| gain |
i suspect its around line level ~1VRMS just wondering if anyone here has ever measured it?
thank you. |
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| Cal Weldon |
| Moved to digital source. |
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| ionomolo |
I did measure it while playing program material and i thought it peaked arround 0.2Vrms.
So probably it's a bit higher, maybe 0.5/0.7 Vrms? |
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| gain |
much thanks for the info and sry for posting in wrong forum ... was thinking ipod waS made with SS componets at least.
peace |
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| zigzagflux |
| Airport Express is 1.5V rms at 0dB, and I believe the analog output is identical to the iPod. |
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| jcx |
My Nano appears to regulate the internal 3.6 V Li Ion battery to 3.0 V
so it can put out a little over 1 Vrms sine
1st Gen Shuffle's are interesting lab toys since they are DC coupeld - fractional Hz waveforms, multi second ramps are possible
as for forums - this is the Digital Source Forum - hard to be more relevant to USB/flash DAC |
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| sek |
| quote: | Originally posted by zigzagflux
Airport Express is 1.5V rms at 0dB, and I believe the analog output is identical to the iPod. |
Airport Express uses TI's PCM2702 or similar, the iPods differ from model to model.
Airport Express then has just a regular output filter directly connected to the (USB-) DACs output. iPods differ, yet again.
On top of that, the analogue part in Airport Express is powered with 5V (with the digital part supplied with 3.3V), iPods manage their battery power to something much lower, as jcx mentioned.
@Gain: Which iPod do you want to connect? I could try measuring one for you. Please indicate a load, i.e. input impedance of the circuit you want to drive.
PS: The current Shuffles are interesting, too. Multi-Megaherz rubbish on the output, the complete opposite of what you would expect! :D |
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| Dxvideo |
As my measuring;
My iPod Photo (60G) gives 1Vpp at 0dB 1Khz fixed wav signal. From headphone output. But line out must be better (not measured yet) because when I applied the line output to my amplifier it louds too much (may be 3dB more) |
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| gain |
| quote: | Originally posted by sek
@Gain: Which iPod do you want to connect? I could try measuring one for you. Please indicate a load, i.e. input impedance of the circuit you want to drive.
|
standard RCA line level jack. basically i want to know what the RMS (or peak) value of voltage the device puts out when plugged into a "stereo" input. in this way, i will be able to tell if im feeding my stereo with too much or too little line drive.
input impedance 20K-100K? Whatever RCA inputs are.
thanks for the many great replies. |
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| gain |
| quote: | Originally posted by jcx
as for forums - this is the Digital Source Forum - hard to be more relevant to USB/flash DAC |
got me there. my views are old fashioned, if it doesn't have tubes, its solid state. lol. |
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| sek |
| You forgot to answer my first question. :D |
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| gain |
sry sek,
its the 30GB video ipod with the touch/thumbwheel on the front. i am wanting to know the RMS voltage on the headphone outputs (1/8 stereo plug) when the ipod is cranked up at full volume with a good strong signal.
thanks. |
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| gain |
i suspect is somewhere in the ballbark of line level (~ +/- 1VRMS) since i have the ipod hooked to a line level input on a receiver im listening to now, ipod cranked to about 4/5, stereo on about 4, and it sounds (subjectively, to me) to be about the same input level as cd or tv or tape player would put in.
. |
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| sek |
All recent iPods have been video capable and all but the earliest models have a touch wheel on the front. :)
Each iPod has it's model number engraved on the lower right of it's back side.
Choose between iPod Classic (introduced September 2007), iPod with Video (late 2006 model) (discontinued September 2007) and iPod with Video (2005 model) (discontinued September 2006).
In case you can't find out, I'll just measure an iPod Classic this evening. ;) |
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| gain |
| see attached. thanks again for your help. |
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| gain |
| cant read the model #. its been worn off many times over. |
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| gain |
ok just hooked up a stereo dual ganged pot to my tape input on the line level side. (i have lots of different sources that seem to all have there unique version of what 'line level' means) so this comes in handy. i can just set the pot for the correct amount of input drive for whatever i had connected.
now onto the ipod. i had just finishing calibrating the pot so that a cd player sounded about right for line level. didn't sound weak at all yet could crank to ten with no distortion. so i hook up the ipod without moving the pot. had to crank it up (the ipod) all the way just to get about 1/2 the sound the signal level from the cd player gave.
so i guess that ipod puts out somewhere 1/2 line level (ie: ~500mv RMS)
still hoping someone out there has a scope that can confirm. |
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| sek |
Well, I've measured the iPod Classic's headphone out and the iPod Dock's line out on a scope.
