The car radio (Blaupunkt) smokes my speakers. A squeak appears and the speakers burnt. On aliexpress you can buy a radio with an LCD display for PLN 200. How do they work? Or maybe it's better to add and buy with android? Does anyone have experience with such radios?

You must clarify my friend, because no one knows how the radio with LCD display works for PLN 200 it's a bit like you would ask, how does Mercedes with climate work for 2,000 PLN from a dealer.

Hello.Troche did not write much about your radio, it burns the speakers because the power terminal is damaged (Blaupunkt) .New radio should not be a problem unless the parameters of the speakers do not correspond to what you will drive them.np for low power, inappropriate impendance. I write in general because in your description there is also not much to say about, e.g. car type, speakers installed, type of radio except that it is Blaupunkt.

Sure. Blaupunkt has made you angry from looking at you. My name is not Blaupunkt, but I'd love to snap your toes

Alternatively, look for the diagram from this radio. Throw in here, we will try to remedy. Excitation can also be caused by damage to the Zobel circuit, i.e. a resistor with a value of several ohms in series with the capacitor and the whole in parallel with the speaker.

The original radio is Blaupunkt Travelpilot DX170. I am looking for a schematic. Radios from Ali, it's usual with the name b from the name, type: LPylWL a2g0s.8937460.0.0.LPylWL 2114.search0104.3.15.28c33a312VYsoJ & ws_ab_test = searchweb0_0, searchweb201602_4_10152_10065_10151_10344_10068_5722815_10342_10343_10340_10341_5722915_10698_10697_5722615_10696_10084_10083_10618_10304_10307_10301_5722715_5711215_10059_5723015_10534_308_100031_10103_441_10624_10623_10622_5711315_5722515_10621_10620, searchweb201603_19, ppcSwitch_5 & algo_expid = 305811fd-5a3d-4ed4-a293-022cb7ee8b7c-2 & algo_pvid = 305811fd-5a3d-4ed4-a293-022cb7ee8b7c & priceBeautifyAB = 0 That's why I'm asking if anyone has or had such a miracle and how does it work?

Hello. You will probably have a problem with mechanical mounting on Good Morning - there are no pockets for them. Unless the original holes from the removed Blaupunk match. Personally - I'd rather fix Blaupunkt than play Chinese CarAudio. I installed 2 pcs. Vordon HT-869V2. There is no revelation - it works, but the headunits that replaced the above-mentioned Vordon sounded much better (in Skoda Fabia I had 2 years Sony, in Renault Megane 2 years old Kenwood. Installation problems due to the lack of dedicated pockets / half-frames (assembled about a year ago). Greetings.

I'm for repair. But who will do this to me? I returned for repair in the city. The guest has very good reviews, but he did not, because he played for several days without a fault. It also sounds like this to me, sometimes for a long time, and sometimes smokes 2 speakers a week. And always the left front.

Different nature of the load In your and guest's tests. Maybe a different supply voltage. You can see from the fact that the front smoke is probably the tweeter. I wonder if this guy connected it at all or just what was there by accident? I would check the other speakers in this channel if you were you. Maybe they have some shortcuts, i.e. a short circuit between the turns of the coil.

I have to replace all the speakers to check if maybe one is shorting?

Hello. While the loudspeaker is installed in the door (left, front from the driver's side, most often used), the reason for this phenomenon may be a damaged wire (worn insulation, wire shorted to the car ground). I had this case. greetings

Radio from Aliexpress - purchase instead of the original radio

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#1 17164364 12 Apr 2018 21:03

gruniu gruniu

Level 18

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Post #1
17164364 12 Apr 2018 21:03

The car radio (Blaupunkt) smokes my speakers. A squeak appears and the speakers burnt.
On aliexpress you can buy a radio with an LCD display for PLN 200. How do they work? Or maybe it's better to add and buy with android?
Does anyone have experience with such radios?
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#2 17164446 12 Apr 2018 21:33

matej1410 matej1410

Level 25

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Post #2
17164446 12 Apr 2018 21:33

