How much power is needed in Amp? - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 5 Old 07-12-2016, 10:35 PM - Thread Starter
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How much power is needed in Amp?

Dear all,
I am currently looking in integrated amplifier, but most of amps in my budget are only like 35watt-60watt. for example i found ad on local av site in India for Marantz 6003, which is only 45watt. same case new 6005 has also same.
I am currently using Klipsch RF62. and also have pair of bose 301. Klipsch is having 125watt. bose wrote 75-100 watt. So i am but confused, if the sound will come properly or not.

Another question was what if we get 100-120watt amp, does that affect any sound quality or just higher sound at lower volume? Because for example i have Marantz SR5008. Though it says like 85watt - 150watt. depends on ohms. per channel. from volume 0-35 sound comes but no one can hear. then only it starts to hear. But apporx i have to keep 55-60 usually to hear properly in movies and in music 40-45. So why that is happening?
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post #2 of 5 Old 07-12-2016, 10:42 PM
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do you have a phone app that can measure spl? how loud is it? with those speakers you should get pretty loud at 75% max volume. probably too loud. I need to have master volume around 50% for low level listening, think thats normal...50 watts should be fine for normal listening in normal size rooms with your speakers.

Power: Marantz sr7008, NAD C 275Bee x 2, Video: Oppo 103, Samsung 75un6300
Speakers: Focal aria 948, Focal cc900, Klipsch synergy KSF 10.5, Magnepan LRS
Subs: Rythmik FV25HP, Rythmik FV15HP
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post #3 of 5 Old 07-13-2016, 10:29 AM
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Speaker sensitivity is the spec you should be looking at.

Your Klipsch are very sensitive at 97db so they put out a lot of volume without the need for a lot of watts.

Using the calculator below, and recognizing that most people don't listen to movies/music at much more than 85db at their listening position, with 45 watts the db level at 10 feet comes to about 110db which would bring the police to your home should you ever try to go for max volume!

http://myhometheater.homestead.com/splcalculator.html

Bose in their infinite wisdom does not provide sensitivity ratings for their speakers other than saying the 301's are "high sensitivity."

45 watts should be fine.
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post #4 of 5 Old 07-13-2016, 03:03 PM
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Quote:
Originally Posted by nirajchokshi View Post
Dear all,
I am currently looking in integrated amplifier, but most of amps in my budget are only like 35watt-60watt. for example i found ad on local av site in India for Marantz 6003, which is only 45watt. same case new 6005 has also same.
I am currently using Klipsch RF62. and also have pair of bose 301. Klipsch is having 125watt. bose wrote 75-100 watt. So i am but confused, if the sound will come properly or not.

Another question was what if we get 100-120watt amp, does that affect any sound quality or just higher sound at lower volume? Because for example i have Marantz SR5008. Though it says like 85watt - 150watt. depends on ohms. per channel. from volume 0-35 sound comes but no one can hear. then only it starts to hear. But apporx i have to keep 55-60 usually to hear properly in movies and in music 40-45. So why that is happening?
I have the same speakers (RF62) and my amp is 40 watts/channel and it gets plenty loud. You should have no problem with and AVRs you're looking at, unless your listening position is really far- like 20 feet or more.

Klipsch RF-62II, RC-500, RS-400, SVS PC12+,
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post #5 of 5 Old 07-14-2016, 02:15 AM - Thread Starter
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Quote:
Originally Posted by Kini62 View Post
I have the same speakers (RF62) and my amp is 40 watts/channel and it gets plenty loud. You should have no problem with and AVRs you're looking at, unless your listening position is really far- like 20 feet or more.
Thanks all for sharing. I will probably get Marantz PM6004. and might pair with Bose. RF62 are currently attached in my Marantz SR5008.
Today i checked again, why there is no to a very minimum sound at level of 0-30. I mean i remember in old amps. I had technics, and cosmic, in both i just have to turn 1-2 points of knob and it was going on, and with only turned 3-4 points it goes to comfortable lavel of hearing. Is that because of higher watts of amp?

I am assuming bose 301 has about 89db. i dont know more, they dont have any specs in any of their products. but good speakers so i thought to put them at use.
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