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bbno4
01-21-2004, 09:04 AM
I had just bought DX-1 for my JBL K2-S5500, but found that the paper box of the DX-1 shown that's for XPL-200. And the agent said that it's also fit for K2-S5500. But the cross over frequency of K2 is 800 Hz and XPL-200 is 250 Hz. Is the agent tell me the true?

4313B
01-21-2004, 09:31 AM
Originally posted by bbno4
I had just bought DX-1 for my JBL K2-S5500, but found that the paper box of the DX-1 shown that's for XPL-200. And the agent said that it's also fit for K2-S5500. But the cross over frequency of K2 is 800 Hz and XPL-200 is 250 Hz. Is the agent tell me the true? It sounds like you got the wrong crossover cards. We've been trying here on the forum to find XPL-200 cards for quite some time now! Not even the original designer has any information on them! Would you be able to take pictures of your cards and DX-1 and post them for us? Also, would you be able to tell us the values of the components on the cards? We would greatly appreciate it.

I will try to find the correct values (or cards) for the K2-S5500.

bbno4
01-21-2004, 10:08 AM
Hi Giskard
thanks for your reply. It's the last set of DX-1 from Hong Kong agent with special price HK$2000. The photo of the card will be a little bit later.

4313B
01-21-2004, 10:47 AM
I just got a reply back from Harman Service that all the DX-1 cards have been out of stock for years and they are also unable to find any schematics.

I still have a query into JBL engineering and will let you know what I find out from them.

bbno4
01-21-2004, 11:25 AM
Hi Giskard
Thanks for your help. The manual of new model K2-S9800 still asked consumer to buy DX-1 for Bi-Amp connection. There must be something wrong with the group of engineers of project K2.:confused:

Don McRitchie
01-21-2004, 11:36 AM
The problem is not with the engineers. There is an example of a similar problem with the Everest literature. When that speaker was designed, the engineers intended that there would be a subwoofer available for the domestic market due to the Everest's lack of deep bass response. The spec sheet refers to this and even lists the model number: the D50000. Subsequently, marketing decided that they would not pursue domestic sales and the subwoofer was dropped. However, the literature was never changed.

bbno4
01-21-2004, 11:45 AM
Hi Don
The problem is that the DX-1 had beed stopped to produce for years already. And the marketing still selling the old DX-1 with XPL-200 crossover card to the new K2 user.

Don McRitchie
01-21-2004, 01:06 PM
I doubt if JBL's marketing is selling them for that purpose. The fact that your local distributor only had one means that it is most likely old stock held by the distributor from the XPL200 days.

I know that the engineer behind the K2 speakers, Greg Timbers, used the DX-1 for development of the K2 systems. They have around a half dozen of them in their lab. They build custom cards when doing development work on prototypes. My guess is that JBL, at one time had the intention of putting into production one of the development cards but never did.

bbno4
01-21-2004, 11:59 PM
Hi Don
I agree that the theme of engineers of K2 is very good. But they had lack communicate with marketing & the customer service. Before I had bought the DX-1, I asked the customer service that the button of BI-Wire & Bi-Amp. They asked me to put the button on Bi-Amp position & no need to buy the DX-1. You know the result is all the four woofers had been burned. And i need to pay the full reconed fee :bomb: Now they asked me to buy the DX-1 with XPL-200 crossover card. you know the result is lack of low frequency. Because the crossover frequency is 250Hz in XPL-200. But the agent still said that DX-1 is also fit for K2, and they refused to refund:bomb:

sa660
01-22-2004, 05:19 AM
BBNO4,

I am very upset to hear all your trouble and can only advice you to write a later to the man in charge of Harman and JBL.
I will also strongly advise to obtain help from specialize magazine to warn other customers from the very bad service you have been suffering.
It sound to me that JBL us will make the upmost to repair this.

May be DON can help to point towards the right person to talk to about all your trouble.

Good luck

Don McRitchie
01-22-2004, 01:14 PM
bbn04

I too am sorry to hear about your problems. However, from your posts, I am not clear who may be at fault. You have to understand that there are at least three levels of involvement for which JBL is only one. Generally, your direct contact is a local dealer. The local dealer is an agent for the regional distributor and the regional distributor is an agent of JBL Consumer. These are all separate companies. If it is the retailer that made the promises that were false, then I would start there to try and contact the manager or ower of the firm. If they do not solve the problem to your satisfaction, then find out which firm is the regional distributor and complain to them. If you still don't get a satisfactory response, then contact JBL. Unfortunately, I don't have an appropriate contact for this type of issue at JBL. My contacts are almost all on the engineering side.

