7/19/22 (Update) Issue Resolved MTH Replacement Speakers STAR NR-05009-01 16 5W 234 E or Alternate

Unfortunately 16 ohm, 50mm diameter speakers aren't available from MTH, the closest match I could find anywhere was here on ebay, but you have to find someone to solder the original wiring and connector to the new speaker.

https://www.ebay.com/itm/31301...3:g:ryMAAOSwfSheWFV4

The seller seems to know what they're talking about, but no guarantee it will fit or work for your engine.

Hopefully someone else on the forum posts a better solution.

Also, I assume when you say "Present speaker (picture below) is crackling-staticky very little sound when turned up to high sound."  you mean you turned up the volume with the manual control ? ( square blue potentiometer on the bottom of the engine, underneath a power truck, but near the speaker )  page 5 of manual below.

https://mthtrains.com/sites/de...ction/30dl17143i.pdf

I’ve installed about 50 of those speakers.  They don’t have the wattage rating of the original, but they work, but sound a little tinny.  There aren’t many alternatives.

@JET posted:

Also, I assume when you say "Present speaker (picture below) is crackling-staticky very little sound when turned up to high sound."  you mean you turned up the volume with the manual control ? ( square blue potentiometer on the bottom of the engine, underneath a power truck, but near the speaker )  page 5 of manual below.

https://mthtrains.com/sites/de...ction/30dl17143i.pdf

Thank you for your reply and the manual.

Yes I was talking about the ( square blue potentiometer on the bottom of the engine, underneath a power truck, but near the speaker )

Steve

@Jon G posted:

I’ve installed about 50 of those speakers.  They don’t have the wattage rating of the original, but they work, but sound a little tinny.  There aren’t many alternatives.

Jon G: Would this speaker from Amazon (below) work?

Found in a 2015 Forum search:

Florida Nativefl  Living in Florida with the high humidity I find the paper speakers to fail far to often.......  here is a good replacement for the 2 inch size common to many MTH engines,  not all unfortunately as it works very well. O Gauge Forum Thread https://ogrforum.com/...-speaker-replacement

MTH 5v PS2.0 speaker replacement 

Per the iOhms at this size and wattage output does not matter at all.........  

Polypropylene (plastic) design has held up much longer than the paper,  been using these for 3 years now.  No more failures....

Amazon link,  buy them in volume and they are pretty cheap,  less than $4 each:  http://www.amazon.com/dp/B00IK...oliid=I13ZJ3N9TPZHU8  or copy n paste https://www.amazon.com/dp/B00I...oliid=I13ZJ3N9TPZHU8

Thanks for your time and consideration.

Steve W

Jon G: Would this speaker from Amazon (below) work?

I haven't tried that version, but other 4 ohm polypropylene speakers sounded bad, so I stopped using them.

I went to an electronics search engine and found some quality German speakers:  16 ohm, 50mm, 1 watt nominal ( 2 watt max )

https://octopart.com/k+50+fl+-...isaton-89142496?r=sp

The frequency response ( download data sheet ) is pretty flat from 500 Hz to 5000 Hz so it should sound good in the diesel rumble - horn frequency range, it might sound a bit bright / harsh for steam hiss. The only disadvantage is it has solder pads instead of the loop terminals the other speakers have.

@Jon G posted:

Jon G: Would this speaker from Amazon (below) work?

I haven't tried that version, but other 4 ohm polypropylene speakers sounded bad, so I stopped using them.

Thank you for your fast reply.  I appreciate your comments.

Steve W

@JET posted:

I went to an electronics search engine and found some quality German speakers:  16 ohm, 50mm, 1 watt nominal ( 2 watt max )

https://octopart.com/k+50+fl+-...isaton-89142496?r=sp

The frequency response ( download data sheet ) is pretty flat from 500 Hz to 5000 Hz so it should sound good in the diesel rumble - horn frequency range, it might sound a bit bright / harsh for steam hiss. The only disadvantage is it has solder pads instead of the loop terminals the other speakers have.

Wow! Thank you for taking the time to locate an alternate speaker.

Steve W.

You're welcome!  It helps everyone to know what speakers MTH no longer has and what else is available, since as Jon G says they do go bad. ( I ordered one just to do a comparison with what's in my PS2 5V GP-9)

What is the actual part number for this speaker?  Lots of speakers on their website.

@RON ARNDT 091718 posted:

What is the actual part number for this speaker?  Lots of speakers on their website.

Visaton  K 50 FL - 16 ohm

For anybody interested, I compared the Visaton K 50 FL ( mounted in a spare f40PH fuel tank ) with the stock 5V Proto 2 speaker,  ( 2W 16 ohm Star PR-050-A1111 )  in my  GP-9   https://mthtrains.com/part/bf-0000007  and it had equal or better sound quality, definitely a good replacement.

Good Afternoon Everyone,

I apologize for my late reply . A friend in our Farmington Train club recently replaced my damaged horn with the Visaton  K 50 FL - 16 ohm (https://octopart.com/k+50+fl+-...isaton-89142496?r=sp) that was recommended by JET. My friend and I agree it is a better sounding horn than the original.

Again, I thank each of you for your replies and apologize for the delay in getting back to you. I am busier in retirement than when I was working.

Thank you all for your time, energy and hard work.

Sincerely,

Steven Widmer

To: Alan Marcus

I no longer need this part issue is resolved.

Thank you for your reply.

Steven Widmer

FWIW, I've been using the Visaton K50 8-ohm speakers for years for TMCC speaker replacements.