Verwendung der Apple Pro Speaker mit einem Klasse-D-Verstärker.

Geschrieben von: rafael
  • Kommentare: 48
Verwendung der Apple Pro Speaker mit einem Klasse-D-Verstärker.

Schwierigkeitsgrad

Schwierig

Schritte

11

Zeitaufwand

20 Minuten

Einleitung

Die Apple Pro Speaker lassen sich an aktuellen Macs etc. wegen des vorhandenen Spezialsteckers nicht verwenden. Die alten G4-Macs haben über diesen Spezialstecker ein verstärktes Signal an die Lautsprecher geschickt.

Manche Anleitungen erklären, wie man die Speaker mit einem 3,5 mm Klinkenstecker verwenden kann, aber das ist keine saubere Lösung, da sie Speaker einen Verstärker brauchen.

Eine Lösung mit dem Griffin iFire Adapter kommt aus Kostengründen nicht mehr infrage, weil dieser nur noch gebraucht zu überhöhten Preisen (300,- bis 500,- € bei eBay) erhältlich ist.

Ein Klasse-D-Verstärker kostet aktuell ca. 35,- €. Solche Modelle lassen sich wahlweise per Kabel oder per Bluetooth 5.0 ansteuern.

  1. aUwHdYwFMqZli3hn

    • Dieses Bild zeigt das fertige Setup. Mit ein bisschen Arbeit kannst du bald den klaren Sound der true harman kardon Lautsprecher genießen.

    • Bitte beachte: In diesem Guide werden die original Kabel/Anschlüsse, mit denen die Apple Pro Speakers an einen iMac, Power Mac oder den Griffin iFire angeschlossen werden, zerstört.

    • Bitte beachte auch, dass du – wie bei jeder elektronischen Reparatur- oder Änderungsanleitung – allein für deine eigene Gesundheit und die Gesundheit anderer verantwortlich bist. Beachte auch, dass du allein für beschädigte elektronische Geräte verantwortlich bist.

  2. DJ2I3pTuqSZh1PqL

    • Schneide beide Lautsprecherkabel ab. Für die maximale Länge der Kabel, schneide sie nahe des weißen "Knopfes", der die Kabel zusammenführt.

  3. IOXEaESOr4jJ5cEM

    • Entferne etwa 5 Zentimeter der Isolierung bei beiden Kabeln mit einer Schere oder einem passenden Werkzeug. Sei vorsichtig und beschädige die Kabel selbst nicht.

    • In jedem Kabel sind zwei Leitungen.

  4. fBXK6LntZTaufujM

    • Jetzt entferne die Isolierungen der inneren Leitungen. Achte wieder darauf, die Drähte nicht zu zerschneiden, sie sind sehr dünn.

  5. qAiZWtyJWuTIaSol

    • Jetzt müsste es etwa so aussehen.

  6. xI1QiethmST51MNB

    • Jetzt müssen wir die Polarität der Lautsprecher rausfinden, also, welches Kabel + und - ist.

    • Leider habe ich damals nicht die Kabel fotografiert, aber hier ist ein einfacher Trick, um das herauszufinden.

    • Hier sind zwei Bananenstecker und eine AA Batterie. Stell dir vor, die Kabel führen zu einem Lautsprecher.

  7. XOFohUsvADyHipB1

    • Verbinde nun die beiden Anschlüsse eines Lautsprechers mit den Polen einer AA Batterie (es kann auch eine AAA Batterie sein).

    • Wenn sich die Lautsprechermembran nach außen wölbt (linkes Bild), handelt es sich um die richtige Polarität. Der am Pluspol der Batterie anliegende Draht kennzeichnet '+' für den Lautsprecheranschluss am Verstärker.

    • Sollte sich beim Anschluss an die Batterie die Lautsprechermembran nach innen wölben (wie im rechten Bild), ist die Polarität vertauscht. In diesem Fall markiert der am Minuspol der Batterie anliegende Draht '+' für den Lautsprecheranschluss am Verstärker.

    • Anmerkung: Vermutlich kennzeichen bei allen Pro-Speakern der gelbe und der weiße Draht jeweils '+'.

  8. wNRAsOgEE3w1XPB1

    • Jetzt löte eine Verlängerung an die beiden Kabel. Wenn du willst nutze rot für + und schwarz für -, das macht es dir später leichter.

  9. PRulILiErDECw1Yp

    • Nun müssen wir die Löstellen noch sauber abisolieren. Nutze dafür Schrumpfschläuche oder Isolierband.