The picture shows the iPod Classic in an Apple iPod Dock, both in front of the scope used. |
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| sek |
Turns out the level via iPod Classic's headphone out into a high impedance load is Up ≈ 0.47 Vp (peak) with my European model (probably output level limited due to EU regulations).
This means Urms ≈ 0.332 Vrms and thus Lu ≈ -7.3 dBu. |
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| sek |
The level via Apple's iPod Dock's line out into a high impedance load is Up ≈ 1.14 Vp (peak) with the Dock powered by the iPod (similar, but not identical to a direct out condition).
This means Urms ≈ 0.8 Vrms and thus Lu ≈ -0.3 dBu. |
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| sek |
The above pictures have been image processed for quick readability even as a thumbnail. The test signal we see is a 1kHz sinus at 0dBFS. I've tried different (digital) dBFS levels and it appears the maximum level on the headphone out really is software limited.
Please correct me on any mishap with the calculations.
In order to do a quick test, generate a 50/60Hz or 100/120Hz sine wave signal, embedd it into iTunes as a WAV file and synchronize it to your iPod. Then connect a regular multimeter (frequency dial) with the help of an open mini plug or a special test cable. The reading should show an accurate figure of your iPod's maximum RMS output level (for sinusoidal signals) which you can then use to calculate dBu figures. You may of course also employ a true RMS meter. ;)
Cheers,
Sebastian. |
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| gain |
i don't know what all this Urms, VP, LP, etc means.
an ipod has a audio amp in it. all audio amps have peak voltages they are capable of delivering to the load. it is usually measured in +/- Volts RMS.
would think it would be clearly specked out? maybe not.
can anyone here answer what the max RMS voltage output of an ipod is or do i have to drive 45min to a lab with a scope and measure myself. from the experimenting/playing i've done so far i can be certain the ipod's output is much less than line level (maybe like 250mV - 500mV).
thanks. |
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| gain |
just reminded me of a quote from an old teacher,
"the nice thing about standards is there is such a variety of them to choose from." |
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| AndrewT |
| quote: | Originally posted by sek
In order to do a quick test, generate a 50/60Hz or 100/120Hz sine wave signal, embedd it into iTunes as a WAV file and synchronize it to your iPod. Then connect a regular multimeter (frequency dial) with the help of an open mini plug or a special test cable. The reading should show an accurate figure of your iPod's maximum RMS output level (for sinusoidal signals) which you can then use to calculate dBu figures. |
Hi Gain,
Sek tells you how to do it without a scope.
50Hz to 120Hz can be measured with an analogue or digital multimeter. |
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| gain |
i dont know what anything sek is saying. i don't even own a scope, let alone sophisticated computer measuring equip like he suggests using.
basically i want to make a attenuator/booster so i can convert the ipod voltage output level to line level RCA so i can connect it to a stereo. like cd, tv, vcrs, etc all put out about ~1VRMS. ipods put out something different than ~1VRMS. what does an ipod put out? from experiment in my basement i have found it to be about 1/2 - 2/3 the voltage signal output of a cd player.
does this clarify my question? its not that i dont want to take your advise, just dont have thousands of dollars to spend on computer equipment right now. can someone please just tell me "the analog output of an ipod through its 1/8 stereo female is XYZmV)
thanks. |
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| AndrewT |
Hi gain,
you're sitting at a computer, I'll bet it is already capable of creating that 0dBfs file that Sek talks about.
I suspect you have a DMM.
You only need to do some reading and ask the right questions if the literature is beyond comprehension.
He is not asking you to spend any money. Simply to use your brain.
Go Read. |
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| gain |
| i'll go measure, experiment and speak with other experts. i'll also give up hope of getting a straight answer on this thread. |
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| sek |
| quote: | Originally posted by AndrewT
Sek tells you how to do it without a scope.
He is not asking you to spend any money. Simply to use your brain. |
Thanks for the heads up, Andrew. ;)
| quote: | Originally posted by gain
i don't know what all this Urms, VP, LP, etc means. |
The symbol U is derived from lat. urgere (to urge, push, press) and is the old fashioned way of designating a Voltage. The international SI unit is V, which some researchers critizise (due to it's ambiguity). That still leaves us with L, which stands for the level.
