MRC Sound System | AZL Forum

boxcarwilly
Conductor

Posts: 404

MRC Sound System Sept 21, 2013 15:42:11 GMT -5

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Post by boxcarwilly on Sept 21, 2013 15:42:11 GMT -5

I have a question about the MRC-AA555 Symphony 77 Sound System for anyone who might have one of these gizmos.

Is there any way to increase the sound output on this device?

The problem I have with this thing is this: It works just perfectly in my basement when there is myself, son and grandson running the trains. But when I take my layout to a show and try to use this device, it can't be heard over the din at the show. Even on full volume the only way to actually hear it is to put your ear right next to one of the speakers. Now I know these just have computer style speakers and are not designed to put out a lot of volume, but there must be a way to boost the level substantially. I considered hooking it to an external set of speakers like in my surround sound, but there is no way to attach them without tearing apart one of the speakers and without an additional amplifier of some kind, this idea wouldn't fly anyway.

If anyone has the same problem or if anyone has any ideas on how I can get a higher level of sound out of it, please let me know.

Thanks

BAZman
Superintendent

Z plus . . .

Posts: 950

MRC Sound System Sept 23, 2013 14:11:40 GMT -5

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Post by BAZman on Sept 23, 2013 14:11:40 GMT -5

Not without an external amplifier. The internals are near identical to a in-train sound decoder, using a digital amplifier. There will be no 'analog' tap point within the circuitry but you can tap on to the two speaker wires (you MUST leave the speaker in the circuit, that is how it 'technically' can make the audio sound from the very high frequency [very inaudible frequency]). Solder two wires on these 2 speaker connections to a 3.5 mm jack so that you can plug a small amp like this into it.
tinyurl.com/n8x6cjk

Note: the jack must be a 3 circuit 'stereo' with the 'tip and ring' contacts tied together, to one speaker lead and the 'sleave' contact tied to the other speaker lead. It doesn't matter which speaker lead as the amplifier is 'bi-polar' in design.

Jeff
SF Bay Area Z
a.k.a. 'The BAZ BoyZ'

boxcarwilly
Conductor

Posts: 404

MRC Sound System Sept 23, 2013 19:14:49 GMT -5

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Post by boxcarwilly on Sept 23, 2013 19:14:49 GMT -5

Thank Jeff:

Would a stereo surround sound system work for this? I have one that was given to me well over 5 years ago and I haven't used it in at least 3. I thought that might be the idea thing to use since it has the sub woofer and 4 other speakers.