Χαζεύοντας για Gainclones στο diyaudio έχει πέσει το μάτι μου σε μια κάπως ξεχωριστή υλοποίηση:
http://www.neurochrome.com/modulus-86-rev-2-0/

Κάνω paste από το website του:
Οι πλακέτες πωλούνται στο αρχικό link και δεν περιλαμβάνουν τα υλικά. Θεωρώ ότι μιλάμε για μια κάπως τσιμπιμένη υλοποίηση Gainclone. Παραθέτω και το link του diyaudio στο οποίο γίνεται μεγάλη συζήτηση:
http://www.diyaudio.com/forums/vend...mposite-amplifier-achieving-0-0004-thd-n.html
http://www.neurochrome.com/modulus-86-rev-2-0/

Κάνω paste από το website του:
Χαρακτηριστικά:The Modulus-86 Rev. 2.0 is a composite amplifier providing true world class performance. This performance level is reached by using a high-performance audio op-amp to perform error correction on a high-power chip amplifier. The Neurochrome composite amplifier topology results in a high-performance chipamp-based amplifier with vanishingly low distortion and phenomenal sound quality.
The Modulus-86 is a turnkey high-performance analog subsystem. It achieves state of the art performance using readily available off-the-shelf parts. The Modulus-86 uses an LME49710 precision audio op-amp to control an LM3886 power amplifier. An OPA2277 precision op-amp is used as a high-end DC servo with third order filtering for an ultra-low output DC offset and fast settling time. The DC offset is less than 200 µV and is reached within ten seconds of power-up. A THAT1200 differential receiver provides common-mode rejection rivaling that of a line transformer, thus, minimizing hum injection by eliminating ground loops in the signal path.
- Vanishingly low 0.000067 % THD (1 W, 8 Ω, 1 kHz).
- Ultra-low 0.00012 % THD (38 W, 8 Ω, 1 kHz).
- Ultra-low 0.00034 % THD+N (38 W, 8 Ω, 1 kHz).
- 40+ W output power (8 Ω) when using the Power-86 and recommended transformer.
- Ideally suited for multi-channel amplification.
- Differential input with nearly 90 dB CMRR eliminates hum and ground loop issues.
- Phenomenal power supply rejection ensuring consistent, high performance even with unregulated power supplies.
- Ultra-low -120 dB inter-channel crosstalk greatly simplifies the power supply requirements.
- Elaborate use of planes and copper pours to maximize circuit performance by minimizing supply and ground impedances.
- Low-inductance signal ground connects to power ground at one point only for maximum performance.
- On-board Zobel and Thiele networks for maximum stability even with capacitive loads.
- On-board EMI/RFI input filter and ESD protection.
- On-board low noise voltage regulators for the driver op-amp and DC servo.
- Power and output terminal blocks accept wire sizes up to AWG 10 (5.2 mm2).
- All leaded. Easy to solder. 90 × 70 mm board footprint.
Οι πλακέτες πωλούνται στο αρχικό link και δεν περιλαμβάνουν τα υλικά. Θεωρώ ότι μιλάμε για μια κάπως τσιμπιμένη υλοποίηση Gainclone. Παραθέτω και το link του diyaudio στο οποίο γίνεται μεγάλη συζήτηση:
http://www.diyaudio.com/forums/vend...mposite-amplifier-achieving-0-0004-thd-n.html