4313B
01-22-2004, 02:07 PM
There are two types of cards for the DX-1. The older DX-1 crossover cards are intended for systems such as the XPL200A. The newer crossover cards are intended for systems such as the K2-S5500. They are different cards.

The K2-S5500 card has a biased 6 dB/octave high pass and a conventional 18 dB/octave low pass coupled with a built in +4 dB low frequency EQ at 29 Hz. Nominal crossover frequency is roughly 800 Hz.

The older XPL200A card uses 12 dB/octave low pass and high pass filters set around 250 Hz.

bbno4
01-22-2004, 07:17 PM
it's the distributor advise me to set the button in Bi-Amp position, and they refused to accept it's the reason that the four woofers had been burned. And I had tried to get help from JBL consumer services in http://www.jbl.com and they also said that it won't be burned the four woofers even you don't have DX-1. what can i say?:bomb: As i know the DX-1 is only low frequency active crossover, the high frequency is passive. so that the horns of my K2 is not burned at that time.

bbno4
01-22-2004, 07:34 PM
Hi Giskard
How can i know which card my DX-1 is? But from the paper box a hand written stated that it's configured for XPL-200 and from my listening it's lack of bass, i surely believe that the card should be for XPL-200. But the distrubitor said that the card should be the same for K2 & XPL-200. what can i say:bomb:
It's a new distributor in HONG KONG (only about 6 years). XPL-200 is a very old model. When they become distributor XPL had been stop to produce already. And the DX-1 they had ordered is followed the order of K2. So there maybe a chance the false of US distributor also. I think the distributor of US and HONG KONG don't know that there are different cards:confused:

4313B
01-22-2004, 07:57 PM
"I think the distributor of US and HONG KONG don't know that there are different cards"

That is entirely possible. The "newer" card (~ circa late 1992) will have a biased high pass, meaning at some point it will have a voltage feed, unlike the older high pass card. The low pass card in both versions is schematically the same but the physical layouts may look different.

Can you tell us the values of the components on your particular cards?
Specifically:
C101 - HP
C103 - HP
C105 - HP
R101 - HP
R103 - HP
R105 - HP
C201 - LF EQ
C203 - LF EQ
C205 - LF EQ
C207 - LF
C209 - LF
C211 - LF
R201 - LF EQ
R203 - LF EQ
R205 - LF EQ
R207 - LF
R209 - LF
R211 - LF

If you can't find the following on your current cards then you definitely have the older cards and they will not work with the K2 series "out of the box" although they can be fairly easily modified to do so:
C113 - HP
C114 - HP
C115 - HP
C116 - HP

If there are jumpers in the spots for C201, C203, C205 then you don't have any EQ installed. The low pass cards can be easily modified to work with the K2-S5500.

pasadena
01-24-2004, 05:55 AM
Aha, finally good to hear from someone who has a DX-1 on their hands.

bbno4, sorry to hear about all your problems and hope you will sort your issues with JBL, one way or another. It's a shame to see how situations like these become a complicated one but I can see the point on both sides. I do agree that if the retailer told you to do something that damaged your speakers, I would be taking them for providing incorrect information.

If you are not happy with your DX-1 bbno4, I will be more than happy to buy the crossover from you. I will also pay for any shipping costs involved.

Nowadays you need to really read and look into the equipment you setup as retailers these days are not like they used to be 10-20 years ago where you got some real help and and down to earth service.

bbno4, I bought two DX-1 crossovers last year and they both came with no input/output crossover cards. JBL have not been selling DX-1's with input/output cards for at least 3 - 6 years now so if I were you, I would open up your DX-1 and check inside to see if they were shipped with any input/output cards?

If there are input/output cards installed, can you please take close-up photos of the cards and post them on this forum. It would be of great resource to have this sort of information available to all members of this group.

If there are no cards, I would be going back to the shop where you bought them from asking for a refund. Not before you take photos of the internals :).

If you check my previous posts in technical - "JBL XPL-200 and Rane AC24", "JBL DX-1 Input/Output Cards", "JBL DX-1 Crossover kits"; Marketplace - "Wanted: JBL XPL-200 Input/output cards for JBL's DX-1 external Crossover", "Wanted: Input/output cards for DX-1 Crossover", you will find a lot of information and photos of the DX-1.

