Soundlab Ultimate-1 (U-1) // Preowned / Electrostatic Speakers / The Flagship

The Sound Lab Ultimate‑1 (U‑1) is a towering electrostatic legend built for audiophiles who don’t just want sound—they want an experience. With its curved cell-panel design that delivers seamless dispersion and staggering imaging, the U‑1 is more than speaker—it’s the room becoming the music. It's about as efficient as electrostats get, pairing deep, open-air presentation with effortless dynamics, and it’s as distinctive visually as it is sonically. This isn’t a tasteful little bookshelf—it’s a statement of power and poise in full-scale.

There are a few small blemishes in the frame and cloth, but not overly noticeable. We can offer cosmetic restoration and reclothing as a service if desired.

Condition

9/10

Serial No.

U10008

Restoration

• Extensive audio testing
• No rattles or unwanted vibrations

Factory Specs

Frequency response    24 Hz to ultrasonics
Audio power (min/max)    100/500 watts (music)
Radiating area    2200 square inches
Horizontal dispersion    90 degrees
Vertical dispersion    Projected field height of speakers
Impedance (nominal)    8 ohms
Sensitivity    Equivalent to 88 dB/1w/1m,
measured at 4 meters
Controls     
Bass level    4 positions in 3 dB steps
Mid-frequencies    4 positions in 3 dB steps
High-frequencies    Continuously variable
D.C. Bias    Continuously variable
Height x Width x Depth    82" x 38" x array: 27", base: 24"
Weight (per speaker)    210 pounds
Accessories    Tip-toes (set of 10)

 

Shipping

To ensure safe arrival, we often use private couriers. These are transporters in Sprinter Vans or pulling covered trailers often moving art and antiques across the country. Absolutely the safest way to ship short of you picking it up yourself. This piece ships to the contiguous United States for a flat rate of $600, which includes our packaging and our insurance. Of course, we'll ship anywhere in the world, just drop us a line and we'll give you an estimate – even if you're just curious.

Stock No.

9074082545885