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Old 7th February 2008, 05:47 PM   #1
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Default Home theatre - sub + fullranges question!

Hello,
I'm consider building home theatre speakers...
Topology that i choose is subwoofer + five channels i.e. 5.1
For soobwoofer i've choose two Peerless XLS10'' drivers. I think building one or two subwoofers with passive radiators in sealed 30l. The most question is for the other five channels.
I think about fullranges, maybe in small boxes... i really don't know. Maybe fostex, I like how they look with white cones, but what model will be suitable with XLS10 sub? I'm not sure about dependancy of SPL of front, back and center channels. For example for front speakers i may use FE207 dirvers , for rear - FE167, for center two FE 167 or FE127 drivers. Will i have to use recomended tweeters from Fostex for these drivers because except clear mid freqs i like clear high freqs too... Maybe other fullranges? I was thinking about EJJordans, but then i will exceed my budget, which is not exactly fixed btw... Anyway..
If any suggestions - You are welcome!
Thanks in advance!
Reggards!

p.s. If moderators consider that this thread is not for fullranges forum (because of more that two drivers construction, especialy including sub), then feel free moving in in another subforum. Thank You
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Old 8th February 2008, 04:33 PM   #2
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Hi,

I'm not the expert here but no one has chimed in to help so here goes:

If you are listening to these for TV only, then use all five the same driver. If they are also for stereo music you might wish to consider using better L & R speakers and the other 3 the same. As far as the tweeter goes, why not leave room on the front of your box so you may add it later if needed.

I am assuming you are planning a plate amp for the woofers? If so you may chose any driver for the 5.1 as the woofers volume is adjustable.

My choice is only one woofer cabinet not two as I have had better luck integrating it into the listening environment. Two boxes can lead to drop outs unless your sitting area is small and box location is not set in stone.
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Old 8th February 2008, 05:14 PM   #3
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" ... Topology that i choose is subwoofer + five channels i.e. 5.1 ..."

Personally, I like simple, two channel Stereo with a subwoofer.

Once you get it all set up with your screen exactly where you want it and your main speakers exactly where you want them (no mean feat) ... then is the time to add outrigger speakers for surround sound (5.1 or 7.1) ... or Not!

In my example, I prefer the planar flat panel speakers (from Magnapan) which are very, very hard to position exactly right (don't ask, its a long winded discourse) ... This involved building platforms and finding the almost perfect location.

(I actually do have some really nice surround sound satellite speakers for the rear L & R, but they are not hooked up (!) and are just for show. So now I've got this investment in extra speakers that I just don't use.)

Everyone's results are different, but I could almost guarantee that if you get your stereo mains and a subwoofer figured out and sounding really good, you may just veto adding the surround sound speakers, especially if you have a smaller listening room.
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Old 8th February 2008, 05:23 PM   #4
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For the record, I agree with Eddy here.

I have done no few 5.1 systems and even a few 7.1 systems now. I have to say that 7.1 does provide a bit of a different experience in a good room.

My suggestion is spend your money on your mains and sub and use only what is necessary for center and surrounds. You could get away with an inexpensive FR for a center and mains. Perhaps the TB FR drivers or an FE127. Maybe even doing something like 5 Fonkens would work, but I would definitely set it to stereo only for music listening. In fact, I am pretty sure the Fonkens would work well to blend with whatever sub you choose. My suggestion here is to go with a single sub as well. Placement can be a beast with multiple subs unless you do 4 or more to get rid of nodes.

OK that is about all of my technical knowledge. I am wiped out and going home now. lol.

Let us know what you decide.

Take care,
Robert
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Old 8th February 2008, 05:31 PM   #5
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Also ... say goodbye to any hopes of tube equipment, except for a whole bunch of mono-block modules (which work really well in a 5.1 system, but ...).

Which reminds me: Does anyone know of a really decent five (5) channel tube pre-amp?? Like with four input sets and five channels out? ... fur get about it ...
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Old 8th February 2008, 05:44 PM   #6
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Quote:
Originally posted by Cal Weldon

I'm not the expert here but no one has chimed in to help so here goes:
I'm not asking only experts, so I'm thankful to Your opinon!

Quote:
Originally posted by Cal Weldon

If you are listening to these for TV only, then use all five the same driver. If they are also for stereo music you might wish to consider using better L & R speakers and the other 3 the same.
I will listening not only for TV, but for Hi-fi in my bedroom. So front L+R may be better than surround, but I was hear opinions for DVD listening, that center channel must be better from all. And i know from my observations that almost in any case center channel includet two mids in paralel... I don't know why, maybe SPL will rise. And in most cases front channel goes the same brand in combination with surround channels.

Quote:
Originally posted by Cal Weldon

As far as the tweeter goes, why not leave room on the front of your box so you may add it later if needed.
Great idea, i will remember it

For choice of number of woofers, thank You. This will be very helpful! And i will be use plate amp. Thank You


Quote:
Originally posted by FastEddy

Personally, I like simple, two channel Stereo with a subwoofer.
I like it exactly in that way too, even without subwoofer. Only fullranges with small help with tweeters in highs.
But this will be my next project for my living room - High SPL drivers + sub , preferably SE tube amplifier, but here we have to stay to 5.1 incl dts receiver.
The 5.1 is for my bedroom

Quote:
Originally posted by FastEddy

Once you get it all set up with your screen exactly where you want it and your main speakers exactly where you want them (no mean feat) ... then is the time to add outrigger speakers for surround sound (5.1 or 7.1) ... or Not!
I understand what You mean, and yes i agree that even we may be not in exactly place.. when speakers are good, we don't need even sub... only 3D comes from fullranges... But It's not the same because in DVD movies DTS or AC3, they are independant recorded signals whitch canot be replaced with two stereo channels or even 5.1 DSP simulation.

