Spec

• This KIT is a headphone amplifier kit that combines a "low-distortion, low-noise, high-precision" operational amplifier with a diamond buffer. The widely used 72 mm x 47 mm size of the board allows it to fit in a variety of cases. In addition, carefully selected parts, including acoustic parts, are used throughout the product, making it easy to assemble as a cost-effective product in every aspect of "size, characteristics and specifications." < Features > - A true headphone amplifier that uses a "high-precision op amp + diamond buffer circuit." ・A "current mirror circuit" is used for the power supply. The circuit design allows for any type of power supply. ・Acoustic resistors and acoustic capacitors are used to determine the quality of sound. In addition, the power supply circuit includes low-Z capacitors and other high-quality components at critical locations where sound and characteristics are critical. ・It uses a dedicated circuit board, making it easy to fabricate complex circuits. ・The circuit design also takes care of practical safety measures, making it safe to use even after KIT production. < Specifications > - Power supply voltage: + 5 V to + 12 V (+/- 2.5 V to +/- 6 V) - Headphone recommended impedance: 8 ~ 300 ohms - Input impedance: approx. 30 Kohms (standard specifications) - Headphone amplifier board size: 72 x 47 mm - Power consumption (maximum output rating): DC + 5 V ... approx. 45 mA/DC + 12 V ... approx. 90 mA
• ◇Technical information: How to make a headphone amp kit (LHPA-DIA _ BUFFER-KIT)
• (1)How to Make a Headphone Amp Kit (LHPA-DIA _ BUFFER-KIT) Part 1
• http://select.marutsu.co.jp/list/detail.php?id=157
• We'll show you how to create it in detail.
• (2)How to make a headphone amp kit (LHPA-DIA _ BUFFER-KIT) # 2
• http://select.marutsu.co.jp/list/detail.php?id=156
• Check the operation and characteristics of the completed kit.
• (3)How to make a headphone amp kit (LHPA-DIA _ BUFFER-KIT) # 3
• http://select.marutsu.co.jp/list/detail.php?id=155
• Change the opamp to see the change in sound quality.
• The voltage used depends on the type of op-amp, and we will explain this.
• (4)How to make a headphone amp kit (LHPA-DIA _ BUFFER-KIT) # 4
• http://select.marutsu.co.jp/list/detail.php?id=154
• For those who say that higher voltage is better sound, but AC adapter is inconvenient
• Here are some useful modules:
• Production article: Using the headphone amplifier kit LHPA-DIA _ BUFFER-KIT!　
• Making headphone amplifier using case for Linkman amplifier kit
• http://select.marutsu.co.jp/list/detail.php?id=166
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