what A B stereo amplifier means?

[xerefey]

Hi,

I'm in the middle to receive my Rotel RA-1570 integrated amplifier, but I have a big question on my mind the amplifier is described as AB what does this really means? Reading imanuals and forums it seems like I'm able to plug 4 speakers (let's say living room and garden) is this correct? By doing this do I keep sending 120 W per speaker? Do you know if somehow I'm able to turn on/off between zones? (Let's say that I want to have garden speaker's with sound but living room off).

Any comment is welcome.

Brgds

 

[Covenanter]

No it doesn't mean that. It is the type of circuitry in the amplifier. The 3 most common types are Class A, Class B and Class AB. The Wikipedia article is good:

http://en.wikipedia.org/wiki/Amplifier#Class_AB

Chris

 

[spiny norman]

Although in this case it does also mean just that, as the Rotel has two sets of speaker outputs, so two pairs of speakers can be connected.

Front-panel Speaker A and Speaker B selectors mean you could run speakers in two rooms, and choose whether to have either set playing, or both.

 

[Al ears]

Basically your is a Class AB amplifier to which you can attach 2 pairs of speakers that happen to be labelled A and B (could just as well be 1 and 2).

This being a nice facility if you should want massive great speaker cable runs into another room! 🙂

 

[xerefey]

Thank's all for your reply, looks like this new rotel is much better than what I expected, did any of you had chance to listen to it? Unfortunately I have not gotten any feedback about this new model.

So if connecting the 4 speakers echa of them will receive 120watts or the 120wpc will be share among the four speakers?

Brgds

 

[Al ears]

I wouldn't worry about what watts per channel your speakers will be getting as it will be unlikely to effect any volume you are likely to be playing them at.

I believe your amp is classified as 120 watts per channel - and it is a stereo amp. (I am not sure if you can run both pairs of speakers at the same time)

 

[spiny norman]

(I am not sure if you can run both pairs of speakers at the same time)

"The RA‑1570 has two sets of speaker outputs, labeled SPEAKER A and

SPEAKER B. The speaker outputs are controlled by the switch 7 on

the front panel and the buttons O on the remote control.

Speaker Selection

If only one set of speakers will be used at any given time, the speakers

may have an impedance as low as 4 ohms. If there are times when

both the A and B speakers will be used, all the speakers should have an

impedance of 8 ohms or more. Speaker impedance ratings are less than

precise. In practice, very few loudspeakers will present any problems for

the RA‑1570."

 

[spiny norman]

Multiple post

 

[spiny norman]

Multiple post – apologies

 

[davedotco]

(I am not sure if you can run both pairs of speakers at the same time)

"The RA‑1570 has two sets of speaker outputs, labeled SPEAKER A and

SPEAKER B. The speaker outputs are controlled by the switch 7 on

the front panel and the buttons O on the remote control.

Speaker Selection

If only one set of speakers will be used at any given time, the speakers

may have an impedance as low as 4 ohms. If there are times when

both the A and B speakers will be used, all the speakers should have an

impedance of 8 ohms or more. Speaker impedance ratings are less than

precise. In practice, very few loudspeakers will present any problems for

the RA‑1570."

Good solid advice.

The only thing I would add is that I would not use two pairs of known 4 ohm speakers (A + B) if i was going to really drive them hard, a party perhaps, otherwise as said above there should be no issues in normal use.

 

[spiny norman]

Good solid advice.

Is from Manuel. He learn it from a book.

 

[davedotco]

Good solid advice.

Is from Manuel. He learn it from a book.

Guessed as much, clearly translated from Spanish.

Doesn't give much advice on party planning though.

 

[spiny norman]

Doesn't give much advice on party planning though.

 

[davedotco]

Doesn't give much advice on party planning though.

I was hoping for some tapas recomendations actually.

And I can spill tea as well as anyone.......

 

[xerefey]

Thank you guys,

I really appreciatte your answers, just as an additional information currently the scope us to install a pair of CM1 B&W speakers with a ASW610 B&W sub (Living room), the plan is that in the future i might add a couple of Bose (Yes i know these are not the best speakers), however i´m just planning to use them for putting some music at my garden.

My feeling is that this mix should be morre than enought for the purposes i´m looking for, my main need is to really have a high fidelity system at living room and been able to switch among both rooms when necessary.

Make sense?

Saludos!