Hi All, I just got a Luxman A-2003 tube crossover and know nothing about it. I can't find very much about it on the web. It was a kit that did not sell very well as far as I can tell. Cheers.
Is it a Luxkit? I have a bunch of Luxman/Luxkit brochures stashed around here somewhere. Most they probably will have is a few specs and possibly crossover freqs. I picked these up in Japan (Okinawa actually) back in the 80s, and yes they are in Japanese. I'll look around if you are interested.
Craig
Craig
That would be great Craig. It does not say "Luxkit" on it but the lit I've found so far (which is not much) has pix just like this one. On the front face plate it does say "customed by Luxman" so it might be factory. I don't know.
There were several Luxkit versions of the factory made Luxman. I built a Luxkit A3034 which was actually a Luxman CL34. I also have a CL32 which also had a kit version, A3032. You can usually tell by the workmanship inside unless it was built by someone well versed in assembly. I'll see what I can find, don't remember seeing a crossover but never really paid much attention because I've never had a use for one. Have you been on the Luxman Yahoo Group forum? I know it's rough trying to find Luxman info, if I hadn't been where I've been I would know far less. What was cool about their line of kits was not only was there audio kits but test equipment kits too, Japanese Heathkit! Still regret not getting more whilst there.
Craig
Craig
Yep, I sent a message to the Yahoo forum asking to joint but I've gotten no response so I assumed it is not active. The workingship on this piece is factory level. I'd be surprised if it was assembled by an individual.
Some of those Yahoo Groups seem take a while, especially if the person in charge is gone. Be patient.
djn,
I went thru all of my Luxman stuff and no crossover to be found. All of my lit. dates from 81-88, so either it's before '81 (probably) or after '88, sorry.
Just looked on Audiogon and it's from 1973.
Craig
djn,
I went thru all of my Luxman stuff and no crossover to be found. All of my lit. dates from 81-88, so either it's before '81 (probably) or after '88, sorry.
Just looked on Audiogon and it's from 1973.
Craig
You can find some useful informations about the LUXMAN A-2003 tube x-over here:
ACTIVE LOUDSPEAKER SYSTEM: Subwoofer, Construction, Cabinets, Electronic Filter/Tube Crossover, Amplifiers, Units.
(scroll down to the very bottom of the page)
And you could also order a full A-2003 manual with many extras from the same source.
ACTIVE LOUDSPEAKER SYSTEM: Subwoofer, Construction, Cabinets, Electronic Filter/Tube Crossover, Amplifiers, Units.
(scroll down to the very bottom of the page)
And you could also order a full A-2003 manual with many extras from the same source.
LUXMAN 2003 TUBE 3 way X-over
RE the LUXMAN 2003 tube X-OVER :
They MADE 2 versions, (factory built & kit ) and 2 models ( 3 way #2003, and a 2 way # 2002 from 1975- 1978 ? I was fortunate to buy a factory fresh 3 way unit in 1978 --AND THEY ARE RARER THAN A HOUNDS TOOTH !
Luxman later produced a S.S. version, loaded and crammed to the gills.... me no likie, as impossible to upgrade or even service.. like todays cars ... besides NOTHING beats the maxed tube set up IMO...
Of course there is the CLASSIC Marantz 2 way tube xover ( 2 chassis with seperate power supplies no less ) smart -- and they command respect and BIG $$$ also--- a real fine 2 way, but are JUST to Limited for my 4 way tri-amp BIG system -) ditto ....that also goes for the ARC 2 and 3 way TUBE units, as they have level controls on the rear, a real hassle, and dont have slide out adjustable X-over cards ( a snap with Luxman ) and I WONT waste my ears listening to any S.S. types, ( Accuphase, Pioneer,...) as for me, HAVING all the control and options for ANY x-over points, levels, etc YOU WANT= LUXMAN 2003 XOVER is IT- cause it has it all for ya !
