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#41
Posted to rec.audio.tech
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unbalanced to balanced input
"Todd H." wrote ...
"gunnet" writes: So in the end to sum all: I make the cable: hot to hot, shield to shield, easy...... and I don't loose 6db because power for me is important as I have to play music laud in party. So this item is useless in my case http://www.behringer.com/DI600P/index.cfm?lang=ENG No not useless, contrary to what others seem to think. But what do I know, I've only actually used DI boxes in this situation with good success, have an EE degree and have worked professionally as a circuit designer. Suggest avoiding audio circuit design. Recommending a 110:1 device in a 1:1 application is wildly inadvisable. |
#42
Posted to rec.audio.tech
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unbalanced to balanced input
"Todd H." wrote in message
"gunnet" writes: So in the end to sum all: I make the cable: hot to hot, shield to shield, easy...... and I don't loose 6db because power for me is important as I have to play music laud in party. So this item is useless in my case http://www.behringer.com/DI600P/index.cfm?lang=ENG No not useless, contrary to what others seem to think. But what do I know, I've only actually used DI boxes in this situation with good success, I've used DI boxes for this purpose and had good sucess as well. My application was connecting the unbalanced outputs of some low-cost wireless mics to a console that was about 100' away. The mics had 1/4" unbalanced jacks for their outputs and the console inputs were balanced. Of course the DI boxes were suboptimal, overkill and everything else, but I had them on hand. In the end the sound was good enough and the job got done. |
#43
Posted to rec.audio.tech
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unbalanced to balanced input
"Eeyore" wrote in
message "Todd H." wrote: "gunnet" writes: So this item is useless in my case http://www.behringer.com/DI600P/index.cfm?lang=ENG No not useless, contrary to what others seem to think. It's completely useless since it introduces a 20dB drop in signal level for one thing ! ( 50dB if you use the pad ). Right, the balanced input that these are used with is a mic input that has from 10-50 dB to 0-60 dB gain, depending on the specific mic input. |
#44
Posted to rec.audio.tech
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unbalanced to balanced input
Arny Krueger wrote: "Todd H." wrote in message No not useless, contrary to what others seem to think. But what do I know, I've only actually used DI boxes in this situation with good success, I've used DI boxes for this purpose and had good sucess as well. No you haven't. Read the thread ! My application was connecting the unbalanced outputs of some low-cost wireless mics to a console that was about 100' away. The mics had 1/4" unbalanced jacks for their outputs and the console inputs were balanced. Right. They weren't line level inputs which is exactly the point there ! A DI box with its step down is no good for driving a 1V rms type line input ! Graham |
#45
Posted to rec.audio.tech
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unbalanced to balanced input
Arny Krueger wrote: "Eeyore" wrote "Todd H." wrote "gunnet" writes: So this item is useless in my case http://www.behringer.com/DI600P/index.cfm?lang=ENG No not useless, contrary to what others seem to think. It's completely useless since it introduces a 20dB drop in signal level for one thing ! ( 50dB if you use the pad ). Right, the balanced input that these are used with is a mic input that has from 10-50 dB to 0-60 dB gain, depending on the specific mic input. Read the damn thread Arny. The OP doesn't have a MIC input ! Unless he's been hiding something. Graham |
#46
Posted to rec.audio.tech
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unbalanced to balanced input
"Eeyore" wrote in
message Arny Krueger wrote: "Eeyore" wrote "Todd H." wrote "gunnet" writes: So this item is useless in my case http://www.behringer.com/DI600P/index.cfm?lang=ENG No not useless, contrary to what others seem to think. It's completely useless since it introduces a 20dB drop in signal level for one thing ! ( 50dB if you use the pad ). Right, the balanced input that these are used with is a mic input that has from 10-50 dB to 0-60 dB gain, depending on the specific mic input. Read the damn thread Arny. Use your memory for a change, Graham. I posted an effective solution to the OP's problem several days ago in the form of a reference to Rane Note 110. Can you remember that far back, or do I need to post a google URL to make my point? ;-) The OP doesn't have a MIC input ! Unless he's been hiding something. Never heard of thread drift, I take it. ;-) |
#47
Posted to rec.audio.tech
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unbalanced to balanced input
Arny Krueger wrote: "Eeyore" wrote Arny Krueger wrote: "Eeyore" wrote "Todd H." wrote "gunnet" writes: So this item is useless in my case http://www.behringer.com/DI600P/index.cfm?lang=ENG No not useless, contrary to what others seem to think. It's completely useless since it introduces a 20dB drop in signal level for one thing ! ( 50dB if you use the pad ). Right, the balanced input that these are used with is a mic input that has from 10-50 dB to 0-60 dB gain, depending on the specific mic input. Read the damn thread Arny. Use your memory for a change, Graham. I posted an effective solution to the OP's problem several days ago in the form of a reference to Rane Note 110. Can you remember that far back, or do I need to post a google URL to make my point? ;-) I recall it well Arny. In classic Rane fashion it was an ideal solution. It appeared to confuse the OP though since he attempted it somehow with single screened cable. Follow the thread to where he explains this. The OP doesn't have a MIC input ! Unless he's been hiding something. Never heard of thread drift, I take it. ;-) Irrelevant here. DIs are not a suitable solution for the OP's task *EVER* ! I think I should call you for obfuscation ! loTs ! Graham |
#48
Posted to rec.audio.tech
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unbalanced to balanced input
"Eeyore" wrote in
