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Hey guys,
I bought a One X recently, and I am noticing some static/hiss/noise coming from the headphones.
I tried connecting my One X to bigger speakers, and the noise is more noticeable this way. This is an odd issue, because none of my other phones behave this way.
The funny thing is, if you play music or notification noises play when the phone is connected to speakers, the noise goes away. But after one second, when the DAC shuts off, the noise comes back again.
My friend's One X has this problem as well, so I don't think I just have a lemon here.
Other forums seem to be talking about this issue as well
http://www.htconeforum.com/forum/htc-one-x-help/300-htc-one-x-sound-issues-headphones.html
http://www.htconeforum.com/forum/htc-one-x-help/327-sound-issue.html
I found one review that mentions this issue. They talk about it in the Beats Audio section, and there's a video with the noise.
http://www.tekgadg.com/home/2012/6/15/htc-one-x-rogers-review.html
I remember using a really cheap chinese knockoff mp3 player about 8 years ago, and the One X seems to have the same problem as that mp3 player. Could it be that the One X has a cheap DAC in it that causes this noise?
Anyone else experience this problem?
The first link is about the international version, the lte one x is technically the One XL, and this is the first time hearing about this. Mine doesn't have a problem and I listen to music all the time.
Just and idea possibly cheap headphones?
Sent from my HTC One X using Tapatalk 2
My music is crystal clear, probably one of the best quality sound outputs I've heard from a phone actually.
Mine has this problem, but I only notice when I hook it up to my car speakers (with an aux cable) and not with headphones (Bose). It's a lot more pronounced when the phone is plugged into usb as well. Once sound plays though, the hissing stops completely. It's only when there is no output that the hiss is present.
Edit: Could it possibly be interference from the cellular radio? Maybe once the DAC kicks in it filters out the interference?
Edit 2: Just read the 3rd link and yeah, my speculation seems to have some validity
"Adding insult to injury, HTC One X features a badly shielded headset jack that makes noise whenever it is hooked up to sensitive speakers. We compared it to high-end and low-end phones, and none of them made the annoying static noise that the One X makes. This isn't a serious problem for people who only listen to music through headphones, but you may want to stay away from the One X if you are thinking about playing music through it with big speakers."
I had the same problem. If you are rooted, disable beats audio notify with titanium backup. I did this and use power amp with custom eq settings and do not notice any hiss whatsoever.
Sent from my HTC One XL using XDA
Same problem here. WAY worse when plugged in and in my car. On regular headphones no problem. In my car it's huge. To me it reeked of a poor ground somewhere, to the point that I thought my unit was defective. If it were a shielding problem I would think it would be an issue all of the time, not just when the thing is "inactive" (ie not driving the jack). I've "disabled" beats to the extent that I can without rooting, and it had no noticeable difference.
Glad to hear it's not just me.
I notice the problem when I use both the microUSB charger and headphone jacket. Disconnect the charger cable usually solves my problem. Now, I switched to use BT car adapter instead of aux cable and I can use car charger without noise.
The problem is called BEATS AUDIO!
scroll to the bottom
http://www.gsmarena.com/htc_one_x-review-747p5.php
designgears said:
The problem is called BEATS AUDIO!
scroll to the bottom
http://www.gsmarena.com/htc_one_x-review-747p5.php
Click to expand...
Click to collapse
I still get the hiss despite disabling Beats (as in just turning it off in the notification shade), although it is definitely not as bad as having Beats turned on. I'll freeze HTCBeatsNotify and see if it helps on the way to work tomorrow morning.
stnguyen09 said:
I still get the hiss despite disabling Beats (as in just turning it off in the notification shade), although it is definitely not as bad as having Beats turned on. I'll freeze HTCBeatsNotify and see if it helps on the way to work tomorrow morning.
Click to expand...
Click to collapse
Sadly beats audio is integrated beyond what you can turn off in settings.
so, the only solution is to root the phone and completely kill Beats Audio?
I guess it's not a hardware problem then... Man, that sucks. Has this issue been brought to light by some big sites yet? We need to do something so HTC learns from this mistake.
By the way, here's the update I promised...
Like I said before, I disabled beats from the notification pulldown but the hiss was still there, although slightly less annoying. I froze HTCBeatsNotify (or whatever the actual name is) using TiBu so Beats doesn't even show up when I plug it in. Unfortunately, the hiss is still there at the same level it was at when I just disabled Beats from the notification pulldown.