In my opinion, the LUXMAN all tube ( 8 x 12AU7 ) 3 way/ 2way/ & mono sub Crossover --- is the SINGLE most important component in a SERIOUS audio system-
NOW especially if modified with high quality ( PI0 ) paper in oil caps ( 22 pcs ) in addition to the X-over point caps ( 16 pcs ) - AS the original caps ( polystyrene ) and polyproplene are crappy and cannot compare with PIO, JENSEN and other TOP CAP manufactures of today - and also isolated power x-frmer - and replaced signal wiring thru out ( litz pure copper/ Ptfe dialectric ) and gold RCA's jacks installed ( 8 pcs )
OH ...... and dont forget PREMIUM quality MULLARD tubes --- or TELefunkins if you must for the ' edge ' they provide ( 8 pcs ) and you have ALL YOU NEED FOR GAIN/ LEVELS low, mid, high,Left & Right CONTROL/ X-OVER POINTS / SLOPE * and viola = elimination of ALL the PASSIVE X-OVER ' tone/dynamics/bandwidth/IM distortion/damping factor/ TONE SUCKER devices ( choke, caps, resistors, pads, wire, connections --- uuugh )
I find it to be the MOST effective/ easy* device to bring the BEST your gonna GET out of your component system-- and once experienced, even just 1/2 right---- you will NEVER look at PASSIVE x-over again ... for any serious system--
* Luxman slopes @ ( 6 & 12 db ) does not offer the higher ( 18 & 24 db )slopes BUT ... if you have to HAVE 24 db slopes --- it will hurt phase relationships a x-over points MORE-- and to me ?? It also means you got the wrong mix of speakers or x-over points for starters -- i personally find the 12db slope ' sufficient ' for my system-- AND- by adjusting low pass & high pass x-over points to either OVERLAP OR UNDERLAP at times, AS I DO --- just a twist on the FRONT panel controls - and your set
AND it is IDEAL device to taylor CD, vs Vinyl, Tape and master to mastering differences with various source material to be played --with a couple adjustments to levels & x-0ver pts
NEGATIVES > the only bummer is with the 'pull-out' capacitor cards ( cheapo tin plated ) contacts for critical x-over points selected ....SO .... U got to keep em REAL CLEAN and TIGHT --- and especially if near ocean/ mositure conditions -- OR you can replace with gold or silver versions ..if you find em.... ( 8 pcs ) ok so denatured alcohol and deoxit 5 --- 2x a year ....
THE ONLY REAL PROBLEM ---having the right support componets (woofs/ mid/ tweets spkrs) and power amps ( tubes for mids and tweets, and S.S> @ 200hz down- and KNOWING how to adjust and set it up for MAX performance in YOUR system -
the REWARDS>>>>DYNAMICS=NO tone suckers above = amp to sprk period / bandwidth control * / distortion= virtually non existent even @ performance levels 95-110 db @ 12 ft in my system- the closet to live I have ever heard and FELT in 40 yrs of ' buying and trying ' it all
the occasional ebay listing 1 or 2 a year - ebay has 2 way listing of KIT version - very very clean -- but will need mods to really perform it's best for you...so dont just settle for STOCK unit IF you want to really hear what it can DO --
The 23 page owners manual is VERY GOOD, and covers ALL aspects of operation and setup- and is very very important to have to properly understand and USE this gem- including schematics, component layout, and even PC circuit traces no less ---sweet and is available on line and worth it.
enjoy
tube dog
ps - as a musican, (of 45+ yrs ) - I have yet to hear S. S. anything ( pre amp, power amp, etc ) regardless of cost, begin to deliver the REAL sound that TUBE systems deliver all day long = cause they can't -- for a lot of reasons-- geee ever wonder why the BEST mics in the studio are ALL tube ?? ever see a guitar player use a S.S. amp--- ??? no.... there are tube arent they.?... wonder what they know ? -- sorry, s.s. has its place = 200 hz and below into mono block amps ---- car stereos and boom boxes ....
RE the LUXMAN 2003 tube X-OVER :
They MADE 2 versions, (factory built & kit ) and 2 models ( 3 way #2003, and a 2 way # 2002 from 1975- 1978 ? I was fortunate to buy a factory fresh 3 way unit in 1978 --AND THEY ARE RARER THAN A HOUNDS TOOTH !