You must clarify my friend, because no one knows how the radio with LCD display works for PLN 200 it's a bit like you would ask, how does Mercedes with climate work for 2,000 PLN from a dealer.
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#3 17164452 12 Apr 2018 21:34

zadam64 zadam64

Level 39

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Post #3
17164452 12 Apr 2018 21:34

Hello.Troche did not write much about your radio, it burns the speakers because the power terminal is damaged (Blaupunkt) .New radio should not be a problem unless the parameters of the speakers do not correspond to what you will drive them.np for low power, inappropriate impendance. I write in general because in your description there is also not much to say about, e.g. car type, speakers installed, type of radio except that it is Blaupunkt.
#4 17164470 12 Apr 2018 21:41

JacekCz JacekCz

Level 42

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Post #4
17164470 12 Apr 2018 21:41

gruniu wrote:
The car radio (Blaupunkt) smokes my speakers. A squeak appears and the speakers burnt.

Sure.
Blaupunkt has made you angry from looking at you.

gruniu wrote:
As for tensions, I don't even know how to check them. He does such things sporadically, i.e. as needed.

https://www.elektroda.pl/rtvforum/topic3412548.html

My name is not Blaupunkt, but I'd love to snap your toes
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#5 17164499 12 Apr 2018 21:50

matej1410 matej1410

Level 25

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Post #5
17164499 12 Apr 2018 21:50

Alternatively, look for the diagram from this radio. Throw in here, we will try to remedy. Excitation can also be caused by damage to the Zobel circuit, i.e. a resistor with a value of several ohms in series with the capacitor and the whole in parallel with the speaker.
#6 17164826 13 Apr 2018 06:31

gruniu gruniu

Level 18

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Post #6
17164826 13 Apr 2018 06:31

The original radio is Blaupunkt Travelpilot DX170.
https://obrazki.elektroda.pl/6269931700_1523593536.jpg
I am looking for a schematic.

Radios from Ali, it's usual with the name b from the name, type:
https://www.aliexpress.com/item/2-Din-7-inch-...-audio/32812082502.html?spm=a2g0s.8937460.0.0. LPylWL
https://www.aliexpress.com/item/Car-Stereo-Bl...Car-Radio-ISO-power-Aux/32838889163.html?spm= a2g0s.8937460.0.0.LPylWL
https://www.aliexpress.com/item/NEW-2-Din-and...S-Navigation-7-HD-Touch/32829728833.html?spm= 2114.search0104.3.15.28c33a312VYsoJ & ws_ab_test = searchweb0_0, searchweb201602_4_10152_10065_10151_10344_10068_5722815_10342_10343_10340_10341_5722915_10698_10697_5722615_10696_10084_10083_10618_10304_10307_10301_5722715_5711215_10059_5723015_10534_308_100031_10103_441_10624_10623_10622_5711315_5722515_10621_10620, searchweb201603_19, ppcSwitch_5 & algo_expid = 305811fd-5a3d-4ed4-a293-022cb7ee8b7c-2 & algo_pvid = 305811fd-5a3d-4ed4-a293-022cb7ee8b7c & priceBeautifyAB = 0

That's why I'm asking if anyone has or had such a miracle and how does it work?
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#7 17164921 13 Apr 2018 08:27

D_Mrozu D_Mrozu

Level 21

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Post #7
17164921 13 Apr 2018 08:27

Hello.
You will probably have a problem with mechanical mounting on Good Morning - there are no pockets for them. Unless the original holes from the removed Blaupunk match.
Personally - I'd rather fix Blaupunkt than play Chinese CarAudio.
I installed 2 pcs. Vordon HT-869V2.
There is no revelation - it works, but the headunits that replaced the above-mentioned Vordon sounded much better (in Skoda Fabia I had 2 years Sony, in Renault Megane 2 years old Kenwood.
Installation problems due to the lack of dedicated pockets / half-frames (assembled about a year ago).
Greetings.
#8 17165157 13 Apr 2018 10:50

gruniu gruniu

Level 18

» | Topic author Helpful post? (0)

