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amplifier - speaker wattage compatibility

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Old 14th April 2012, 01:41 PM
 
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amplifier - speaker wattage compatibility


I AM FROM KOLKATA.
I want to buy a Denon Integrated amplifier with Jamo speakrs. Unfortunately in kolkata these two are not available in a single shop. While Pro fx sells Denon amplifier, M/s Promises sells Jamo speakers. I have tried a lot to understand from the internet as to what should be the Integrated Amplifier's power/wattage per speaker for a Pair of speakers of a particular power/wattage and found contradictory views. While one view says that the Integrated Amplifier's power/wattage per speaker should be MORE than the powe/wattage of the speakers, the other view says that the Integrated Amplifier's power/wattage per speaker should be LESS than the powe/wattage of the speakers. Hence, i am in great confusion, speacially because while the power/wattage of Denon amplifiers are indicated at 4 & 8 Ohms, the powe/wattage of Jamo speakers are indicated in 6 Ohms.
1.Can any body help me on the issue and give some suugestion on the issue.

In fact I want to buy Denon PMA 710 AE Integrated amplifier ( 85 watt/channel at 4 ohms and 50 watts/channel at 8 ohms) and any of the following Jamo Speakers-
1. Jamo C 605 (Floor Standing)
2. Jamo S 606 (Floor Standing)
3. Jamo S 426 (Floor Standing)
4. Jamo S 428 (Floor Standing)
5. Jamo s 418 (Floor Standing)

OR
1. Jamo C 603 (Book shelf)
2. Jamo S 602
3. Jamo S 603

Can any one suggest which of the above models of Jamo Speaker I can go for with Denon PMA 710 AE ?
G MITRA
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  #2  
Old 16th April 2012, 11:07 PM
 
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Re: amplifier - speaker wattage compatibility

Quote:
Originally Posted by gmitra View Post
I AM FROM KOLKATA.
I want to buy a Denon Integrated amplifier with Jamo speakrs. Unfortunately in kolkata these two are not available in a single shop. While Pro fx sells Denon amplifier, M/s Promises sells Jamo speakers. I have tried a lot to understand from the internet as to what should be the Integrated Amplifier's power/wattage per speaker for a Pair of speakers of a particular power/wattage and found contradictory views. While one view says that the Integrated Amplifier's power/wattage per speaker should be MORE than the powe/wattage of the speakers, the other view says that the Integrated Amplifier's power/wattage per speaker should be LESS than the powe/wattage of the speakers. Hence, i am in great confusion, speacially because while the power/wattage of Denon amplifiers are indicated at 4 & 8 Ohms, the powe/wattage of Jamo speakers are indicated in 6 Ohms.
1.Can any body help me on the issue and give some suugestion on the issue.

In fact I want to buy Denon PMA 710 AE Integrated amplifier ( 85 watt/channel at 4 ohms and 50 watts/channel at 8 ohms) and any of the following Jamo Speakers-
1. Jamo C 605 (Floor Standing)
2. Jamo S 606 (Floor Standing)
3. Jamo S 426 (Floor Standing)
4. Jamo S 428 (Floor Standing)
5. Jamo s 418 (Floor Standing)

OR
1. Jamo C 603 (Book shelf)
2. Jamo S 602
3. Jamo S 603

Can any one suggest which of the above models of Jamo Speaker I can go for with Denon PMA 710 AE ?
G MITRA
Amp should be higher wattage than printed on speakers (and lesser impedance).
This allows amp to deliver un-distorted signal.
Distortion sounds bad, as well as places great risk on tweeter (damage).
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Old 17th April 2012, 07:47 AM
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Re: amplifier - speaker wattage compatibility

Stay away from each and every one of those Jamo models. Look at Wharfedale or Cambridge audio instead.
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Old 17th April 2012, 09:46 AM
 
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Re: amplifier - speaker wattage compatibility

Corelement theek bolechey (Cor has said right!)
He is the Jamo King in here .... so, his suggestion as far as Jamo is concerned, is to be taken dead seriously.
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Old 17th April 2012, 11:16 AM
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Re: amplifier - speaker wattage compatibility

^^ So you are a Bengali too

@gmitra - Why don't you audition Polk Audio there in ProFX. Are you avoiding Polk for any reason? Those Profx guys are good and knowledgeable, ask them that you want to audition a setup of your budget. Polk goes well with Denon.
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Old 17th April 2012, 11:21 AM
 
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Re: amplifier - speaker wattage compatibility

Quote:
Originally Posted by gmitra View Post
I AM FROM KOLKATA.
I want to buy a Denon Integrated amplifier with Jamo speakrs. Unfortunately in kolkata these two are not available in a single shop. While Pro fx sells Denon amplifier, M/s Promises sells Jamo speakers. I have tried a lot to understand from the internet as to what should be the Integrated Amplifier's power/wattage per speaker for a Pair of speakers of a particular power/wattage and found contradictory views. While one view says that the Integrated Amplifier's power/wattage per speaker should be MORE than the powe/wattage of the speakers, the other view says that the Integrated Amplifier's power/wattage per speaker should be LESS than the powe/wattage of the speakers. Hence, i am in great confusion, speacially because while the power/wattage of Denon amplifiers are indicated at 4 & 8 Ohms, the powe/wattage of Jamo speakers are indicated in 6 Ohms.
1.Can any body help me on the issue and give some suugestion on the issue.