Luxman later produced a S.S. version, loaded and crammed to the gills.... me no likie, as impossible to upgrade or even service.. like todays cars ... besides NOTHING beats the maxed tube set up IMO...
Of course there is the CLASSIC Marantz 2 way tube xover ( 2 chassis with seperate power supplies no less ) smart -- and they command respect and BIG $$$ also--- a real fine 2 way, but are JUST to Limited for my 4 way tri-amp BIG system -) ditto ....that also goes for the ARC 2 and 3 way TUBE units, as they have level controls on the rear, a real hassle, and dont have slide out adjustable X-over cards ( a snap with Luxman ) and I WONT waste my ears listening to any S.S. types, ( Accuphase, Pioneer,...) as for me, HAVING all the control and options for ANY x-over points, levels, etc YOU WANT= LUXMAN 2003 XOVER is IT- cause it has it all for ya !
In my opinion, the LUXMAN all tube ( 8 x 12AU7 ) 3 way/ 2way/ & mono sub Crossover --- is the SINGLE most important component in a SERIOUS audio system-
NOW especially if modified with high quality ( PI0 ) paper in oil caps ( 22 pcs ) in addition to the X-over point caps ( 16 pcs ) - AS the original caps ( polystyrene ) and polyproplene are crappy and cannot compare with PIO, JENSEN and other TOP CAP manufactures of today - and also isolated power x-frmer - and replaced signal wiring thru out ( litz pure copper/ Ptfe dialectric ) and gold RCA's jacks installed ( 8 pcs )
OH ...... and dont forget PREMIUM quality MULLARD tubes --- or TELefunkins if you must for the ' edge ' they provide ( 8 pcs ) and you have ALL YOU NEED FOR GAIN/ LEVELS low, mid, high,Left & Right CONTROL/ X-OVER POINTS / SLOPE * and viola = elimination of ALL the PASSIVE X-OVER ' tone/dynamics/bandwidth/IM distortion/damping factor/ TONE SUCKER devices ( choke, caps, resistors, pads, wire, connections --- uuugh )
I find it to be the MOST effective/ easy* device to bring the BEST your gonna GET out of your component system-- and once experienced, even just 1/2 right---- you will NEVER look at PASSIVE x-over again ... for any serious system--
* Luxman slopes @ ( 6 & 12 db ) does not offer the higher ( 18 & 24 db )slopes BUT ... if you have to HAVE 24 db slopes --- it will hurt phase relationships a x-over points MORE-- and to me ?? It also means you got the wrong mix of speakers or x-over points for starters -- i personally find the 12db slope ' sufficient ' for my system-- AND- by adjusting low pass & high pass x-over points to either OVERLAP OR UNDERLAP at times, AS I DO --- just a twist on the FRONT panel controls - and your set
AND it is IDEAL device to taylor CD, vs Vinyl, Tape and master to mastering differences with various source material to be played --with a couple adjustments to levels & x-0ver pts
NEGATIVES > the only bummer is with the 'pull-out' capacitor cards ( cheapo tin plated ) contacts for critical x-over points selected ....SO .... U got to keep em REAL CLEAN and TIGHT --- and especially if near ocean/ mositure conditions -- OR you can replace with gold or silver versions ..if you find em.... ( 8 pcs ) ok so denatured alcohol and deoxit 5 --- 2x a year ....
THE ONLY REAL PROBLEM ---having the right support componets (woofs/ mid/ tweets spkrs) and power amps ( tubes for mids and tweets, and S.S> @ 200hz down- and KNOWING how to adjust and set it up for MAX performance in YOUR system -
the REWARDS>>>>DYNAMICS=NO tone suckers above = amp to sprk period / bandwidth control * / distortion= virtually non existent even @ performance levels 95-110 db @ 12 ft in my system- the closet to live I have ever heard and FELT in 40 yrs of ' buying and trying ' it all
the occasional ebay listing 1 or 2 a year - ebay has 2 way listing of KIT version - very very clean -- but will need mods to really perform it's best for you...so dont just settle for STOCK unit IF you want to really hear what it can DO --
The 23 page owners manual is VERY GOOD, and covers ALL aspects of operation and setup- and is very very important to have to properly understand and USE this gem- including schematics, component layout, and even PC circuit traces no less ---sweet and is available on line and worth it.
enjoy
tube dog
ps - as a musican, (of 45+ yrs ) - I have yet to hear S. S. anything ( pre amp, power amp, etc ) regardless of cost, begin to deliver the REAL sound that TUBE systems deliver all day long = cause they can't -- for a lot of reasons-- geee ever wonder why the BEST mics in the studio are ALL tube ?? ever see a guitar player use a S.S. amp--- ??? no.... there are tube arent they.?... wonder what they know ? -- sorry, s.s. has its place = 200 hz and below into mono block amps ---- car stereos and boom boxes ....
