Thread
Classic I / Classic II, No Internal Sound Mystery
ok so i have herd reports of people with sound from the head phone jack.
but no sound from the internal speaker. With the Classic 1 and 2.
As we know, With the Classic I/II, the speaker is attached to the A/B.
The plot thickens… Some of the time, People have re-capped the A/B, even though the A/B needed caps… it did not fix the issue.
Still no sound from the internal speaker.
I have yet to experience this personally.
But i know of others that have this issue right now.
So anyway, ended up getting a Classic II last weekend.
Recapped the main board… Recapped the A/B oh yea and it really needed it too!
Finally this dreaded issue had happen to me.
Lookin around, following traces…. What gives all the new caps check out good…
So just for giggles got out the multimeter set the dial to ohms.
ok checked the speaker… Zip nothing, dead open.
So i checked a known working speaker from a parts LCII… It says right on the LC speaker
REGAL
16Ω 0.25 W
TAWAN
and sure enough the meter says 14.6Ω
Close enough for me…
The bad speaker says on it:
AAP
600-0456
Quadtronics
0.2W 63Ω
PROC
Not sure why such the Ohm difference.
Anyways so the bad speaker is riveted to the A/B with some aluminum rivets.
I was able to use my side cutters and squish the rivet, and the speaker came right out.
attached the new one with about 5 dabs little dabs of goop.
So if your classic 1 / 2 has no sound from the internal speaker, check it with your meter.
It may be bad.
but no sound from the internal speaker. With the Classic 1 and 2.
As we know, With the Classic I/II, the speaker is attached to the A/B.
The plot thickens… Some of the time, People have re-capped the A/B, even though the A/B needed caps… it did not fix the issue.
Still no sound from the internal speaker.
I have yet to experience this personally.
But i know of others that have this issue right now.
So anyway, ended up getting a Classic II last weekend.
Recapped the main board… Recapped the A/B oh yea and it really needed it too!
Finally this dreaded issue had happen to me.
Lookin around, following traces…. What gives all the new caps check out good…
So just for giggles got out the multimeter set the dial to ohms.
ok checked the speaker… Zip nothing, dead open.
So i checked a known working speaker from a parts LCII… It says right on the LC speaker
REGAL
16Ω 0.25 W
TAWAN
and sure enough the meter says 14.6Ω
Close enough for me…
The bad speaker says on it:
AAP
600-0456
Quadtronics
0.2W 63Ω
PROC
Not sure why such the Ohm difference.
Anyways so the bad speaker is riveted to the A/B with some aluminum rivets.
I was able to use my side cutters and squish the rivet, and the speaker came right out.
attached the new one with about 5 dabs little dabs of goop.
So if your classic 1 / 2 has no sound from the internal speaker, check it with your meter.
It may be bad.
Careful. The higher impedance means the output circuit is designed with that in mind.
With a lower impedance speaker, the sound will be much louder with higher distortion, However it will cause the output stage to be driven harder, resulting in failure. there has to be a reason why they chose that impedance.
I deal with this every single day in the car audio world, people hooking up 1 ohm loads to 4 ohm stable amplifiers and blowing them up.
With a lower impedance speaker, the sound will be much louder with higher distortion, However it will cause the output stage to be driven harder, resulting in failure. there has to be a reason why they chose that impedance.
I deal with this every single day in the car audio world, people hooking up 1 ohm loads to 4 ohm stable amplifiers and blowing them up.
Thank you for your post on the speaker. I am going to check mine now.
maybe there is a dot between 63, witch would make it 6.3? i don't know.
I will say this LC speaker the sound at #7 is LOUD but not distorted, its crisp.
Maybe because of those enhanced sound holes apple drilled into the side I don't know.
Maybe they installed the wrong speaker at the APPLE Philippines Devision and that is why it blew in the first place.
as we all know mistakes do come from the factory.
I will say this LC speaker the sound at #7 is LOUD
but not distorted, its crisp.Maybe because of those enhanced sound holes apple drilled into the side I don't know.
