Murray Design & Manufacturing Corp.
1931 NE 69 St.
Oklahoma City, OK 73111
Phone/Fax 405-478-0502
E-MAIL  info@mdmlocomotiveworks.com

Home NEW STUFF LOCOMOTIVE POWER TRUCK COMPONENTS PRICE LIST DETAILS CONST. PHOTOS CUSTOMER PHOTOS LARGE SCALE INFO LINKS ENGINE SOUNDS

Due to folks wanting the sound files in different formats we have added Windows media audio files and MP3 files

Real Audio files

F7/GP7 STARTING

F9/GP9 STARTING

GP6O STARTING

GP38/GP40 STARTING

F7/GP7 NOTCHING

F9/GP9 NOTCHING

GP60 NOTCHING

GP38/GP40 NOTCHING

Windows Media Audio  files

F7/GP7 STARTING

F9/GP9 STARTING

GP6O STARTING

GP38/GP40 STARTING

F7/GP7 NOTCHING

F9/GP9 NOTCHING

GP60 NOTCHING

GP38/GP40 NOTCHING

MP3 Audio files

F7/GP7 STARTING

F9/GP9 STARTING

GP6O STARTING

GP38/GP40 STARTING

F7/GP7 NOTCHING

F9/GP9 NOTCHING

GP60 NOTCHING

GP38/GP40 NOTCHING

 

The sound samples on the top row demonstrate engine starting, air release, increasing engine RPM, bell, and horn. the bottom row shows how each locomotive sounds when notched up a step at a time. The engine increases to the new power setting then levels out until the engineer notches up again. If the engineer throttles up several notches, the engine RPM will increase to the new setting. Not on these samples is the brake squeal when power is reduced. 

The following is the same information as on the New Stuff Page

We now have a new sound system utilizing a Phoenix Sound Systems "Big Sound " sound board which stores sounds as 16 bit sound samples giving more fidelity and realism. The new sound systems incorporate the following features:

Engine sound specific to particular locomotive:

F7 and GP7s with 1500 HP 567B engines
F9 and GP9s with 1750 HP 567C engines
Medium HP units with 645 engines such as GP38 or GP40s
High horsepower locomotives with turbo chargers like our GP60 locomotive line.
Alco's and GE U-boat engine sounds availably by special request.

Sound system characteristics:

At initial system turn on there is engine start up sound and periodic air releases while locomotive is at idle. Engine sound increases in volume as locomotive is notched up then fades so the gear and turbo charger whine is more prominent when the engine is coasting or slowing ( if turbo-charged version ).  Brake squeal is heard when engine speed is reduced.

Bell and multi chime horns standard with optional single chime available for F units or GP9 locomotives.

Automatic sound system ( as supplied with our powered locomotives) senses motor voltage changes and notches the engine sound up or down as appropriate. Also includes a volume control on the control box.

Manual version is supplied with a hand held control box incorporating the following: potentiometer to increase engine speed, horn button, bell switch, volume control, power switch. Also included are cabling with plug and socket for disconnecting unit from locomotive.

Both models come complete with amplifier, speaker, necessary wiring components, complete instructions, drawings, and construction photos.