LUXMAN TUBE CROSSOVER ALERT / WARNING--
=( fire up the iron and get a cold one )
MY EARLIER BLOG mentioned the " negatives" with this splendid LUXMAN TUBE 3-way crossover (model #2003)- being the cheapo tin plated removable capacitor cards- having POOR and troublesome connection -- often failing -- and the need to keep them cleaned and checked periodically -- as they would simply fail to work-- fail to high pass and low pass filter !!!!--- WELL for NEW YEARS EVE..... i had finally " HAD IT " with these inferior cheap tin plate block connectors, and was unwilling to trust gold plate replacements as the " cure" and decided to ' hard wire ' the cap cards in place--------------oh what a difference--------oh who knew ??--- turns out the ' MOLEX" block connectors are NOTORIOUS failures ( and were the source of many similiar electrical problems found in the 1970's ....used in mixing boards and automobiles electrics-- !!!! ==they are sonic DEATH to your LUXMAN = Remove and either hard wire or replace with premium gold plated block connectors===== but remove them ---- ( my tech engineer friend mentioned that the molex connectors were known to have killed the Detroit auto industry --being plaugged with electrical failures ---they are despised in the industry !!!!!!!!!!!!!!!!
DOWN-SIDE --- yes it will require many hours ( 4-6 hrs ) to carefully remove the 8 molex block connectors - and either replace or hard wire ( as i did )- but the Luxman offers +/- 5/8 octave user adjustment for ' fine tunning' -- so having the exact perfect freq cards is not a problem-- U can shift up or down quite a bit to get the perfect blend/balance dialed - in.
MOD- I removed all 8 molex block connectors -from PC board- then, using the original Luxman removable capacitor cards, installed 4 # 16 SOLID copper lead wires thru the molex connectors - leaving a 1/4" lead wire protruding -- re-insert the orig cap card--THRU THE DESOLDERED PCB-- and solder it directly to the PC board-- viola --
the AFTER ???-- The image is SOLID - the ' punch ' dynamics way improved- the micro detail vastly improved--- lyrics that were blurred or masked are ' there ' RIGHT THERE ! --- the ' slam' factor and punch are FELT !!!-- = dynamics huge-- NO COMPARISON PERIOD--- HUGE do it --- god i wish i had done this 30 years ago when i bought the luxman---- it has always bothered me -- the Achillies heal of the luxman--the MOLEX block connectors --- get rid of em ASAP and enjoy what you paid for !
cheers
tube dog
ps-- next up -- re-cap 30 yr old power supply electroyltics caps ( 4 ), and upgrade diodes with freds... stay tuned
BTW-- PICKED UP THE TAD 1201 12" GRAPHIC MIDS----FANTASTIC--- ULTRa neutral--- best midrange ever--- replaced the JBL 2202 alnico 12" mids--- no comparison--- they REQUIRE more power @ 16 ohm / and less efficient BUT --gezzzz louezz -- these are just what the doctor ordered-- ( my 4 way tri-amp system is detailed above in earlier blogs above here )
=( fire up the iron and get a cold one )
MY EARLIER BLOG mentioned the " negatives" with this splendid LUXMAN TUBE 3-way crossover (model #2003)- being the cheapo tin plated removable capacitor cards- having POOR and troublesome connection -- often failing -- and the need to keep them cleaned and checked periodically -- as they would simply fail to work-- fail to high pass and low pass filter !!!!--- WELL for NEW YEARS EVE..... i had finally " HAD IT " with these inferior cheap tin plate block connectors, and was unwilling to trust gold plate replacements as the " cure" and decided to ' hard wire ' the cap cards in place--------------oh what a difference--------oh who knew ??--- turns out the ' MOLEX" block connectors are NOTORIOUS failures ( and were the source of many similiar electrical problems found in the 1970's ....used in mixing boards and automobiles electrics-- !!!! ==they are sonic DEATH to your LUXMAN = Remove and either hard wire or replace with premium gold plated block connectors===== but remove them ---- ( my tech engineer friend mentioned that the molex connectors were known to have killed the Detroit auto industry --being plaugged with electrical failures ---they are despised in the industry !!!!!!!!!!!!!!!!