So all you are looking for is in the above posts. You know what the character '≈' means, right? ;)
| quote: | | would think it would be clearly specked out? maybe not. |
Not with Apple. ;)
iPods are consumer products. They rather not specify it at all than risk a comparison with the competition. :D
| quote: | | i don't even own a scope, let alone sophisticated computer measuring equip like he suggests using. |
Erm, hello?
I'm trying to explicitly telling you how to do it with a regular computer and without a scope here! :cannotbe:
By signal generator I of course mean free software for you to download. Google is your friend. ;)
| quote: | | ipods put out something different than ~1VRMS. what does an ipod put out? |
Let me repeat for you: ≈ 0.33Vrms :bawling: But please keep in mind that this may not apply to all iPods.
Take a look at this Voltage and Level Converter in order to compare this to the other numbers I gave you.
No, wait. I'll do it for you!
1Vrms = 0dB(V).
0.33 Vrms ≈ -9.5dB(V).
So in order to elevate the iPod's output level to your desired input level you need a gain stage with a gain of a ≈ +3 or (in other words) a ≈ +9.5dB (without V :D).
Why? Because 1Vrms ≈ 3 * 0.33Vrms. And also because 0dBV - (-9.5dBV) = +9.5dB (without V). ;)
I leave it on you to repeat the calculation for the line level I measured. |
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| gain |
| quote: | Originally posted by sek
Let me repeat for you: H0.8Vrms :bawling:
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thank you, sek. all i wanted to know. |
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| sek |
Aaaah! I corrected a wrong number while you've been reading! :bawling:
It's 0.33Vrms, look again. ;)
I had iPod and Dock output levels confused... Sorry! |
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| gain |
anyone have a fav circuit for amplifying the 0.8V to 1.0-1.2V ?
i have two working now but don't doubt someone out there has come up with something better.
thanks. |
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| sek |
A gain of ≈10dB (or factor of three) is easy to accomplish with any active preamp or gain stage circuit. You could try the forum search. Or use the Dock! ;)
Remember it's 0.33Vrms, not 0.8Vrms! |
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| AndrewT |
0.8Vac to 1.2Vac is a gain of just +3.5dB. You'll hardly notice that.
0.8Vac to 1.6Vac is +6dB.
0.8Vac to 2.2Vac is ~+9dB. That brings 800mVac upto around CD player output level. |
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| gain |
| cd is 2.2V? peak or RMS? once i measured it by connecting the ac side of a bridge rectifier across the out of my cd player. measured across the dc pins of the rectifier. saw ~1.22VDC. that was a 1kHz tone cd i was playing. |
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| sek |
Man, you better start finding out what you actually want! :whazzat:
A suggestion: a preamplifier with a gain range between 0 and 20dB. |
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| gain |
| quote: | Originally posted by sek
Man, you better start finding out what you actually want! :whazzat:
|
a simple circuit that takes an ipod 1/8 stereo output in on one side and outputs a signal that one gets from the output of a cd player/tape teck/etc, that can be pluggd into the line level RCA in of a standard stereo receiver.
nice extras:
- very low noise.
- operates between 12VDC-0V supply.
- adjustable gain.
simple enough? certainly someone before me has done this. |
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| sek |
| quote: | Originally posted by gain
certainly someone before me has done this. |
You can find this out by using the search function or checking some stores. |
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| gain |
| quote: | Originally posted by sek
You can find this out by using the search function or checking some stores. |
the search would be helpful if i had many many hours to wade through 1000's of pages of writings. but alas i don't. as for stores, this is a DIY site dude! a store is a last resort imo. |
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| gain |
| just inviting anyone who wants to to post their favorite circuits for doing this. |
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| sek |
| quote: | Originally posted by DocLorren
Or, eh ...use the dock? It's output is plenty for a stereo receiver line-in. |
Be careful with mentioning this. :D |
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| DocLorren |
| I know Sek, I just read the whole thread but you were SOOO confusing. |
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| sek |
| quote: | Originally posted by DocLorren
you were SOOO confusing. |
Hmm, I took great care to deliver explanations to every term I used, proove my measurements with pictures, support my results with mathematical background, give links to read up - and answer questions as they came...