Post #8
17165157 13 Apr 2018 10:50

I'm for repair. But who will do this to me? I returned for repair in the city. The guest has very good reviews, but he did not, because he played for several days without a fault.
It also sounds like this to me, sometimes for a long time, and sometimes smokes 2 speakers a week. And always the left front.
#9 17165200 13 Apr 2018 11:15

jaszczur1111 jaszczur1111

Level 33

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Post #9
17165200 13 Apr 2018 11:15

Different nature of the load In your and guest's tests. Maybe a different supply voltage. You can see from the fact that the front smoke is probably the tweeter. I wonder if this "guy" connected it at all or just what was there by accident? I would check the other speakers in this channel if you were you. Maybe they have some shortcuts, i.e. a short circuit between the turns of the coil.
#10 17170621 16 Apr 2018 13:42

gruniu gruniu

Level 18

» | Topic author Helpful post? (0)

Post #10
17170621 16 Apr 2018 13:42

I have to replace all the speakers to check if maybe one is shorting?
#11 17170683 16 Apr 2018 14:25

gumisie gumisie

Level 43

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Post #11
17170683 16 Apr 2018 14:25

gruniu wrote:
It also sounds like this to me, sometimes for a long time, and sometimes smokes 2 speakers a week. And always the left front.
Hello.
While the loudspeaker is installed in the door (left, front from the driver's side, most often used), the reason for this phenomenon may be a damaged wire (worn insulation, wire shorted to the car ground). I had this case.
greetings
#12 17170728 16 Apr 2018 14:59

gruniu gruniu

Level 18

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Post #12
17170728 16 Apr 2018 14:59

I have already laid a new cable. And the speaker burned anyway.
I did not notice the specific situation when the radio smokes the speaker. A squeak appears and begins to smell.
#13 17170925 16 Apr 2018 16:55

jaszczur1111 jaszczur1111

Level 33

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Post #13
17170925 16 Apr 2018 16:55

This is due to tip excitation. The very reason for this excitation is not clear. I don't know how many speakers you have there, but you can swap them sides (on the radio itself) how it will burn the speakers on the other side, that means a problem on the radio.
#14 17171981 16 Apr 2018 23:48

zadam64 zadam64

Level 39

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Post #14
17171981 16 Apr 2018 23:48

Hello. How many times do you have to test? Do you burn all the speakers you have ?!
#15 17219752 14 May 2018 09:37

gruniu gruniu

Level 18

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Post #15
17219752 14 May 2018 09:37

I put on the radio from Aliexpress. It plays nicely. Touchpad.
Only squeaks when increasing turnover. Will the interference filter, inserted on a 12V power supply, with the Allegro do the trick?
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Topic summary

✨ The discussion revolves around issues with a Blaupunkt car radio that is damaging speakers, leading to a query about purchasing a cheaper radio from Aliexpress. Users suggest that the speaker damage may be due to a faulty power terminal or mismatched speaker specifications. Recommendations include checking the wiring and speaker compatibility, as well as considering repairs to the original Blaupunkt unit instead of opting for a low-cost alternative. Some users share experiences with radios from Aliexpress, noting potential installation challenges and sound quality concerns. The conversation also touches on the importance of ensuring proper electrical connections to prevent further damage to speakers.
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FAQ

TL;DR: Burning speakers? In this case, “always the left front” and “2 speakers a week” flagged a bad output stage, not speakers. A basic AliExpress 2‑DIN can work, but expect noise and fit issues; fix wiring/grounding first. [Elektroda, gruniu, post #17165157]

Why it matters: This helps drivers decide whether to repair a Blaupunkt OEM unit or swap to an AliExpress head unit without frying more speakers.

Quick Facts

Double‑DIN opening: 180×100 mm per ISO 7736. [ISO, 2004]
Universal 2‑DIN units often need vehicle‑specific pockets/frames; expect installation hurdles. [Elektroda, D_Mrozu, post #17164921]
Typical head‑unit power: approx. 4×15–22 W RMS into 4 Ω; ignore “50×4” peak hype. [Crutchfield, 2023]
Most head units expect 4–8 Ω loads; 2‑Ω loads can overheat or trip protection. [Crutchfield, 2023]
Engine‑RPM whine is usually grounding/routing; use a noise filter only after wiring fixes. [Crutchfield, 2023]

Why did my Blaupunkt burn the same speaker repeatedly?

