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Lexicon CP-1 Digital Environment Surround Processor Questions Answered!

jhaan92

A Work In Progress...
This thread is to help answer the questions that many of you AK'ers have had regarding the Lexicon CP-1 Digital Environment Surround Processor:



Okay, many of you have heard of these units, and were around when they were first introduced. I first heard of them when I read the review in Stereophile, and two weeks after that, our store began stocking the CP-1 & 2 units (I worked for Market Speaker-now Midwest Speaker), and they had an incredibly high price tag of nearly $1500! Nobody wanted to really spend that kind of money on a unit, and most of them didn't really grasp how it worked, so I have decided to explain it to everyone, as I get quite a few emails asking me how this thing works, so here goes....

Most of us audiophiles know that Lexicon is well-known for their reverb and echo equipment in the late 70's and early 80's. They are really well-known and respected in the studio world, but make no equipment for the home audio industry, until 1986 came around.

You see, with their Dolby Pro-Logic surround design and effects processors, they did tests on real-room environments and designed the effects based on their findings, and with the 5.1 & 7.1 surrounds on the CP-1 units, it also has a very accurate Auto-Azimuth Correction circuit that corrects time-delay errors, and I found it to be far more accurate that the Yamaha DSP 300 (I think that is the model number, I'm not sure....getting old sucks!), and had a smoother delivery as well.

Now, not many people realize that the CP-1 is still a usable unit in this day and age, even though Dolby DTS has eclipsed Pro-Logic, and that most movies are no longer recorded with Pro-Logic (DVD's are a prime example). There is an option on the Lexicon that allows you to put it into two channel mode, called PANORAMA, and with only two speakers (left & right but you can use more than that!), give the music the impression that not only are you running a center channel (if you don't have one, there is a button on the back of the unit to shut the center channel off-called PHANTOM IN/CENTER OUT), when you don't actually have one-if you do, you can use it. However, it's effects/sounds are unknown to me at this time(I only have a two channel setup at the current moment).

With that said, the whole design of the PANORAMA mode is to eliminate "stereo crosstalk" which is what the Carver Sonic Hologram Generator (offered on both the C-4000/C-1 Preamplifier and as a seperate unit), does, but has a better adjustment concept. With the Carver design, you have to find the sweet spot and adjust your room/EQ/Volume accordingly. With the CP-1, it has a setting in the PARAMETER menu that adjusts what is called the LISTENER POSITION (where you are sitting), and allows you to adjust the negative imput signal that is employed to eliminate crosstalk, so that the soundstage doesn't sound like it is coming from one side or another. It has a calibration option, and I use it to get it generally set up, but after I get things rolling good, I like to use my ears to fine tune the system. It also has a SPEAKER ANGLE setting that allows the unit to compensate for close speaker placement, or wide speaker placement.

Basically, the adjustments on this unit are infinite. I see these units going dirt cheap just due to the simple fact that nobody understands how they operate, and how much of a benefit (in my opinion) they have on the listening pleasure that you might have.



Here is a direct quote from the owners manual:

"When a listener is in the correct spot, the PANORAMA mode provides an almost ideal re-creation of the original recording space. It works by using digital processing to cancel the crosstalk between the listener's ears, effectively spreading the sound from the two front loudspeakers in a wide arc in front of the listener. With the optional addition of rear speakers, PANORAMA can be almost spooky in it's realism."



Most people didn't understand how this unit actually worked until they listened to it after it was set up. I did not sell many of these units, due to it's price tag, but those that could afford it were hooked as soon as I demonstrated it in one of the listening rooms. The design of this unit not only enables you to use it in a processor loop, but also allows you to use it as a unit go-between for your amp and pre-amp-essentially turning the Lexicon into a Pre-amp, and it has the capability to control all of the volumes for each of you power amplifiers (should you use it for Pro-Logic), but I personally preferred to use it in the processor loop.

These units are not all too uncommon, as I see one on ebay about once every few weeks....the only problem is that you HAVE to make sure that it comes with the Lexicon (NOT A UNIVERSAL, AND I MEAN IT!!!) remote, otherwise you cannot access any of the options on this unit (there has to be a pitfall somewhere!), therefore rendering the unit generally worthless-unless you happen to know someone who has a remote. These units go really cheap on ebay (usually at about 30 to 70 dollars apiece, depending on their condition). However, people are finally starting to realize what this unit is capable of, and the price is starting to climb on these things. It's like the dbx equipment. I bought my 3BX III Dynamic Range Expander about 4 years ago, and I only paid about $125 for it. Now you can't touch one for less than $400, and even then it is the unit might be in kind of rough shape.

On another note, you can download the owners manual for this unit and get a more in depth reading at their website, www.lexicon.com Make sure that you look up the CP-1, as the CP-2 does NOT have the LCD display, nor does it have nearly as many options that it's big brother has.