message Arny Krueger wrote: "Eeyore" wrote Arny Krueger wrote: "Eeyore" wrote "Todd H." wrote "gunnet" writes: So this item is useless in my case http://www.behringer.com/DI600P/index.cfm?lang=ENG No not useless, contrary to what others seem to think. It's completely useless since it introduces a 20dB drop in signal level for one thing ! ( 50dB if you use the pad ). Right, the balanced input that these are used with is a mic input that has from 10-50 dB to 0-60 dB gain, depending on the specific mic input. Read the damn thread Arny. Use your memory for a change, Graham. I posted an effective solution to the OP's problem several days ago in the form of a reference to Rane Note 110. Can you remember that far back, or do I need to post a google URL to make my point? ;-) I recall it well Arny. No you don't. In classic Rane fashion it was an ideal solution. Nope, Rane note is a table of about 24 solutions. It appeared to confuse the OP though since he attempted it somehow with single screened cable. You need to read the thread yourself, Graham. What he said is: "Before I made a cable as illustrated at number 17, but I get some noise coming from the speaker.: Referencing http://www.rane.com/note110.html Solution number 17 clearly shows 2-conductor shielded cable. Either he didn't do what he said and was speaking falsely, or he did what he said, and had a different problem. I'll give him the benefit of the doubt, and presume that he did what he said, but had an additional more subtle problem with his balanced input. I speculate that his balanced input was a typical transformerless balanced input. The additional more subtle problem that I've encountered in situations like this was due to common mode dynamic range limitations of many transformerless balanced inputs. The relevant problem with Rane Note 110 solution 17 is that there is no explicit connection between the chassis of the two pieces of equipment. This makes chassis ground potential differences more likely, and that makes it more likely that the common mode dynamic range of the balanced input is being exceeded. When I make cables like the one shown in solution 17, I have been known to attach an alligator clip to the shield at the left end. If there is stil hum after plugging in the RCA connector, I experimentally attach the alligator clip to the source piece of equipment. There may be a small or large spark. There's a good chance that the hum goes away, either way. ;-) If the spark is non-existent or small, I have a working solution. If the spark when I attach the ground clip is very large, I may have to reset a breaker or replace a fuse. ;-( But, I then have a good order-of-magnitude estimate of the problem. ;-) Often moving the line plug of the source piece of equipment or reversing it can help. |
#49
Posted to rec.audio.tech
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unbalanced to balanced input
I really tried the rane solution at number 17 of the document....
look at this pic I took http://img226.imageshack.us/img226/7439/xlrck7.jpg http://img174.imageshack.us/img174/1839/im000033yj6.jpg As you can see the shield is now cutted because yesterday I tried to see what happens with just the hot and the cold connected: it's the same as before. On another cable I tried also to cut the cold, result: weird hum and noise from the speaker. I want to specify that I don't have a mic, or instruments. I just want to connect the cd to the amplifier to play music in stereo. And the cd could be near, or also on the top of the amplifier. P.S. The solder point are good of the cable are good? |
#50
Posted to rec.audio.tech
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unbalanced to balanced input
"gunnet" wrote ...
I really tried the rane solution at number 17 of the document.... look at this pic I took http://img226.imageshack.us/img226/7439/xlrck7.jpg http://img174.imageshack.us/img174/1839/im000033yj6.jpg As you can see the shield is now cutted because yesterday I tried to see what happens with just the hot and the cold connected: it's the same as before. On another cable I tried also to cut the cold, result: weird hum and noise from the speaker. Assuming that at the other end of your cable is an adapter that breaks out the stereo 3.5mm into two mono 3.5mm. Which would imply that you have TWO of these cables, one for the right channel, and one for the left. Is that correct? I want to specify that I don't have a mic, or instruments. I just want to connect the cd to the amplifier to play music in stereo. And the cd could be near, or also on the top of the amplifier. You have steadfastly refused to identify what "amplifier" you are trying to connect to. This is not only a great mystery to us who are trying to help you, but contributes to your ongoing problems. Since you won't identify the equipment, go out and buy a cheap stereo isolation transformer box and the appropriate cables and cut your losses. Like this... http://www.musiciansfriend.com/produ...tor?sku=150450 Yes, you can do this with just a specially-wired cable, but not without knowing exactly what you are interfacing with. There are different kinds of "balanced inputs" |
#51
Posted to rec.audio.tech
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unbalanced to balanced input
Assuming that at the other end of your cable is an adapter that breaks out the stereo 3.5mm into two mono 3.5mm. Which would imply that you have TWO of these cables, one for the right channel, and one for the left. Is that correct? yesI have two of them. At the other and there is an rca connector for the cd player. You have steadfastly refused to identify what "amplifier" you are trying to connect to. This is not only a great mystery to us who are trying to help you, but contributes to your ongoing problems. Oh I forgot, I'm not man of mistery but noone has asked me directly what amplifier it was... I have a Db technologies MT530: http://flankenlauf.cfmx.de/db-techno...ugid=0&pid=39I found also this on the amplifier, it has some foto if it helps:http://www.audioproject.it/MT530.htmCD player: Onkyo DX-7222: http://www.eu.onkyo.com/dl/4619/Manu...22_English.pdf |
#52
Posted to rec.audio.tech
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unbalanced to balanced input
"gunnet" wrote...