If you especially check this last thread, "Wanted: Input/output cards for DX-1 Crossover", you will find an internal picture of my DX-1 crossover.

If you could post a picture of the enitre DX-1 circuit board, this would also be great.

Good luck.

Cheers
Pasadena

bbno4
01-24-2004, 06:02 AM
Hi all
Since I know nothing about electronic. here are some photos, wish can help both you and me

bbno4
01-24-2004, 06:08 AM
here some pics

bbno4
01-24-2004, 06:09 AM
pics

bbno4
01-24-2004, 06:11 AM
pic

pasadena
01-24-2004, 06:20 AM
bbno4,

Thanks for the photos, excellent.

What would be really great, is photo's of the input/output circuit cards. This involves popping off the cards from the board and turning them around and taking pictures of the card curcuit board themselves.

This is the missing information we are looking for in trying to find out what these cards are made up of.

If you could do these would be tops.

Thanks
Pasadena

bbno4
01-24-2004, 06:21 AM
pic

bbno4
01-24-2004, 06:24 AM
sorry, but how to take the cards out?

pasadena
01-24-2004, 06:29 AM
bbno4,

Judgeing by the pictures you have posted and looking at my dx-1, you either just grab the cards and pull them straigh off. Just remember which card came from what slot.

The cards will probably be seated quite well so you may need to pull a bit.

Otherwise, I notice there are two plastics screws on the edge of the cards. You can try to unscrew these which may make it easier to remove the card.

Cheers
Pasadena

4313B
01-24-2004, 06:45 AM
Once the cards are removed you should be able to see the values of the components on the boards along with their designations as I've previously posted. C101, C103, C105, etc.

Looking at your photos of those cards we should be able to determine exactly what you have. If you can keep the cards removed long enough to tell us the values of some of the components that would be great.

bbno4
01-24-2004, 07:16 AM
pic

4313B
01-24-2004, 07:22 AM
What are the numbers written on C208 and C211?
What are the color bands on R207 and R211?
Those components are on 12-16467.

Ooops, you overwrote the post of the LF card with the HF card. Give them completely different file names before posting them :)

What are the numbers written on C103 and C105?
What are the color bands on R103 and R105?
Those components are on 12-16466.

Once I get those values I can run a voltage drive and see what you have in about 5 minutes.

bbno4
01-24-2004, 07:31 AM
pic

bbno4
01-24-2004, 07:35 AM
16467 LF

pasadena
01-24-2004, 08:00 AM
bbno4,

Good stuff, now we're getting somewhere.

Can you please submit close-up photos of the other side (not the circuit side) of the both cards, this will show the tracks of the circuit board.

This will show it's all connected up.

Thanks for your photos and for your patience.

Cheers
Pasadena

bbno4
01-24-2004, 08:06 AM
c208...Y394
c211...u273
r207..left to right...red,blue,red,red,red
r211..left to right...red,red,red,blue,red

c103...Y683
c105...Y683
c109...102..1H
c111...102..1H
r103...left to right...red,red,red,white,white
r105...left to right...red,red,red,pink,pink

bbno4
01-24-2004, 08:20 AM
16466

bbno4
01-24-2004, 08:22 AM
16467

4313B
01-24-2004, 08:58 AM
Thank you very much for the info :yes:
You've been very patient and helpful and we appreciate it :)

Here is a repost of your low pass card photo along with the required values for it to operate correctly with the K2.S5500

4313B
01-24-2004, 09:04 AM
Your cards definitely appear to be for the XPL200A.

pasadena
01-24-2004, 09:05 AM
Originally posted by Giskard
Thank you very much for the info :yes:
You've been very patient and helpful and we appreciate it :)

Here is a repost of your low pass card photo along with the required values for it to operate correctly with the K2.S5500

Giskard,

So are the cards verified as being made for the XPL-200's?

Cheers
Pasadena

pasadena
01-24-2004, 09:06 AM
Originally posted by Giskard
Your cards definitely appear to be for the XPL200A.

Giskard,

You read my mind:)

Cheers
Pasadena

pasadena
01-24-2004, 09:07 AM
Originally posted by Giskard
Your cards definitely appear to be for the XPL200A.

Giskard,

When you say 200A, does this also covers the original 200?