Now, I hope that this answers the questions that any of you had about this unit. If it doesn't, just get the manual from the website-it's free! I suppose that you could post a reply and I could answer if you would rather talk to me instead of a corporate website.



Happy Listening,

Jason :music:


PS-If you can get the CP-1 Plus instead of the standard CP-1, it is worth the price...I own the Plus edition (it has internal firmware upgrades-which is rare).
 
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I hope that I don't put you to sleep (in retrospect to writing this long-ass article!)




Jason
 
Very informative Jason,
I don't think there is much of a following for this type of old gear. I have a CP 1+ & CP-2. I do like them better than the Kenwood (SS 79), & Yamaha (DSP-1). You are 100% correct about needing the original remote for set up/calibration.
I run the CP 1+ for the rear channel in my Pioneer rig thru an SA-9500 into HMP 500's. It gets little use anymore, so the phantom idea is something to play with in the 2 channel system that is now my daily driver.
Steve
 
Well Steve, I think that you are right about the whole following idea, but yet I still see Carver C-9 Sonic Hologram Generators go for over a hundred bucks, and I can't justify that in any way. I have a Carver C-4000, and it comes with the Sonic Holography (wasn't sure if you knew that or not...), and I don't use it, nor do I use the Peak Unlimiter (Carver's answer to the dbx Dynamic Range Expander). I tried the Sonic Hologram, and I felt that the Lexicon's design was not only better thought, but had a better execution, with more natural sounding effects.

Which leads me to the whole point of this discussion; I don't think that many people understand how this unit worked, which lead me to write this long-winded article, explaining it as best as I could, but I feel that the owners manual does that better. I think that the Carver design was very innovative when it came out, but Lexicon made some much needed improvements on it. Not only that, but it has a A/D to D/A circuit design (Analog to digital, and back), which allows the Lexicon to pretty much do whatever the hell it wants to while it is in the digital domain.


Oh, before I forget, watch out for the battery backup in the Lexicon, they do tend to die after a while. I replaced mine with a 2AA setup and soldered it to the board in place of the button battery (I think that the original was a CR2035, but I can't be totally sure), and it works like a charm. RadioShack sells them for just a couple bucks, so I thought that I would toss that out there!




Thanks for the reply!

Jason
 
Ok. Thanks for leaving this open. I have a CP1,2 and 3 here. No original remotes for any.
I have not been able to get jack out of the 2 with a Harmony 900
Waiting to see if Lexicon will send Pronto Hex Codes as requested by Logitech. Also just found a deal on a remote for one of them. I'll update as i go, but one guy said keep the remote. He wasn't kidding.
 
I have successfully set up control of my CP-1 with a very mainstream and affordable Inteset remote control...CP-1 works great! Happy to answer questions if any need an assist.

When you say "successfully set up control" does that include the ability to calibrate individual listening position for L&R panorama mode, select speaker angle settings, rename user modes or adjust the effects level? How about input level/balance, crossover freq or rear delay times?
How were you able to establish complete control with the Inteset 4-in-1 Universal Learning remote?
 
Yes, that is correct. I started slowly, by just programming the volume to see if that worked, which it did. I used the thread at remotecentral.com (see below) to get started, and then built up to the "Param" button which is the key to calibrating a number of features. Have not tried speaker angle yet, yes input level/balance, etc all seem to work. Try thread titled "lost lexicon cp-1 remote", and feel free to hit me up with any questions. On the whole, it took me a few nights to program 25 different commands.
 
Yes, that is correct. I started slowly, by just programming the volume to see if that worked, which it did. I used the thread at remotecentral.com (see below) to get started, and then built up to the "Param" button which is the key to calibrating a number of features. Have not tried speaker angle yet, yes input level/balance, etc all seem to work. Try thread titled "lost lexicon cp-1 remote", and feel free to hit me up with any questions. On the whole, it took me a few nights to program 25 different commands.

Good to hear, just an FYI, I used to sell these units back in 1987 and own 3 of them.
 
I'm mainly a two channel guy but recently picked up a Outlaw 950 pre/processor and a six channel NAD 906.The outlaw came with remote, instructions and original packaging.Im not familiar with this area of audio.Im also not much for all the processing soundfields.Seems like a lot of work in the setup.Isnt this HT type stuff out of date, meaning not many even have HT setups anymore.Forgive my ignorance but I just don't know much about this level of HT and am wondering if I should just move on from it now.
 
I'm mainly a two channel guy but recently picked up a Outlaw 950 pre/processor and a six channel NAD 906.The outlaw came with remote, instructions and original packaging.Im not familiar with this area of audio.Im also not much for all the processing soundfields.Seems like a lot of work in the setup.Isnt this HT type stuff out of date, meaning not many even have HT setups anymore.Forgive my ignorance but I just don't know much about this level of HT and am wondering if I should just move on from it now.

