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Bispa BSP-PHPA-05SPB



BSP-PHPA-05SPB is the headphone amplifier which was conscious of the portable audio player in use, and was designed and manufactured in recent years. It’s designed so that the characteristic of reproduction environment may fully be useful. It is the circuitry considered so that sufficient sound quality and characteristic might be acquired. Moreover, in order to realize “ease of use, functionality, and high-quality sound”. It is careful also about selection of parts.
Since the power supply “operates [size AAA battery x 4]”, it can be treated simply. Furthermore, it is designed also in consideration of the electric characteristic to respond to many headphone.
The difference with the existing product is “strengthening of amplitude power which specialized in headphone.” It is the product which performed the circuitry united with this, and a substrate design.

About a gain change.
The mode for choosing the volume control range can choose now two kinds of these products. At the time of product shipment, it is set to low gain mode (twice as many profit as this). When it is thought in this state that volume is small, please use in high gain mode (6 times as many profits).
The change method in each gain mode.
Each channel should put the jumper PIN which is attached at the time of product purchase. By carring out like this, it becomes high gain mode. Please extract the jumper PIN, when set to high mode. By carrying out like this, it becomes low gain mode.
Caution! : Please keep the jumper PIN carefully not to lose. Moreover, where “it is certainly OFF about a power supply” is used, please make a change in each gain mode. It will become a cause of failure, if the jumper PIN is changed without turning OFF a power supply.

An electrical property and specification.
Specification:
Size: 105x67x27 mm (the maximum size / schedule)
Power supply: Size AAA battery x 4 use (a charge pond and primary cell use good*)
Input: 3.5phi stereo mini jack input impedance: about 10K ohm
Output: 3.5phi stereo mini jack recommendation impedance:
Low gain & high mode - 8ohms - 600 ohms (low gain mode is strongly recommended at the time of earphone use.)
*About a battery, you can use the thing of the following specification.
- A change pond -- the AAA of 1.2V standard -- a charge pond (nickel hydoride battery recommendation)
- Primary cell -- An alkaline battery and manganese cell
 
Caution! : The battery of a different kind cannot be intermingled or it cannot use, being able to mix the battery which deteriorated.
 
Measurement conditions: Measurement apparatus:
Panasonic VP7723-B Power supply
Voltage -- DC+5V
Basic measurement frequency -- 1-kHz (LDF = 80 kHz)
Measurement load -- 30ohms
 

• At the time of low gain mode (a twice as many profit as this)
• Renewable frequency range: -- 10Hz - 100 kHz
• Maximum output: -- 100mW+100mW (THD+N=3% 0’clock)
• THD+N: less than each ch 0.0010% (at the time of a 0.75Vrms output)
• S/N: 114dB (JIS-A)
• At the time of high gain mode (6 times as many profits)
• Renewable frequency range: -- 10Hz - 100 kHz
• Maximum output: -- 100mW+100mW (THD+N=3% 0’clock)
• THD+N: less than each ch 0.0018% (at the time of a 0.75Vrms output)

·         S/N: 103dB (JIS-A)