Audio Database
PAM-3
Commentary

This is the third KRELL preamplifier developed as the first stereo preamplifier that can be controlled with one volume while keeping the concept of pursuing sound quality with a simple design that was thoroughly pursued by PAM-2 and KRS-1.

We have completed a high-quality preamplifier by reexamining the signal path in stereo units and carefully selecting the elements and parts used.
As with PAM-2, the power supply unit is separated from the main unit and independent on the left and right.

Equipped with a tape-out selector that can dub between two types of tapes, a 1-dB-step balancer, and an MC amplifier that can directly use an MC cartridge.
The phono input can be switched between MM and MC by a switch on the board. In addition, 9 levels of 5 Ω to 1k Ω are available for MC.

In order to realize a high-quality CD input, a dedicated buffer amplifier is used separately from other high-level inputs.
In addition, the PAM-3 has a special phase correction circuit.
This system takes note of the fact that the phase between the frequencies in the audible band is disturbed by the effect of the filter inside the CD player. The phase of the connected CD player is corrected by switching 8 switches per channel provided on the board.

Model Rating
Type Stereo preamplifier
Input Terminal / Impedance Phono MM : 47k Ω
Phono MC : 5 Ω ~ 1k Ω (9-step switching)
CD : 47k Ω
Tuner, AUX, Tape1, 2 : 10k Ω
Output Terminal / Impedance Pre Out1, 2, Tape Out : 10 Ω
Total harmonic distortion factor Phono : not more than 0.01%
Tuner : 0.002% or less
Frequency characteristic 20 Hz to 20 kHz -0.005 dB (AUX to Pre Out)
Signal-to-noise ratio (IHF-A) Phono:95dB
AUX:100dB
Phono maximum allowable input (1 kHz) MM:200mV
MC:10mV
Power supply voltage 100 VAC, 50Hz/60Hz
Power consumption 15W
External dimensions Body : Width 483x Height 67x Depth 342 mm (Connector)
Power Supply : 75 mm W x 80 mm H x 228 mm D
Weight Body : Approx. 4.4 kg
Power Supply Part : Approx. 1.6 kg