Repeated failure on one channel points at the head unit, not the speaker. Squeal before failure suggests amplifier oscillation. A failed Zobel network or damaged output IC can cause this. Repair requires checking the R‑C snubber across the output and the power amp IC. Match speakers to the rated impedance. [Elektroda, matej1410, post #17164499]

How can I quickly confirm if the radio is at fault, not the speaker or cabling?

Do this fast isolation test.

Swap left/right speaker outputs at the radio.
If the fault moves sides, the radio channel is bad.
If it stays, inspect the door harness and test with a known‑good speaker. Keep volume modest during tests to avoid further damage. [Elektroda, jaszczur1111, post #17170925]

Do I need to replace all speakers to check for a short?

No. Measure DC resistance with a multimeter. A 4‑ohm speaker reads about 3–4 ohms. Remove the door connector and check for continuity to chassis. Swap one known‑good speaker onto the suspect channel for confirmation. Replace only failed drivers after testing. [Crutchfield, 2023]

What is the Zobel network and how can it blow speakers when it fails?

The Zobel (Boucherot) network is a resistor in series with a capacitor across the output. It stabilizes the amplifier at high frequencies. If it opens or drifts, the amp can oscillate ultrasonically. That overheats voice coils even when music sounds normal. Replace the failed parts during repair. [Elliott, 2014]

Could a damaged door wire be the real cause of burned speakers?

Yes. A chafed door‑loom wire can short the speaker lead to the car body. That overloads the channel and can burn drivers. It might only short when the door moves, creating a tricky intermittent. Inspect and reroute or replace the door wiring if insulation is worn. [Elektroda, gumisie, post #17170683]

Why couldn’t the repair shop reproduce the fault on the bench?

Bench tests often use different loads and voltages. Vehicle wiring and speakers present reactive loads that can trigger oscillation. Supply voltage and temperature also change in the car. Those differences can hide an intermittent until it is back in‑vehicle. [Elektroda, jaszczur1111, post #17165200]

Are cheap AliExpress 2‑DIN radios any good compared to brand units?

They work, but expect compromises. An installer replaced Vordon units with Sony and Kenwood, which sounded better. “There is no revelation - it works.” Budget units can be fine for basics, but quality and fit vary. [Elektroda, D_Mrozu, post #17164921]

Will a 12 V “noise filter” fix engine‑RPM squeal?

That squeal is alternator whine or a ground loop. Fix wiring first: ground the radio to bare metal, separate power and signal runs, and secure battery and chassis grounds. Add a noise filter or ground‑loop isolator only if wiring fixes do not stop the whine. [Crutchfield, 2023]

Will a universal 2‑DIN fit my car without extra brackets or trim?

Often not. Many cars lack ready pockets or half‑frames for generic 2‑DIN units. Expect to buy vehicle‑specific mounting kits and trim. Without them, installs are difficult and look unfinished. [Elektroda, D_Mrozu, post #17164921]

What power and impedance should I plan for with head units?

Most head units deliver about 4×15–22 W RMS into 4‑ohm speakers. Keep each channel at 4–8 ohms. Avoid paralleling speakers on one channel or using 2‑ohm loads on the built‑in amp. Use an external amplifier if you need more power. [Crutchfield, 2023]

Should I repair the Blaupunkt DX170 or switch to an Android/Chinese unit?

Repair preserves OEM fit and often better radio reception. Android units add features but can compromise sound and fit. As one member said, “I’d rather fix Blaupunkt than play Chinese CarAudio.” Choose based on features, cost, and install effort. [Elektroda, D_Mrozu, post #17164921]

Where can I get a schematic for the Blaupunkt TravelPilot DX170?

Search for a service manual by full model and board codes. Forum helpers asked for the diagram to diagnose output issues. If public manuals are unavailable, contact car‑audio service centers or Blaupunkt specialists who can source them. [Elektroda, matej1410, post #17164499]

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