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| Home Theater equipment list https://forum.lddb.com/viewtopic.php?f=27&t=24 |
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| Author: | rein-o [ 07 Feb 2012, 20:17 ] |
| Post subject: | Re: Home Theater equipment list |
wow, you guys have so much gear, do you spend more time turning knobs then watching stuff  seriously, great stuff but i can't do a large system again. 2 channel analog for me, 2 vintage 4 way speakers and a 2 channel carver amp gives me more than i need. neighbors were knocking on the door a few days ago just from the bass during the car chases in Dr. NO from the connery box set  not even any AC-3 or THX just good ole stereo with a powerhouse setup 
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| Author: | Guest [ 12 Feb 2012, 21:37 ] |
| Post subject: | Re: Home Theater equipment list |
laserbite34 wrote: ucfmatt I can see what you’re doing with the surrounds but move the seating forwards so you don’t get that hole in the back surround which is common or put a few more of the same loudspeaker on the back wall to fill in gap, wire them on to the same output on the AVR. Thanks for the tip. Turns out my 5.1 receiver is actually expandable to 7.1 with an additional 2-channel amplifier so I decided to take advantage of that. Turned my rears into sides and repositioned one of them from the back to the side wall, then build a little shelf for the 2 back speakers. Definitely sounds better and more immersive. 
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| Author: | invenio [ 12 Feb 2012, 23:28 ] |
| Post subject: | Re: Home Theater equipment list |
ucfmatt wrote: laserbite34 wrote: ucfmatt I can see what you’re doing with the surrounds but move the seating forwards so you don’t get that hole in the back surround which is common or put a few more of the same loudspeaker on the back wall to fill in gap, wire them on to the same output on the AVR. Thanks for the tip. Turns out my 5.1 receiver is actually expandable to 7.1 with an additional 2-channel amplifier so I decided to take advantage of that. Turned my rears into sides and repositioned one of them from the back to the side wall, then build a little shelf for the 2 back speakers. Definitely sounds better and more immersive. Nice setup. I think you will really enjoy having the extra 2 speakers. One note though is that if possible bring the side speakers forward a little. They really shouldn't be on the back wall "behind" your ears. Also, for some reason you have their orientation non-symetric. Make sure they are facing the same direction as speakers will sound off if they are not facing symmetrically to the listener. If possible try to put the on the side walls. Here is a little diagram for placement suggestions. 
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| Author: | Guest [ 13 Feb 2012, 02:50 ] |
| Post subject: | Re: Home Theater equipment list |
Thanks Invenio. Unfortunately for me my living room is not ideal for an HT setup. Immediately to the left of my right side speaker are sliding glass doors so I'm stuck there. You can't see it in the picture but the right edge of my left side speaker is right up against a corner leading to a hallway in a high-traffic area. I'd try and match the position of the other one but it would be right in the middle of the room and I think that might be awkward. My front speakers are asymmetrical as well and I realize the disadvantage of that, but considering what I'm working with I'm very happy with it. |
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| Author: | invenio [ 13 Feb 2012, 14:44 ] |
| Post subject: | Re: Home Theater equipment list |
ucfmatt wrote: Thanks Invenio. Unfortunately for me my living room is not ideal for an HT setup. Immediately to the left of my right side speaker are sliding glass doors so I'm stuck there. You can't see it in the picture but the right edge of my left side speaker is right up against a corner leading to a hallway in a high-traffic area. I'd try and match the position of the other one but it would be right in the middle of the room and I think that might be awkward. My front speakers are asymmetrical as well and I realize the disadvantage of that, but considering what I'm working with I'm very happy with it. Oh ok, I couldn't see all those "obstacles" from the picture that was posted. I have a friend who was in a similar situation. He actually put the speakers really high up to the ceiling and was able to mount them over his doorway. I don't know if this is a possibility. Another advantage of this is that kids/pets are not able to damage them and you get a more symmetric setup. You would also get some distance between your ears and the back speakers. Calibrating your current system is problematic because if your ears are 1 foot away from the rears and say 10 feet from the front, you actually have to have the front speakers 1,000 times as loud as the rear (I think I did my math correctly 2^10, as volume drops by the inverse square law)! That is going to put a lot of distortion into the system and by mounting them high you will even that out quite a bit. If you can move the rears say 5 ft from your ears up on the wall, then you go from a 1,000 times loudness factor adjustment to just 4x (2^2). I pretty sure about my speaker calibration/physics calculations but can somebody confirm that what I'm saying makes sense? |