    • Du kannst auch noch einen großen Schrumpfschlauch über beide Leitungen ziehen, damit du später wieder ein Kabel pro Lautsprecher hast.

  10. gWYTlSVksJNfhV5Y

    • Die Kabelenden werden abisoliert. Sie können noch mit Lötzinn gesichert werden. Die Drahtenden werden am Verstärker eingeklemmt.

    • Wahlweise können aber auch Bananenstecker mit den Drahtenden verbunden werden, so dass die Lautsprecherkabel eingesteckt werden.

  11. f5dSrBjPecXFXMJ1

    • Du bist fast fertig. Verbinde die Lautsprecherkabel mit deinem Verstärker. Verbinde deinen Computer oder ein anderes Abspielgerät mit dem Verstärker und genieße deine alten neuen Apple Pro Speaker.

    • Beachte bitte, dass die Apple Pro Speaker schon immer nicht sehr laut waren. Das soll so. Aber dank des Verstärkers haben sie einen klaren und sauberen Klang.

Tinte & Feder

rafael

Mitglied seit: 30/10/12

1256 Reputation

48 Kommentare

Amp shown appears to be a Muse Audio M20 EX2 TA2020

dick -

Good guide. I'm doing the same thing with a pair of these speakers, but I think I'll use new cables soldered to the speaker terminals.

One quibble though. I believe the correct term for the wire covering is "insulation", not isolation, and in step 9, you "insulate" the wires, rather than isolate.

Chuck -

Thanks chuck, I have corrected the wire covering term :)

rafael -

Will this amplifier work for my Apple Pro speakers?

http://www.amazon.com/LP-2020A-Lepai-Tri...

Brian Hernandez -

Should work. Not the 'best' amp out there, but same tripath chip as most other class-d amps on the market.

rafael -

Yes, I actually bought that amp last week and it worked a treat with these apple speakers.

downs -

I just did this successfully, thanks for the writeup. :) For the record, these were the wire colors and polarities on the set I had:

Left speaker: Blue = negative, white = positive

Right speaker: Brown = negative, yellow = positive

But who knows whether that's consistent? Anyway I reinforced the connections with a combination of heat shrink tubing and Sugru, since the wires are so teensy, and got the exact amp used here from eBay for about $25. Nice to give these speakers a new lease on life. :)

mbates -

Great to hear that :] It's a good thing to see some Pro Speakers getting revived!

rafael -

For the record, I had exactly the same colours and polarity.

Thanks for the great guide - my speakers are working perfectly again!

phwells -

Just to confirm that I had the same polarities.

Also, to add, here are the matching connector rings:

Tip: White, Left (+)

Ring 1: Blue, Left (-)

Ring 2: Brown, Right (-)

Ring 3: Yellow, Right (+)

Hiyel -

Thanks so much for the note on the speaker wires. I cut off the plug and stripped the cable from the connector, cut away the insulation and extraneous wires, stripped a half inch off the four key wires, and hooked it up to a Kinter K2020A+ amp. It is pretty simple project if you don’t try to put on thicker wires and banana plugs (unnecessary for this amp that has only spring clip connections). It's a really nice set up for computer sound — plenty loud for one person at a desk, but definitely not a set up to fill a big room with sound.

Peter Litman -

You can send a link to purchase amp correct?

Thanks

Ciao

dduniv -

Thanks. Great guide. It looks like after step 4, the wires can be used in an amp with those spring loaded clip connector, rather than having to solder an extension and put on the RCA connectors.

smegma -

Sure, you can just connect the speakers directly!

rafael -

I have these speakers, plus the subwoofer designed to work with them. It attaches directly to the computer via USB cable and has its own power brick. Will I be able to use the subwoofer with these speakers after completing the project above?

LarryH -

This will most likely not work, as the USB Subwoofer has to be supported by your operating system. As far as I remember Apple stopped support for those USB subwoofers a long time ago and in addition to that they were only supported on few computers (like the second generation iMacs). Even if it would work, you'd have two separate volumes – one for the subwoofer and one on the Pro Speakers amp. It's a pity. Long ago I had an iMac "snow" in combination with this USB iSub and it sounded terrfic. What you could do is to disassemble the sub and connect the speaker directly with the amp where you also hook up the Pro Speakers, but this requires a little bit more technical insight and I would not recommend to do it.

rafael -

What Amp should we use or witch model is this

Andres -

Answered above already. Anyway, you can use any Class-D / Class-T amp.

rafael -

This completely worked for me. I used a Muse Audio M20 EX2 TA2020, which I ordered through Amazon (it shipped from China). The wire colors were the same for me as mentioned earlier: Left speaker: Blue = negative, white = positive, Right speaker: Brown = negative, yellow = positive. I've been holding onto these speakers for a long time, hoping there would be a way to use them again. Thanks for the guide, and for everyone's comments!