So as to not leave you hanging...
From what I've seen HT is still very much alive and when done well can be quite enjoyable. Yes, it does require some amount of set up time, more than 2-channel but the effects of the end result can be pretty cool. I rarely used my old HT system for music, always for movie.
I too am a 2-ch guy (x4). Although I sold HT back in it's infancy (the 80s) By 1995 I was done with it and only had a simple Technics 5.1 receiver, plus by that time pro-logic was on the way out in favor of the new flavor. It is important to properly install and set-up (calibrate if you will) the enviroment and equipment. For those I have set up and others that have been set-up properly the effect is pretty wowing. On the otherhand I've heard systems that sound horribly disproportionate and unnatural. There are a number of people here that have some extremely nice HT systems that sound sublime and that's probably because they get "sound" and how it works. Unfortunately I dont think you'll get the answers you seek from this thread.

I'm no longer in that game and don't have the room to set up what I think is good, plus I have enough hobbies to spend my meager income (read retired) on. One tip I can give you is to be sure and timbre match the speakers; in others words the speakers should all be relatively the same sounding. This timbre matching allows the listener to experience the illusion of sound movement seamlessly from one speaker to another. I'm sure there's a multitude of different ways to accomplish this result with DSP probably being one of them. Back in the day of this dinosaur it was easier to use the same mid-bass, midrange and high freq drivers all the way around. Quite often our installs were custom requiring us to build speakers into the walls, existing cabinets, ceiling etc. Typically we used domed mids and tweets from Dynaudio, Morel, Vifa, Seas and ADS as they had great dispersion and a little more forgiving when it came to placement.

Don't give up on HT just understand it may not give you what you expect from your 2-channel, after all it is a different machine. Best of luck with your new toy.
 
So as to not leave you hanging...
From what I've seen HT is still very much alive and when done well can be quite enjoyable. Yes, it does require some amount of set up time, more than 2-channel but the effects of the end result can be pretty cool. I rarely used my old HT system for music, always for movie.
I too am a 2-ch guy (x4). Although I sold HT back in it's infancy (the 80s) By 1995 I was done with it and only had a simple Technics 5.1 receiver, plus by that time pro-logic was on the way out in favor of the new flavor. It is important to properly install and set-up (calibrate if you will) the enviroment and equipment. For those I have set up and others that have been set-up properly the effect is pretty wowing. On the otherhand I've heard systems that sound horribly disproportionate and unnatural. There are a number of people here that have some extremely nice HT systems that sound sublime and that's probably because they get "sound" and how it works. Unfortunately I dont think you'll get the answers you seek from this thread.

I'm no longer in that game and don't have the room to set up what I think is good, plus I have enough hobbies to spend my meager income (read retired) on. One tip I can give you is to be sure and timbre match the speakers; in others words the speakers should all be relatively the same sounding. This timbre matching allows the listener to experience the illusion of sound movement seamlessly from one speaker to another. I'm sure there's a multitude of different ways to accomplish this result with DSP probably being one of them. Back in the day of this dinosaur it was easier to use the same mid-bass, midrange and high freq drivers all the way around. Quite often our installs were custom requiring us to build speakers into the walls, existing cabinets, ceiling etc. Typically we used domed mids and tweets from Dynaudio, Morel, Vifa, Seas and ADS as they had great dispersion and a little more forgiving when it came to placement.

Don't give up on HT just understand it may not give you what you expect from your 2-channel, after all it is a different machine. Best of luck with your new toy.
So as to not leave you hanging...
From what I've seen HT is still very much alive and when done well can be quite enjoyable. Yes, it does require some amount of set up time, more than 2-channel but the effects of the end result can be pretty cool. I rarely used my old HT system for music, always for movie.
I too am a 2-ch guy (x4). Although I sold HT back in it's infancy (the 80s) By 1995 I was done with it and only had a simple Technics 5.1 receiver, plus by that time pro-logic was on the way out in favor of the new flavor. It is important to properly install and set-up (calibrate if you will) the enviroment and equipment. For those I have set up and others that have been set-up properly the effect is pretty wowing. On the otherhand I've heard systems that sound horribly disproportionate and unnatural. There are a number of people here that have some extremely nice HT systems that sound sublime and that's probably because they get "sound" and how it works. Unfortunately I dont think you'll get the answers you seek from this thread.