Is Beats actually integrated into the hardware? Is the "poorly shielded headphone jack" mentioned in one of the OP's links still a valid assumption? Can someone running CM9/AOKP chime in on whether they get the hiss?
Edit: Before I head home today I'll go into Airplane mode to try to rule out the headset jack shielding.
Annnnd of course my experiment failed...hiss is still there
If the headphone jack is indeed poorly shielded, couldn't it pick up interference from anything? Not just the internal radios?
This means we'll have to go into some radio-free environment in order to determine whether it's the headphone jack or Beats Audio that causes this annoying hiss.
In either case, I'm disappointed in HTC.
ai4281 said:
If the headphone jack is indeed poorly shielded, couldn't it pick up interference from anything? Not just the internal radios?
This means we'll have to go into some radio-free environment in order to determine whether it's the headphone jack or Beats Audio that causes this annoying hiss.
In either case, I'm disappointed in HTC.
Click to expand...
Click to collapse
Well I mean, the internal radio would be the strongest signal in the immediate area that would cause interference. Just look at old, poorly shielded computer speakers, they had issues only when a phone would go off within maybe a yard of them. I was in a parking garage at the time I tested and I'm not sure if there was anything else around that would be powerful enough to cause the interference.
Also something I noticed which may lend credence to the DAC being the source of the issue...Just plugging my phone into usb and having the headphone jack attached does not produce as much interference as when I'm streaming from Google Music and it gets caught buffering. As in, when the DAC would still be active but no audio is output. The hiss during that situation is quite a bit worse than just having the phone sit there not doing anything.
Since Beats is just a glorified equalizer, it could be that Beats just happens to be boosting the sound frequencies of the hiss and making it sound louder, and not the actual source of the hiss itself. So maybe it is a hardware issue.
Again, I can't imagine ti being "poor shielding" because that would not immediately go away once you started playing music. Think about typical cell phone interference from a radio. You're playing music, and you hear that "bvvvvrerrerrr" sound.
In the case of the HTC, as soon as you start playing music, the hum goes away IMMEDIATELY and completely as far as I can tell. If shielding were the problem it wouldn't it still be distorted regardless of whether the jack was actively playing anything or not?
Seems more to me that the DAC is leaving some signals floating, leaving them susceptible to noise, when it's not active, when it should be pulling them to a known state (probably ground)
Not from DAC either. If you plug in a headphone, you will not hear these noises. It seems only occur when you plug into AUX import of car or amps.
So, it is a hardware design problem that causes dirty interference escaped into audio output. When you plug in a normal headphone, it has very low impendence and the noise will not get amplifed at all. If you plug it into an AUX import, it will have a much higher impendence and hence the noise get carrier over and amplified.
foxbat121 said:
Not from DAC either. If you plug in a headphone, you will not hear these noises. It seems only occur when you plug into AUX import of car or amps.
So, it is a hardware design problem that causes dirty interference escaped into audio output. When you plug in a normal headphone, it has very low impendence and the noise will not get amplifed at all. If you plug it into an AUX import, it will have a much higher impendence and hence the noise get carrier over and amplified.
Click to expand...
Click to collapse
Your explanation makes perfect sense. This seems to be the issue.
foxbat121 said:
Not from DAC either. If you plug in a headphone, you will not hear these noises. It seems only occur when you plug into AUX import of car or amps.
So, it is a hardware design problem that causes dirty interference escaped into audio output. When you plug in a normal headphone, it has very low impendence and the noise will not get amplifed at all. If you plug it into an AUX import, it will have a much higher impendence and hence the noise get carrier over and amplified.
Click to expand...
Click to collapse
ai4281 said:
Your explanation makes perfect sense. This seems to be the issue.
Click to expand...
Click to collapse
I think we have a winner!
hey guys,
my One S has buzzing noise coming from the headphone jack, and this problem is pretty annoying especially when it's connected to my car stereo. I thought it might be just mine, but it seems like this is a common issue.
i found this video on youtube. I have the exact same buzz from my One S, though perhaps not as accentuated as in this video.
seems like the One X has this problem as well. found this thread at the One X board http://forum.xda-developers.com/showthread.php?t=1720212
is this a grounding problem in the headphone jack? Beats Audio? what do you guys think?
