Steinway Lyngdorf S-Series System - Complete

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General:
The "S Seires" from Steinway Lyngdorf is a sophisticated series of audio components designed with class D amplification and high power electronics. This setup when purchased new would have costed around $25,000.

Included Units:
Pair of A-1 Amplifiers
SP-1 Processor
S-210 Boundary Woofers (Pair)
S-14 Speakers (Pair)

Speakers include a pair of smaller (but heavy) wall-mount style satellites, the S-14, and two S-210 boundary woofers. The woofers are designed to be placed in the corners of your listening space to leverage natural "room gain" to deliver deep, effortless, and powerful bass.

The S Series also utilizes advanced digital signal processing to perfectly align the timing and phase between the corner woofers and wall satellites (crossover at 300Hz), ensuring all sound frequencies arrive at your ears simultaneously.

Included will be a microphone to perfectly calibrate the system's DSP using RoomPerfect™. It features Steinway Lyngdorf's proprietary, fully integrated room correction system (built right into the processor, no external computer needed).

Worth mentioning is unlike traditional analog systems, the A-1 digital amplifiers and SP-1 processor stay entirely in the digital domain until the signal reaches the drivers.

Inputs are standard S/PDIF optical and analog RCA, making this easy to add to an existing setup. During testing we were impressed by the sheer power of this setup. Price includes free Fright shipping in USA.

Included will be everything you need to listen to this system. This includes all the speaker cables, calibration microphone, owner's card, remote, Steinway Link Cat5 cables for communication and audio transfer, along with documentation.

SkyFi Cosmetic Notes:
Some of the original packing material is missing. Light marks are present on the woofer cabinets. The controller and one amplifier has faceplate blemishes. Both amplifiers have had their rubberized covers replaced with painted covers by Steinway Lyngdorf. The feet on the woofers are slightly different from unit to unit. Overall condition of everything is good.

SkyFi Technical Notes:
Both amplifiers were sent out to Steinway Lyngdorf in November of 2025 for bench evaluation and replacement covers. The speakers also received a fresh set of strings at the same time.

Cabling is included for the speaker connections: One pair of XLO solid core wires terminated on one end with speakOn connectors - Woofers 13ft. One pair of XLR solid core wires terminated on one end with speakOn connectors - Mid/HIgh 8ft.

The manual and setup guide for the system is located on a USB drive. A long XLR cable is included which interfaces with the calibration mic for room correction.

Ownership:
Single Owner

Connections:
RCA, Optical Digital,

General Sound:
Big beautiful musical sound with little fatigue.

Cosmetic Condition:
7/10 = Good. One or two minor scratches. Well Maintained. See our detailed rating description here.

Working Condition:
Working perfectly and tested in our lab and listening room.

Included:
Pair of A-1 Amplifiers
SP-1 Processor
S-210 Boundary Woofers (Pair)
S-14 Speakers (Pair)

All Necessary Cabling + Power Cords.

Packing:
Original Manufacturers Packing

Specs:
Model S-15 / Model S Speaker Specifications
- Frequency range: 120–22,000 Hz
- Max SPL @ 1m: 114 dB
- Amplification needed: 1 channel
- Dimensions (H x W x D): 26.0 x 20.0 x 7.9 cm (10.2 x 7.8 x 3.1 in)
- Weight: 4.4 kg (9.7 lbs)
- Finishes: Matte black, satin silver, high gloss black, high gloss white, and custom finishes
Model S-210 Boundary Woofer Specifications
- Frequency response: 25–500 Hz
- Max SPL @ 1m: 114 dB (117 dB Corner)
- Amplification needed: 1 channel
- Weight: 20.5 kg (45.2 lbs)
Model A1 Amp
- Input: 1 x Steinway Lyngdorf Digital Link (CAT 5e based), 1 x RJ12 RS232 connector
- Output: 1 x Steinway Lyngdorf Digital Link (CAT 5e based), 2 x Speakon® speaker output
- Power Rating: 2 x 400W @4 Ohm
Sp-1 Processor
- Description: Rack mount or freestanding stereo processor
- Input: Digital (≤192kHz/24bit): 4 x S/PDIF (coax), 6 x Toslink (optical), 1 x USB (audio input) – Analog: 4 x single-ended, input for microphone
- Output: 3 x Steinway Lyngdorf Digital Link (CAT 5e based)
- Miscellaneous: 1 x Trigger input, 1 x IR sensor input, 1 x USB (software update), 1 x RJ 12 (RS 232 control)

Dimensions:
S-210 (W x H x D): 36.0 x 37.3 x 36.0 cm (14.2 x 14.7 x 14.2 in) , S-15 Dimensions (H x W x D): 26.0 x 20.0 x 7.9 cm (10.2 x 7.8 x 3.1 in), A-1 Amp Dimensions (H x W x D), Freestanding: 4.9 x 45.0 x 34.6/39.6* cm / 1.9 x 17.7 x 13.6/15.6* in Dimensions (H x W x D), Rack Mount: 4.4 x 48.3 x 34.6/39.6* cm / 1.7 x 19 x 13.6/15.6* in

Approximate Age:
2012


Testing Process:
Our speaker evaluation process starts with a visual inspection of all drivers. We are looking for damaged or deteriorating woofer surrounds, dented tweeter domes, and cone damage. We also inspect the speaker connection points for loose or broken connectors.

After the initial visual inspection we connect the speakers to a reference amplifier with our preferred test tracks. With the speakers placed with proper distance we listen to each driver to make sure that they are producing the intended frequencies with no signs of distortion or rattle.

During listening tests with test tracks we check for proper stereo imaging and bass response at various listening levels. If there are any audible signs of issues, the speakers are taken to the bench where we perform a frequency sweep to isolate the issue so that it can be resolved by component repair or replacement.

Our subwoofer evaluation process starts with a visual inspection of all drivers. We are looking for damaged or deteriorating woofer surrounds, cone damage, or rubbing voice coils. We also inspect the input connections for damage.

After the initial visual inspection we connect the sub at our bench and perform a sine wave sweep from about 200 Hz down to around 10 Hz. During this sweep we are listening for excessive rattle or other signs of improper function.

If the sweep passes we then increase the input level to evaluate how the woofer performs at high output levels. If the woofer has built-in crossover adjustments or multiple connection options these features are tested at this time.

We complete the subwoofer evaluation by feeding the unit with an audio signal in conjunction with our house music system to see how it responds to low frequency content in real world conditions while paired with a full range system.