SOFIA-104

SOFIA-104

Design Overview – Sofia-104

The Sofia-104 loudspeaker features a distinctive and original design, setting it apart from
traditional 2- or 3-way speaker systems. Our goal was to engineer a loudspeaker that meets
the highest standards of true high-end sound reproduction — both technically and
musically.

One of the most complex aspects of loudspeaker design is achieving clean, natural bass
without sounding boomy or artificial. To address this, the Sofia-104 incorporates a total of
three woofers into a relatively compact floor-standing cabinet:

• Two 6.5″ aluminum cone woofers are mounted on the front panel.
• A 7″ long-stroke passive radiator is placed at the rear.
• A 10″ woofer is located on one side of the cabinet (not powered).
• On the opposite side, a 10″ passive radiator with extremely high X-max (excursion capability) is installed.

This passive radiator design eliminates port noise while delivering tight, articulate, and
well-controlled bass.

For high-frequency reproduction, the speaker features two magnesium/aluminum tweeters
positioned between the front woofers in a quasi-coaxial configuration. These tweeters
handle frequencies up to 10,000 Hz, providing accurate and detailed sound.

To extend the frequency range even further, a super tweeter is mounted on top of the

cabinet. It includes a two-position switch that allows for high-frequency level adjustment:

– Neutral (0 dB)- +2 dB boost

This adjustment gives the listener the flexibility to tailor the treble response to their

preference or room acoustics.

Specifications

• Type: 3.5-way passive radiator enclosure
• Woofer: 10” wood fiber cone with neodymium magnet by Peerless, featuring low
  moving mass and low resonance frequency
• Tweeters: Two high-resolution aluminum/magnesium dome tweeters with neodymium
  magnets.
• Midwoofers: Two 6.5” Peerless Superior Dynamic Sounds (SDS) Series aluminum cone
  drivers. Top and bottom drivers operate in different frequency ranges to compensate
  for baffle step effects. 7” additional passive radiator for 2 6.5 midwoofers installed on
  the back.
• Supertweeter Fostex installed on the top got 2 positions to adjust high frequency level.
• Crossover Points: 100 / 600 / 2000 / 12000 Hz (second-order design)
• For woofer crossover we use inductors with extremely low DC resistance (0.078 ohm)
  for tighter and more accurate bass
• Frequency Response: 28Hz–28kHz (±3dB)
• Nominal Impedance: 4 ohms (minimum 2.7 ohms)
• Sensitivity: 88 dB (2.83V/m)
• Recommended Amplifier Power: 20–120W
• Weight: 68 lb
• Dimensions: Speaker: 40” H × 8.5” W × 13” D; With outriggers: 41.5” H × 10” W × 16” D
• Cabinet Material: Bamboo ply / MDF sandwich construction 1” 25 mm total thickness
• German Finite Element stainless still ball bearing speakers pads
• Price- $7950 for pair 60 days money back guarantee.