I've always had this problem with more than one phone. If you charge the phone via USB adapter from the car battery, it gets 10x worse.
This problem only happens when sound is being played back, so when music/video/game sound kick in, it stops. Do you get that noise when sound is being played back?
Bernardos70 said:
I've always had this problem with more than one phone. If you charge the phone via USB adapter from the car battery, it gets 10x worse.
This problem only happens when sound is being played back, so when music/video/game sound kick in, it stops. Do you get that noise when sound is being played back?
Click to expand...
Click to collapse
The buzz is only audible when nothing is playing. Like in that video, when I stop playing music it will be silent for about 2 seconds and then the buzz kicks in again.
I didn't have this issue with other phones
I don't have any buzz, I double checked just to make sure.
Although it might be my headphones, the output is probably not strong enough to play the sound.
It's probably being heard in your car (or in the youtube video) because the output is being amplified.
I'm having the same issue with YouTube and Pandora.
xxquicksh0txx said:
It's probably being heard in your car (or in the youtube video) because the output is being amplified.
Click to expand...
Click to collapse
you're right. the issue isn't as noticeable through earbuds. i think that's why many people are saying they don't have this issue. It's still bad though.
I don't know why HTC messed up this part when no other phones seem to have this issue. Makes me sad.
If it's easy to reproduce for you guys, I'd definitely be pushing for warranty replacement.
I do not have this problem at all. On my cheap pair of headphones or on my expensive one. No hum or sound.
the buzz is there, and it also was on my Desire.
Not when playing tho, only when connected and not playing. Not too annoying, always thought it was supposed to be like that.
And no, I have never heard it through ear buds or phones, only when connected to home stereo or car stereo, and if charged through cig-lighter-outlet it amplifies further...
Closed Source Project said:
I do not have this problem at all. On my cheap pair of headphones or on my expensive one. No hum or sound.
Click to expand...
Click to collapse
It doesnt effect headphones, only when the sound is amplified. Like when you play music in your car.
Simply because that sound alone is not enough to drive the headphones.
Sent from my HTC VLE_U using xda premium
Whether its plugged in to a car or home stereo, its still using the output from the headphone jack. The power output from the jack is the same either way.
I plug mine in to the aux jack of my car stereo daily, and I have no buzz or hum. Do you have your phone plugged in to a power source at the same time? That buzz is usually caused by crosstalk from a poor quality power source.
Or, as I said earlier, it may just be a bad phone.
ptweasel said:
Whether its plugged in to a car or home stereo, its still using the output from the headphone jack. The power output from the jack is the same either way.
I plug mine in to the aux jack of my car stereo daily, and I have no buzz or hum. Do you have your phone plugged in to a power source at the same time? That buzz is usually caused by crosstalk from a poor quality power source.
Or, as I said earlier, it may just be a bad phone.
Click to expand...
Click to collapse
Well my phone doesnt do it in my headphones. I can't test in car, no aux input.
What I was saying is that, of its buzzing in your car but not on your headphones its because the sound level at which the buzz is at isn't enough to drive your ear buds. But when the car stereo amplifies it its easily driving your car speakers.
Sent from my HTC VLE_U using xda premium
My problem is that the Earphones produce a weird bug but others do not and work fine, Lol?
Doesnt Anyone face this annoying problem?????
Bump
NextGenGTR said:
Bump
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My Bose QC 15 headphones had a problem with the iPhone-compatible cable, that includes a volume control and microphone.
Another "audio only" Bose cable that omits the volume control and microphone is also available off eBay for ~$10.
I asked Bose for an Android-compatible version with volume control and microphone, and they said they're "considering making one".
normally the headphone jack provides a link for headphones with e.g. microphones or buttons (to accept calls), which uses the same wires as for the audio.
the effect can be triggered by e.g. dirty connectors. so I once had a new pair of headphones and on the connector jack there was a bit of debris (glue or whatever left). they did also cause the phone to pause/play every now and then. so I cleaned them and then they did work without problems. also sometimes the connectors have to "grind in" until there is a good electrical connection.
however as it is steadily pausing/playing on your iPhone 5 headphones, I dont think theres an issue with the connection itself.
it might just be that the iPhone 5 headphones are trying to "communicate" with your phone, which it doesnt support and therefore is misinterpreting it as the start/stop commands. you cant do anything about it I guess.
