| bluegti |
I read in a thread once that full range drivers were not well suited to home theater. But below there is a thread that says people are having good luck using a FE127E for a center channel.
I want to build 3 matching speakers for my left, right and center channels. The processor would identify the speakers as "small" so they would most likely not have to do anything below 80 Hz - a subwoofer would be used to fill in the bottom octaves.
How would a Jim Griffin Jordan JX92 bookshelf speaker do? Could I modify that design into a MTM for the center? Any suggestions for a Fostex driver? If using full range drivers is just a bad idea, can you point me in a direction to look for good alternatives? |
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| chrisb |
It's hard to argue with the idea of using FR drivers for the front row, nor would sticking to all Fostex drivers hurt either.
Unless you're looking for subterranean LFE, you might well eliminate the need for a separate powered sub by running either 167 or 207s in MLTL for the L&R mains, and the 127 for center. With phase plugs, the 167 is quite adequately extended, but the 8" drivers might need a little help up top (say above 10k)
It probably depends how your viewing is split between regular broadcast or cable network programming, and "movies", but I've found every time I can reduce the number of speaker enclosures in my audio and HT systems the better. Indeed, I'm now running my TV's variable line out to a small tube amp into a single pair of 2-ways, and gave the Denon HT receiver, bipole towers and powered sub to my son.
Another great choice for HT drivers, provided you have sufficient power to compensate for the lower efficiency, and would like the extra weight and kick in the bottom, would be the CSS FR125 and Extremis sub combination. In fact a simplified DIY version of the RAW HT3 (minus the ribbon tweeter) could be achieved with a single FR125 and Extremis/plate amp per tower ( I particularly like this Cerwin Vega amp from Steve at Apex Jr)
http://www.apexjr.com/CVT200S.htm
I think it's fair to say that with a pair of Extremis in the room, a separate sub would be overkill for most folks. |
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| Bob Brines |
I'll second Fostex drivers for HT. I've got FE207E's in MLTL's as fronts and FE167E's in up-firing BR's as rears. I'm using a phantom center and am happy with the results, but YMMV. I think I would use a FE167E in a 15 liter BR for the center, assigned as "small" if I were to use one. The FE127E seems a little small to me, particularly if you like it LOUD. I've used FE167E's for fronts successfully, but it is best to assign them as "small". In any case, you will want a sub for the LFE channel. You want to keep the LFE out of your fronts, particularly if you use FE167E's.
Bob |
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| bluegti |
I'm liking the idea of using the Fostexes because I have a few low-watt tube amps that I could swap in for music. Here's what I'm thinking now... 2 MLTL's for the Left and Right channels and a BR for the center. All 3 would be run as small and subwoofers would fill in the low end when watching movies.
I noticed the xmax of the FE168EZ is 1.6mm compared to the FE167E's xmax of 0.6mm. Would this make it more suited to Home Theater?
BTW, I know nothing about speaker design, I can just follow directions. So, I have no idea if the 168's would be good in a MLTL - I've heard 167's and really enjoyed them.
One final question, and I know this is subjective, is the 168 worth the extra cost? Cost is not an issue (at this price point), but I don't want to spend extra money if its not worth it. |
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| Bob Brines |
| quote: | Originally posted by bluegti
I'm liking the idea of using the Fostexes because I have a few low-watt tube amps that I could swap in for music. Here's what I'm thinking now... 2 MLTL's for the Left and Right channels and a BR for the center. All 3 would be run as small and subwoofers would fill in the low end when watching movies. |
You've got it!
| quote: | | I noticed the xmax of the FE168EZ is 1.6mm compared to the FE167E's xmax of 0.6mm. Would this make it more suited to Home Theater? |
Once you high-pass the FE-167E's at 80-100Hz, excursion is no longer a problem
| quote: | BTW, I know nothing about speaker design, I can just follow directions. So, I have no idea if the 168's would be good in a MLTL - I've heard 167's and really enjoyed them.
One final question, and I know this is subjective, is the 168 worth the extra cost? Cost is not an issue (at this price point), but I don't want to spend extra money if its not worth it. |
The 168EZ will work in a MLTL with a little series resistance. Whether they are worth the price is in the ears of the beholder.
Bob |
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| navin |
HT usually requires some low bass. most DVDs have significnant LF information.