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| Author: | publius [ 13 Feb 2012, 19:02 ] |
| Post subject: | Re: Home Theater equipment list |
Inverse square is right (apprxoimately, since reflections & other phenomena will enter into it), but you're doing the wrong mathematical operation here. You want 10^2 (100) rather than 2^10 (1024). 2^2 is, however, still 4. As the response of the ears is approximately logarithmic, the difference in perceived loudness will be 10*log(100) or 20 dB. |
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| Author: | invenio [ 13 Feb 2012, 20:01 ] |
| Post subject: | Re: Home Theater equipment list |
publius wrote: Inverse square is right (apprxoimately, since reflections & other phenomena will enter into it), but you're doing the wrong mathematical operation here. You want 10^2 (100) rather than 2^10 (1024). 2^2 is, however, still 4. As the response of the ears is approximately logarithmic, the difference in perceived loudness will be 10*log(100) or 20 dB. Thanks publius. He is of course right with the 10^2, I seemed to have reversed the numbers. I think the take home point is still pretty strong though,... that it's going to be next to impossible to get an accurate sound reproduction when the amplifier/receiver has to give 100 times the loudness in the front speaker relative to the back. Calibration algorithms are pretty good, but not that good! |
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| Author: | Guest [ 14 Feb 2012, 02:04 ] |
| Post subject: | Re: Home Theater equipment list |
Good points. Not sure if it matters but the 2 rear speakers are running off a separate amplifier, my main receiver just outputs a pre-out signal to the 2-channel amp. I like the idea of mounting them up a few feet above ear level on the wall. Would it be necessary to tilt them down slightly? Also I try and calibrate everything using test tones and my Andriod SPL meter app. Certainly not the most accurate but can't complain about free. |
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| Author: | invenio [ 14 Feb 2012, 02:35 ] |
| Post subject: | Re: Home Theater equipment list |
ucfmatt wrote: Good points. Not sure if it matters but the 2 rear speakers are running off a separate amplifier, my main receiver just outputs a pre-out signal to the 2-channel amp. I like the idea of mounting them up a few feet above ear level on the wall. Would it be necessary to tilt them down slightly? Also I try and calibrate everything using test tones and my Andriod SPL meter app. Certainly not the most accurate but can't complain about free. The more equal distant you get all the speakers from your ears the better (both for volume and potential sound delay). Tilting them toward you will probably be optimal but make sure their relative orientation is the same so that that sound will be symmetrical. Also, i'm guessing the speakers don't have rear open ports (if they do you can't obviously put them flush against the wall). So how many amplifiers are you using? You have a 7.1 setup so that means you have 4 separate 2 channel amps, or are you using the receiver to power some of the channels? Does your receiver have a mic input for sound level calibration like Audessy or something like that? That would be the easiest and probably more accurate than the Android as they put really lousy mics in those things. I tried one of those apps with my iphone and it was pretty much useless but they probably use different mics in other devices. You have an interesting setup with a lot of potential, you may want to post some more pics so we can have a better look and perhaps make some creative suggestions. |
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| Author: | Guest [ 14 Feb 2012, 02:42 ] |
| Post subject: | Re: Home Theater equipment list |
invenio wrote: ucfmatt wrote: Good points. Not sure if it matters but the 2 rear speakers are running off a separate amplifier, my main receiver just outputs a pre-out signal to the 2-channel amp. I like the idea of mounting them up a few feet above ear level on the wall. Would it be necessary to tilt them down slightly? Also I try and calibrate everything using test tones and my Andriod SPL meter app. Certainly not the most accurate but can't complain about free. The more equal distant you get all the speakers from your ears the better (both for volume and potential sound delay). Tilting them toward you will probably be optimal but make sure their relative orientation is the same so that that sound will be symmetrical. Also, i'm guessing the speakers don't have rear open ports (if they do you can't obviously put them flush against the wall). So how many amplifiers are you using? You have a 7.1 setup so that means you have 4 separate 2 channel amps, or are you using