Maybe they installed the wrong speaker at the APPLE Philippines Devision and that is why it blew in the first place.
as we all know mistakes do come from the factory.
Its really a 68 Ohm speaker, I tested a good one from my Classic I 
So if one could source a replacement speaker, then it's working again? Perhaps it would be helpful to ask others with the same issue if this could be the cause...
EDIT: To be honest with you, I didn't know you could get such high resistance speakers.
EDIT: To be honest with you, I didn't know you could get such high resistance speakers.
I have many parts machines… the LC speaker works fine. It's the same size and everything.
Sounds fantastic… -- @"7" it might be producing a little louder Volume then the stock one in there…
but the audio is rich and distortion free.
I am thinking that speaker in there is WRONG… that is why it blows in the first place.
Sounds fantastic… -- @"7" it might be producing a little louder Volume then the stock one in there…
but the audio is rich and distortion free.
I am thinking that speaker in there is WRONG… that is why it blows in the first place.
Unlikely. That would only be true if the original was of a lower impedance than the current replacement.
regardless LOL…
This is not a car audio system, or an audiophiles home entertainment system.
as long as it still makes BEEPS AND BONGS. I'm sure one would be satisfied.
Any typical round (magnetically shielded) computer speaker you glue there is going to work.
will work better then whats already there…. witch is dead.. ( if its dead )
Let's just say the OEM one died because of quality issues… Yeah that sounds good! sure.
This is not a car audio system, or an audiophiles home entertainment system.
as long as it still makes BEEPS AND BONGS. I'm sure one would be satisfied.
Any typical round (magnetically shielded) computer speaker you glue there is going to work.
will work better then whats already there…. witch is dead.. ( if its dead )
Let's just say the OEM one died because of quality issues… Yeah that sounds good! sure.
LOL. Well it looks good from my house.
As long as it works. I just have to take a look at it from an analytical/electronics dork standpoint.
As long as it works. I just have to take a look at it from an analytical/electronics dork standpoint.
lol dork
yea I know it
did you end up sending those 2 se/30 boards back to ur buddy in japan?
No. not yet. I need to though.
man your terrible
Yea well it sucks working 2 jobs.
well sounds like your keeping the family fed!
Its just me. Dont have a family.
Both are relatively low-paying jobs (there are no jobs in my area). But just enough to keep the bills paid.The type of work I am in isnt paycheck-to-paycheck. (Both jobs are contract based jobs). Its work work work, get a lump sum, then work work work again. lol.
Luckily though, job2 is pretty much dead until about middle of january as everyones gone on vacation for the holidays and repairs/requests arnt coming in either. So technically I am only working 1 job right now which is why I have excess time to blow posting on the forum. lol.
For the record, I have two new Classic II replacement analog boards. They both have 63 ohm 2.5 watt speakers. Can not tell if it should read 6.3, but they appear to be 63.
read it with your ohm meter
Reading was 60 ohm and 58.6 ohm. Third parts board was 58.7 ohm.
Correction to last post, wattage is 0.25 not 2.5 at I wrote. Have a bit of a sinus infection. Third parts board has very clear printing on speaker. Picture attached.
sweet, well the 16Ω LC speaker i'v installed in mine is still running strong.
I even played "I'm too sexy.AIFF" at full blast for 20 minutes… my wife came in and told me to TURN THAT CRAP OFFFFFFF!
example of the mac portable running that AIFF
https://plus.google.com/photos/100890837144428718359/albums/5947846783905982433?banner=pwa
I even played "I'm too sexy.AIFF" at full blast for 20 minutes… my wife came in and told me to TURN THAT CRAP OFFFFFFF!
example of the mac portable running that AIFF
https://plus.google.com/photos/100890837144428718359/albums/5947846783905982433?banner=pwa
Thats just not right.... lolsweet, well the 16Ω LC speaker i'v installed in mine is still running strong.I even played "I'm too sexy.AIFF" at full blast for 20 minutes… my wife came in and told me to TURN THAT CRAP OFFFFFFF!