(except dont buy apple products anymore )
On my tablet I always get a slight static hiss/background noise during and a couple seconds after the tablet plays any sound.
This seems very odd to me since it's not affected by how loud the volume is (as long as sound is on, not at 0).
I don't have this on any other outputs (HDMI/BT/USB OTG/build-in speakers, all fine)
Every headset/speaker I use outputs this from cheapo Samsung in-ears to a quite expensive 2.1 setup.
I'm used to having a bit of noise at the highest volume levels (which for ex. my Note 3 has) and consider this normal.
But this is very annoying, especially when navigating the UI as I always have to endure this hiss for a couple of seconds.
I'm not sure if it's a hard or software issue, since normally static hiss always occured to me on lower-end devices with higher volume, and if it were a software issue should it not also do this on all outputs (including digital).
I haven't come across anyone with a similar issue.
Yep, this happens for me as well on my LTE version. It also happened on the Nexus 7 2013. The noise is from interference from the other board components in close proximity to the audio chip.
jaredmorgs said:
Yep, this happens for me as well on my LTE version. It also happened on the Nexus 7 2013. The noise is from interference from the other board components in close proximity to the audio chip.
Click to expand...
Click to collapse
Yes, I also have the LTE version.
Bleh, that's no fun and really annoying. I have never had anything from a reputable brand do this.
The next test would be to see if it does it through USB Audio or Bluetooth Audio. I have a Microsoft LifeChat 3000 headset that I have successfully connected to the tablet, which doesn't seem to have the hiss. It could be due to the impedance of the speakers of this headphone compared with my Shure SE425 IEMs that I notice it more. I also use Tri-flange tips on my IEMs which makes everything more pronounced.
jaredmorgs said:
The next test would be to see if it does it through USB Audio or Bluetooth Audio. I have a Microsoft LifeChat 3000 headset that I have successfully connected to the tablet, which doesn't seem to have the hiss. It could be due to the impedance of the speakers of this headphone compared with my Shure SE425 IEMs that I notice it more. I also use Tri-flange tips on my IEMs which makes everything more pronounced.
Click to expand...
Click to collapse
I did, My USB headset doesn't have this issue (plugged into the shield with a USB OTG cable), my 3.5 mm headphones and cheapo IEMs don't have the issue when plugged into a Sony SBH50 connected to the Shield (via Bluetooth), but they do have the issue when directly plugged into the Shield. Meh.
So that proves that it is the shielding on the 3.5mm jack.
Unfortunately, that's case closed. If it's any consolation, you get used to it after a while.
An update:
I tested with my PC's line-in input, and when I put it in any 24bit mode sound is crystal clear 24/7, I don't get any issues.
mic-in sounds garbage but that's to be expected (I can hear the tablet's internals cause distortion all the time.), it also doesn't always get detected by the tablet.
Is this of the lower impedance that the static noise gets filtered out? I'm not an audio expert.
Hi all,
I have purchased a PX5 unit made for my 2008 Mazda 6. Unfortunately, it suffers from an issue with the audio quality. Whenever the audio level is above 0, a static/interference noise can be heard, and the pitch of this sound changes when driving, similar to alternator whine.
This is relatively loud, and can be heard even when moving or when sound is at low volume. If required, I could create a recording of the noise. I have updated the MCU to the latest available version to no avail.
I am relatively confident at soldering and am willing/able to take the HU apart to make modifications if anyone has any recomendations as to what I can do? I have seen various hardware mods floating around, but nothing that conclusively seems to say it will help with my issue.
There is also a large amount of static/interference when using Bluetooth for calls, but mainly to the party not connected to the car (IE the person calling in can hear the noise). Unsure if this is related, but the noise appears to be a similar pattern and pitch.
This issue is present both with the car running and off, and also was present on a bench power supply during testing.
Any help would be greatly appreciated!
Should be an easy fix. https://www.crutchfield.com/ISEO-rg...car/noise_suppressors_installation_guide.html
Sent from my Z981 using Tapatalk
Thanks for the post, but unfortunately the noise is present even when connected to a bench supply, with no additional interference from the car present. There is no amplifier in this scenario, so I am fairly confident the issue comes from the HU itself. I'm not sure if there may be something I can re-route or shield inside the unit to minimise it? I don't mind if I can't eliminate it entirely, but I would. Like to minimise the issue.