Cheers
Pasadena

4313B
01-24-2004, 09:14 AM
Yes.

XPL200/XPL200A with respect to this electronic crossover.

pasadena
01-24-2004, 09:20 AM
Originally posted by Giskard
Yes.

XPL200/XPL200A with respect to this electronic crossover.

Giskard,

Now that we know what the values and the card setups are, can you verify all this against the DX-1 schematic previously posted as to whether or not the schematics for the LF/HF cards check out?

I only ask this because someone said that there were two copies of the DX-1 schematic floating around and wanted to check if the one on this board is the correct one?

Cheers
Pasadena

4313B
01-24-2004, 09:32 AM
The schematics posted all over this forum for the DX-1 are the original version designed for systems such as the XPL200/XPL200A. It appears to be the only schematic available from Harman/JBL.

The "newer" schematic would show that the high pass card was changed to a biased version for use with K2 systems. The high pass for the K2.S5500 is a simple 6 dB/octave with the series capacitors biased. (0.015uF series capacitor followed with a 4.7Mohm resistor to 15V supply, followed by the 0.011uF series capacitor and a 10.7k parallel resistor)

To use the older card with the K2.S5500 you could simply use a 0.0063uF series capacitor and a 10.7k parallel resistor. To make up for that fact that you won't be biasing, use a killer capacitor like a polystyrene and tin foil RelCap from some place such as Michael Percy Audio if it will physically fit. (See page 5 of his catalog and note the RT 0.0062uF for $3.95)

You could also modify the older card for biasing and simply run the voltage feed from the low pass card.

pasadena
01-24-2004, 09:37 AM
Originally posted by Giskard
The schematics posted all over this forum for the DX-1 are the original version designed for systems such as the XPL200/XPL200A. It appears to be the only schematic available from Harman/JBL.

Giskard,

I'm going to suss out how easy it is to make up both cards from scratch.

I'll see my cousin who works in the electronics field to see where one would start trying to build these cards.

The first part will be to deisgn and make the PCB board as blank cards are not made anymore. It will be an interesting little project to say the least.

I'm all the way over in aussie land so finding the DX-1's are like fidning a needle in the haystack.

Cheers
Pasadena

4313B
01-24-2004, 09:42 AM
Making them both from scratch would be quite easy. Don't even bother putting in runs for all the unused components.

bbno4
01-24-2004, 10:59 AM
Hi Giskard
Thank you very much, do you mean that the HF 12-16466 card is no need to do any action? And since i know nothing about electronic, so it's still a problem for me to modify the 12-16467 card:confused:

4313B
01-24-2004, 11:15 AM
The HF12-16466 card could be done two ways.

The simplest way would be to employ an RC filter using a very high quality capacitor. The capacitor value would be 0.0062 microfarads (uF) and the resistor value would be 10.7k ohms.

The more difficult (but doable) way would be to modify the card for biased capacitors. The 0.0062 uF capacitor would then be replaced with a 0.015uF and a 0.011uF in series with each other with their joining point connected to the 4.7M ohm resistor. You could take the voltage feed to the other end of the 4.7M ohm resistor from the voltage feed on the LF card.

I personally would try the simple way first using the best capacitor I could find and see how it sounded.

As for doing all this work... do you know a reputable electronics technician in your area?

If you do go through with this, don't just mod the cards, pop them in, and turn "everything" on. Have a voltage drive run on the network first. I would be inclined to test the network with an inexpensive transducer as well before hooking it into your primary system.

pasadena
01-24-2004, 06:20 PM
Originally posted by Giskard
The HF12-16466 card could be done two ways.

I personally would try the simple way first using the best capacitor I could find and see how it sounded.

Giskard,

If the cards were left for XPL-200 listening, what mods would you perform to maxmise performance using the best parts available?

What would you recommend modiyfing the rest of the DX-1, if any were to be done? With unit being a decade old technology wise, I'm sure there will be a few things you can to the DX-1 in gerneral to tweak some serious performance out of it?

Look forward to some interesting comments!!! :)

Cheers
Mark

Ian Mackenzie
01-25-2004, 06:18 AM
With great care you could use better quality filter capacitors, but the snap is they would need to fit the boards.

The main limitation is the unit is not balanced and unless you were careful, the otherwise lower dstortion would be masked by hum and noise.