I would consider using a sub even is a 167 is used for the L&R.
another option would be settle on a good wide range driver (that can be used fullrange) for all 5 channels. add a tweeter for smoother and more extended HF in the L&R channels and a sub or 2 or 3 to manage LF. this way for most of the audio range (say 100Hz - 6Khz) the same driver is active. |
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| chrisb |
If I understand Bob's comment regarding phantom center channel correctly (i.e. set the processor to "center= none" and run just L&R mains) I'd concur completely.
The enclosure volume for even the small 167 BR can be a PITA to accomodate aesthetically. (one reason to consider the 127 if your SPLs aren't extreme).
Although I don't think you mention the enclosure design, you've apparently been satisfied with what you've heard from 167's. If you're still worried about excursion at higher volume levels, high pass as he suggests (between 80-100 if variable at the processor) and add sub(s).
For maximum single driver performance with the 168EZ, a BLH is generally recommended, particularly with low powered tube amps. Properly executed, the dynamics, imaging, soundstage and overall coherency is easily on par or surpasses the 167 - although the bass extension/punch may suffer slightly, particularly if the former are used in conjunction with low powered, low DF tube amps and the latter with SS HT receiver, gain clone, class A type SS or any of the newer digital amps. Unfortunately enclosure volumes for BLH can be unwieldy, particularly in a video system with subs, etc.
Are the Sigma series drivers worth the extra cost? For dedicated music only hi-fi audio that's a very personal choice, similar to the discussions re flavoring a tube system by rolling different vintages and designs of bottles. For HT/video, where the audio production values are to say the very least, not entirely natural in perspective, I'd suggest probably not. |
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| no xo |
| Fostex full range drivers work great in my Ht system. I use FE206E`s in recommended BLH for main L&R, an FE127E in recommended BR box for center, and FE166E`s in recommended BR boxes for rears. Also I use a Parts Express 12" sub & 250watt plate amp in 3 cubic ft box, downfiring, with a NAD receiver`s xover set to 80HZ. The different drivers blend well together and will play very loud (AC/DC live.ect) without overload. The system is in a large room with the rears back farther than ideal, and has 3 main functions. #1 2 channel for CD & LP`s, #2 HT for movies and music video`s, and a party system when I have friends over to shoot pool, play darts and rock out with rolled ones and cold ones. I would not worry about the FE127E being able to play loud if your bass management system cuts the bass at 80 or 100HZ. When we are partying and I play a good DVD of live music, everyone drops their cue stick and stares at the screen with their jaw dropping. Some friends use their cue sticks for an air guitar when I play Joe Bonamassa, Hendrix and Zappa. I consider that a compliment since most of my friends have no idea of the speakers design. |
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| planet10 |
I typically have any of a number of full-ranges in the LR of my home theatre (Fonken, RonHorn A126, FE167 in modified Fostex BR, miniOnkens). I prefer a virtual centre to a real centre, and haven't bothered with surrounds in a long time (have the amps and any number of speakers, just can't be bothered). I have a push-push ApexJr Super 8 sub, which sitting in the corner seems to match the room gain nicely.
I'm also working on a client system that has FE167e in sealed boxes (modeled F3 of 106 Hz) driven by Red Light District. LR are actively XOed to a pair of Extremis each side (driven by Bryston 4B) and LR & rear surrounds are FE127e in a variation of the diyAudio ref ML-TL built into the walls & cieling and also driven with Red Light District. No separate sub.
dave |
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| 3-LockBox |
A fullrange speaker should work as well as any type of speaker. The real problem is that cross-overless FR drivers are very revealing and that is a problem when you're running them with a poor quality HT reciever (and there are a bunch of those).
Case in point, when I run any of my FR projects on an old Kenwood receiver I have, the speakers pump like pistons with tremendous breakup in the bass; this improves a little when I switch to my main rig's Pyramid ( a seperate amp), but when I hook up my little class D amp, there is much less cone movement and way better (cleaner) bass. Hell, if I had enough D amps, I'd definately use five or more FR single drivers in an HT set-up. But I've heard a couple of my single driver projects on conventional mass-market HT receivers and they sucked (Pioneer, Sony, HK, etc).
