Advertisement
Quick Links
CONTENTS
(click on a topic to view)
Congratulations
Features & Specifications
Installation
Wiring
Power / Ground
Connections
Connections
Inputs & Connections
Inputs
Endpanel Layout
Endpanel Layout
Troubleshooting
Troubleshooting
Troubleshooting
Troubleshooting
System Diagrams
Block diagram
Warranty
Advertisement
Related Manuals for Precision Power MA1250
Summary of Contents for Precision Power MA1250
- Page 1 CONTENTS (click on a topic to view) Congratulations Endpanel Layout Features & Specifications Endpanel Layout Installation Troubleshooting Wiring Troubleshooting Power / Ground Troubleshooting Connections Troubleshooting Connections System Diagrams Inputs & Connections Block diagram Inputs Warranty...
- Page 2 Thank you for choosing TUBE DRIVER. Tube Drivers musicality and absolute sonic transparency allow accurate reproduction of recorded music enabling you to hear as well as feel the music the way the artist intended. These handcrafted amplifiers feature full differential “front ends” based upon a true instrumentation amplifier topology.
- Page 3 2 - 16 Ohms C o n t i n u o u s O u t p u t P o w e r MA1250 250 WRMS x 1 @ 4 Ohms 500 WRMS x 1 @ 2 Ohms...
- Page 4 F u s e R e q u i r e m e n t s R e c o m m e n d e d F u s e R a t i n g for MA1250 is 100 A m p s You will need to install an in-line fuse or circuit breaker in the power wire within 18”...
- Page 5 Tube Driver will turn itself down to protect itself. M o u n t i n g You need to mount your MA1250 securely in your vehicle to prevent damage. You may mount the system right-side up, on its side, or upside-down, provided there is adequate ventilation.
- Page 6 You must connect a wire to the remote (REM) terminal (located in the speaker terminal plug) of your amplifier to power on your MA1250 . The source unit normally provides a remote amp turn-on or power antenna lead that provides this +12 volts when you turn on the unit.
- Page 7 S p e a k e r C o n n e c t i o n s Follow these simple instructions and refer to the diagram below to make your speaker connections: • Using at least 16 gauge wire, run wire from the speakers to the amplifier(s) using the same precautions that you followed for running the power, ground, and remote wires •...
- Page 8 All multi-channel T UBE DRIVERS are capable of being bridged into a 4-Ohm mono output without switches or bridging modules. Your new MA1250 is a mono (single channel) amplifier. It cannot be bridged. The two pairs of speaker terminals are in parallel, so connecting two 4 ohm woofers (one on each pair of terminals) would result in a 2 ohm load to the amplifier.
- Page 9 I n p u t J a c k s The MA1250 includes both RCA and Mini-Din (balanced) inputs. The supplied RCA connections allow you to use the MA1250 with other brands of audio gear. Our Differential RCA inputs provide a dramatic improvement in noise reduction over standard RCA input types.
- Page 10 TUBE DRIVER LD-3) makes the music much louder. By turning the level control counterclockwise (to the left), the amp inputs will be less sensitive. The amp will reproduce music at full power while making any noise floor insignificant. Your MA1250 accepts signal levels of up to 12 volts RMS.
-
Page 11: Power / Ground
P o w e r S i d e 1. POWER A red light indicates that the amplifiier is turned on (After warm-up sequence). 2. WARM UP A red light indicated that the tubes are warming up. (Refer to Pg. 4; Remote Turn-on) 3. - Page 12 I n p u t / C o n t r o l S i d e 1. SPEAKER OUTPUTS / REMOTE (Turn-on) After connecting remote and speaker wires plug in the connector here. 2. GAIN Use this control to match the output level of the head unit to the outputs of the amplifier. 3.
- Page 13 N o S o u n d WARM Do you have 12V at the amplifier’s The warm up cycle can take up to connections? 40 sec., Is there sound after that? Does the amp Check all You’re done Is there remote (REM) connections.
- Page 14 N o S o u n d i n O n e C h a n n e l Check the pre-amp (RCA/Mini-Din) cables for open connections and make corrections. Did you find open connections? Reverse the left and right inputs. You’re done SOUND IS NOW IN...
- Page 15 N o i s e s W h i l e t h e E n g i n e i s O n A l t e r n a t o r w h i n e : This noise changes in frequency with engine RPM.
- Page 16 N o i s e s W h i l e t h e E n g i n e i s O n o r O f f S y s t e m h i s s : System hiss is a white noise that occurs even when the engine is off.
- Page 17 BACK TO CONTENTS...
- Page 18 BACK TO CONTENTS...
- Page 19 Three-Year Limited U.S.A. Warranty This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. TUBE DRIVER warrants its products to be free from defects in materials and workmanship under normal use and service for a period of three (3) years from the date of original purchase when the unit is installed by an Authorized Dealer.
Need help?
Do you have a question about the MA1250 and is the answer not in the manual?
Questions and answers