Dennis -

Hello,

Your post is amazing , thank you very much !

Your project has made me think of a more ambitious project since I have not used these beautiful speakers also the first Soundsticks and Subwoofer .

Is it possible that there is a type of amplifier that would connect the pair of Apple Pro Speakers (4 inputs) , Soundsticks another pair of Harman / Kardon (4 more inputs) and also Subwoofer Harman / Kardon (1 more input) . In all 5 pairs of inputs.

If so, can you tell me what kind of amplifier would be.

I hope you can help me and tell me whether to start , you think appropriate the project.

arturo barrera -

pefect, thanks a lot

man

Michele Angelo Narracci LR -

Great guide, thanks a lot! I'm pretty amazed how great the speakers sound. Kudos to you!

Jan Sieroslawski -

Also did the same way and it is Success! )) Works like a charm! )) Pro Speakers with two white Cinemas and Mac Pro is best!

armdn -

I like the description given of how to connect the speakers to a small amp, and despite my extreme novice status, I think I can pull this off. One thing I'm not clear on, however, is the means by which to connect the amp to the source. (In my case, it'll be a Mid-2010 iMac.) Is this so simple it simply isn't mentioned? Help appreciated, as always. Thanks.

perryclarkkc -

amps like this are usually connected to a computer by an RCA to headphones jack cable

rafael -

Sorry for this late post. Does anyone know the resistance of these speakers? Can I use it on my Kenwood 6-16 Ohm amplifier?

Geralt van 't Veld -

I've been storing these little speakers of mine for a decade, on the verge of throwing them away because I figured they were probably useless. This thread gives me hope that I can use these again!

I'm pretty good with electronics, but don't know what a class D or class T amp is exactly. Trying to figure out what to buy in Sweden that might work. Does this seem like the right kind of thing? https://www.kjell.com/se/sortiment/el-ve...

jacknutting -

Do you have a link for that amplifier you used?

Ricardo Martinez -

you can use any class D amp. the manufacturer “S. M. S. L” is recommended for good quality amps, but any will do.

rafael -

Thanks Rafael! You’re a life saver!!

*

SO needed this as I was not prepared to give up on these speakers and wasn’t going to shell out ten times what they cost me for the Griffin iFire.

*

About the speaker wire polarity and for future reference- one speaker has one blue and one white wire- the white one is the positive. The other speaker has one brown and one yellow with the yellow being the positive. Basically the paler ones are positives, the darker in the pair- negatives. You can see the pairs your set have at the back of the speakers due to the casings being clear.

*

And I actually repurposed the single cable (the one post “white knob” with the plug) by cutting it in half and then isolating the redundant wires (red and black for power on both and either the blue/white set or the brown/yellow sets, depending on which speaker I was working on. This resulted in only the blue/white or the brown/yellow pair being matched all the way to the new plug ends. ;)

The Lady from UNCLE -

Thanks Rafael! You’re a life saver!!

*

SO needed this as I was not prepared to give up on these speakers and wasn’t going to shell out ten times what they cost me for the Griffin iFire.

*

About the speaker wire polarity and for future reference- one speaker has one blue and one white wire- the white one is the positive. The other speaker has one brown and one yellow with the yellow being the positive. Basically the paler ones are positives, the darker in the pair- negatives. You can see the pairs your set have at the back of the speakers due to the casings being clear.

*

And I actually repurposed the single cable (the one post “white knob” with the plug) by cutting it in half and then isolating the redundant wires (red and black for power on both and either the blue/white set or the brown/yellow sets, depending on which speaker I was working on. This resulted in only the blue/white or the brown/yellow pair being matched all the way to the new plug ends. ;)

The Lady from UNCLE -

Thanks Rafael! You’re a life saver!!

*

SO needed this as I was not prepared to give up on these speakers and wasn’t going to shell out ten times what they cost me for the adaptor (which shall remain nameless).

*

About the speaker wire polarity and for future reference- one speaker has one blue and one white wire- the white one is the positive. The other speaker has one brown and one yellow with the yellow being the positive. Basically the paler ones are positives, the darker in the pair- negatives. You can see the pairs your set have at the back of the speakers due to the casings being clear.

*

And I actually repurposed the single cable (the one post “white knob” with the plug) by cutting it in half and then isolating the redundant wires (red and black for power on both and either the blue/white set or the brown/yellow sets, depending on which speaker I was working on. This resulted in only the blue/white or the brown/yellow pair being matched all the way to the new plug ends. Perfect for someone as OCD as I am.

