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Combining an integrated receiver and an external amp.

Hello; If I have a 100 Watt Integrated Receiver with Pre-outs...if I use the pre-outs and connect to another 100 watt external Amplifier does that basically create 200 watts of power driving my speakers or am I forgoing the 100 Watts of my integrated receiver and now just using the 100 watts from the external essence doing nothing for me. thanks. Nick

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Re: 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"

Posted on Jun 04, 2007

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Unfortunately, there is not. You risk over driving the amp if you do that

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How do I hook up a stereo reciver to the technics su-g91

I assume you want to use the SU-G91 as a power amplifier to drive your speakers. If your receiver has connections for inserting an equalizer (may be labeled pre-amp output and power amp input), remove the jumpers between the pre-amp and the power amp, then run cables from the pre-amp to the SU-G91 inputs. You can have an equalizer between the receiver and the integrated amplifier.
If this is not available, use the recording output (for a tape recorder on older receivers). Note that the volume control on the receiver will be bypassed with this connection.

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HI, Can the Cambridge Audio 640a integrated amp be used as a preamp if I buy a separate power amp.

Of course, just run an audio RCA pair out from the Pre Out to your next amp and any input. All control for volume, tone, etc will remain with the 640A.

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

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Low volume through amplifier

Turntables generate a very low signal. Phono inputs on receivers containa pre-amp section to boost the signal to "line level" or the same level as other audio devices. I would suspect that you need to add that pre-amp section. Phono preamps are available for around $20 or so and are inserted between the turntable and the standard audio input on the receiver or amp.

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How manny watts per channel??

I'm guessing the 200w are the Speakers maximum input, right?
Is the sub passive or active(=integrated Amp)?

If it's a passive sub:
If it's a 2-Channel Amplifier, you're talking about, you won't be able to connect all 3 - unless you can live with one speaker being significantly louder than the other or your amplifier going up in smoke...

As to the power required, if it's 250W PER CHANNEL the amp will blow your speakers, if it's 250W combined you may not be able to drive them to their absolute limit but they will be loud enough (they probably reach their db-limit with less than 200w but if they reach it with 200, you'll only get ~6db less than that with 125w per channel)

The Watt-numbers on (passive) speakers only tell you how much they can take before they are damaged, the relevant numbers for your problem are the efficiency (the unit is db/W or db/2,83V) and the maximum db-level (most floorstands can produce between 100 and 110 db at one meter distance)

If your speaker produces i.e. 87db/W at 1 meter distance (which is the standard measuring distance), it will produce ~97db at 10W, ~107 at 100W, etc. - unless it reaches it's limit before that. Most speakers can take a lot more power, than they need to reach their limit but they won't get any louder if you keep turning up the volume beyond that (they'll probably produce more distortions though, so don't)

As to the sub:
if it's passive, you'll need another amp (there are special amp-modules for subs, but any amp with enough power will do)

if it's active, you can connect it to the sub-out of your preamp (I'm guessing the PA Amp you mention is a Main Amp, not an integrated one) or your integrated amp via cinch (a tape-out works too)

OR you can connect it to the speaker outputs and than connect the speakers to the sub - in that case the sub is still NOT driven by your main amp but you can use it's crossover to separate low frequencies (--> SUB only) form higher frequencies (--> SPEAKERS only).

Most active subs can be connected both ways, if yours can't your stuck with one.

Rarely there is a third way, which only works if your sub supports it and if you either have seperate Pre- and Main-Amp or if your integrated amp has a Pre-Out and a Main-In (in that case in can be split into preamp and main amp)

IF you want to use your subs Crossover (which is good idea, provided it has one), you'll have to connect it between Amp and Speakers (works with allmost all active subs) or between preamp and main amp (works only with a few)

I hope this is helpful

Jan (Hamburg, Federal Republic of Krautistan)

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I have 1 center channel pre-out on back of my kenwood receiver. how do i hook it to the inputs on onkyo m-282 amp and then to center channel speaker?

Unfortunately can't connect it that way. The pre out is only meant to go directly into an amplifier that has all of the same inputs (front/rear, center and surround), not a standard receiver. (Pre amp to amp only, not pre amp to receiver) If your Onkyo doesn't have all the same inputs as your Kenwood preamp has outputs you will just use your standard left/right outputs from the Kenwood to your Onkyo input (CD, Tape, Phono,DVD etc) then use the outputs (front/rear, center and surround) from your Onkyo receiver and connect directly to your speakers..

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Stereo connection

Hi spanky

Sorry for the delays in getting back to you. Been busy here this week.

OK. to connect the 2275 to the 1152,there are 2 ways of going about this.

You can plug the pre- out of the 2275 to the power amp-in of the 1152. In doing this you are using the power amp section of the 1152 and the preamp functions of the 2275. Your other gear like CD player, tape deck and so on also plug into the 2275.

the other(better) way is to plug the pre-out of the 2275 into the tuner inputs of the 1152, leaving the volume at about 40% on the 2275 and use the 1152 as an integrated amp. This means you are using the 2275 as a tuner only. When you do this, you will need to use an RCA lead to jumper the pre-out/poweramp-in connections on the back of the 1152, and the 2275 ... L to L and R to R respectively.

I am still wondering why you want to use 2 integrated amps (each having a preamp and a poweramp section) The only real benefit the 2275 brings to your system will be tuner functions. You could just get a tuner and run the 1152 to be an ideal rig.

Let me know what your ideal setup you are wishing to build would have. Speakers, other gear like CD, tape deck, etc.


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Jul 23, 2008 | Amplifiers & Preamps

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