Twochannel Reference Build — Neutral Separates Reference

Aimed at a treated two-channel room where accuracy outranks flattery, and at an owner moving up from an integrated to full separates. This is a reference-tier neutral system designed to resolve what is on the recording, not to impose a house sound.

This is a full separates chain assembled around the demands of a three-way floorstander that presents a nominal 8-ohm load dropping to a 3.0-ohm minimum, with a published sensitivity of 90dB (2.83V, 1m). A speaker like this rewards current delivery more than raw wattage, which is why the amplification is built from two monoblocks rated 300W into 8 ohms, 600W into 4 ohms, and 1,200W into 2 ohms. That near-doubling of output as impedance halves is the load-bearing technical choice: it means the amplifier holds its grip through the bass region where the speaker's two 250mm drivers draw the most current, rather than compressing on dynamic peaks. With the speaker's recommended power window running from 50W to 1,000W, a single 300W monoblock per channel sits comfortably inside it with headroom for transients in a dedicated room. The front end is divided so each stage does one job. A dedicated network transport handles only the bitstream, passing PCM up to 768kHz and native DSD to a separate ladder-type converter over an isolated digital link, keeping the streaming hardware's switching noise out of the conversion stage. The converter's balanced output, near 150 ohms, drives a preamplifier with a 100k-ohm balanced input, so the interface is voltage-driven with no impedance loading penalty. The preamp's volume is handled in 0.5dB steps across a 100dB range, which matters for low-level listening in a treated room where small gain increments are audible. What the listener hears is defined by restraint. The 28.5dB amplifier gain and 119dB signal-to-noise figure keep the noise floor below the threshold of the room, so quiet detail in the upper bass arrives with weight but without thickening into the lower midrange. Stereo image placement stays stable because each channel runs its own chassis, transformer, and power supply, removing the shared-rail crosstalk a stereo amplifier introduces. The neutral character here is a consequence of measured choices rather than voicing: distortion held near 0.006%, flat response from 5Hz to 100kHz at the amplifier, and dual-mono isolation from converter through output. Swap the monoblocks for a single stereo chassis and the system loses its current reserve into the 3-ohm dip; that reserve is what keeps the presentation composed at volume.

Difficult recordings get no cosmetic help. Its neutral balance and low distortion expose thin mastering, sibilance, and compression on poorly produced tracks, because nothing in the chain adds warmth to cover them. It also asks for room and budget discipline: the 100kg-class speakers and two 62kg monoblocks need a dedicated, treated space and substantial floor area, and they will overwhelm a room under roughly 200 square feet where the bass cannot develop. Finally, the separates topology means more boxes, more interconnects, and more rack space than an integrated approach, and the system is not a streaming-convenience setup, since the transport and converter assume a wired network and careful setup.

• 01

  Swap Grandioso M1X → Grandioso S1X (−$35,500)

  Replace the two 300W monoblocks with a single stereo chassis to reduce box count and cost. The stereo amplifier runs 50W into 8 ohms in pure Class A, trading the monoblocks' current reserve into the speaker's 3-ohm dip for lower power and a single shared power supply; suitable for lower listening levels in the same room.

• 02

  Swap Reference → Premier (+$6,500)

  Step the converter up to the four-module ladder design with a separate power base. This raises dynamic-range headroom and adds an upgradable clock and output stage, at the cost of a second chassis; the digital interface to the transport is unchanged.

• 03

  Swap 801 D4 → S5 (+$28,500)

  Move to a sealed-box aluminum-cabinet floorstander for tighter, more damped bass at the expense of the lower-bass extension the ported three-way reaches. The monoblock current reserve suits the sealed load equally well.