Krell kst-100

I bought this amp two years ago.  It has a broad soundstage and great performance.  This is a very impressive sounding amp.  I gave it a rating of "good' because it has some surface scratches and is not the prettiest amp, but it sounds and performs perfectly.  I have seen this amp advertised for $2000, so I feel this is a good price. 

Description: stereo
power amplifier. Output power: 100Wpc/8 ohms (20dBW), 200Wpc/4 ohms
(20dBW), 400Wpc/2 ohms (20dBW), 800Wpc/1 ohm (20dBW).

Runs in Class-A up to 50W then drops to class A/B. 

Output impedance:
0.125 ohms. Damping factor: 150. THD & IMD: less than 0.1% under all
conditions. S/N ratio: 96dB A-weighted. Slew rate: 50V/µs. Input
sensitivity: 1.5V for full output. Input impedance: 47k ohms.

Dimensions: 6.4" H by 18" W by 14.8" D.
Shipping Weight: 60 Lbs

NOTE:  I took these pictures in my studio. (They are not stock images).
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STEREOPHILE REVIEW
The KST-100 is quite compact by Krell standards, its heatsinks
contained within the overall width of the alloy front panel. Described
as class-A to half power, it is quite powerful at
100Wpc into 8 ohms (20dBW); ie, 50W 8 ohms class-A, with the
specified power doubling into successive halvings of that impedance;
with 800W quoted into 1 ohm. Simple removal of the top cover provides
access to a mono switch which allows the amplifier to perform in
unbalanced bridge mode, working as a monoblock delivering 400W into 8
ohms and 800W into 4 ohms (both equivalent to 26dBW, footnote 1). Given
the past history of Krell products being able to drive low-level
impedances, these figures are believable.

Balanced and unbalanced working is possible: around 1.5V input is
required for full output; only the highest-output CD player/processors,
capable of giving 3–5V, will be able to drive it directly without a line
amplifier.