Madcap Premium Amp V2.5a

Madcap Audio Portable Headphone Amplifier (Premium Edition 2.5a) Technical Highlights Design Aspect/Features • Hammond 145580X series Compact Aluminum enclosure • Custom CNC milled front plates • 2 stage opamp design • Opamps in a Gold-Plated DIP Socket • Custom printed Madcap Audio PCB • Alps RK097 Volume Control with built in ON/OFF switch • DC Power/Charging Jack • Dimension: aprox size with knob:(5.4 x 9.5 x 2.3 cm) Improved Aspect/Feature Improved ruggedness with the new faceplate design Hammond 1455C80x case The premium edition’s surface area is almost the same size as a credit card, and  has a thickness of about 23mm. The small dimension makes the amplifier very pocket-friendly. The extruded aluminum Hammond 1455C80x case, available in cool black or brushed silver with anodized finishes. It is very attractive and sturdy. Power Source Unit comes with rechargeable high dense 400mAh PP3 NiMH 9V battery. 2 Stage Opamp Design The Madcap portable amplifier features two stage opamp approach that improves Current handling. There are four opamps all together: two for the left ear and two for the right. So what do all these means to you? With improved Current handling, it can drive headphones and IEMs that have relatively low impedance properly. This improves the sound quality rather than the volume, as low impedance headphones/earphones requires more Current to drive them properly. Amplifier Chip The Premium edition comes with a default pair of OPA2227 Dual channel amplifier chip as the gain stage amp. The opamp is mounted in a gold-plated 8-pin DIP socket, allowing you to purchase other chips to alter the amp's "signature." With the new design, It allows user to use a wide varieties of Opamps available in the market.(AD8397 , AD797 or ,OPA627au etc..) Amplifier stability is an important concern when trying alternative Opamps. A DIP socket gives you the option to try different Opamps aka (Opamp rolling)

High Quality Components The quality of an amplifier's capacitors, resistors, and amplification chips plays a significant role in accurate sound reproduction, which includes: - AlpsRK097 Switch - High quality Wima caps (input filtering caps) - Panasonic E-cap (rail splitter) - +/- 1% resistor Volume Control The Madcap Audio Amp features the very popular Alps RK097 potentiometer, paired with a high quality brushed aluminum knob, Shielded Front/back plates. DC Power / Charging Jack Any linear-regulated 12V DC power adapter with a 2.5mm submini jack can be used to power the Audio Amplifier. Plugging in a DC power supply in “on” position will power up the device in playback mode. Plugging in a DC power supply in “off” position set the device in trickle charging mode. Included • New Madcap Audio Headphone Amplifier with version 2.5 pcb. • PP3 NiMH 9V battery • Regulated 12 v 400mhA Power supply • Quick Instructions Sheet *All internal rechargeable comes with a limited 6mth warranty. *Despite each enclosure being brand new, front plates will occasionally have some sort of scratch or dent (not always!). Additionally, you should anticipate tiny imperfections due to the hand built nature of the product. Please excuse these possible minor cosmetic defects. Thank you!

NwavGuy O2 Headphone Amplifier

Madcap Audio

Nwavguy O2 Headphone Amplifier

Descriptions The Objective2 (O2) is an open source headphone amplifier designed by Nwavguy, with emphasis on benchmark, performance and low cost.  Comes fully assembled with custom front plates O2 amplifier and a UK/SG power adapter.   Standard Features ·  Alps Dual Analog Potentiometer ·  3.5mm Input and Output Jacks ·  Dual Gain Switch (2.5x and 6.5x) ·  Opamps: JRC NJM2068D (Gain), 2x JRC NJM4556AD (Buffer) ·  AC Jack ·  Supports 9V Rechargeable NiMH Batteries for portability use. (Not Included)  Custom Features ·  Custom 2 piece assembly front plates. ·  CNC Aluminum base piece sand blasted finishing, clear anodized coated. ·  Customized acrylic front piece. ·  Flush Aluminum Knobs with rubber grips. Specifications ·  Frequency Response: +/- 0.01dB (20Hz-20kHz) ·  Gain: 2.5x and 6.5x ·  Output Impedance: > 1 ohm ·  Case Dimensions: 108.50 x 80.00 29.50 x mm (excludes knobs/buttons) ·  Weight: Aprox 300g, with batteries  ·  2 stage Opamp design Included ·  Fully Assembled O2 Headphone Amplifier with Custom Front Plates. (Rev 1.1 - Nov 30th 2011) ·  240V AC to 15VAC 500mA UK/SG 3 Pin Power Adaptor Included.

Madcap Buffered Portable Amplifier Ver 2.2

Madcap Audio

Buffered portable Headphone Amplifier Ver 2.2

(Standard Edition)

