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HT Receiver - under 40 watts per channel?

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#1 of 8 GaryBo



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Posted April 29 2003 - 11:38 AM

Hi Folks,

I searched the archives and couldn't find an answer, so I hope this is the right place to ask this question...

I am approaching HT for the first time, but I have played with very low power SE tube systems and high sensitivity horns for a while (for two channel music). I am looking to put a bedroom 5 channel system together based around the old Radio Shack 40-1354a fullrange driver in various enclosures, notably two TQWTs for the fronts. I was prudent enough to pick up 6 of these drivers for a few dollars each when they went on closeout a couple of years ago. The problem is though they are somewhat sensitive little devils (93Db 1 watt / 1 meter)and have a maximum power rating of 40 watts. I have been trying to find a receiver that can drive 5 channels (maybe with a sub, though I don't know that I would need one as the TQWTs will go down to 50Hz or so), while producing no more than 40 watts per channel.

Does anyone have any receiver recommendations please? I would prefer to stay with a solid state rec., rather than building a tube monoblock for each channel as that would be too expensive.

Thanks in advance.

#2 of 8 Jonathan M

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Posted April 29 2003 - 11:56 AM

Hi Gary,

The 40W rating on the speakers is likely the sustained rating that the voice-coil can take before it goes up in smoke. As you are probably aware, music is peaky in nature (HT even more so) and hence you will probably only be using a watt or less at a time. The key is that if the receiver you use is putting out more than 40W per channel, you won't have a problem unless you really crank it up for sustained levels. Note that a 40W/channel or less receiver will have even more of a problem if you crank it up as it'll start clipping earlier, thus putting even more heat through the voice coils. Most receivers will therefore be adaquate no matter what there power rating is. My advice is to get one that you are happy with the interface/looks etc. The power will not be a problem.

Hope this helps.
"Price and quality are not correlated"

DIY Home Theatre

#3 of 8 GaryBo



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Posted April 29 2003 - 12:10 PM

Thanks Jonathan, that is good to know. This will be a bedroom system, so the volume won't be an issue.

If this idea of using fullrange drivers in a HT works out I have 5 1960's vintage Electrovoice 12TRXBs that I will use in a living room system at some point in the future. They are built like tanks so I won't have to watch the volume control so carefully. They will also need enclosures about 8 feet tall...



#4 of 8 Jamey F

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Posted April 29 2003 - 01:39 PM

I will pass on what I've always been told. You are more likely to damage speakers with an underpowered receiver than one that exceeds the ratings of the speakers. As said above, just keep the volume level reasonable, and you will be better off delivering clean power rather than straining a low power receiver.

#5 of 8 Paul Clarke

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Posted April 29 2003 - 04:56 PM

Go to Harmanaudio.com and look for refurbed 2XX or 3XX series receivers. They are more in the wattage range you desire.
"By the blood of our people are your lands kept safe."

#6 of 8 Jerome Grate

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Posted April 30 2003 - 04:19 AM

Paul is correct, the HK series 220 or 225/320 or 325 will sufficiently drive the speakers you have with no problem. Volume is the key here in reference to driving the drivers to it's fullest capacity. The Harman Kardon receivers sound good at low levels as well, and as long as you keep the receiver at a low to moderate level, you won't have any problems or risks in destroying your speakers.
Listen Up People.., Rack Em and Pack Em.., We're Phantoms in 15.

#7 of 8 GaryBo



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Posted April 30 2003 - 05:52 AM

Excellent, thanks guys! The HK units look good, and the 320-Z looks like great bang for the buck. It has 7.1 processing, so that will give me an excuse to cut an extra rear channel enclosure. If I want to get really ambitious I could also put together a little 7 channel tube preamp at some point in the future. Fun!



#8 of 8 Yogi



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Posted May 01 2003 - 07:04 AM

Mostly you are listening to only a few watts of power and spakers can take upto 5 times their rated power for short durations, so dont worry about the receivers max power and get the best sounding one for your money.
The truth is not out there but within you.