Quote:
Originally posted by FastEddy

(I actually do have some really nice surround sound satellite speakers for the rear L & R, but they are not hooked up (!) and are just for show. So now I've got this investment in extra speakers that I just don't use.)
Very clever

Quote:
Originally posted by FastEddy

Everyone's results are different, but I could almost guarantee that if you get your stereo mains and a subwoofer figured out and sounding really good, you may just veto adding the surround sound speakers, especially if you have a smaller listening room.
Yes, but a month ago i've was carry out repairs in my home, and two cables stick out my walls and i will have to connected it with something... Surround speakers will help here.



Btw, i have two diy speakers with Visaton BG20 who may use for front speakers.
Reggards!!
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Old 8th February 2008, 05:56 PM   #7
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Quote:
Originally posted by musgofasa
I have done no few 5.1 systems and even a few 7.1 systems now. I have to say that 7.1 does provide a bit of a different experience in a good room.
My suggestion is spend your money on your mains and sub and use only what is necessary for center and surrounds. You could get away with an inexpensive FR for a center and mains. Perhaps the TB FR drivers or an FE127. Maybe even doing something like 5 Fonkens would work, but I would definitely set it to stereo only for music listening. In fact, I am pretty sure the Fonkens would work well to blend with whatever sub you choose. My suggestion here is to go with a single sub as well. Placement can be a beast with multiple subs unless you do 4 or more to get rid of nodes.
Thank You, for suggestions. After so many opinions about number of subs I will definately go to one sub only
so the questions for quality of center channel still remain...
I was thinking about FE127 in Fonken but only for surround and center channels.

Quote:
Originally posted by FastEddy
Also ... say goodbye to any hopes of tube equipment, except for a whole bunch of mono-block modules (which work really well in a 5.1 system, but ...).
Which reminds me: Does anyone know of a really decent five (5) channel tube pre-amp?? Like with four input sets and five channels out? ... fur get about it ...
As to be honest I was thinking about making Tube preamp. It's not so hard to do... i think... but i don't know on the other side quality receiver will do the same work especially for DVD... Don't forget remote control too... It's normal for market receivers, but It is impossible for Tube amp... So my favourite music will listen on 2.1 - My next project 2 channel tube + plate sub ...
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Old 8th February 2008, 06:00 PM   #8
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" ... As to be honest I was thinking about making Tube preamp. It's not so hard to do... i think ..."

I think so as well, however when you begin to deal with 5 channels output instead of just two ... and that pesky rotary switch that could or should be able to deal with three or four or five complete sets of 5.1 inputs too ...

You begin to try to come up with ways to combine source devices ... Do I really need a phonograph? Can I find an FM tuner with a phono input? That DVD player should also play CDs, right?

(I found a "universal" player that plays DVD to 1080p resolution, DVD-Audio, CD, SACD and even euro movies (PAL) ... but the power supply and the DAC needed some tweaking to get decent 24 bit audio.)
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Old 8th February 2008, 06:07 PM   #9
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Quote:
Originally posted by FastEddy
" ... As to be honest I was thinking about making Tube preamp. It's not so hard to do... i think ..."

I think so as well, however when you begin to deal with 5 channels output instead of just two ... and that pesky rotary switch that could or should be able to deal with three or four or five complete sets of 5.1 input too ...
I have 22 positioning six channel silver plated Russian military made rotary switch... but ... hahaha... You are right It will be nightmare calculating and soldering small resistors on it...

edit:

Quote:
Originally posted by FastEddy
You begin to try to come up with ways to combine source devices ... Do I really need a phonograph? Can I find an FM tuner with a phono input? That DVD player should also play CDs, right?
(I found a "universal" player that plays DVD to 1080p resolution, DVD-Audio, CD, SACD and even euro movies (PAL) ... but the power supply and the DAC needed some tweaking to get decent 24 bit audio.)
I'm thinking that phono will be most natural , CD player has big advantage - most music is stored in CD's...
For Audio i strictly stay on Pure CD player , tweaked if posible, stereo amplifier - tube if posibe. Right now I'm listening music in my Philips CD614, Grundig 8400 and Sony CDP some... Tube preamp with E88CC+ 6H13C , and then (unfortunately after sell of my Power follower) on my diy Gainclone... Gainclone suxx btw in matter of 3D ... Class A SE NF is the real truth of listening music!! preferable speaker cabinets - horn or tqwt...
Reggards!
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Old 8th February 2008, 06:20 PM   #10
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" ... silver plated Russian military made rotary switch ..."

Wow ... a collectors' item for sure, for sure. It would almost be a shame to "waste" it on an actual project.

Anyway, three sources, each source capable of outputting two to five audio signals ... then there is the discriminating circuitry needed for "auto switch" between ordinary stereo and Dolby 5.1 (or is that done in the source device??) ...

Anyway, a nightmare of a design ... multi device input for tube pre-amps is usually limited to three stereo sets (ex: Bottlehead.com ForePlay Pre-Amp kits have three stereo sets in, two stereo sets out controlled from a single three position rotary. The BottleHead folks recommend multiple pre-amps with split signal paths for "surround" sound setups.)

(FYI: My "home theater" has the above Bottlehead.com pre, connected are a DVD/CD/SACD/PAL/NTSC/1080p "u-player", an old FM tuner and either of two other devices: a new phono and a new Apple iMac connected via FireWire 24bit DAC / ADC from Echodigital.com ... I love it and absolutely will not let go of that tube pre-amp = it mellows out all that digital stuff to a far the well ... g'dam it does sound good to me. )[
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