the receiver to power some of the channels? Does your receiver have a mic input for sound level calibration like Audessy or something like that? That would be the easiest and probably more accurate than the Android as they put really lousy mics in those things. I tried one of those apps with my iphone and it was pretty much useless but they probably use different mics in other devices. You have an interesting setup with a lot of potential, you may want to post some more pics so we can have a better look and perhaps make some creative suggestions. Thanks. I'm using a Yamaha RX-V467 5.1 receiver for all but the back speakers. Even though my receiver only amplifies 5 channels it can decode 7.1. There is a set of pre-outs for the optional 2 back speakers so I have that running to an old 2-channel stereo amplifier I had lying around. It does have YPAO calibration (Yamaha version of Audessy) so I'll give that a shot. I'll see if I can post some more pics soon. I have some cell phone pics on page 4 but I need to take some better ones. |
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| Author: | invenio [ 15 Feb 2012, 01:15 ] |
| Post subject: | Re: Home Theater equipment list |
ucfmatt wrote: invenio wrote: ucfmatt wrote: Good points. Not sure if it matters but the 2 rear speakers are running off a separate amplifier, my main receiver just outputs a pre-out signal to the 2-channel amp. I like the idea of mounting them up a few feet above ear level on the wall. Would it be necessary to tilt them down slightly? Also I try and calibrate everything using test tones and my Andriod SPL meter app. Certainly not the most accurate but can't complain about free. The more equal distant you get all the speakers from your ears the better (both for volume and potential sound delay). Tilting them toward you will probably be optimal but make sure their relative orientation is the same so that that sound will be symmetrical. Also, i'm guessing the speakers don't have rear open ports (if they do you can't obviously put them flush against the wall). So how many amplifiers are you using? You have a 7.1 setup so that means you have 4 separate 2 channel amps, or are you using the receiver to power some of the channels? Does your receiver have a mic input for sound level calibration like Audessy or something like that? That would be the easiest and probably more accurate than the Android as they put really lousy mics in those things. I tried one of those apps with my iphone and it was pretty much useless but they probably use different mics in other devices. You have an interesting setup with a lot of potential, you may want to post some more pics so we can have a better look and perhaps make some creative suggestions. Thanks. I'm using a Yamaha RX-V467 5.1 receiver for all but the back speakers. Even though my receiver only amplifies 5 channels it can decode 7.1. There is a set of pre-outs for the optional 2 back speakers so I have that running to an old 2-channel stereo amplifier I had lying around. It does have YPAO calibration (Yamaha version of Audessy) so I'll give that a shot. I'll see if I can post some more pics soon. I have some cell phone pics on page 4 but I need to take some better ones. Just looked back and I remember those posts as you have the same Polk Audio PSW-650 sub as I. You definitely have one of the more "challenging" setups due to the unusual room configuration. I think overall you did a good job with setting everything up. Of course, there is always room for "optimization." Try the YPAO calibration and see if you get similar results to the ones you did manually with your phone. Hopefully that will be a good starting point and then you can do some fine calibration with listening. It's interesting that your receiver is 7.1 capable but that it only amplifies 5 channels. Using the extra 2 channel amp makes sense and shouldn't give any major problems, especially in the rear channels which overall gets minimum use. |
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| Author: | laserbite34 [ 15 Feb 2012, 20:19 ] | ||
| Post subject: | Re: Home Theater equipment list | ||
ucfmatt wrote: laserbite34 wrote: ucfmatt I can see what you’re doing with the surrounds but move the seating forwards so you don’t get that hole in the back surround which is common or put a few more of the same loudspeaker on the back wall to fill in gap, wire them on to the same output on the AVR. Thanks for the tip. Turns out my 5.1 receiver is actually expandable to 7.1 with an additional 2-channel amplifier so I decided to take advantage of that. Turned my rears into sides and repositioned one of them from the back to the side wall, then build a little shelf for the 2 back speakers. Definitely sounds better and more immersive. I know pinhead likes his place to be dark  but at least I can see now. Have you looked on eBay for the same surround or loudspeakers going for a really low insane nuts price that would make you laugh! Get the surrounds matched and if can find more of the same at silly low price put a few more along the sidewalls (get surrounded)!
