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Well, this is an excellent start.

I'd be a bit concerned if it gets hot to the touch after an hour.

Google up ‘phonons negative gravity’.  Enjoy.

It gets pretty hot to touch being in the center. Yea thanks for that link @TasDom
Have you used one of those before?

Yeah I agree. I bought from viva before with great results, but they don't sell the 6ca7 psvanes I ordered.   Can only get those from china direct.

Hi Pk, I'll link the second video at the bottom of this. In basic terms there can be few benefits to using an amp: More power is driven to each speaker (assuming you buy an amp capable of delivering more power than your receiver) -You will literally be able to hear things that you didn't before. Allows you to connect more speakers (in the case you have a 9.2 receiver capable of doing 11.2 channels) Less stress on your receiver because it doesn't have to work as hard delivering power to speakers Less distortion per channel. The power used to send an audio signal to your speaker will be cleaner with better amps Also once you take partial load off your receiver, it has more power to send to other speakers.  So when you look at that amp you linked in the specs it says 80 watts per channel when ALL channels are hooked up to a speaker. Thats 80 x 7 for a total of 560w. If you only had 5 channels being used on the amp - that power would then be 560 / 5 = 112 watts per channel.  Now let's look at the 11.2 channel denon. The specs say it does 140 watts per channel when ONLY 2 channels are driven. Thats a total of 280 watts (half the power of the amp). So if you have 11 speakers hooked up to it that means you will have about 25 watts going to each speaker, and that is based off the denon spec sheet which usually optimistic at best. Not nearly as much power as an entry level amp.    So if you had the 7 channel amp driving all 7 speakers, thats 80 w per speaker output, with 4 speakers powered by the receiver now to get you to a total of 11 speakers. Those 4 would be getting 70w each from the receiver. Almost 3 times the power now then without an amp. Also the other 7 will be getting a cleaner signal from the amp and should sound better in addition to being capable of louder output. Again this also depends if you have good speakers or not.
Hopefully I explained this correctly and makes sense! -Spencer

Second video:   

I have been designing and building tube amps ( for my own use) for 40 years.  Decided to do a thread, where I show people my next design.  This will be a KT88  SE  DIRECTLY - COUPLED  two-stage amplifier, with a L.S.E.S. Power Supply ( Low Stored Energy Power Supply ).   I have it all designed, and will be DIY building it over the next couple of months.  Since this section of the Forum deals with TUBES, I thought some might enjoy seeing a build progress, in photos.   I start all my amp builds with a custom made 14 gauge steel chassis, as I prefer the sound of steel over aluminum.   The chassis dimensions are Golden Ratio, or a 1.62 to 1 ratio, length to width.   I carefully position major component placements, as well-thought-out lay-out in a SE amp is one of THE most important areas needing one's attention and optimization.  Here is the start :  

The whole idea of a soul is a man made concept. People already beleive they have a soul then search their entire lives for a way to prove it.  It is an unquantifiable thing.  The modern day "soul searchers" are akin to the alchemists of the dark ages, knowing they can make lead into gold and wasting their entire lives in the search to prove it....  

If these Khorns are yours this post belongs in the Garage Sale section.  

Shameless bump