And everyone here is right, most HT receivers have a bass management system that cuts 80hz to 120hz from the rest of the system so you can let a powered sub do the grunt work. I can tell you from experience that most FR drivers will sound better in this configuration (than they do 'normally'), even the cheap ones, because they're not pushing the deep bass. |
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| planet10 |
| quote: | Originally posted by 3-LockBox
poor quality HT reciever |
i should mention i have DVD into a separate HT processor and then into the amps of my choice
dave |
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| 3-LockBox |
| quote: | Originally posted by planet10
i should mention i have DVD into a separate HT processor and then into the amps of my choice
dave |
Are there any good quality HT processing pre-amps that are relatively inexpensive? |
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| planet10 |
There are a couple old Technics (mine is an SH-AC500D, i think there was also a 300. Not really a preamp... mine was used when i got it over 10 years ago...
dave |
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| navin |
| quote: | Originally posted by 3-LockBox
...The real problem is that cross-overless FR drivers are very revealing and that is a problem when you're running them with a poor quality HT reciever (and there are a bunch of those).
... but when I hook up my little class D amp, there is much less cone movement and way better (cleaner) bass. Hell, if I had enough D amps, .... |
I have used a old Marantz SR7000 AVR with a pair of JX92 for 2 ch. CD audio and yes it was a triffle harsh but nothing that some toe-in or a touch of high pass could not cure. Ofcourse I do wish the hf was smoother. hence my above observation that for 2 ch. audio it might make sense to use the fullrange crossed over to an appropriate tweeter.
I assume the 167/207 might also benefit from this technique.
Class D amps are plentiful where I live (India). I have yet to do a comphrehensive ABX test of a Class D vs a Class AB amp but for the bass Class D seems to be very viable.
In short if you have the space for 4 towers a set of 4 167/207 and a phantom center would do nicely for starters. then add a sub and a pair of tweeters (for 2 ch. audio) if you desire. |
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| bluegti |
| quote: | Originally posted by 3-LockBox
Are there any good quality HT processing pre-amps that are relatively inexpensive? |
Inexpensive is a relative term of course, but I see Merdian 565 preprocessors on a audiogon for less that $1,000 regularly. They were originally $5500.
I have one which I bought used for more than twice the current going price. Every time I consider upgrading to the lastest model my dealer tells me that the improvement isn't worth the cost. While shopping for speakers and tube amps, I brought it into a well respected mostly tube retailer (DejaVu Audio) and Vu himself praised the preamp's sound.
Make sure you get one with the DTS upgrade. While 5 years old (or older) these are awesome for home theater. They don't have lots of inputs or video switching, and have a really cryptic way of configuring the inputs, outputs, crossovers,etc but they sure sound great once you get them set up. |
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| phresh |
I'm currently running a newly built pair of Bob Brines LT-2000's (Fostex FE207E) with a Marantz SR7500. To be honest you would struggle to need a sub unless you have a massive room. I've tested these on some pretty hefty action scenes and bass heavy material and they never seem to struggle with it.
I like the idea of buying one of the older preamps (the meridian you mention, also the MC-1 or even the new rotel 1098). Problem was I would have needed to build amps (DIY bug!!) and wouldn't have got it done for a year or two!
I'm probably going to build the recommended fostex centre speaker using the FE103E as I have limited height and none of the bass reflex designs will fit.
After that it's on to the rears, but not sure what i'm going to build for those yet as the seat is against the back wall. Will need either a bipole or 'flat' design cabinet. |
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| Bob Brines |
| quote: | Originally posted by phresh
I'm currently running a newly built pair of Bob Brines LT-2000's (Fostex FE207E) with a Marantz SR7500. To be honest you would struggle to need a sub unless you have a massive room. I've tested these on some pretty hefty action scenes and bass heavy material and they never seem to struggle with it. |
I'd still use a good sub for the LFE channel. Some of this stuff is well below the capabilities of the LT-2000/FE207E. BTW, you might want to experimentt with increasing the port length to 7" and using these filter values:
| quote: | | After that it's on to the rears, but not sure what i'm going to build for those yet as the seat is against the back wall. Will need either a bipole or 'flat' design cabinet. |
My rears use FE167E's and are only 8" square in footprint. Email me.
Bob |
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| clearwaterms |
okay,
sorry to rehash an old thread, but I figured always better to rehash an old thread vs. starting anew...
My question is would it be possible to use a pair of BIB's for front channels in a home theater, if it is possible, what would be a recommended driver? this will be augmented by a subwoofer and the 'small' setting crossing over at 80Hz. Also, being a front projection there is no TV stand, the screen is hung from the wall, and there is space below the screen (however nothing behind it) so I could build a resonable sealed cabinet for the center channel.
finally, if I wanted to add a helper tweeter how would you go about doing that?
and lastly, what are everybody's thoughts of taking something like a BIB horn and active cross over and adding a subwoofer to each channel? say at 80Hz again? |
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| lousymusician |
| quote: | Originally posted by clearwaterms
okay,
sorry to rehash an old thread, but I figured always better to rehash an old thread vs. starting anew...