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| Author: | laserbite34 [ 15 Feb 2012, 20:39 ] | ||
| Post subject: | Re: Home Theater equipment list | ||
ucfmatt wrote: Thanks Invenio. Unfortunately for me my living room is not ideal for an HT setup. Immediately to the left of my right side speaker are sliding glass doors so I'm stuck there. You can't see it in the picture but the right edge of my left side speaker is right up against a corner leading to a hallway in a high-traffic area. I'd try and match the position of the other one but it would be right in the middle of the room and I think that might be awkward. My front speakers are asymmetrical as well and I realize the disadvantage of that, but considering what I'm working with I'm very happy with it. Not sure by what you mean “ideal” my room is most certainly not idea but I’ve managed to make it possible and if you think that is the only room I was going to use the bedroom as the home cinema and the living room as the bedroom as I never had large bedroom before .As it turned out I was directly above all the other bedrooms and some don’t like JAWS banging his head against the “you’re gonna need a bigger boat” at 11pm! LOL So I moved it back to the living. One the bedroom was evenly shaped smaller at 12 all around ceiling height is the same just a bit over 8 feet. I see with the picture and maybe go a bit creative tonight and take at least 4 to 6 pictures get back as far as you can to the wall and take a wider shot so we can at least see the room. I can see what can only be a door to left of the picture? Maybe its hatch to pinheads cave I don’t know?If it is a door I would place the fronts LCR TV yes turn it all around! But at least let us see before doing that. But let guess the door to left and maybe a window to right or left of the room hell you might have something fancy like an overhead window? Lol but I’m guessing if the LCR and TV was at back or the other way around, you could still fit the surrounds up higher mounted on the walls and move the sofa many feet forwards so the door clears it by a few feet. Sub bass you might keep it in the same location or try and remember how it sounds with certain film on one specific scene that lasts a few seconds so that the memory can hold on to that for reference for later use.
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| Author: | laserbite34 [ 23 Feb 2012, 07:27 ] |
| Post subject: | Dolby Stereo CP55 |
A new vintage addition arrived yesterday the Dolby CP55 optical processor.   Film on the CRT is The Long Kiss Goodnight bluray which I brought yesterday damn I forget oh good this Renny Harlin film was when I saw it in the cinema only in Dolby Stereo analogue back around 1996.  It has magnetic input for 4track rarely often used on 35mm. x3 screen 27bands 1/3 octave EQ modules for LCR  It doesn't have the CAT-241 card installed for the mono EQ and OBE optical bass extension (but I can always keep a look out for that card or the CAT-441).  Dolby CAT-64 EQ module pulls out the slot on case that contains the 27 bands 1/3 octave behind a removable plate that has to be unscrewed while another attachment is fixed to module so that EQ can be adjusted for the stage channels.  I've been removing the cards to clean the somewhat 27 years of dust out of it! And for 27 years its in fair good shape for its age. The CAT-240 cards to left are the optical cards with spare card. Dolby CAT-222A duel A-type noise reduction.  Cards all slotted back into frame they're not easy to remove and needs a good grip to pull them out but they slot back in easily.  A real Dolby CAT-Sooty checks the CP55 over and gives it 5 paw Dolby THX approval her purfers vintage Dolby.  After sniffing the CP55 over Sooty has found new Dolby CAT to play with.  There isn't any HDMI connections on this its a somewhat bit more complicated and I've been reading up the installation manual thou it is rather straightforward.  As to how I'm going to wire as I need another rack to remove all the processors and transfer them over to larger rack and keep the amps in the smaller rack, maybe? |
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| Author: | benmbe [ 23 Feb 2012, 09:38 ] |
| Post subject: | Re: Home Theater equipment list |