DOWN-SIDE --- yes it will require many hours ( 4-6 hrs ) to carefully remove the 8 molex block connectors - and either replace or hard wire ( as i did )- but the Luxman offers +/- 5/8 octave user adjustment for ' fine tunning' -- so having the exact perfect freq cards is not a problem-- U can shift up or down quite a bit to get the perfect blend/balance dialed - in.
MOD- I removed all 8 molex block connectors -from PC board- then, using the original Luxman removable capacitor cards, installed 4 # 16 SOLID copper lead wires thru the molex connectors - leaving a 1/4" lead wire protruding -- re-insert the orig cap card--THRU THE DESOLDERED PCB-- and solder it directly to the PC board-- viola --
the AFTER ???-- The image is SOLID - the ' punch ' dynamics way improved- the micro detail vastly improved--- lyrics that were blurred or masked are ' there ' RIGHT THERE ! --- the ' slam' factor and punch are FELT !!!-- = dynamics huge-- NO COMPARISON PERIOD--- HUGE do it --- god i wish i had done this 30 years ago when i bought the luxman---- it has always bothered me -- the Achillies heal of the luxman--the MOLEX block connectors --- get rid of em ASAP and enjoy what you paid for !
cheers
tube dog
ps-- next up -- re-cap 30 yr old power supply electroyltics caps ( 4 ), and upgrade diodes with freds... stay tuned
BTW-- PICKED UP THE TAD 1201 12" GRAPHIC MIDS----FANTASTIC--- ULTRa neutral--- best midrange ever--- replaced the JBL 2202 alnico 12" mids--- no comparison--- they REQUIRE more power @ 16 ohm / and less efficient BUT --gezzzz louezz -- these are just what the doctor ordered-- ( my 4 way tri-amp system is detailed above in earlier blogs above here )
hi everyone ! i'm in need of a little help right now and i'm hoping someone can help me... k... i just bought a luxman a-2003 tube crossover and i have no idea how to either hook it up or set it up. right now, i have a pair of klipsch rf-7ii horn speakers hooked up to an onkyo receiver (htrc-370) that i'm using as a preamp for 2.1-channel. (it's awesome becuase i can switch from 2.1 channel to 7.1 channel depending on if i'm watching a movie or listening to music) from the onkyo i have an audio research vt-50 powering my horns and a yamaha m-85 powering my mains. (passive biamped) now, i have an active tube crossover in the mail (lux a-2003) and i'm wondering how to set this up....(i know i have to bi-pass my speaker's internal crossovers) i also have an audio research sp-9 preamp sitting in the closet, and a vintage (50+years) old mono theater amp that's very clean and powerful (from what i've been told by the electronics guy i had "look at it"...) i'm really hoping to somehow put this into my system... but, i'm really wondering how to set up my new a-2003 crossover....can anyone help ? thanx !
hey ! i hope this thread isn't over yet !.....i just sent messages to yube dog and dgn...i'm hoping they're still around !....anyway, i just bought a lux 2003 and i have no idea how it works...so, if anyone out there can help i really would appreciate it !.. thanx ! kevin (an old ironworker that's totally electronically reterded !)
hey ! i hope this thread isn't over yet !.....i just sent messages to yube dog and dgn...i'm hoping they're still around !....anyway, i just bought a lux 2003 and i have no idea how it works...so, if anyone out there can help i really would appreciate it !.. thanx ! kevin (an old ironworker that's totally electronically reterded !)
Hi guys.