The Lady from UNCLE -

Fantastic…nice to have these speakers working again. Great guide. I picked up a cheap Lepy Class D amplifier off Amazon and it works well.

http://tinyurl.com/ydyyfxzb

Long ago I sold my G4 tower which was the only computer i had that these speakers worked with. I was always curious about using these with my newer computers, glad i didn’t throw them out.

Richard

Rich -

What if connect the speaker cables mentioned to computer’s headphone jack and use an old ipod’s ac power adaptor (that has firewire port for connection to ipod) to send power to the firewire cables (red /black) in the white knob?

George K.

George Kakarelidis -

Will this amp work? https://www.jameco.com/z/VMA408-Velleman... It’s not clear to me how much power these speakers actually require. Thanks!

Joe Elliott -

Thanks!

Left speaker: Blue = negative, white = positive

Right speaker: Brown = negative, yellow = positive

I just cut it at the jack. My amp has spring loaded inputs. Kinter K3118 Texas Instruments TI Digital Hi-Fi Audio Mini Class D Home Auto DIY Arcade Stereo Amplifier with 12V 3A Power Supply Black

Sounds great. Glad I didn’t throw them away!

Chewy Bacca -

I have a question. I want to use my 2002 iMac speakers with my 2014 MacMini. You Recommended: class-d / class-t, at least 15 watts per channel, 4-8 ohm. Will this work?

Eric Tangney -

Yes. Works great on my 2011 MacMini.

Chewy Bacca -

Good guide

I use a Bluetooth 5.0 Amplifier 2 Channel Stereo Amp Receiver Class D Amplifier with success

Thanks a lot

William

William Fourche -

TA2020 are difficult to find in 2021. After many hours to search, I am using a “Nobsound NS-10G Pro” which is working really well.

This model doesn’t have a Knob volume control, so Audio sources needs to have their own volume control (iPhone, Android phone, MacOS, Windows…). It is really convenient as it avoids to play with 2 different volume controls !

Like the Original Apple Pro Speakers plugged on the iMac G4 : Only 1 volume control.

Fred

Openfred -

Be careful if you want to use the Audio out from a HDMI cable on Mac, as MacOS does’t control volume of HDMI devices. You may then need to buy an amplifier with Volume control such as the NS-01G or the NS-10G (not pro).

For example, I am using a HDMI connected Dell monitor with Jack output (not powered unfortunately, thus not suitable for headphones) : if I try to connect the monitor “jack out” to the amplifier “Jack in”, the Mac send __full__ volume (through HDMI cable), and this volume is NOT controlled by the OS !

An extension called MonitorControl (available for M1) is available on GitHub, but I don’t want to tweak the OS (and don’t know how to compile)

Openfred -

I decided to dedicate the Audio jack out of the mini to the amplifier / Apple Pro Speakers, and to use a BT headphone.

Some multi pairing headphones can now be connected to both the Mac and the iPhone.

Openfred -

Fantastic! wow and wow! I just stole (just from work) a pair of theese and thought i could do a 2,5-3,5 mm. But no… So i gotta get through this. But first: Suggestions on affordable amps? I got my chromecast audio so i dont need BT or other fancy stuff. But i remote would be great - gess its hard to match that. But thanks!

Victor Lindgren -

I did it!!!!

Danke für diese Anleitung! Mein Klasse-D-Verstärker (https://www.amazon.de/dp/B096M5HJR5/ref=...) war zwar nicht so günstig, wie andere hier geschrieben haben, aber er funktioniert und die alten Schätzchen tun selbst nach fast 20 Jahren ihren Dienst. Der Sound gefällt mir beim 1.Mal besser als meine Bose Companion III am MacBook Air.

Lothar

ultraleicht -

PS: Und schwierig ist das Ganze auch nicht. Nur ein bißchen Löten - das wars.

ultraleicht -

what amp do you suggest?

Jason Engen -

We found 6of these, I plan to do this to them. Great tutorial.

Jackie DuChene -

Thanks a lot for this article. Everything is so perfectly explained, with so many pictures. It's was so easy to do it, even to find the proper polarity.

Merci beaucoup. :-) J'ai utilisé un excellent ampli, le modèle BT10A de Fosi Audio (https://www.amazon.fr/dp/B07KSWPCS4/?th=...). Cela m'a permis de remettre en fonction mes Apple Pro speakers qui dormaient dans un carton depuis plus de 10 ans.

ninicool -