Good morning laserbite34, WOW! That's some tweeking youv'e done there & hope the rest, with the new additional box goes to plan. At least after this you will have the added knowledge of how it all works. Thank you for sharing each step with us all here. Love the pictures of the cat How is life treating you and I hope the neighbour is well Regards
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| Author: | laserbite34 [ 23 Feb 2012, 11:20 ] |
| Post subject: | Re: Home Theater equipment list |
Morning benmbe Point of fact it might be weeks for this one to be set as I’m saving up for some CAT cards for the CP500 to get that fully up and running as it seems the CP45 was the easiest to set-up even though I needed an extra CAT-515 card to get the stereo surrounds up and running. I might have to make patch bay for the lead outputs from each Dolby CP then the leads will pass to amps something like that. |
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| Author: | benmbe [ 23 Feb 2012, 12:51 ] |
| Post subject: | Re: Home Theater equipment list |
Good day laserbite34, I noticed that you have the Front Right, centre & Left cards in place. Will you need to purchase the same individual Cards for the side Left & Right and then the Rear Right, Centre & Left? Do you already have the above cards, or will these need to be purchased seperately & are they costly? After all this is done you ''no doubt'' will be pretty much qualified to carry out professional calibrations, installations. I must admit that whilst reading and seeing the progress that you are making, is giving myself the enthusiasm, for when I take the time off and set my own system up, including the callibration when the equipment support stands are finally in place. Friday 2nd of March marks the completed purchase of two thirds of my equipment Support stands, of which means that I will be able to place my screen on the double width stand, along with the single width. One section left to be purchased and placed on the other side by the end of April. I shall need to purchase 4 x proper microphone stands so that when calibrating, I can have each one at the correct head height when seated, with around five additional different position settings, that way I will have around 6 presets programmed into the onboard memory. Please keep us informed of your progress sir' Regards 
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| Author: | laserbite34 [ 23 Feb 2012, 13:31 ] |
| Post subject: | Re: Home Theater equipment list |
benmbe I think you misunderstand the no more extra EQ cards for the surrounds that is it! Same goes with CP65 its the same size only the cards are laid out differently. The CP200 has cards for surrounds its monster of huge processor. The CP55 has limited bass mid and high EQ trim kinder like the CP45 only CP45 has 9 band 2/3 EQ. I’d like to get the CP55 tested out but it means undoing the CP45 moving the rack around getting in the back and soldering up the wires for the basic LCRS and running some tests. So you should set-up soon and maybe we can see some pictures. |
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| Author: | laserbite34 [ 23 Feb 2012, 14:14 ] |
| Post subject: | Re: Home Theater equipment list |
So far the only thing I’ve done is de-soldered the wires. Not sure if I have any spare cables suitable enough for re-wire and sound check. There a few wires I left untouched until I can suss out what the extra modification is on LCR outputs, I’m assuming its a kinder of bass extension mod as it has a few resistors and potentiometer on tiny PCB. Until get some audio passing though I’ll leave it as is. 
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| Author: | benmbe [ 23 Feb 2012, 18:36 ] |
| Post subject: | Re: Home Theater equipment list |
Good afternoon / evening laserbite34, Your quote; So you should set-up soon and maybe we can see some pictures. My reply; I shall hopefully be able to place picture's of my AV equipment out of their boxes and on their shelves around the end of May. . . . . . If all goes well. I cannot foresee the calibration taking place before then, as I would need to purchase suitable mic stands before this can take place. . . . .like the saying goe's do it right the first time or don't do it at all A good headphone amp will be joining the setup, as soon as available funds allow. Kind Regards
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