Application Notes, Specifications | ASA Electronics MS250 guide

APPLICATION NOTES

This note will discuss DC Power sources and how they relate to 12 volt products.

General Specifications

Our general specification for the voltage range of operation is 10 to

16 volts DC .

Voltage

The voltage of a fully charged battery ( engine not running ) is approximately 12.5 VDC. Once a load (items being powered represent the "load" ) is applied , the voltage will drop. How much the voltage is reduced will depend on the following:

1.Current draw (amount of amperage) The higher the draw the greater the voltage will drop.

2.The size and length of the conductor (wire) supplying power.

Converters

Many boats incorporate convertors as a source for 12VDC when connected to shore power (110-120 VAC).Some converters put out a very

clean DC supply where others may have a				considerable amount of AC
ripple noise under maximum load.
	This	AC ripple noise is filtered	by the	boat battery	when connected
into	the	circuit , but when the battery is		disconnected	the amount of
AC	ripple noise can create major		problems for audio		products. Noise
may	result and the line fuse may fail

Ignition systems

Unwanted noise generated from ignition systems used to be a big problem. However, with more sophisticated filtering circuits designed into audio/video products, these problems are not as wide spread

Changes in wire harnessing also has contributed to the decline of application problems. Use the same ground point for all related products. This will greatly reduce the potential for unwanted noise.

"We have a complete line of audio and video products specifically designed for the Marine and RV market. Please contact ASA at www.asaelectronics.com for a view of our on-line catalog."

AM ANTENNA TRIMMER ADJUSTMENT

The antenna trimmer can be accessed through the small hole behind the cassette door (see diagram below). Tune radio to a weak station between 1200 and 1400 KHz AM ( If you cannot find a weak station in this range, tune to any other strong station, and adjust tuning slightly off station).Adjust trimmer for maximum volume.

FRONT VIEW OF RADIO

ANTENNA TRIMMER (NOTE:

OPEN CASSETTE DOOR TO SEE

THE ADJUSTMENT SCREW)

SPECIFICATIONS

Size:	7''(W) x 2''(H) x 6-5/8''(D) 178mm x 50mm x 150mm
Operating Voltage:	12VDC,Negative Ground
Output Power:	50Watts Max .Stereo Power
Output Wiring:	Floating Ground type designed for 4 speakers use.May
	also be used with 2 speakers.
Output Impedance:	Compatible with 4 or 8 ohm speakers.
Tuning Range:	(AM)530-1710KHz
	(FM)88-108MHz
Sensitivity:	(AM) less than 25uV
	(FM) less than 5uV
FM Stereo Separation: More than 23 dB
Frequency Response:	50-10000Hz
Wow & Flutter:	Less than 0.3%

CARE & MAINTENANCE

Cassette

Always check that the tape is tightly wound inside the take-up spool on the cassette. If the tape is loose,wind it with a six - sided pencil.Never use C-120 (120 minute) cassettes in this player. Never use cassette player when vehicle temperature is near or below freezing.

Cleaning of Tape Head & Capstan

Since tapes contain oxides, you will find a black residue builds up on the tape head and drive capstan ( inside cassette door ). These residues should be cleaned after 50-100 hours of accumulated tape operation .You can use a cassette cleaning cartridge available where ever stereos are sold.

De-Magnetizing

The movement of the magnetic tape head and metal parts cause a magnetic field to develop. We recommend you have the tape player demagnetized at least twice annually. You can purchase an inexpensive tape head demagnetizing tool to do this yourself.

MS250 specifications

The ASA Electronics MS250 is a leading marine audio system designed for boating enthusiasts who value high-quality sound and reliable performance on the water. This innovative product caters to the unique challenges of marine environments, such as humidity, saltwater exposure, and vibrations, making it an ideal choice for both recreational and professional marine applications.

One of the main features of the MS250 is its powerful 250-watt peak output, which ensures that users can enjoy crisp, clear sound even in the noisy setting of a busy marina or while cruising through rough waters. The system includes a ruggedized marine-grade construction, designed to withstand the elements. This durability is complemented by a UV-resistant finish that prevents sun damage, ensuring that the unit maintains its aesthetic appeal over time.

The MS250 also incorporates advanced Bluetooth technology, allowing users to wirelessly connect their smartphones and other devices. This feature enables seamless audio streaming from popular music apps, providing unlimited entertainment options for boaters. In addition to Bluetooth, the MS250 offers multiple connectivity options, including USB and AUX inputs, which ensure compatibility with various audio sources.

Another notable characteristic of the ASA Electronics MS250 is its built-in amplifier, which delivers enhanced audio performance and impressive sound quality across a wide frequency range. The amplifier is engineered to reduce noise and distortion, resulting in a clear listening experience. Moreover, the system features adjustable bass and treble controls, allowing users to customize their audio settings according to their personal preferences and the acoustics of their vessel.

Installation of the MS250 is straightforward, thanks to its compact design and user-friendly interface. The system can be mounted in various locations on a boat, making it a versatile option for different boat styles. The intuitive controls allow users to easily adjust volume and switch tracks, even while navigating.

In conclusion, the ASA Electronics MS250 stands out in the marine audio market due to its powerful performance, Bluetooth connectivity, and robust design. Whether you are relaxing on a leisurely cruise or enjoying a high-energy day of water sports, the MS250 delivers high-quality sound that enhances the overall boating experience. With its combination of technology, durability, and ease of use, the MS250 is a must-have for any serious boating enthusiast.