SPECIFICATIONS

All Presence Amplifier Models

TOPOLOGY All vacuum tube signal path.
INPUT SENSITIVITY 1.5 volts rms for full output.
INPUT IMPEDANCE 100,000 ohms, DC coupled.
FREQUENCY RESPONSE @ 1 Watt 0 - .2 db 20 - 20 kHz
+/-0.5 db 3 Hz to >20 kHz; -3 db @ 65 kHz.
POWER OUTPUT
MONOBLOCK

STEREO (1/2 per channel)

P400 REFERENCE
2 ohm load- 240 watts, 12 Hz to 20 kHz.
4 ohm - 280 watts, 16Hz to 30 kHz.
8 ohm load- 180 watts, 20 Hz to 30 kHz.

6 - 8 ohms, 350 - 400 Watts, 20 Hz - 30 kHz.
DISTORTION  
THD FULL POWER
Typical @ Rated Load
Less than 0.01% midband
0.025% @ 20 Hz
0.1% - 0.2% Max @ 20kHz
IM 60/7000 Hz, less than 0.02%.
TIM Unmeasurable
OVERLOAD CHARACTERISTICS Soft clipping with instantaneous recovery.
SIGNAL TO NOISE RATIO 95 - 100 db
@ Full Power Reference.
RISE TIME 5 microseconds, any level at Rated Load.
SLEW RATE No limitation other than rise time.
DAMPING FACTOR Over 500, 30-5000Hz.
POWER CONSUMPTION
Idling or Small Signal


Max. Continuous Power
Stereo or Single Monoblock
380 Watts / 3.2 Amps @ 120 V
P400 Reference 432 Watts / 3.6 Amps

Stereo & Single Monoblock 6 Amps
P400 Reference 9 Amps
FRONT PANEL CONTROLS
& DISPLAYS
(All Models)
POWER ON, DAMPING Three Position Frequency Range Switch, MIN-MAX LEVEL Knob

8 LED Output Tube OUTOBIASING STATUS
1 LED WARM-UP indicator
1 LED READY indicator

BACK PANEL FEATURES
MONOBLOCKS











STEREO

AC LINE, IEC 320 RECEPTACLE
FUSE HOLDER and MAINS VOLTAGE SWITCH for
100, 120, 220, 240 Volts 50 - 60 Hz.

INPUT: "CARDIS" Gold Plated RCA & XLR Connectors

OUTPUT: 2 Sets "CARDIS" Gold Plated BINDING POSTS (Paralleled)

ON/OFF INPUT SWITCH


DUAL INPUTS & SWITCHES
SINGLE SET OUTPUTS / CHANNEL
TUBE COMPLEMENT

6GW8 / ECL86, 2 ea. Mono, 4 ea. Stereo
6922, 2 ea. Mono, 4 ea. Stereo
8 ea. EL34 or 8 ea. 6550, P-400 Reference

SIZE AND WEIGHT 10 1/2" H x 17 1/2" W x 15 1/2" D,
60 lbs net weight.
PRICE

P280-S Stereo (Dual 140 watt)

P280-M Monoblock (280 watt)


P400 REFERENCE Monoblock


$6,695 Brushed Aluminum Trim

$11,279 per pair, Brushed Aluminum Trim
$11,589 14 Karat Gold Plated Trim

$13,338 per Pair, Brushed Aluminum Trim
$13,699 per Pair, 14 Karat Gold Plated Trim