Thanks!
I found that I was able to remove one aspect of the noise by turning off the colour cycling of the front LEDs. This was causing a kind of pulsating low pitch siren type noise in the audio.
It appears that having the front LEDs on anything other than full power or completely off causes the noise to varying degrees.
I still have a fair amount of cracking/static type noises, but I was able to somewhat lower the volume and improve the quality by attaching RCA cables directly to the outputs of the BD37033 chip. I'm not entirely sure what occurs after this chip in terms of sound processing, as in was difficult to trace out on the PCB. Interestingly, this modification means that the static is produced even when the unit is booting or on mute, which didn't occur before. I found this odd, as the mute functionality (And all other functionality as far as I was able to tell) is retained.
I assume the signal goes back to the MCU before going out to the factory RCA outlets and amp.
If anyone knows more, I would lose to hear it!
I have the same issue: https://www.youtube.com/watch?v=gTNJVWFpBlw&feature=youtu.be
There is a static / hissing sound when the volume is on, changing volume doesn't affect it.
I might to try to upgrade the amp chip to Pioneer PA2030A from TDA7851 to see if it will fix it...
Hi.
I have the same issue with my radio in Mazda CX-9 with Bose.
Version of the radio:
PX5 Malaysk 6.0.1 MXC89L 20170901.180527 MCU VERSION MTCD_KLD_V_2.57_1 - now I have the newest version, and the problem is still the same.
I have a lot of noise when searching for something on the radio, or connecting something under USB (at the rear panel - when I'm connecting in the front - it is OK), while listening to music quietly.
What I've done so far:
1. Upgraded to the latest version of Malaysk with of course wipe all data - nothing changed.
2. Installed: anti-interference voltage filter, it works because I can not hear feedback from the car's electrical system, the alternator is not audible anymore.
3. I wrapped the cables on the back with aluminum foil plus tape insulation - nothing changed, maybe a little less noise from the radio, but still I hear all the time.
4. I connected back to the original radio - no noise - absolute silence from the speakers
The most annoying is the increasing noise of the car during driving, I have to manually adjust the volume, which does not change anyway.
Is "the cheap" radio from China, I dont know what to do.
I think that the problem is that the radio does not work well with the Bose amplifier.
I had Mazda CX-9 without Bose, and installed cheap amp with cheap radio from China - and everything worked perfect, no noises at all ! Because the amplifier was cutting out this noise with no problem.
Here the Bose amp have huge problems with that noise, I don't know why.
This noise is nothing but the noise of data transfer over the radio, which I hear all the time once more quietly and louder, as I connect, for example, a car camera to the rear USB, this noise is unbearable.
The best solution, IMHO is to remove the Bose amplifier from the car and connect the radio to another A / B class amplifier, which is much better at reducing these disturbances.
But it is a lot of work to make the whole installation work perfectly.
Me too...
I have also got this issue with my MTCD GS unit. My car has Bose also. I have tried earthing various point/things with the head unit hanging out of the dash but no change. I have also tried disabling the WiFi & Bluetooth and again no change.
I noticed the other day when I put my headlights on and the backlights on the unit came on the noise increased slightly so there might be something in the LED thing.
Andy
Exactly same thing for me too. Cheap units..
Hi.
I'll try with:
Car Stereo Audio Wire to 4 Channel RCA High to Low Audio Level Converter Adaptor
And let you know if it is OK.
I wonder, after all, the Chinese radio has a low output to the amplifier, just through the RCA plug, it can try this connection yet.
Connect to the Bose amplifier via the RCA plugs
PRODUCT FEATURES:
4 Channel Hi/Lo Audio level converter
Converts speaker level audio to line level (RCA) output
Adjustable output level to allow input to suit various amplifiers
Also eliminates signal noise
Maximum input from speaker level: 100 Watts
The noise is even related to the touch screen on my side, touching the screen changes the hiss
Removing the Bose amp and connecting a new amp with just RCA cables has improved the issue, but not eliminated it. My next step is to remove the amplifier chip entirely and see if that makes a difference (As I am only using the low level outputs I do not need the amp chip)
kaise123 said:
Removing the Bose amp and connecting a new amp with just RCA cables has improved the issue, but not eliminated it. My next step is to remove the amplifier chip entirely and see if that makes a difference (As I am only using the low level outputs I do not need the amp chip)
Click to expand...
