answer

What is full meaning of the following codes in design and constructing an inverter-NE55,CD4013,JRC455,A733,IRFP150,1N4007,C945.

These numbers are the identification of some electronic devices that probably are being used in the inverter's circuit:

CD4013 - Dual D Flip-Flop integrated circuit
1N4007 - 1 A rectifier diode
IRFP150 - power MOSFET
A733 (2SA722) - PNP silicon transistor (low frequency amplifier)
C945 (2SC945) - NPN silicon transistor (low speed switching)

I could not find the devices marked JRC455 and NE55 - maybe they were not correctly marked, but there are some devices which have similar designations: JRC4559 is a dual operational amplifier integrated circuit and the NE555 is a time/oscillator integrated circuit.

You can download their datasheets from

Hope this information can be useful!

Mar 09, 2011 | Electronics - Others

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AVR 684 was working normally then shut off with rapidly flashing red led. Have allowed to cool overnight, tried different power sources, disconnected speakers etc, etc. Any ideas?

The unit more than likely has a fault in the power supply or the output stage. Common switching power supply problems are the FETs used for switching fail or the PWM generator fails. Output circuits can be configured many different ways. The trend these days is to use integrated high power amplifiers for each channel instead of discrete push pull amplifier stages.

Feb 06, 2010 | Denon AVR-684 6.1 Channels Receiver

1 Answer

Stereo integrated amplifier a30, turns on some times

A few things to check:

- a bad power cord or connector to the unit on the cord (if any), bad power connector on the unit (if any) or bad connector soldering on the circuit board (replace cord or resolder/replace connector if necessary)

- main power switch could have dirty contacts or some damage (needs to be cleaned or replaced)

- an electrolytic filter capacitor (any of them) could be dried out, blown (bulged at the top), badly soldered or otherwise faulty (should be replaced if faulty and resoldered if there is a loose solder joint)

- a connector (any of them) could be loosely plugged, oxydized or have bad solder joints on any pins (connections should be checked, dirty contacts cleaned, loosely soldered pins resoldered)

- any other components could be poorly soldered or damaged (resolder or replace, as necessary - might require technical service to establish which components are bad, if any)

Note that the problem may be any of the above, a combination of any of the above or something entirely different, i'm just pointing to some possible causes/solutions.

Hope you can fix it.



Sep 21, 2009 | Audio Players & Recorders

1 Answer

Combining an integrated receiver and an external amp.

yes, you are "forgoing the 100 Watts of my integrated receiver and now just using the 100 watts from the external amp"

Jun 03, 2007 | Home Theater Direct MA-1235 Amplifier

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