I think the main problem is that the thread starter confused peak voltage, average voltage, and level. And then didn't manage to read thoroughly... :headbash:
As of my perception, someone with the plan to actually build a variable gain stage circuit should be aware of certain important basics. If some terms are new to the reader - or some explanations sound too long to follow easily - I would consider it a good opportunity (and a good point in time) to gain the knowledge that will definitely required down the course of this project anyway. :irked: |
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| DocLorren |
Fully agree with you.
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| gain |
| quote: | Originally posted by sek
I think the main problem is that the thread starter confused peak voltage, average voltage, and level. And then didn't manage to read thoroughly... :headbash:
|
actually, im quite very familiar with those concepts. what i asked, if you'd read my posts, was what was the RMS output of the 1/8 stereo out of an ipod. i said if you only knew the peak i could convert to RMS.
oh yeah, and i already built two circuits that boost the ipod to stereo line level. so, sek, i HAVE actually built a variable gain stage circuit before even starting this thread. so, don't assume because someone asks what you perceive as a dumb question that the person asking it is dumb also.
as i said earlier, i was hoping people would share their designs for ipod/stereo interfacing. thank you. |
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| sek |
| quote: | Originally posted by gain
don't assume because someone asks what you perceive as a dumb question that the person asking it is dumb also |
I honestly didn't do so, fellow DIYer. It just ceases to amaze me how many repetitions needed to occur in this thread (question clearance, device determination, number games, etc.). I claimed this to be rooted in your constantly changing your mind and your not reading thoroughly. Dumbness is (and was) not my assumption! That's all. ;)
| quote: | | actually, im quite very familiar with those concepts. |
As I said, I doubt this. First you confused voltages (Vrms, Vpeak) with each other and with the term level. Then you couldn't handle the unit conversion (and the unit decibels), which you actually should be familiar with from your former builds. All I want to do is to be of help, really. :)
| quote: | | i HAVE actually built a variable gain stage circuit before |
Yes, but for whatever reasons, you need help on a new one. ;)
Now that we mention it, what's the deal with your other gain stages? Why aren't they suitable to your needs?
Of what we heard so far, what you need is a single supply line stage with trimmable gain (i.e. a trimmer as gain resistor). Add a potentiometer in front of it and you're all set. This tutorial gives all the details, it even contains a calculation example of a stage with gain of +10, which is exactly what you need. As an opamp I recommend Texas Instrument's OPAx353 or any other single supply opamp.
Here's some literature: Designing Gain and Offset in Thirty Seconds and the Op Amps for Everyone Design Guide (Rev. B), both by Texas Instruments. The latter will show in every detail how to use even ultra precison opamps in a single supply application.
Maybe you can't find any project (and don't get any feedback on your question) because your problem is too specific. Instead, take a look into any headphone preamplifier project intended for battery use. They show how to generate an opamp supply out of 12V (or the like) and connect quality opamps. Google knows how to find DIY headphone projects, first hit is the good old CMOY (of which figure 2 is your desired circuit and figure A2 the solution to your problem). |
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| gain |
| quote: | Originally posted by sek
As I said, I doubt this. First you confused voltages (Vrms, Vpeak) with each other and with the term level. Then you couldn't handle the unit conversion (and the unit decibels), which you actually should be familiar with from your former builds. All I want to do is to be of help, really. :)
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i never even attempted these conversions.
| quote: | Originally posted by sek
Yes, but for whatever reasons, you need help on a new one. ;)
|
i asked for people to share circuits that they had had success with in the past. this is hardly a cry for help, imo.
| quote: | Originally posted by sek
Now that we mention it, what's the deal with your other gain stages? Why aren't they suitable to your needs?
|
never said they wern't. my op was a question about RMS output from ipods.
| quote: | Originally posted by sek
Of what we heard so far, what you need is a single supply line stage with trimmable gain (i.e. a trimmer as gain resistor). Add a potentiometer in front of it and you're all set. This tutorial gives all the details, it even contains a calculation example of a stage with gain of +10, which is exactly what you need. As an opamp I recommend Texas Instrument's OPAx353 or any other single supply opamp.
Here's some literature: Designing Gain and Offset in Thirty Seconds and the Op Amps for Everyone Design Guide (Rev. B), both by Texas Instruments. The latter will show in every detail how to use even ultra precison opamps in a single supply application.