Click to collapse
Have you tried connecting via normale speaker lines, using a HLA? -> I also have a factory amp and using the RCAs got me ground issues - not present with the normal lines, so I ordered a HLA.
You can lower the output to max -15db in factory settings which I use in the meantime..
Xorit said:
Have you tried connecting via normale speaker lines, using a HLA? -> I also have a factory amp and using the RCAs got me ground issues - not present with the normal lines, so I ordered a HLA.
You can lower the output to max -15db in factory settings which I use in the meantime..
Click to expand...
Click to collapse
Hi, thanks for the answer.
I reduced the decibels to -9dB and noticed that it is much better, but of course the noises are only less audible.
I'm waiting for High quality audio converter to RCA cables, and let you know and let if I have eliminated the noise completely.
DD
dranet said:
Hi, thanks for the answer.
I reduced the decibels to -9dB and noticed that it is much better, but of course the noises are only less audible.
I'm waiting for High quality audio converter to RCA cables, and let you know and let if I have eliminated the noise completely.
DD
Click to expand...
Click to collapse
Should recieve my HLA today and will report back aswell. I have given up on the RCA jacks from the HU though.
I found that the RCA jacks were considerably better than the speaker level outputs as far as both noise and quality go. I was already using the speker level outputs when I initially noticed the issue.
kaise123 said:
I found that the RCA jacks were considerably better than the speaker level outputs as far as both noise and quality go. I was already using the speker level outputs when I initially noticed the issue.
Click to expand...
Click to collapse
I agree. I was able to tune the the "static noise" out of my system using a 3-way electronic crossover/ line driver buy turning down its gain till the noise went away. Lost a bit of volume, but just had to turn the head unit volume up a bit more to make up for it. Not much you can do with speaker level inputs except not to use them and use external amplifiers for all your speakers.
I believe the cause of the noise is an internal isolation problem, not to sure if any isolation can be added to the inside of the unit, When the wifi was on i was getting some bad feedback as well, but i was able to tune that out as well.
Guys, I was able to install the HLA today and beside I cant bring it to clip the sound has improved regarding base.
Turned the gain little up and am now satisfied with the result.
I had a hissing noise from the start even with oem radio and this is gone aswell.
All that using the speaker lines towards oem amp.
Octane70 said:
I agree. I was able to tune the the "static noise" out of my system using a 3-way electronic crossover/ line driver buy turning down its gain till the noise went away. Lost a bit of volume, but just had to turn the head unit volume up a bit more to make up for it. Not much you can do with speaker level inputs except not to use them and use external amplifiers for all your speakers.
I believe the cause of the noise is an internal isolation problem, not to sure if any isolation can be added to the inside of the unit, When the wifi was on i was getting some bad feedback as well, but i was able to tune that out as well.
Click to expand...
Click to collapse
I also believe this is related to the inside of the unit having poor power delivery and bad isolation. Unfortunately the audio is all routed on the main PCB itself so it is not easy to isolate it. I did improve things considerably by soldering directly to the output from the BD37534FV controller and then using this as my RCA output. I did try some further digging but wasn't able to trace the source of the noise back any further.
Next I am going to try adding a capacitor to the power supply, removing the built in TDAXXX amp chip and seeing if I can improve the ground connection on the unit.
Hi.
Finally, I achieved what I wanted more or less, I reduced the number of noises to a minimum, using RCA converters from high to low voltage, adjustable at the expense of the output volume, but I made up for it with the Viper4android module, making listening to music comparable to sitting in a concert hall. Cool effects can be obtained with this module.
That's enough for me, of course, the noise is still present, but it's not as bothersome as before. I do not have the effect anymore that while driving from 100 km / h up, the noise increases and the volume stays constant.
Still, unfortunately, I can not connect anything to the rear USB, because the speakers start to tweet data transmission, similar to the transmission of the modem only faster, I have a USB webcam connected to the front of the radio, unfortunately it is annoying but at least there is no noise.
Of course, to reduce the number of noises in the car completely, I would have to exchange Chinese cheap radio, for which I paid some 300USD for some better, eg from Xtrons radio, they are supposedly better done, but I would have to play with 2DIN frames and it will not be anymore perfectly fit in place of the old radio.
Thanks
DD
This is what I use:
ESX High-To-Low Level Converter ISC4
or
HIFONICS HCV4