example of the mac portable running that AIFF
https://plus.google.com/photos/100890837144428718359/albums/5947846783905982433?banner=pwa
what the Classic II and the Portable are so sexy they hurt
I agree. That was definitely crap..sweet, well the 16Ω LC speaker i'v installed in mine is still running strong.I even played "I'm too sexy.AIFF" at full blast for 20 minutes… my wife came in and told me to TURN THAT CRAP OFFFFFFF!
example of the mac portable running that AIFF
https://plus.google.com/photos/100890837144428718359/albums/5947846783905982433?banner=pwa
what that song, or playing AIFF's on vintage mac's?
its a pretty catchy tune LOL!!!
its a pretty catchy tune LOL!!!
Mods, please lock this thread.
)
) I think it works out as a fine Test track, for mac speaker performance testing analysis. A fine range Low's - High's - Mid's
The song... oh god the song....
I was a kid when that came out, and I hated it then. LOL.
Its almost as bad as the song thats went viral, "The fox". That song is just....... (loss for words)
I was a kid when that came out, and I hated it then. LOL.
Its almost as bad as the song thats went viral, "The fox". That song is just....... (loss for words)
At least the Fox song was a joke - the artist was the U.S. equivalent to Weird Al. He made it in jest, never thinking it would take off.
Yea, well it took off. and it plays so often that it burns into my brain. lol. It seems like just about every radio station is playing it, and im hearing it on internet radio often too. Almost just like that LMFAO song a couple years back, sexy and i know it, which ironically similar category as the song being discussed earler.
how about:
baby got back
baby got back
I like sir-mix-alot. I dunno too much about that song though.
But ALOT of his other work gets un-noticed. hes written a TON of songs, and quite a few using the Roland-808. The famous 808 cowbell LOL.
But ALOT of his other work gets un-noticed. hes written a TON of songs, and quite a few using the Roland-808. The famous 808 cowbell LOL.
Well it's official my classic had a bad speaker. Tested the extra boards I have and out of seven six were bad. So I put in a good one and boom sound. So I need to solder it in (it's late) then screw it in then button it up.
ok great then that might also be scott's issue as well with his classic.
Should do "Posse on Broadway" from the Swass album...how about:baby got back
'course, the CRT image might begin jiggling from all the bass... hehe-J
Im beginning to wonder, Disassemble the dead speaker.
I wonder if the coil is being corroded/eaten away by the enamel they used to coat the voice coil wire to give it its insulative properties.
I wonder if the coil is being corroded/eaten away by the enamel they used to coat the voice coil wire to give it its insulative properties.
Ill do a take apart but I would guess moisture break down.
awesome.. I am going for shoddy materials/build quality.
or maybe when the caps go, creates an adverse effect, sending too much current to the speaker blowing the coil.
or maybe when the caps go, creates an adverse effect, sending too much current to the speaker blowing the coil.
i dug mine outta the trash and tore it open.
looks like the little wire right before it goes into the voice coil, cooked.. it looks black, to where the other wire does not.
[attachment=0]Screen Shot 2014-01-04 at 3.15.22 PM.png[/attachment]
otherwise the coil looks to be in pretty good shape.
looks like the little wire right before it goes into the voice coil, cooked.. it looks black, to where the other wire does not.
[attachment=0]Screen Shot 2014-01-04 at 3.15.22 PM.png[/attachment]
otherwise the coil looks to be in pretty good shape.
That means the Speaker was getting DC. Which also means, the speaker amplifier is DC-Coupled to the audio output stage, and bad capacitors I guess could affect the DC Offset.
Need to measure the output connections and be sure there is no DC sitting there.
Need to measure the output connections and be sure there is no DC sitting there.
ah the speaker was getting constant dc voltage… i see. yeah i guess i should take my multimeter and see if there is an constant voltage going to it…
i am thinking now that the caps have been changed… it will probably be fine.
i am thinking now that the caps have been changed… it will probably be fine.
Probably so. Word of caution for non-recapped classic owners. If the caps are bad, you'll have DC on your speaker and itll smoke.