M11 Series II R2R Digital to Analog Converter

The comparison between the Bricasti M11 R-2R Classic and the M1 Series II centers primarily on their differing digital-to-analog conversion technologies and the resulting sonic character and customization options.

1. DAC Architecture

• M11 (Discrete R2R): The M11 utilizes a discrete 20-bit R2R ladder DAC. This circuit was adapted from an industrial-grade DAC not originally intended for audio, which Bricasti engineers built into a specialized environment to achieve high-fidelity musical playback.
• M1 Series II (Delta-Sigma Chip): The M1 Series II is a chip-based DAC. It uses a dual-mono configuration of the Analog Devices ADI 1955 24-bit chipset.

2. Sonic Performance

• M11 Character: The R2R design of the M11 prioritizes timing and musical engagement over pure technical specifications. It is described as having a "supple" and articulate sound that delivers musical power without "hard digital edges." It excels at portraying the "roundness" of notes, including natural attack, tonal color, and decay.
• M1 Series II Character: Despite being chip-based, the M1 Series II is noted for its ability to remove "electronic tension" and sound remarkably analog—comparable to a ladder DAC. It offers a clean, straightforward resolution that makes vocals feel effortless and centered, often appearing "a step in front of the speakers"

3. Filtering and Customization

• M11: This unit offers four filter options: two linear phase and two minimum phase. While the differences are audible, they are described as subtle refinements to the overall presentation.
• M1 Series II: This unit features a more extensive filtering system with eight different settings. These filters allow for significant sonic tweaking, ranging from "clean and articulate" (settings 0–1) to "rich and warm" (settings 4–5), or "very detailed" (setting 8). This makes the M1 Series II more versatile for matching with various speakers and systems.

4. Price and Positioning

• M11: Positioned as Bricasti's most cost-effective R2R DAC, priced at $9000 and $12,500 respectively (or $10,000 and $13,500 with the network card option), both contain the core elements of the ladder DAC found in the flagship M21 but at a more attractive price for those who specifically prefer the R2R sound.
• M1 Series II: This model is priced higher, at $12,500 (or $13,500 with the network card). It is marketed as a high-quality "boutique" option for listeners who want the versatility of a preamp, DAC, and streamer in one unit without reaching the extreme price points of the flagship series.

5. Key Design Differences

• Clocking: The M11 Series II emphasizes superior onboard clocking (Direct Digital Synthesis), which Bricasti considers more critical for ladder DACs; Independent clocks for each channel ensure accuracy.
• Form Factor: The M11 comes in the traditional classic size and larger Series II chassis. Both units share the same Bricasti aesthetic of machined aluminum.