Krell KST 100

Single owner and never had to be repaired or service.  I had this amplifiers over 25 years and turn them on the other day and still working like new.  I would say total usage about 30-40 hours.  Amplifiers are in excellent condition.  Willing to ship anywhere in the U.S.A and make a crate for your shipping needs as long as buyers pay for it.  All credit card payments or Paypal payments require additional 3%.  If interested please send me via message or email me at [email protected].

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 (more on this later), 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.

Description: stereo power amplifier. Output power: 100Wpc/8 ohms (20dBW), 200Wpc/4 ohms (20dBW), 400Wpc/2 ohms (20dBW), 800Wpc/1 ohm (20dBW). 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. (80lbs)

Serial number: 14-17725
Retail Price: $2500 (1991); no longer available (2017). Approximate number of dealers: 55.