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KB994 Decible measurements on SDH164D

               Decibel measurements on SDH164D Digitrax Sound     Sound level is a logarithmic measure of the effective sound pressure of a sound relative to a reference value. It is measured in decibels (dB) above a standard reference level. The commonly used "zero" reference sound pressure in air is 20 µPa RMS, which is usually considered the threshold of human hearing (at 1 kHz).   Examples of some Loudness rating in both Pa and dB           Hearing damage (over long-term exposure, need not be continuous)                      0.356 Pa                   85 dB Handheld electric mixer                                                                                                                                  65 dB TV (set at home level) at ...

KB995 SDH164D with 2 28mm 32 ohm speakers

SDH164D SoundFX Wired Mobile Decoder for HO Locomotives Speaker:   Two 28mm dia. 32 Ohm, 0.5 W These speakers are connected in parallel. Master Volume  CV58= 9  to 15,   Diesel CV60 = 1, Bell CV141= 64 Max.,   Horn CV142=  64 Max.            Diesel Horn         880Tone Sine Wav.     Horn & 880 Hz together   Factor     dB@4' CV58 MtoP   dB@4' CV58 MtoP   dB@4' CV58 MtoP   x 0.71     68 15  4.15   66 15  4.25   70 15 4.25   3.00 Vrms   67 12  4.10   65 12  4.20   Each ...

KB998 SDH164 with two SP26158B Rectangular Speakers

Sound Decoder:  SDH164D SoundFX Wired Mobile Decoder for HO Locomotives Master Volume: CV58=9 to 15, Diesel CV60=1, Bell CV141=64 Max., Horn CV142=64 Max.   Speaker: Two SP26158B Rectangular 26.5mm x 15.5mm x 9mm, 8 Ohms 0.5W Compact Box, Speaker with enclosure & wires.  Speakers are wired in series.              Diesel Horn         880Tone Sine Wav.     Horn & 880 Hz together   Factor     dB@4' CV58 MtoP   dB@4' CV58 MtoP   dB@4' CV58 MtoP   x 0.71     67 15  4.20   66 15  4.30   67 15 4.30   3.05 Vrms   ...

KB999 SDH164 with one SP26158B Rectangular Speaker and One SP53188B

Sound Decoder:  SDH164D SoundFX Wired Mobile Decoder for HO Locomotives   Master Volume: CV58= 9 to 15, Diesel CV60=1, Bell CV141=64 Max., Horn CV142=64Max. Speaker: One SP26158B Rectangualr 26.5mm x 15.5mm x 9mm, 8 Ohms 0.5W One SP53188B 53mm X 18mm X14mm, 8 Ohms 0.5W Speakers are wired in series.              Diesel Horn         880Tone Sine Wav.     Horn & 880 Hz together   Factor     dB@4' CV58 MtoP   dB@4' CV58 MtoP   dB@4' CV58 MtoP   x 0.71     69 15  4.15   65 15  4.30   69 15 4.30   3.05 ...

KB716 Speaker Mounting, Baffles & Enclosures For Better Sound Performance

The sound performance of any speaker is greatly affected by where and how the speaker is mounted and whether an adequate speaker enclosure or baffle is installed.The baffle is used to isolate to speaker diaphragm's front side sound waves from the out of phase rear sound waves. This minimizes sound cancellation, particularly at lower frequencies. For most efficient sound generation, the volume of the baffle should be as large as practically possible. The baffle walls should be acoustically rigid to prevent acoustic interference.Practical materials to use for the baffle are plastic, cardboard and sheetmetal. Common items such as cardboard tubes ...

KB258 DH165L0 - Soundbug Installation

Installation of the SFX004 SoundBug into a DH165-Series decoder is easy, but it does require some care. The SoundBug must be properly oriented to the decoder. Here, the DH165L0: Here, an installation in a Proto1000 DL-109. In this orientation, the SoundBug sockets are to the right on the DH165L0 decoder: The SoundBug is plugged into the sockets of the DH165L0 decoder: Because the DL-109 is a diesel locomotive, it will not need the white synchronization wire. Everything is fitted into place. The SoundBug is shipped with a small piece of foam to protect the pins of this decoder. You may ...

KB1003 SDH164D with Two SP53188B Speakers

Sound Decoder:   SDH164D SoundFX Wired Mobile Decoder for HO Locomotives   Speaker:Two SP53188B 53mm x 18mm x 14mm 8 Ohms 0.5W  Rectangular Box These two 8 ohms are wired in series.   Master Volume: CV58= 9 to 15,   Diesel CV60 = 1, Bell CV141= 64 Max.,   Horn CV142= 64 Max.                Diesel Horn         880Tone Sine Wav.     Horn & 880 Hz together   Factor     dB@4' CV58 MtoP   dB@4' CV58 MtoP   dB@4' CV58 MtoP   x 0.71     71 15  4.15   67 15  4.30   71 15 4.30   ...

KB1004 SDH164D with One 28 mm 32 ohm speaker in an Enclosure

Sound Decoder:  SDH164D SoundFX Wired Mobile Decoder for HO Locomotives Master Volume CV58= 9 to 15, Diesel CV60=1, Bell CV141=64, Horn Cv142=64 Max. Speaker:  One 28mm dia. 32 Ohm 0.5W Speaker is enclosed, and is hanging by the wires.              Diesel Horn         880Tone Sine Wav.     Horn & 880 Hz together   Factor     dB@4' CV58 MtoP   dB@4' CV58 MtoP   dB@4' CV58 MtoP   x 0.71     69 15  4.55   67 15  4.60   70 15 4.75   3.35 Vrms   67 12  4.35   65 12  4.55    The ...

