Sold: Lyngdorf's SDA 2175 amplifier in excellent condition, and including original box and manual, part of a second system that I simply don't use often enough.
Reviewers agree that the Lyngdorf amps are special, and the SDA 2175 is no exception:
“Using the Lyngdorf is like connecting the loudspeakers directly to the wall outlet! The sound is crystal clear and pure, with an immaculate transient power and precision in details. It never sounds edgy or “digital” as we have so often experienced with other digital amplifiers. Instead the presentation of music is soft and lively in a most remarkable and so to say very self-assured fashion that makes other amplifiers sound diffuse and dull."
HiFi and Music Sweden
“It didn’t take long to realise the SDA-2175 was masterful with classical music, an absolute first choice for anyone upset by the unhappy coupling of violin and transistor. Kettle drums sounded convincingly large and sonorous, if not thunderous. There was a nice push from the brass section of the Philharmonia, and I noticed the same as massed violins of the London Symphony Orchestra reached a crescendo with Rachmaninov’s Piano Concerto No2.The amplifier has real midband shove; it’s very lively and say: I felt it was smooth, truthfully dynamic and possessed an evenness that was both unusual yet also very relaxing.” Hi-Fi, UK
“Can the Lyngdorf rock? Absolutely! Led Zep, Stevie Ray, The Who and AC/DC were all well served with slamming snares and kickin' kickdrums. Electric as well as acoustic guitars were rendered with all attendant guts and gore or unamplified zing when necessary.”
"My own piano solo recordings had a naturalness that I'd call near the top tier at any dollar amount"
“It is true that a picture says a thousand words - it's just that some say them so much better than others. The Lyngdorf is one of those. An outstanding value in a true high-end quality, powerful amplifier.“ Stereo Mojo, US
“After a few days with the SDA 2175 I am left with the impression that it does absolutely nothing
wrong! It does everything exactly right to my ears.” Audiophile, Norway
$1,125 or best offer. Buyer pays for shipping of choice and paypal fees if used. I can usually ship within 24 hours with paypal or US post office money order. All other forms need to clear my bank before shipping which can take 5-10 days. Thanks for looking.
Description from Lyngdorf:
The SDA 2175 is a high-performance power amplifier designed without compromise. It can act as a controllable amplifier in Lyngdorf systems or as a power amplifier for conventional pre-amplifiers.
The SDA 2175 is not your regular class D power amplifier. The output stage uses Pulse Width Modulation with a patented switch speed optimization technology. This ensures a low and linear natural distortion, and an unmatchable performance is achieved by using less feedback compared to typical Class D amplifiers.
And the fully balanced signal path all the way through the amplifier to the PWM conversion stage guarantees a remarkable performance with a signal-to-noise ratio superior to any other Class D amplifier in the market!
Careful and sensitive design touches can be seen throughout the amplifier: it starts at the mains input with a low-noise Holmgren toroidal transformer with power supply feed-forward compensation, suppressing the variations in the output rather than relying on feedback-based error correction normally used. This feed-forward technique originates from the design of the Millennium - the Lyngdorf state-of-the-art true digital amplifier.
In the critical output stage only the highest quality components have been used, e.g. polypropylene capacitors and linear ferrite material in the output filter. Combined with other techniques this results in low and frequency-independent distortion. Consequently wideband musical instruments can be re-played without any added harmonics - any source will be recreated to sound the way it was recorded.
Output power, 4 ohms 2 x 375 Watt 1KHz, 0.1% THD+N
Output power, 8 ohms 2 x 200 Watt 1KHz, 0.1% THD+N
Nominal load impedance 4 - 8 Ohms
Frequency response 0.3Hz-33KHz -3dB points, 8ohms load.
Frequency response 20Hz-20KHz -0dB/+0.2dB, 8ohms load
Output impedance 0.035 Ohms 20Hz-1KHz
Output impedance 0.4 Ohms 20KHz
THD+N 0.004% @1W/8 ohms A-wgt.
THD+N 0.006% @1 W/4 ohms A-wgt.
THD+N 0.01% @100 W/8 ohms A-wgt.
THD+N 0.07% @300 W/4 ohms A-wgt.
S/N ratio 117dB A-wgt. Ref. 200 /8 ohms
Dynamic range
A-wgt. Ref. 200 W/8 ohms
Channel separation 84 dB 1 KHz, 200 W/8 ohms
Peak output current +/-40A
Mains voltage range 100-120V AC, 50-60Hz 115 V version
Mains voltage range 200-240V AC, 50-60Hz 230 V version
Power consumption 1.5 W Standby mode
Power consumption 35 W Operate mode, no output
Power consumption 116 W 2 x 37.5 W / 4 Ohms
Power consumption 820 W 2 x 300 W / 4 Ohms
Width 450 mm / 17.72in
Depth 355 mm / 13.98in Incl. loudspeaker connectors
Height 100 mm / 3.94in Including feet