As one JBL designer told me............" the bottom line is that an electronic crossover on this system probably will sound better than the internal passive, but it is a bunch of extra parts and trouble."

Experience proves this to be the case unless carefully engineered such as in a pro monitor application

My advice is invest in a better amp and upgrade the filter caps in the existing internal network.

Ian

pasadena
01-25-2004, 07:06 AM
Originally posted by Ian Mackenzie
My advice is invest in a better amp and upgrade the filter caps in the existing internal network.

Ian

Ian,

What would be required to make the unit balanced?

I have been thinking about adding XLR inputs to the DX-1 but have yet to investigate whether or not this is worth pursuing.

You could probably upgrade the power supply and a number of other mods but everything still has to work harmoniously once modded.

Cheers
Pasadena

4313B
01-25-2004, 07:27 AM
Originally posted by Ian Mackenzie
As one JBL designer told me............" the bottom line is that an electronic crossover on this system probably will sound better than the internal passive, but it is a bunch of extra parts and trouble."Yeah but building one's own amplifier is a bunch of extra parts and trouble too. In fact, this whole DIY Audio thing is a bunch of extra parts and trouble. :D

I'd be inclined to try normal and bi-amped in any case and see which one is preferred. :)


Originally posted by Ian Mackenzie
My advice is invest in a better amp and upgrade the filter caps in the existing internal network.I'd definitely support those ideas. The existing internal network could probably use a complete rework. Be forewarned - either route will require extra parts and trouble though... :p

Earl K
01-25-2004, 08:11 AM
Hi Giskard

- Fine work on helping our new friend in Hong Kong. :thmbsup:

And again, a big ThankYou to bbno4 for the very fine & informative pictures of your XPL-200 cards . :D

Pasadena; since you actually own some DX-1 units , I'd buildup the necessary cards and do as Giskard mentioned , see if you prefer the biamping option. That's likely the least hassle at this point. If this biamping option doesn't do it for you then selling the unit(s) with some working cards will be a lot easier. Rebuilding an existing network to ones taste is always a great endeavour and of course pursuing the best "the sounding amp you've ever heard" is a very worthy goal (for all of us).

Giskard; did JBL ever workup a DX-1 card for the S5800 ? I'm wondering how it might differ from the S5500 info that you posted.

regards <> Earl K :)

4313B
01-25-2004, 11:51 AM
It took three covert ops teams, two dozen smoke grenades, and twenty-four hot ham and cheese sandwiches to get the S5500 data...

I'll try to aquire the S5800 and/or S9800 data sometime in the future. :D

Earl K
01-25-2004, 12:23 PM
It took three covert ops teams, two dozen smoke grenades, and twenty-four hot ham and cheese sandwiches to get the S5500 data...
Wow,,,, sounds like I missed an excellent Simpsons episode. :D


I'll try to aquire the S5800 and/or S9800 data sometime in the future. Thanks - it's all very helpful info .

<> Earl K :)

pasadena
01-28-2004, 08:13 AM
Originally posted by Giskard
It took three covert ops teams, two dozen smoke grenades, and twenty-four hot ham and cheese sandwiches to get the S5500 data...

I'll try to aquire the S5800 and/or S9800 data sometime in the future. :D

Giskard,

I've just been speaking to someone who has a pair of DX-1's and he said that he ran them in full balanced mode as a pair and he also went on to say that the DX-1's were single ended? What would he mean by single-ended?

I thought that a unit could not be run in balanced mode unless they had balanced XLR inputs? As you may already be aware, the DX-1 have only RCA input/outputs!!!!

Care to shed some light on this?

Cheers
Pasadena

boputnam
01-28-2004, 09:35 AM
:spin:

I'd be inclined to think he ran pin1 to chassis ground, pin2 to (+) and pin3 to (-), for each. Or maybe I'm lost.

Pasadena - can you ask him what he actually did? :confused:

pasadena
01-28-2004, 09:58 AM
Originally posted by boputnam
:spin:

I'd be inclined to think he ran pin1 to chassis ground, pin2 to (+) and pin3 to (-), for each. Or maybe I'm lost.

Pasadena - can you ask him what he actually did? :confused:

Boputnam,

He quotes saying "The DX-1 is single ended meaning RCA hook-up only (one positive and one negative signal). For balanced mode operation, one DX-1 takes the negative signal thru the RCS positve and the other DX-1 the positive signal thru the positive RCA plug and then there is a common ground. Believe me it works great."