KB1005 SDH164D with One 28 mm 32 ohm speaker

Sound Decoder   SDH164D SoundFX Wired Mobile Decoder for HO Locomotives   Master Volume CV58= 9  to 15,   Diesel CV60 = 1, Bell CV141= 64 Max.,   Horn CV142=  64 Max.   Speaker:   One 28mm dia. 32 Ohm, 0.5 W Not enclosed, and is hanging by the wires.                Diesel Horn         880Tone Sine Wav.     Horn & 880 Hz together   Factor     dB@4' CV58 MtoP   dB@4' CV58 MtoP   dB@4' CV58 MtoP   x 0.71     66 15  4.55   64 15  4.60   67 15 4.75   3.35 Vrms   64 ...

KB1006 SDH164D with one 4 inch 8 Ohm speaker with 3.3 Ohm resistor

  Sound Decoder:  SDH164D SoundFX Wired Mobile Decoder fopr HO Locomotives Master Volume: CV58=9 to 15, Diesel CV60=1, Bell CV141=64Max., Horn CV142=64 Max. Speaker: 4 inch Dia. 8 Ohm Speaker, 4 Watts with a 3.3 Ohm resistor in series.              Diesel Horn         880Tone Sine Wav.     Horn & 880 Hz together   Factor     dB@4' CV58 MtoP   dB@4' CV58 MtoP   dB@4' CV58 MtoP   x 0.71     79 15  3.85   74 15  4.00   79 15 4.00   2.84 Vrms   78 12  3.80   73 12  3.95   Amplifier ...

KB301 Speaker Mounting

Speaker Mounting and baffle/enclosures. The sound performance of any attached speaker(s) is greatly affected by the mounting system and required baffle or rear enclosure. The baffle is used to isolate to speaker diaphragm front sound waves from the out of phase rear sound waves. This minimizes sound cancellation, particularly at lower frequencies. For most efficient sound generation, the volume of the baffle should be as large as practically possible, and the baffle walls should be acoustically rigid so not to allow acoustic interference. Practical baffle materials are plastic, cardboard and even sheet metal. Common items such as cardboard tubes or ...

KB1008 SDH164D with One SP26158B Rectangular Speaker and a 5 ohm resistor

Sound Decoder:  SDH164D SoundFX Wired Mobile Decoder for HO Locomotives Maste Volume: CV58=9 to 15, Diesel CV60=1, Bell CV141=64 Max., Horn CV142=64 Max. Speaker:  one SP26158B Rectangular 26.5mm X 15.5mm x 9mm, 8 Ohms 0.5W Compact Box, Speaker with enclosure & wires. A 5 Ohm 1/2W resistor in series with the speaker.              Diesel Horn         880Tone Sine Wav.     Horn & 880 Hz together   Factor     dB@4' CV58 MtoP   dB@4' CV58 MtoP   dB@4' CV58 MtoP   x 0.71     68 15  4.00   65 15  4.10   68 15 4.10 ...

KB1009 SDH164D with one Small-Oval 8 Ohm speaker and 3 resistors

Sound Decoder:  SDH164D SoundFx Wired Mobile Decoder for HO Locomotives Master Volume: CV58=9 to 15, Diesel CV60=1, Bell CV141=64 Max., Horn CV142=64 Max. Speaker: Small-Oval 8 Ohm, 1 Watt with a 3.3 Ohm resistor in series. 35mm x 16.2mm or 36.9mm x 18.3mm w/enclosure 8.1mm High or 9.1mm w/enclosure Tonystrains see dreamspeakers              Diesel Horn         880Tone Sine Wav.     Horn & 880 Hz together   Factor     dB@4' CV58 MtoP   dB@4' CV58 MtoP   dB@4' CV58 MtoP   x 0.71     67 15  4.00   65 15  4.15   67 15 4.15   ...

KB340 SDH164D with One SP26158B Rectangular Speaker and a 5 ohm resistor compact box enclosure.

Sound Decoder:  SDH164D SoundFX Wired Mobile Decoder for HO Locomotives Master Volume: CV58=9 to 15, Diesel CV60=1, Bell CV141=64 Max., Horn CV142=64 Max. Speaker: one SP26158B Rectangular 26.5mm x 15.5mm x 9mm, 8Ohms 0.5W Compact Box Speaker with enclsure & wires A 5 Ohm 1/2W resistor in series with the speaker.              Diesel Horn         880Tone Sine Wav.     Horn & 880 Hz together   Factor     dB@4' CV58 MtoP   dB@4' CV58 MtoP   dB@4' CV58 MtoP   x 0.71     67 15  4.00   65 15  4.15   67 15 4.15   ...

KB541 32 Ohm speakers with the SDH104K1B+FN04K1 combo

Q: I'm using the SDH104K1B+FN04K1 in a custom installation. The supplied speaker is a bit too large, and I'm having difficulty sourcing appropriate-size 32 Ohm speakers. I can, however, find 4 Ohm and 8 Ohm speakers that fit my needs. A: No, you should use 32 Ohm speakers with decoders that specify 32 Ohm speakers for the best performance. Check with your dealer to find 32 Ohm speakers that are available from Digitrax. If you decide to use 8 ohm or 16 ohm speakers with the SDH104K1B, you will need to adjust the speaker volume downward to reduce distortion that ...