I'm no longer in that game and don't have the room to set up what I think is good, plus I have enough hobbies to spend my meager income (read retired) on. One tip I can give you is to be sure and timbre match the speakers; in others words the speakers should all be relatively the same sounding. This timbre matching allows the listener to experience the illusion of sound movement seamlessly from one speaker to another. I'm sure there's a multitude of different ways to accomplish this result with DSP probably being one of them. Back in the day of this dinosaur it was easier to use the same mid-bass, midrange and high freq drivers all the way around. Quite often our installs were custom requiring us to build speakers into the walls, existing cabinets, ceiling etc. Typically we used domed mids and tweets from Dynaudio, Morel, Vifa, Seas and ADS as they had great dispersion and a little more forgiving when it came to placement.

Don't give up on HT just understand it may not give you what you expect from your 2-channel, after all it is a different machine. Best of luck with your new toy.
Thanks for the info.I just need to get some more education on this type of audio to decide if it is worth my effort.Like you have a meager income (I'm not far behind you) I have meager time so I am not sure if I want to expend it on this..You mentioned timbre matched speaker I also have a Energy HT speaker setup with two front, a center a sub and only one rear.Thanks for the info. I am more than likely going to move all this on to someone who has the time and energy for this.
 
Thanks for the info.I just need to get some more education on this type of audio to decide if it is worth my effort.Like you have a meager income (I'm not far behind you) I have meager time so I am not sure if I want to expend it on this..You mentioned timbre matched speaker I also have a Energy HT speaker setup with two front, a center a sub and only one rear.Thanks for the info. I am more than likely going to move all this on to someone who has the time and energy for this.

If your in the process of moving on then I would recommend get what you can out of the the equipment you have and concentrate your efforts on what it is you really want to do, if that's 2-channel great, if not then let's move into a more solid plan as to what you want from your multi channel equipment. As far as the amount of effort you wish to invest only you can answer that question. Like I previously said, I'm a 2-ch guy with limited multi channel experience. If your iffy about HT that's okay, I get it.

A left, right, center and sub are a start, the sub is the last concern in the chain. Two sides and at least rears are very important to a proper surround sound.
 
I've been doing the HT thing for years!! And I have finally found that "Timber" matching of speakers is key! And timber matching speakers ... does not really ply well with collecting vintage speakers??

5.1 is my freaking limit! And I can't fit for one Five Mach One's in my living room?? Much less uh 7.1, 9.1 11.1 or god knows where it is today with the "Object based sound??" But I thought it was something like 34 speakers?? That can't be right??

So whatever, I quit trying at 5.1 myself and even to do that properly I'd have to use my LX 5's and even those would look kinda odd strew about the living room?? That kinda crap has a pretty low WAF!

And now my latest score and flavor of the year are my Sansui SP1200's??? And thanks to reconfiguring uh everything and adding a eight foot credenza ... I could conceivably get away with three of such sized speakers, across the front and still stay with my partner ... but I could not add more speakers of that size???

And there is a sub in the corner, so space is a constraint with "real speakers." But I was running all of my assorted HTR's in two channel mode in the living room day to day and I started using "Phantom Mode" for the front. But I disconnected the two smaller rears they were not an issue (aside from triber matching) but the hassle factor (long runs of wire) lead me to ditch them.

Not to mention actually understanding how these thing works (HTR"S) is a PIA! So screw it, I just use two channel mode with them and call it day. My better half, is not gonna turn on a Preamp, and Power Amps ... just to watch TV?? So better stuff notwithstanding ... I have to use a HTR, cuz you know ... one button, two channel mode and call it a day. :)
 
Hi. Thanks for sharing and nice thread to see. I just replaced some of the 1000 uf power supply caps in my unit. It had a hum and now it doesn’t hum. Anyways I bought it for the center channel and remote feature so I can control my 2ch setup from the couch if my mcintosh remote unit dies. I’m still working on understanding the effect features. I will use it my garage setup until then. The manual is pretty daunting so I am just going to do it by ear for now.
 
Reviving an older thread, but thanks for starting it, @jhaan92 !

You sold me on picking up this unit! I couldn't find a CP-1 plus unit, but did find a CP-1 that is "new" still in it's box with all the packing, including the original remote, all for $100!

Super excited to play with this new toy! I'm a 2-ch guy, as I just don't watch much TV or even stream movies, so pretty exclusively music.

On my retired budget, I've slowly been picking up items. I scored a couple of JBL L1's for $50 that look all but brand new, and 2 Technics SP-25's and a SP-15 in a university's auction of their NPR station equipment. I'll keep the one with all the parts. The other 2 need either a cartridge for the arm (the 25, which has a plinth and an ATP 12-T), or both arm and cartridge for the 15, and I'll get around to selling them eventually.

I've a Yamaha R-S202 in new condition, which I picked up for $25! I'm keeping an eye out for a different amp, but I do like the built-in Bluetooth for streaming.

Anyway, thanks for providing the info here, to everyone! I love Audiokarma!
 
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