Headphone Amp Distributor

 

Model PH-50

Owner's Manual

Thank you for purchasing our Fostex product.

The model PH-50 is a headphone distributor. It has three inputs and five high power (500mW) headphone outputs whose output level can be separately controlled. In addition, it contains a matrix box function for five inputs and five outputs.

For inputs to the headphone distributor, it has two balanced lines and one unbalanced line. The balanced input level can be switched for receiving +4dBu or -10dBV levels. Also, the CUE box function can be employed by using the AUX inputs, and the multi-channel operation by cascade connection of a multiple number of PH-50's. Please carefully read through this manual for many years of good service.

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,

DO NOT REMOVE COVER (OR BACK).

NO USER - SERVICEABLE PARTS INSIDE.

REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

CAUTION:

TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF PLUG TO WIDE SLOT, FULLY INSERT.

ATTENTION:

POUR EVITER LES CHOCS ELECTRIQUES, INTRODUIRE LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE CORRESPONDANTE DE LA PRISE ET POUSSER JUSQU' AU FOND.

The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.

"WARNING"

"TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,

DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE."

The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.

SAFETY INSTRUCTIONS

1.Read Instructions - All the safety and operating instructions should be read before the appliance is operated.

2.Retain Instructions - The safety and operating instructions should be retained for future reference.

3.Heed Warnings - All warnings on the appliance and in the operating instructions should be adhered to.

4.Follow Instructions - All operating and use instructions should be followed.

5.Water and Moisture - The appliance should not be used near water - for example, near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, and the like.

6.Carts and Stands - The appliance should be used only with a cart or stand that is recommended by the manufacturer.

An appliance and cart combination should be moved with care. Quick stops, excessive force, and uneven surfaces may cause the appliance and cart combination to overturn.

7.Wall or Ceiling Mounting - The appliance should be mounted to a wall or ceiling only as recommended by the manufacturer.

8.Ventilation - The appliance should be situated so that its location or position dose not interfere with its proper ventilation. For example, the appliance should not be situated on a bed, sofa, rug, or similar surface that may block the ventilation openings; or, placed in a built-in installation, such as a bookcase or cabinet that may impede the flow of air through the ventilation openings.

9.Heat - The appliance should be situated away from heat sources such as radiators, heat registers, stoves, or other appliances (including amplifiers) that produce heat.

10.Power Sources - The appliance should be connected to a power supply only of the type described in the operating instructions or as marked on the appliance.

11.Grounding or Polarization - The precautions that should be taken so that the grounding or polarization means of an appliance is not defeated.

12.Power Cord Protection - Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit from the appliance.

13.Cleaning - The appliance should be cleaned only as recommended by the manufacturer.

14.Nonuse Periods - The power cord of the appliance should be unplugged from the outlet when left unused for a long period of time.

15.Object and Liquid Entry - Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings.

16.Damage Requiring Service - The appliance should be serviced by qualified service personnel when:

A.The power supply cord or the plug has been damaged; or

B.Objects have fallen, or liquid has been spilled into the appliance; or

C.The appliance has been exposed to rain; or

D.The appliance does not appear to operate normally or exhibits a marked change in performance; or

E.The appliance has been dropped, or the enclosure damaged.

17.Servicing - The user should not attempt to service the appliance beyond that described in the operating instructions. All other servicing should be referred to qualified service personnel.

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Fostex user service Model PH-50
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PH-50 specifications

The Fostex PH-50 is a premium headphone amplifier designed for audiophiles and professionals who demand the highest audio fidelity. Renowned for its impressive specifications and outstanding performance, the PH-50 has become a popular choice for music enthusiasts and recording engineers alike.

One of the key features of the Fostex PH-50 is its fully balanced architecture. This design minimizes noise and distortion, delivering a pure audio signal that maintains the integrity of the original recording. By utilizing both balanced and unbalanced inputs, the PH-50 can seamlessly integrate into a variety of audio setups, from home studios to portable systems.

The PH-50 also boasts an array of connectivity options, including RCA inputs and a ΒΌ-inch headphone output, ensuring compatibility with most audio sources. With a dedicated gain switch, users can easily adjust the output level to match their specific headphones, whether they are low-impedance models or high-impedance studio headphones. This versatility makes the Fostex PH-50 an invaluable tool for different listening scenarios.

Another notable characteristic of the PH-50 is its robust build quality. The amplifier features a sturdy metal chassis that not only enhances durability but also reduces interference from external electromagnetic sources. This ensures that users receive a clean and uncolored audio signal during their listening sessions.

In terms of technological advancements, the PH-50 incorporates high-grade components, such as premium capacitors and resistors, which contribute to its excellent dynamic range and clarity. The low-noise circuitry design further aids in minimizing background noise, providing a focused listening experience.

Additionally, the Fostex PH-50 features a user-friendly interface, complete with a large volume knob and easily accessible controls. This design allows users to fine-tune their listening experience without any hassle, enhancing the overall usability of the device.

Overall, the Fostex PH-50 headphone amplifier combines advanced technology, versatile connectivity, and durable construction to deliver an exceptional audio experience. Whether for casual listening or critical monitoring, the PH-50 stands out as a reliable choice for those who appreciate high-quality sound. With its balanced design, multitude of features, and solid performance, it is an ideal companion for both headphones and audio systems, ensuring that every note is reproduced with clarity and precision.
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