Now, shouldn't it be "negative signal thru the RCS NEGATIVE (instead of RCS positive)" I thought....I got him to check this out exactly how his set it all up so I will post more info once I get something.

So, there's no XLR cables involved in this process (I would think) and all done with RCA's.

In any case, my initial intention with my two DX-1's was two use one DX-1 per side and hook-up(for the moment) one two-channel amp per side in a non-true bi-amped state and later on, source another two amps to have a true bi-amped setup.

Cheers
Pasadena

boputnam
01-28-2004, 10:20 AM
Wow... Goofy. :nutz:

It appears, the Giskard was cyber-intuitive on this. Figures. Too bad his post is gone... :( Giskard has seen it all. :yes:

That XLR-to-RCA wiring is not truly balanced. All the User is doing is making an adaptor...

bbno4
01-29-2004, 07:57 AM
Hi
If I can't find the cards for K2-S5500, is M552 good for my spearkers?

Earl K
01-29-2004, 03:08 PM
Hi bbno4

If I were you, I'd try as hard as I could to get the proper S5500 cards for the DX-1 .

The reason; only the DX-1 cards will have the "proper" assymetrical crossover slopes. They also provide some EQing for your S5500 speakers as well as maintaining the proper "phase" between the woofers and horn . Giskard pointed out that the cards for the S5500 have a 18 db/octave slope for the low pass while having only a 6 db/octave slope for the high pass. Those slopes are there to mimic some of the passive design "wizardry" that is present in the passive crossover. These 2 cards ( hi & lowpass ) aren't working ( or turning over ) at exactly the same crossover point. As I mentioned, the DX-1 is doing more than just crossing over signal to low and hi at a single fixed point - it also is setup to maintain proper phase relationships for the special MTM design.

To duplicate the features built into the DX-1s' custom S5500 cards - you'd need to buy a crossover that has large amounts of variation for each pass-band section. The M552 that you mentioned just doesn't qualify because it can't provide these necessary functions.

- I'm still mystified how you "cooked" 4 woofers before you first actually biamped. You said you put the switch into "biamp" mode and that was all. What happened to your amplifier ?

- Here's a picture from the S5500 Operators Manual showing the proper method for a "biamp" hookup . Do you have this manual ?

regards <> Earl K

grumpy
01-29-2004, 05:22 PM
If XLR pin 1 was used as ground and went to the
RCA ground of two RCA connectors, then
pin 2(+) went to the center pin of one of the RCA
connectors and pin 3(-) went to the center pin of
the other RCA connector, then you have your
adapter to use 2 single ended processors
(crossovers in this case) to continue the
"balanced" signal. The signals running through
each crossover are out of phase with respect to
each other, including the hi/lowpass outputs.

(this is all mono... one could do a single channel 'balanced' with a dual channel processor).

One would have to form two more such adapters
for each crossover output to drive the two
(presumably) balanced input amplifiers, each
amplifier being driven from 1/2 of each crossover.

lots of adapters...balance would depend on both
circuit gain and frequency matching. Does seem
like a lot of work and $$$, but it would indeed be
balanced. Would be fun to try if one had all this
equipment laying around... :)

-grumpy

bbno4
01-29-2004, 06:27 PM
Hi Earl K

Thanks for your information. I had the manual of K2. Before I use K2, I had a pair of L250 TiQ Ltd, I use two Macintosh Amp to drive them in BI-Wire Mode. After I had the pair of K2, the staff of Hong Kong JBL agent told me that if I using two Amp, I should set it on Bi-Amp Mode (even I don't have DX-1). So all the woofers burned within a minute:bomb:
Maybe my amps with protection, so they are safed.

bbno4
02-05-2004, 03:15 AM
Hi All

Thank you so much, just received the message from Hong Kong Agent and JBL Asia Customer Services, my DX-1 can be send back to US for modification:smthsail: :D

Best Regards
bbno4

4313B
02-05-2004, 05:56 AM
Outstanding! :yes:

It didn't take too long for someone to step up to the plate did it?

Niklas Nord
02-05-2004, 02:50 PM
Is there any crosover for my s9500 ?


Is it the DSC 280 ? and the Accuphase X25 maybe

pasadena
02-11-2004, 10:09 AM
Originally posted by Giskard
Outstanding! :yes:

It didn't take too long for someone to step up to the plate did it?

