Lehmann Audio Decade
2 Box phono stage. Lehmannaudio is has built a reputation and unrivalled customer satisfaction on the sound and build quality of phono stages. The ambitious Decade effectively fills the gap between the Black Cube SE II and the Lehmannaudio reference phono stage, the Silver Cube. In the Decade, like in all Lehmannaudio devices, top notch technology is used that normally can be found only in price ranges far above.
The input stages of the Decade can also be found in top notch mixing consoles and high class microphone preamps of professional studio electronics. The highly accurate, passive RIAA equalisation network is placed between two linear gain stages and uses precision MKP capacitors. This results in a very stable soundstage reproduction and pin point localisation of instruments.
The maximum gain of 66 dB is well enough for even very exotic low output MC cartridges. Impedance load adaption is practically infinite as with all Lehmannaudio phono stages: there is a free slot for a custom impedance so that every existing MC cartridge on the market can be loaded properly. Input capacitances are adjustable as well.
The Decade is the first phono stage by Lehmannaudio that offers a “Soft-Bass- Rolloff-Filter” and gain selections accessible via toggle switches at the face plate. Both, gain and filter functions, are executed by studio grade relais inside the unit.
The Decade is powered by the PWX II, a power supply especially developed for the unit which is downward compatible with the PWX. This means that Black Cube audio sections can also be connected. The second power outlet at the PWX II is made especially for that purpose. The PWX II power supply with chokes at critical places powers the Decade with very clean DC power and – like the Silver Cube – is connected to the audio section via a shielded cable with Neutrik XLR plugs.
The input stages used in the Decade can also be found in top notch mixing consoles or in well known professional microphone preamps.
The passive filter network between two linear gain stages realized with precision MKP caps
Several resistive and capacitive load options as standard
Front switchable gain (36dB – 66dB) and soft bass rollof
Onboard slot for custom impedance
Zero global feedback Class A output stage technically identical with Black Cube Linear
High quality gold plated pcb mount RCA connectors for audio
High quality double sided printed circuit board for optimal signal routing
Neutrik connector with gold plated contacts for supply connection (as Silver Cube)
Faceplate anodized aluminium in either black or silver finish
Input Stage: Dual-Mono Microphone Preamp Chip, Newest Generation
Gain Settings: 36dB, 46dB, 56dB, 66dB
Max. Gain: 66dB
Internal Impedances: 47kΩ, 1kΩ, 100Ω (Selectable)
Custom Impedance: Yes, Via Onboard Slot
Internal Input Capacitance & Cap Type: 47p, 100p, 220p, 1n KP 1% And Combinations (47p Always Active)
Soft Bass Roll-off Filter:
Toggle Switch On Face Plate
Toggle Switch On Face Plate
RIAA Filter Caps: MKP
Bass Coupling After RIAA: MKP
Second Gain Stage: Dual Mono
Burr Brown OPA 134
Discrete Output Buffer Zero Global Feedback: (Bipolar Class A)
Power Supply Features on Audio Board: LC Pi-Filter
RC-Filters with Extensive Electrolytic Bypass