In fact I want to buy Denon PMA 710 AE Integrated amplifier ( 85 watt/channel at 4 ohms and 50 watts/channel at 8 ohms) and any of the following Jamo Speakers-
1. Jamo C 605 (Floor Standing)
2. Jamo S 606 (Floor Standing)
3. Jamo S 426 (Floor Standing)
4. Jamo S 428 (Floor Standing)
5. Jamo s 418 (Floor Standing)

OR
1. Jamo C 603 (Book shelf)
2. Jamo S 602
3. Jamo S 603

Can any one suggest which of the above models of Jamo Speaker I can go for with Denon PMA 710 AE ?
G MITRA

My suggestion would be, forget jamo and audition wharfedale 9.6 or tannoy
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Old 17th April 2012, 11:23 AM
 
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Re: amplifier - speaker wattage compatibility

Quote:
Originally Posted by alpha1 View Post
Amp should be higher wattage than printed on speakers (and lesser impedance).
This allows amp to deliver un-distorted signal.
Distortion sounds bad, as well as places great risk on tweeter (damage).
I don't understand why amp should be rated high than the speaker, generally viceversa as it will blow the speakers off.

a low watt amp+spk with high impedance(8ohm) will be perfect.
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Old 17th April 2012, 12:53 PM
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Re: amplifier - speaker wattage compatibility

There is no hard rule that an amp has to be rated higher than speaker

This is how it goes

1. There are two types of mainstream speakers:
a> Magnet based
b> Electrostatic baed

2. Electrostatics have fixed impedance. Magnet based coil/cone drivers do not.

3. Impedance is the electrical characteristic of a speaker that restricts or impedes the flow of power. It is an Attemptto quantify the difficulty a receiver or amplifier will have in driving a speaker. The standard of measurement for resistance and impedance is Ohm. The symbol for Ohm is the Greek letter omega (Ω). One ohm is the resistance between two points of a conductor that requires one volt of potential to produce one ampere of current across its terminals. In the process, one watt of energy is converted into heat.

In lay man's terms, Impedance is a APPROXIMATE measure of the approximate minimal power each driver hungers for to produce sound.
So for example, your speaker may say it's 8ohms overall but the tweeter's individual specs have 6ohms written on it. Then what's the point of saying your speaker is 8ohms if the tweeter has 6ohms written on it. ?

Similarly a good 4ohm speaker might have 6ohm midrange driver and 4ohm tweeter but the speaker model has 4ohm written overall. Whats the point?

The answer : It's an dynamic approximate measure for magnet based speakers. It's not a fixed measure.

4. A good magnet based speaker thats 8ohms may demand even dip to 3 ohms depending on what's being played if it's truly efficient <- THIS is why you may need a higher wattage AMP for high end speakers, and just how high is found out by the point below.


5. On the rear of speakers youll find "short term" and "long term" written. The smaller value tells you what's it's average requirement, the bigger value will say how much it can demand for certain short bursts.

So for example take this


Notice short term 170
Long term 130

Mind you these values are approximate as well however they give you a an idea of just how much juice your amp needs to have ready at all times and this is also not measurable because manufacturers write whatever number they want, the best measure is our ears and physical SPL pressure.


Now let me throw you a curve ball

Speaker 1
4 Ohms
93 Sensitivity
130 watts

Speaker 2
8ohms
86 Sensitivity
300 Watts

Speaker 3
6ohms
89 Sensitivity
150 Watts

What do you think the results will be if you connected all of them to the same amp x 3
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Old 17th April 2012, 12:58 PM
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Re: amplifier - speaker wattage compatibility

If you want the best performance, the amplifier o/p wattage should be higher or nearly equal to the speaker wattage. This will avoid distortion and will not harm ur speaker & amplifier. The other way around is not true. You can use Bi-amping for excellent performance. Also make sure to use speaker impedance that is supported by ur amplifier. Its mentioned at the back. If u use higher impedance speaker than the supporting amp, it will damage ur amplifier slowly.

Dont go for JAMO. Go for paradigm, Klipsch, quad, mirrage, polk with Onkyo/Denon..if u have the budget.
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Old 17th April 2012, 01:13 PM
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Thumbs up Re: amplifier - speaker wattage compatibility

Quote:
Originally Posted by gmitra View Post
I AM FROM KOLKATA.
I want to buy a Denon Integrated amplifier with Jamo speakrs. Unfortunately in kolkata these two are not available in a single shop. While Pro fx sells Denon amplifier, M/s Promises sells Jamo speakers. I have tried a lot to understand from the internet as to what should be the Integrated Amplifier's power/wattage per speaker for a Pair of speakers of a particular power/wattage and found contradictory views. While one view says that the Integrated Amplifier's power/wattage per speaker should be MORE than the powe/wattage of the speakers, the other view says that the Integrated Amplifier's power/wattage per speaker should be LESS than the powe/wattage of the speakers. Hence, i am in great confusion, speacially because while the power/wattage of Denon amplifiers are indicated at 4 & 8 Ohms, the powe/wattage of Jamo speakers are indicated in 6 Ohms.
1.Can any body help me on the issue and give some suugestion on the issue.

In fact I want to buy Denon PMA 710 AE Integrated amplifier ( 85 watt/channel at 4 ohms and 50 watts/channel at 8 ohms) and any of the following Jamo Speakers-
1. Jamo C 605 (Floor Standing)
2. Jamo S 606 (Floor Standing)
3. Jamo S 426 (Floor Standing)
4. Jamo S 428 (Floor Standing)
5. Jamo s 418 (Floor Standing)

OR
1. Jamo C 603 (Book shelf)
2. Jamo S 602
3. Jamo S 603

Can any one suggest which of the above models of Jamo Speaker I can go for with Denon PMA 710 AE ?
G MITRA
Hi,
It will be real worthy if you audition Denon with Polk which is available in Pro-Fx. Believe me, you will never repent with this decision, they are made for each other. Just have a trial.


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