Oh I forgot, I'm not man of mistery but noone has asked me directly what amplifier it was... I asked you last Wednesday. I have a Db technologies MT530: http://flankenlauf.cfmx.de/db-techno...ugid=0&pid=39I found also this on the amplifier, it has some foto if it helps:http://www.audioproject.it/MT530.htmCD player: Onkyo DX-7222: http://www.eu.onkyo.com/dl/4619/Manu...22_English.pdf Get a couple of simple RCA to 1/4 inch (mono) cables and plug it into the 1/4 inch (6.3mm) jack. Or a couple of RCA to 1/4 inch adapters and just a simple RCA to RCA stereo cable. Why fool around with the XLRs for unbalanced signals? |
#53
Posted to rec.audio.tech
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unbalanced to balanced input
"Richard Crowley" writes:
"gunnet" wrote... Oh I forgot, I'm not man of mistery but noone has asked me directly what amplifier it was... I asked you last Wednesday. I have a Db technologies MT530: http://flankenlauf.cfmx.de/db-techno...ugid=0&pid=39I found also this on the amplifier, it has some foto if it helps:http://www.audioproject.it/MT530.htmCD player: Onkyo DX-7222: http://www.eu.onkyo.com/dl/4619/Manu...22_English.pdf Get a couple of simple RCA to 1/4 inch (mono) cables and plug it into the 1/4 inch (6.3mm) jack. Or a couple of RCA to 1/4 inch adapters and just a simple RCA to RCA stereo cable. Why fool around with the XLRs for unbalanced signals? Doh! -- % Randy Yates % "She's sweet on Wagner-I think she'd die for Beethoven. %% Fuquay-Varina, NC % She love the way Puccini lays down a tune, and %%% 919-577-9882 % Verdi's always creepin' from her room." %%%% % "Rockaria", *A New World Record*, ELO http://home.earthlink.net/~yatescr |
#54
Posted to rec.audio.tech
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unbalanced to balanced input
"Richard Crowley" wrote in message ... Get a couple of simple RCA to 1/4 inch (mono) cables and plug it into the 1/4 inch (6.3mm) jack. Or a couple of RCA to 1/4 inch adapters and just a simple RCA to RCA stereo cable. Why fool around with the XLRs for unbalanced signals? Isn't that exactly what I said days ago? MrT. |
#55
Posted to rec.audio.tech
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unbalanced to balanced input
"Mr.T" MrT@home wrote in message ... "Richard Crowley" wrote in message ... Get a couple of simple RCA to 1/4 inch (mono) cables and plug it into the 1/4 inch (6.3mm) jack. Or a couple of RCA to 1/4 inch adapters and just a simple RCA to RCA stereo cable. Why fool around with the XLRs for unbalanced signals? Isn't that exactly what I said days ago? The OP only just revealed that he had an amplifier with 1/4-inch TRS input connectors. Unless I missed something previously? |
#56
Posted to rec.audio.tech
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unbalanced to balanced input
"Richard Crowley" wrote in message ... Get a couple of simple RCA to 1/4 inch (mono) cables and plug it into the 1/4 inch (6.3mm) jack. Or a couple of RCA to 1/4 inch adapters and just a simple RCA to RCA stereo cable. Why fool around with the XLRs for unbalanced signals? Isn't that exactly what I said days ago? The OP only just revealed that he had an amplifier with 1/4-inch TRS input connectors. Unless I missed something previously? You sure did then! MrT. ------------------------------------------------------ "gunnet" wrote in message ... thank you very much guys. I'm using cd player -----amplifier Now I've got also the manual wich has some illustration: Here's what it says: XLR unbalanced: Hot to pin2 Shield to pin1 and to pin3. JACK 6,3mm unbalanced: hot with hot, shield with shield. So what you are saying is the amp already has an unbalanced input, where all you would need is a readily available RCA-Phone jack lead, and for some reason you are trying to complicate the issue as much as possible? ---------------------------------------------------------------- |
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