Jump to content

Rf Modulator Has Really Low Volume Output..help..

Costas1966

Recommended Posts

Costas1966 Enthusiast

Costas1966

Posted
Posted

Hey guys....after spending about three weeks researching the d**n things, I finally picked up a Scosche FMMOD01 RF Modulator so that I can play my Creative Zen M in my '07 Classic Sierra. I have the in-dash 6-cd changer (Bose) with the steering wheel controls.

 

Problem: After installing the modulator (had to cut the antenna cable and create direct connect splice due to incompatible connectors) I find that the sound is fairly clear from my mp3 player, BUT much lower volume than regular fm or cd.

 

My connections are good (ie no shorts), but I have to turn up my amp volume to 3/4 to get decent sound with the player at 50-75% of max volume (anything over that causes clipping and distortion).

 

Question: Is this a common problem with these modulators? The only other option is line in, but I have no inputs on the back. My buddy (service advisor) faxed me the service schematics for the unit, but I'm not sure where to splice into for my line inputs.

 

I have found a link to this harness from one of wingnut's posts, but is it the only other alternative? The d**n thing costs about $100 with shipping......http://www.jpcustoms.com/store/customer/product.php?productid=16391&cat=306&page=1

 

 

Your experienced suggestions are welcomed. Thanks.

lerbud Enthusiast

lerbud

Posted
Posted

Get a PAC adapter. I had one of these on my truck to run the volume for my dvd player:

PAC AAIGM12

Costas1966 Enthusiast

Costas1966

Posted
  • Author
Posted
Get a PAC adapter. I had one of these on my truck to run the volume for my dvd player:

PAC AAIGM12

 

Thanks for your reply.....the only problem is that my unitn HAS the XM radio built-in, and the 6-CD changer built in as well.....the info I found indicates that it won't work. At least that's how I'm reading it......

Wingnut Senior Enthusiast

Wingnut

Posted
Posted

Sorry you're not getting much help...Most folks don't do much with the modulators these days.

 

I used one a few years back, and it was so horrible (soundwise), I ripped it out in less than a week.

ZR Rider Enthusiast

ZR Rider

Posted
Posted

I use a USA Spec unit, the radio thinks it has a remote CD player as well as the indash 6.

I have plugged mine into the XM side as it has better bass then the cd changer side. Maybe look into that unit. And it will work with XM.

http://www.oemautosound.com/pm-239-11-chev...ce-pa11-gm.aspx

http://www.usaspec.com/ipod.html

Your right on the money with the RF... they lose sound quality and volume! Mine sounds crystal clear and has no hissing and higher volume.

  • 2 weeks later...
Costas1966 Enthusiast

Costas1966

Posted
  • Author
Posted

Just reporting back, guys.....I tried the scoche modulator, and I was impressed with the quality.....but the volume was very low, and when I maxed out my mp3 player volume, the sound was badly distorted. I ripped it out, and tried a Belkin Tunecast II FM Transmitter from Walmart for $30. Very good volume level, and very good quality sound......I would recommend it so far.....!!

 

I just thought I'd share some results, guys!

ZR Rider Enthusiast

ZR Rider

Posted
Posted

That's the one I started off with, then went to the iTrip. They work fine as long as there are no local radio stations close to the one your lock on. The problem I had was around town it was fine, then go into the city and it would fade in and out.

What kind of MP3 player are you running? Maybe add a RCA input instead? You can get one of the 1/8 jack split to RCA and run it direct.

Costas1966 Enthusiast

Costas1966

Posted
  • Author
Posted

ZR.....the thing I like about this unit is that you can change the frequency through the entire spectrum.....I haven't had any problems around town with it. I'm using a Creative Vision M unit.....the 1/8 jack plugs straight into it.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • PhilB
      No 12v outlets in 2026 gmc Sierra

      By PhilB · Posted

      It is possible to add your own 12v outlet to your truck.  Check out this video:   I verified via GM Upfitters that pin 31 is the same on the 1500 trucks.  The wire is GM part number 84779405.   You can get the GM 12v outlet from Amazon  https://www.amazon.com/Genuine-Accessory-Receptacle-25774623-13549530/dp/B0F1H9YRGF EWAY 12 Volt Power Adapter for GM   https://www.amazon.com/EWAY-Chevrolet-Silverado-Cigarette-Ignition/dp/B0915RRW6Q/ref=sr_1_1?   I just haven't figured out a good place to put the 12v outlet in my truck.   Some people are getting USB-C to 12V adapters  https://www.amazon.com/WYMECT-Cigarette-Lighter-Socket-Adapter/dp/B0F87WNQKB/ref=sr_1_1_sspa? Not sure if they provide the correct amperage that a device like a tire inflator would need.  
    • Core-Lokt
      Wiring Help, Please

      By Core-Lokt · Posted

      Thanks; I looked there a few minutes, and I think I can find something. I really never looked there, as I thought it was stuff like PTO/aftermarket bodies/accessories like snow plows.
    • newdude
      2 speed transfer case optional now?

      By newdude · Posted

      This is a 1/2 ton thing ONLY.  All HDs 2020-2026 have the two speed transfer case, with Autotrac as an option.     1/2 tons 2019-2026, regular 4x4s come with a single speed case (no 4LO!), and trucks with Z71 ordered, or all Trail Boss trucks come with the 2 speed case.  2 speed case is also an option on WT, and is also standard on High Country.  
    • newdude
      Different requirements for oil filters?

      By newdude · Posted

      2013 5.3 still to this day calls for the PF48 filter.  Which as a 15psi bypass pressure.     There is a TSB, 17-NA-157 that talks about the PF-63 and PF-64 filters which have a higher bypass rating of 22psi.    TSB HERE - temp.xml   "Beginning in 2012, the oil pumps began to regulate main gallery feedback instead of pump out pressure. This means that the oil pump now does not begin to regulate until pressure is built up to the main gallery. This change reduces the amount of time it takes to provide oil to the engine bearing and lifters during extreme cold start conditions.  Main gallery feedback oil pump control systems are present on the following engine families which use Spin-on oil filters: Small Gas Engine (SGE), Large Gas Engine (LGE), High Feature (HFV6) Gen2 and Small Block Gen5 gasoline engines. These engines with the main gallery feedback oil pump control systems are factory built with an ACDelco® oil filters"   It also calls out what engines use those filters.  The gen 4 small blocks were not on that list (LMG, LC9, L9H, L92, L94, L20, L96).  Gen 5 small blocks use the higher pressure filter.          That all said...   Your 7045 Napa filter is the PF63 equivalent, with 22psi bypass.  You are already using the higher bypass pressure filter.  You CAN keep using it, you don't technically have to use it though.  
    • Grumpy Bear
      Different requirements for oil filters?

      By Grumpy Bear · Posted

      Do you know WHY the filter relief setting was increased to 22 psig?    When the new system goes into the second stage the pump volume ramps up considerably. It was found that the 15 psi filter bypass setting put the filter in bypass on a warm engine when the second stage was activated. Raising the filter bypass setting forced the filter to do what it designed to do. Filter. Preventing debris from circulating during high load, high rpm operation.    So next question is how did GM find this out? VLOM/lifter failures and a deep dive by Melling Corp.    Last question. Is it required? Look at it like this; a motor may be equipped with a rev limiter. But it only works if the set point in reached. That 22 psig setting only matters if the pressure differential across the filter media exceeds 15 psig during normal warm operation. Second stage kicks in around 3000-3500 rpm.    I can't answer your question because I don't know you and how you use the truck. But I think there is enough information here to let you decide for yourself. 😉

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...