Wednesday, July 11, 2012

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.

• 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!