Mind the gap Posted December 29, 2017 Share Posted December 29, 2017 Hi i have just fitted a class 43/hst tts decoder into my dcc ready hornby HST, the spot sounds ie horns, door slam, guards whistle all sound fine. The engine start up sounds fine but after that the engine sounds sound distorted And very faint across all speed settings? i am discounted an issue with the speaker as the spot sounds seem to be ok, but any ideas on what might be the issue ?thankyou,Mind the gap Link to comment Share on other sites More sharing options...
WilliamDavid Posted December 29, 2017 Share Posted December 29, 2017 I found a similar thing with my TTS Tornado.Spot sounds seemed fine, but the chuffing noises were distorted. New speaker fixed it. Link to comment Share on other sites More sharing options...
morairamike Posted December 29, 2017 Share Posted December 29, 2017 My TTS Malard did the same, e-mailed Hornby and they sent a replacement speaker. I also proved it was the speaker by substituting another 8 ohm one. Now use sugar cubes with my three self fit TTS decoders. Link to comment Share on other sites More sharing options...
Chrissaf Posted December 29, 2017 Share Posted December 29, 2017 Mind the gap,It seems nearly every other TTS post on this forum relates to an issue with the speaker supplied with the TTS, ranging from selective distortion / crackle of some but not all sounds to being faint to being completely dead. Regardless of your assessment that the speaker is OK (just because the spot sounds are fine) I really would pay credence to the replies made by WD & MM and treat the speaker as suspect. Link to comment Share on other sites More sharing options...
96RAF Posted December 30, 2017 Share Posted December 30, 2017 Certainly the default speaker is #1 suspect but remember TTS is twin channel sound with running noise on one channel and spot sounds on the other channel, so it is possible for channel 1 of the amplifier to go belly up whilst channel 2 is clear.There is also the frequency response of the amplifier to consider as it could be a high volume is driving the amp into saturation and distortion. No doubt one of our audiophiles can/will prove/disprove this guess.Rob Link to comment Share on other sites More sharing options...
Mind the gap Posted December 30, 2017 Author Share Posted December 30, 2017 Thankyou all for the replies above.i have replaced the factory fitted speaker today with a spare that I happened to have and all sounds seem to be ok.unfortuanly The spare is just too big to fit in the hst, 1 inch cube, and I would welcome thoug thoughts of the forum members on a suitable speaker that would fit in the hst power car? thanks again,Mind the Gap. Link to comment Share on other sites More sharing options...
Chrissaf Posted December 30, 2017 Share Posted December 30, 2017 See "Howbiman's" reply - second post up from the bottom in this previous TTS speaker topic thread..https://www.hornby.com/uk-en/forum/tornado-tts-intermittent-sound/?p=1/#post-228285.PS - TTS Speakers are 8 ohms rated at 1W.....do not replace with a 4 ohm one..Extract from TTS installation guide:/media/tinymce_upload/ca1bb0d544709e8606fe369c574503e3.jpg Link to comment Share on other sites More sharing options...
Mind the gap Posted December 30, 2017 Author Share Posted December 30, 2017 Thanks Chris, Smaller speaker now ordered. Thankyou. Link to comment Share on other sites More sharing options...
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