Standard Features • Updated Custom printed Madcap Audio PCB Ver 2.2 • 2 stage opamp design. • BB 2xOPA2227 Opamp in a Gold-Plated DIP Socket. • Alps RK097 Volume Control with built in ON/OFF switch • DC Power/Charging Jack • Penguin Peppermint enclosure • Dimension: Aprox size with knob:(6.2 x 11.3 x 2.4 cm) 2 Stage Opamp Design The Madcap Audio amp features a two stage opamp approach that improves current handling. There are four opamps in the design: Two for the left ear and two for the right. With improved current handling, it could drive headphones and IEMs that have relatively low impedance properly. This can improve the sound quality rather than the volume. As low impedance headphones/earphones requires more current to drive them properly. Amplifier Chip The Madcap Audio amp comes with a pair of OPA2227 operational amplifier. Its a very stable opamp that gives user a warm and punchy sound with a wide sound stage. The opamp is mounted in a gold-plated 8-pin DIP socket, allowing you to purchase other chips to alter the amp's "signature." Amplifier stability is an important concern when trying alternative opamps. A DIP socket gives you the option to try different opamps aka (Opamp rolling). High-Quality Components The quality of an amplifier's capacitors, resistors, and amplification chips plays a significant role in accurate sound reproduction. - - - High quality Wima caps (input filtering caps) - P - Nichicon E-cap (rail splitter) - + - +/ - 1% ¼ watt resistors New Printed Circuit Board Most Cmoy amplifiers are built on perfboard and use thin wires to transfer the audio an electrical signals. Madcap Audio amp is built on a high-quality printed PCB board. Which prove to be consistence and reliable when in operation. Added decoupling capacitor/unity gain design in the PCB for more stable op-amp operation. (Needed for certain opamps) The New PCB features improved grounding and circuitry routing.  Volume Control The Madcap Audio Amp features the very popular Alps RK097 potentiometer, paired with a very high quality brushed aluminum knob. Power source Unit can be powered by a standard PP3 9v battery. The Madcap Audio amp uses A standard resistor divider power system, with a pair of low ESR Nichicon 1000 uF capacitors. This will allow users to use higher current rated opamps without much limitation of current supply on ground. DC Power / Charging Jack Any linear-regulated 12V DC power adapter with a 2.1mm plug can be used to power the Madcap Audio Amplifier. Plugging in a DC power supply in “on” position will power up the device in playback mode. Plugging in a DC power supply in “off” position set the device in trickle charging mode. (While using the charging mode, make sure only uses a PP3 9v NiMh battery !) Enclosure The Madcap Audio Amp is cased inside of very attractive * Penguin Peppermint tin. The metal casing also acts as a protecting the circuit from some forms of external EMI / RF interference. Foam support keeps the battery securely in place. *Despite each tin being brand new, penguin peppermint tins occasionally have some sort of scratch or dent (not always!). Additionally, you should anticipate minor jack mounting imperfections due to the hand built nature of the product. Please excuse these possible minor cosmetic defects. Thank you!

Included • New Madcap Audio Headphone Amplifier • Quick Instructions Sheet

Premium Edition Version 2.5

Madcap Audio Portable Headphone Amplifier (Premium Edition 2.5) Technical Highlights Design Aspect/Features • Hammond 145580X series Compact Aluminum enclosure • Custom transparent Front/Back plates • 2 stage opamp design. • Opamps in a Gold-Plated DIP Socket. • Custom printed Madcap Audio PCB • Alps RK097 Volume Control with built in ON/OFF switch • DC Power/Charging Jack • Dimension: aprox size with knob:(5.4 x 9.5 x 2.3 cm) Improved Aspect/Feature • Improved compatibility with more opamps • Improved Depth and Soundstage • Improved current handling Hammond 1455C80x case The premium edition’s surface area is almost the same size as a credit card, and  has a thickness of about 23mm. The small dimension makes the amplifier very pocket-friendly. The extruded aluminum Hammond 1455C80x case, available in cool black or brushed silver with anodized finishes. It is very attractive and sturdy. Power Source Unit comes with rechargeable high dense 300mhA PP3 NiMH 9V battery. 2 Stage Opamp Design The Madcap portable amplifier features two stage opamp approach that improves current handling. There are four opamps all together: two for the left ear and two for the right. So what do all these means to you? With improved current handling, it could drive headphones and IEMs that have relatively low impedance properly. This can improve the sound quality rather than the volume. As low impedance headphones/earphones requires more current to drive them properly. Amplifier Chip The Premium edition comes with a default pair of OPA2227 Dual channel amplifier chip as the gain stage amp. The opamp is mounted in a gold-plated 8-pin DIP socket, allowing you to purchase other chips to alter the amp's "signature." With the new stable design, It Allows user to use a wide varieties of Opamps available in the market.(AD8397 , AD797 or ,OPA627au etc..) Amplifier stability is an important concern when trying alternative Opamps. A DIP socket gives you the option to try different Opamps aka (Opamp rolling). The new Premium version 2.5 PCB High Quality Components The quality of an amplifier's capacitors, resistors, and amplification chips plays a significant role in accurate sound reproduction, which includes: - AlpsRK097 Switch - High quality Wima caps (input filtering caps) - Panasonic E-cap (rail splitter) - +/- 1% resistors Volume Control The Madcap Audio Amp features the very popular Alps RK097 potentiometer, paired with a high quality brushed aluminum knob, Shielded Front/back plates and finished with Acrylic Top/back Plates. DC Power / Charging Jack Any linear-regulated 12V DC power adapter with a 2.5mm submini jack can be used to power the Audio Amplifier. Plugging in a DC power supply in “on” position will power up the device in playback mode. Plugging in a DC power supply in “off” position set the device in trickle charging mode. Included • New Madcap Audio Headphone Amplifier with version 2.5 pcb. • PP3 NiMH 9V battery • Regulated 12 v 400mhA Power supply • Quick Instructions Sheet *All internal rechargeable comes with a limited 6mth warranty. *Despite each enclosure being brand new, front plates will occasionally have some sort of scratch or dent (not always!). Additionally, you should anticipate tiny imperfections due to the hand built nature of the product. Please excuse these possible minor cosmetic defects. Thank you!