My question is would it be possible to use a pair of BIB's for front channels in a home theater, if it is possible, what would be a recommended driver? this will be augmented by a subwoofer and the 'small' setting crossing over at 80Hz. Also, being a front projection there is no TV stand, the screen is hung from the wall, and there is space below the screen (however nothing behind it) so I could build a resonable sealed cabinet for the center channel.
finally, if I wanted to add a helper tweeter how would you go about doing that?
and lastly, what are everybody's thoughts of taking something like a BIB horn and active cross over and adding a subwoofer to each channel? say at 80Hz again? |
IMO, the main point of building a BIB is that it gets more and deeper bass out of a full range driver than it will make any other way. The tradeoff is that it may not have the flattest possible response. Cross the BIB over at 80 Hz and you're throwing away the bass extension, and keeping the coloration. Possible, sure, but maybe not the best application. Now, if you also want the BIB's to play music wthout the sub, then by all means proceed!
I'd say keep it simple. For HT w/sub, choose your FR based on your preference, your budget and how loud you want to play. Shielding is not a factor since you're using a projector. Put it in a sealed box wth a reasonable Q (or maybe aperiodic), cross it to your sub, and Bob's your uncle. Since you're relieving the FR of bass duty, even a dipole baffle could work if you have the right room (THX purists need not apply). Unless you're using a huge screen, you may be able to get away without a center channel. (Ditto that disclaimer).
All that said, my FR125 BIB's are currently serving as my HT rear channels! Mostly because I haven't taken time to build smaller boxes for them, but also because they don't need stands this way.
Depending on your room and listening level, the FR could be anything from a 4" Tang Band or CSS FR125, to an Fostex 208EZ, a Hemp Acoustics FR8 or an Audio Nirvana 8, 10 0r 12", or a Lowther, or a Feastrex... |
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| Ray Collins |
I agree; I am using my FE168EZ Sigma BIB's as my HT rear channels...and I thought I was committing heresy!!!
Ray |
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| clearwaterms |
so I wanted to use say the Audio Nirvana 8" standard or the FE206 just a simple sealed cabinet. WOuld it be just one driver per box? And what would I want for the size of the cabinet?
Also, don't I have to put a BSC circuit in between the amp and speaker? |
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| pjanda1 |
I have a pair of BIB's with Hemp Acoustics FR8's, and I think they make fantastic HT speakers. I'm getting solid bass to 30hz; which is plenty for me. It may be enough for you, too. If you are at all interested, try it! I previously had the Hemps in sealed enclosures (no HP filter) with a TL sub. I like the BIB's more. They do not need BSC (if anything <200-300hz is too high in level), as any other enclosure would, so you save some efficiency. Horn loaded bass is a very unique thing, too.
I would not use an FE206E or the Audio Nirvana in an enclosure other than a horn, unless you include a HF shelving circuit in addition to BSC. The HF rise (due to the shorting ring) is intolerable to me in such an enclosure. The FE207E, Hemp, Creative Sound, Neophone, or Jordan would all work fine without HF attenuation. |
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| planet10 |
| quote: | Originally posted by clearwaterms
... or the FE206 just a simple sealed cabinet.... |
FE207 would make more sense
dave |
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| clearwaterms |
| quote: | Originally posted by planet10
FE207 would make more sense
dave |
why? also, are there any simple horns out there, front 'mouth' top or back wont work in my situation. By simple I mean all butt joints? |
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| planet10 |
The 207 has higher Q and works better in non-horn boxes than the 206.
For the 206 in a butt joint horn, you are left with either the Fostex recommended 208 horn, which is known to work really well, or Sachico (the Nagoka-style member of the Spawn family for 8" drivers). Both these have front mouths (the latter has 2).
At 6 ft tall & 15" wide Sachico could at least be disguised as part of the house structure. The pathway is wide enuff that a cat could make a nest up inside thou (at least until you whack em with something like the 5th symphony at significant volume.
dave |
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| clearwaterms |
| what about the 208 enclosure? |
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| planet10 |
| quote: | Originally posted by clearwaterms
what about the 208 enclosure? |
That is the one recommended (here at least) for the 206 (over the "official" 206 enclosure.
dave |
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