I am looking for parts to build the A 2003 Luxman active crossovers. If anyone has any spares on this model pleasr let me know.
I am starting this project from scratch.
Kind rgds
Francis Jansz
I am looking for parts to build the A 2003 Luxman active crossovers. If anyone has any spares on this model pleasr let me know.
I am starting this project from scratch.
Kind rgds
Francis Jansz
Look at page one of this thread. There is a guy selling all of the manuals and circuit board foil diagrams. I bought the package he was selling and it was very complete.
hi again !
i have both the A-2002 and the A-2003 x-overs.... (and the manuals) .... i haven't worked in 6 months and i might be interested in selling.... (i just sold a beautiful blemish free pair of 1981 klipschorns and i'm in shock and denial) ... i am starting work again this wednesday though ! ..... if i can help in any way get back to me.... right now the 2002 is just sitting around, the 2003 is hooked up to a pair of klipsch rf-7ii's and my audio research vt-50 and bryston 7b st mono's..... thing is.... i have that hooked up to my home theater and i don't need the x-over for movies.... willing to sell...
i have both the A-2002 and the A-2003 x-overs.... (and the manuals) .... i haven't worked in 6 months and i might be interested in selling.... (i just sold a beautiful blemish free pair of 1981 klipschorns and i'm in shock and denial) ... i am starting work again this wednesday though ! ..... if i can help in any way get back to me.... right now the 2002 is just sitting around, the 2003 is hooked up to a pair of klipsch rf-7ii's and my audio research vt-50 and bryston 7b st mono's..... thing is.... i have that hooked up to my home theater and i don't need the x-over for movies.... willing to sell...
Dear TUBE DOG, I just got hold of The Original LUXMAN A2003 Crossover Circuit, and I got no Technical Knowledge, I took the Manuel to a Friend TECHNICIAN who worked for LUXMAN from The Early Seventies till The Early Eighties, He stated that he has done lots of work on The LUXMAN's Tube POWER AMPS and on The Integrated amps, But never Saw The A2003 Active Circuit in The Past, He stated that he also worked on HARMON KARDON AMPS + JBL + ALTEC LANSING Tube amps, He said to leave The Circuit so he can study it , and Also Stated that He does not Like The PLUG IN CROSSOVER CARDs. . He advised me that he will build The Crossover for me, With more Better Quality Caps and Metal Film Resisters, and prefer to Make a Single Card PCB which will be around 8.5 Inches x 7.00 Inches and Prefer Using a 2 MM PCB Board with at Least 2 OZ Copper Tracings. And Can Set the Crossover at 500HZ Low Pass to 5000 Khz, He will work out The Prices on ALL The Components , AND get back to me within the next few weeks, He also stated that it wont be cheap, and to expect to spend at least $2000 on All Good Quality parts, he prefers getting most of the Parts from germany, And The USA + From Holland. and will get good quality RUSSIAN TUBES. I am waiting for the results.
Kind Rgds
Francis Jansz
Kind Rgds
Francis Jansz
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Luxman 3Way A2003 Active Crossover. I own this unit . I need The Wiring Diagram for The Variable Low Channel Switches . Your help will be appreciated
Hi, I just got a 100V A2003 but without the manual. Any gentlemen here willing to share your copy of manual? Very much appreciated.
I have the manual but I'm 3600 kms away working. If you still need it in a few months let me know. It is a lot to copy...
Yes I need the manual, appreciate in advance. I am putting together a 3 way system and planning to use the 2003.
Hello Tube Dog. You seam to know the most about this Luxman 2002/2003. I have a few questions I hope you can help me with. Have you any literature you will share or sell to me? Right now what I'd really like to know is,,, at crossover point, is it Butterworth (3db down at crossover point) or LR (6db down a crossover point). 1st order is always Butterworth (3db down) so am confused. I need to use 6db down 2nd order at crossover point for my woofer, and 3db down 1st order at crossover point for my full range driver. Such a simple but important piece of information. You said above or below, that you needed 16 capacitors for your 2003. It seems to me you'd need 12. My 2002 won't arrive here for me for two more weeks and want to start shopping for PIO capacitors. I'll be really grateful for a reply. The best, Ron