Maybe you can't find any project (and don't get any feedback on your question) because your problem is too specific. Instead, take a look into any headphone preamplifier project intended for battery use. They show how to generate an opamp supply out of 12V (or the like) and connect quality opamps. Google knows how to find DIY headphone projects, first hit is the good old CMOY (of which figure 2 is your desired circuit and figure A2 the solution to your problem).
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that is great info. thank you. |
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| AndrewT |
I don't know who's kidding who here.
I'll just make sure I don't read this thread again. |
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| gain |
im kidding with you, Andrew!
don't you know i started this thread secretly knowing it would amuse you?
jk ... respect to you Andrew. this thread feels like when you ask one of those simple questions and the someone who answers must feel the need to complicate the issue so profusely in order to make themselves and what they do sound more important than they really are. its a self esteem issue mostly, sometimes comical to watch. |
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| gain |
oh yeah, something else i thought i'd share because no one mentioned it to me.
you don't need a gain stage to plug an ipod into a stereo line in. just a cord with a 1/8 stereo male on one end and two RCA males on the other. connect them together, crank the ipod to the max, and the input level is very close (a little less) than what the stereo is expecting but not by much. you will still hear the ipod just fine. the gain stage just gives the signal a little more 'oomph', but again, not necessary to enjoy your ipod through your stereo.
peace. |
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| sek |
To whom it may concern,
making a fool of me is totally uncalled for, 'dude'!
And now turning the story backwards and claiming you knew everything and actually asked for nothing is just ridiculous, honestly! :whazzat:
As Andrew subliminally mentions, someone special really needs to reread this thread, but it certainly won't be me!
| quote: | oh yeah, something else i thought i'd share because no one mentioned it to me.
|
You're just odd, 'dude'! |
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| gain |
| quote: | Originally posted by sek
You're just odd, 'dude'! |
Thanks! |
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| sek |
See? :D
Easy. :wave2: |
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| renaudagnes |
| Well, I do not understand everything (of course, I am French !) but my question is how to connect my cellular phone to my audiophile systemn because I want hear MP3 files and the memory cards on my phone are my main stockage unit ? :D |
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| gain |
| some cell phones when you plug them into usb will 'become' another hard drive. find the right folder the mp3's are in, then drop your files in there. bingo, instant cellular-mp3 player! making sure the mp3 tags are correct will greatly aid your device search for individual titles / artists. |
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| gain |
| quote: | Originally posted by sek
To whom it may concern,
making a fool of me is totally uncalled for, 'dude'!
|
making a fool out of you was not my intentions. pointing out the erroneous statements you made was. i feel bad if i offended you. besides, YOU are the only person who can give someone permission to make a fool of yourself
| quote: | Originally posted by sek
And now turning the story backwards and claiming you knew everything and actually asked for nothing is just ridiculous, honestly! :whazzat:
|
go back and reread my original post. it was a question asked, not a claim of omnipotence.
| quote: | Originally posted by sek
As Andrew subliminally mentions, someone special really needs to reread this thread, but it certainly won't be me!
|
why not? if you have some sort of problem with me be a man (or woman or whatever you are) and take it up with me yourself. if sure you can figure out how to PM if you are as knowledgeable as you claim. |
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| gain |
now, i will try again. would anyone like to share stories or diagrams for interfacing ipods to home receivers?
i made two, one based on an opamp and the other built on a single transistor amp. opamp one sounds nice, single tranny one sounds, well, not audiophile quality.
thank you. |
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| sek |
Instead of going to Kindergarden again, I'll just make a couple of quotations, highlighting some areas in order to support my point.
Here the problem begins with some general misconception about the relation between an electrical change and the corresponding audible change in level:| quote: | Post #13
i have the ipod hooked to a line level input on a receiver im listening to now, ipod cranked to about 4/5, stereo on about 4, and it sounds (subjectively, to me) to be about the same input level as cd |
The main misconceptions here are that turning the knob in hifi gear will lead to some standardized or proportional behaviour and that - on top of that - this could possibly be related to perceivable absolute values (see "Psychoacoustics: Facts and Models").
The trouble is that it leads to some guesswork which, while looking educated, is in fact way off:| quote: | Post #17
so i guess that ipod puts out somewhere 1/2 line level (ie: ~500mv RMS) |
The error between guessed and measured value is the same magnitude as the error between guessed and anticipated value (for a link to a unit calculator between voltages and levels see my post #28 above).