Giskard,

Here's some info I received from Harman regarding the DX-1 cards that might be of interest to everyone.

I have attached an excerpt from his e-mail:

"The cards are buffered on input and output by the circuitry in the DX1. The DX1 input stage is a discrete, unity gain buffer. It drives the LP and HP card inputs. The output of the HP card goes to another discrete, unity gain buffer. The output of the LP card goes to several op-amp stages including the level control, gain and a inverting stage to give both normal and inverted LP outputs for amplifier bridging or balanced line runs. The LP stage has approximately +10 dB of gain above unity.

All you really need to work on crossovers is the schematics of the cards. Observe the minimum resistance suggestions to prevent loading down the previous stage. The LF op-amp can be any of the typical dual channel 8 pin package such as LM833, 5532, or OP275 (my particular favorite)."

pasadena
02-11-2004, 10:13 AM
DX-1 LF Schematic

pasadena
02-11-2004, 10:14 AM
DX-1 HF Schematic

bbno4
03-29-2004, 03:12 AM
:p my DX-1 is modified by US JBL team. Now the sound of my K2-S5500 is better than before. The one who are using S5500 must try to find a unit of DX-1....really it's very useful.

Niklas Nord
03-29-2004, 03:25 AM
Maybe I should try it for my K2 s9500 also then

pasadena
03-30-2004, 12:05 AM
Originally posted by Niklas Nord
Maybe I should try it for my K2 s9500 also then

Niklas,

I was told from Harman that there were only 500 of the DX-1 units ever made.

To make matters more interesting, JBL stopped making cards for the DX-1's a long time ago and DX-1's sold of late had no cards in them.

I personally have three of the DX-1's and two sets of XPL-200 cards. It is extremely hard to find cards for the DX-1's but certainly not impossible. It took me 9 months to get my 2 sets of cards.

Try contacting harman in the U.S to see if they still have any DX-1's left in stock. If they do, you can have one sent to sweden.

The benefits of what the DX-1 with the cards offers is certainly worth the wait.

Good luck in your search.

Cheers
Pasadena

pasadena
03-30-2004, 12:14 AM
Originally posted by bbno4
:p my DX-1 is modified by US JBL team. Now the sound of my K2-S5500 is better than before. The one who are using S5500 must try to find a unit of DX-1....really it's very useful.

Bbno4,

You actually received already made cards up for your speakers, not modified cards as first perceived.

When you told me that you were going to send your original XPL-200 cards in for modifications to JBL in the U.S, at the same time I found a buyer who sold me a set of S5500 and a set of S9500 cards and a DX-1.

I spoke to a technician at harman and struck up a deal where I sent them my two sets of cards and in return received two sets of XPL-200 cards.

You were sent your S5500 cards and the set of S9500 cards I don't know what happened with. I was told that there was already an owner needing a set of S9500 cards.

In the end, everyone was happy as no modifications were done all round, which turns out to be better as the technican explained. A card modificed does not perform as well as an unmodified card.

Good luck with your DX-1.

Cheers
Mark

bbno4
03-30-2004, 02:03 AM
Hi Mark

:) So we got what we need
maybe your S9500 card had been modified by JBL and sent back to you? So you got one set from my XPL-200 cards & one set from your modified S9500 cards

pasadena
03-30-2004, 04:57 AM
Originally posted by bbno4
Hi Mark

:) So we got what we need
maybe your S9500 card had been modified by JBL and sent back to you? So you got one set from my XPL-200 cards & one set from your modified S9500 cards

Bbno4,

Actually, JBL had two sets of XPL-200 cards waiting for me before I even sent mine.

I don't know what happened with the S9500 cards so maybe they still might have them. Unlikely because I remember them saying that they were all going.

Anyway, we did get what we want and I think we're damn lucky we have the cards we want.

Keep them, treasure them!!! :)

Cheers
Pasadena

bbno4
03-30-2004, 10:30 AM
I just opened the DX-1 case, and found that there is a wire link between the 2 cards. What's for that?

4313B
03-30-2004, 11:14 AM
Originally posted by bbno4
I just opened the DX-1 case, and found that there is a wire link between the 2 cards. What's for that? It's for bias. You have a modified high pass card. No biggie, it's fully functional.

bbno4
03-30-2004, 08:38 PM
Hi Giskard

Thanks for your reply:)



Hi Mark

Is that your S5500 card?