Description Price (USD) Quantity Notes
Mini³ headphone amplifier printed circuit board and accessories
$10.00each
3 channels onboard Includes 3 ferrite beads and 1 set of battery contacts
M³ headphone amplifier printed circuit board
$21.00each
3 channels onboard
β22 amplifier printed circuit board
$12.00each
1 channel onboard
ε22 backplane printed circuit board
$35.00each
For 3-channel active-ground β22 amp
σ11 single-rail regulated power supply printed circuit board
$10.00each
PSU for M³ and others
σ22 dual-rail regulated power supply printed circuit board
$12.00each
PSU for β22 and others
CK²III (Cavalli-Kan Kumisa III) headphone amplifier printed circuit board
$12.00each
2 channels + PSU onboard
ε24 power switch driver printed circuit board New!
$9.00each
σ24 power transformer printed circuit board New!
$5.00each
companion to ε24
ε12 muting / protect printed circuit board for headphone amps
$8.00each
ε27 volume pot mounting board for Alps RK27 stereo potentiometer New!
$5.00each
Also compatible with Noble AP25 stereo pot
JISBOS buffer amplifier printed circuit board
$5.00each
1 channel onboard
Mini³ pre-drilled and engraved aluminum panels, front and rear
$40.00set
1 set needed per Mini³ amp Fabricated to order Lead-time 12 business days
Aavid-Thermalloy 531102B00000 1.5" extruded TO-220 heatsink (10.4°C/W)
$1.50each
6 needed per M³ board
Aavid-Thermalloy 529802B00000 1.5" extruded TO-220 heatsink (3.7°C/W)
$2.00each
4 needed per β22 board 4 needed per σ22 board 2 needed per σ11 board
International Rectifier IRFZ24N / IRF9Z34N power MOSFET, tested complementary pair (TO-220)
$3.50pair
2 pairs needed per β22 board 2 pairs needed per σ22 board 3 pairs needed per M³ board.
International Rectifier IRLZ24N power MOSFET, tested pair (TO-220)
$3.50pair
1 pair needed per σ11 board 1 needed per ε24 board
2N5486 N-channel JFET (TO-92), tested pair for M³ cascode current source
$0.50pair
3 pairs needed per M³ board Not matched for Idss as it is not necessary
2N5484 N-channel JFET (TO-92), tested pair for M³ capacitance multiplier
$0.50pair
1 pair needed per M³ board Not matched for Idss as it is not necessary
2SK170BL N-channel low noise JFET (TO-92)
$2.10each
2 needed per β22 board 2 needed per CK²III board 2 needed for two JISBOS boards See below for Idss matching service
2SJ74BL P-channel low noise JFET (TO-92)
$2.10each
2 needed per β22 board 2 needed per CK²III board 2 needed for two JISBOS boards See below for Idss matching service
Matching service for two 2SK170BL and two 2SJ74BL (JFETs not included)
$4.00quad
Idss matched to within 0.5mA 1 quad needed per β22 board 1 quad needed per CK²III board 1 quad needed for two JISBOS boards
PN4392 N-channel JFET (TO-92), tested pair for β22 output cascode
$0.50pair
1 pair needed per β22 board Not matched for Idss as it is not necessary
Central Semiconductor 1N5291 0.56mA current regulator diode (DO-35)
$1.86each
8 needed per β22 board
BC546B NPN 65V small signal transistor (TO-92)
$0.20each
6 needed per σ22 board 3 needed per σ11 board
BC556B PNP 65V small signal transistor (TO-92)
$0.20each
6 needed per σ22 board 3 needed per σ11 board
BC550C NPN 45V small signal transistor (TO-92)
$0.20each
8 needed per β22 board 10 needed per CK²III board 2 needed per JISBOS board
BC560C PNP 45V small signal transistor (TO-92)
$0.20each
8 needed per β22 board 8 needed per CK²III board 1 needed per JISBOS board
Vishay-Siliconix J503 0.56mA current regulator diode TO-92)
$1.86each
Remaining stock for part replacement only. New builds please use 1N5291 Limited quantities available
Texas Instruments TLE2426CLP virtual ground rail splitter chip (TO-92)
$1.30each
1 needed per M³ board 1 needed per Mini³ board
BZX55C12 12V 500mW low noise zener diode (DO-35)
$0.10each
8 needed per β22 board 1 needed per σ22 board (certain output voltages) 1 needed per σ11 board (certain output voltages) 1 needed per Mini³ board
Wima MKS2 1µF 63V MKS film capacitor
$0.80each
Alternative to the Vishay-BC MKT below Limited quantities available
Vishay-BC MKT370 1µF 63V MKT film capacitor
$0.45each
7 needed per β22 board 4 needed per σ22 board 2 needed per σ11 board 13 needed per M³ board 1 needed per ε12 board 1 needed per JISBOS board
DC power jack, 2.5mm center pin, PCB-mount, Kycon KLDX-0202-B (or similar)
$0.40each
1 needed per Mini³ board
3.5mm stereo mini phone jack, isolated, PCB-mount, CUI SJ1-3533NG
$0.60each
2 needed per Mini³ board
Alps RK0971221Z05 miniature stereo potentiometer with SPST switch, 10KΩ
$3.25each
1 needed per Mini³ board For portable amplifier volume and power
Alps RK27112A "blue velvet" premium stereo potentiometer, 50KΩ
$16.00each
1 needed for β22, M³ or CK²III volume control, 1 more for M³ bass boost. ε27 PCB recommended for β22 and CK²III
Analog Devices AD8397ARDZ rail-to-rail high output current dual opamp (SOIC-8 with E-pad)
$4.90each
1 needed per Mini³ board "high performance"
TI/Burr-Brown OPA690ID wideband high output current opamp (SOIC-8)
$2.70each
1 needed per Mini³ board "high performance"
National Semiconductor LMH6642MA rail-to-rail low-power opamp (SOIC-8)
$1.90each
1 needed per Mini³ board "extended runtime"
National Semiconductor LMH6643MA rail-to-rail low-power dual opamp (SOIC-8)
$1.90each
1 needed per Mini³ board "extended runtime"