Here's some proof of my claim about general lack of understanding:| quote: | Post #22
i don't know what all this Urms, VP, LP, etc means.[QUOTE]
[...]
all audio amps have peak voltages they are capable of delivering to the load. it is usually measured in +/- Volts RMS.
[...]
can anyone here answer what the max RMS voltage output of an ipod is or do i have to drive 45min to a lab with a scope and measure myself. |
Neither were the units I used quoted in context. Nor is the difference between the terms RMS and level ever getting appreciated (my post #28 also contains links to wikipedia regarding the terms used).
Here's the not reading thoroughly. Note that I explicitly prevent blaming anyone for lack of knowledge. It's okay to ask questions, it's just not okay to reject answers for being too complicated...| quote: | Post #25
i dont know what anything sek is saying. i don't even own a scope, let alone sophisticated computer measuring equip like he suggests using. |
It's okay to not understand something, remember it could also have been me who didn't make it clear. But blaming others and making false claims is just odd. Let's just note that I didn't suggest anything like the above...
And how about some arrogance starting to chime in? Here you are:| quote: | Post #27
i'll go measure, experiment and speak with other experts. i'll also give up hope of getting a straight answer on this thread. |
Remember this was just after I offered my help and had promised to measure.
It could have been over at this point. But sadly... well, in case this was funny so far, wait until the first signs of self-contradiction appear:| quote: | Post #45
actually, im quite very familiar with those concepts. what i asked, if you'd read my posts, was what was the RMS output of the 1/8 stereo out of an ipod. i said if you only knew the peak i could convert to RMS. |
Familiarity with a concept is more than having heard the words before. Also, a reference to the first post is being made, completely ignoring other questions asked thereafter. And for the record, the claim "i said if you only knew the peak i could convert to RMS" is just plainly untrue.
And now - drum roll - the moment where the thread starter bursts the limit:| quote: | Post #50
oh yeah, something else i thought i'd share because no one mentioned it to me.
you don't need a gain stage to plug an ipod into a stereo line in. just a cord with a 1/8 stereo male on one end and two RCA males on the other. |
If this doesn't pose the thread ad absurdum, then what does? Besides that this is simply what you try first before you consider building a dedicated circuit for it, if the possibility was unclear before then why not simply ask? If the abilities of the purchased gear were unclear, why not just read the manufacturer's recommendations? It's all in the support documents, i.e. the features guide on pp. 26, 37, 53, 65. Could have saved everyone a lot of trouble...
In the light of all of this, I don't think i really have to follow up on expressions like these any longer:| quote: | Post #56
YOU are the only person who can give someone permission to make a fool of yourself
[...]
go back and reread my original post.
[...]
take it up with me yourself. if sure you can figure out how to PM |
This forum doesn't support PMs. Go figure. Now how much more than chickening out is this void offer?
All in all, this thread certainly won't serve as a source of other's project recommendations any more. It just can't, whom would one expect to give away his/her knowledge in the light of such a struggle.
@gain: I recommend you to open up another thread regarding project questions. Don't expect anyone to take part in a discussion with you, after you've proven so badly what someone willing to help you would have to expect from you.
Now, what makes me feel you'll be tempted to blame someone else for this thread going downhill (again)? |
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| gain |
sek, you're cool. we misunderstood each other. peace?
ps: you can PM on the forum. the person you PM gets an email. not trying to make a fool of you my friend. just want to help a fellow diy'er. |
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| sek |
| quote: | Originally posted by gain
you're cool. we misunderstood each other. peace? |
I don't believe you just give in, I believe you consider yourself the smarter one. Right?
Kidding! :D
Peace! :cool:
| quote: | Originally posted by gain
you can PM on the forum. the person you PM gets an email. |
You could. But this requires the receiving user to activate this option in the user's profile. And you didn't. ;)
PS: Honestly, you should open up another thread. If only for posting a better suited thread title for the browse and search pages. And I promise to not throw any more unwanted measurements on you. :cool: |
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| gain |
| oh yeah, and if anyone is interested, i have the measured max RMS voltage values of a 1kHz mp3 played through 3 different ipods, as well as one of those serious radio units. |
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| gain |
| thx for the update on my PM being turned off. didn't know it was. will rectify situation ASAP. |
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| sek |
| quote: | Originally posted by gain
if anyone is interested, i have the measured max RMS voltage values |
Would be interesting to know the difference between American and European models.
Could you post which value you measured for what iPod model? |
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