ZKIT3
Portable headphone amplifier kit

This is the PARTS and CIRCUIT BOARD for our current production
Zen Head model ZH-1

The Zen Head is quickly becoming one of the best sounding portable headphone amps in the world - as evident by the threads on head-fi.org ! Now you can build one yourself without our fancy machined chassis and save some serious cash!  Kit comes with everything shown above.  You supply the 9 volt battery.


CIRCUIT BOARD

 

Based on the Burr Brown OPA2132 op amps, this kit will drive audiophile headphones between 10 ~ 600 ohms with around 50 hours of battery life.  It uses 3.5mm stereo input and output jacks. It features one of the best sounding cross feed circuits out there (this baby images!) but if you don't like cross feed you can simply turn it off. Additionally there some other switches that allow you to tweak the unit while you listen:

1) Crossfeed - on / off

2) Inter-stage gain level - hi / low
A
djusts inner dynamics - the effect is subtle

3) Input impedance - 32KOhms / 10KOhms
T
he 10K setting gives the unit lots of gain and lots of hit, ideal for IPODs etc., the 32K setting is less gain better suited for standard 2 volt outputs from your favorite CD player or DAC set up.

4) Output impedance - HiZ / LoZ
T
his can be used to best compliment the sound of your headphones.  LoZ will drive almost all headphones up to 600ohms, as will the HiZ setting.  Choose based on the best sound and performance with your phones.  NOTE: When using this as a line level preamp the unit should be sest to HiZ only.

 

 

OPA2132 DATA SHEET

 ZEN HEAD Rev 5 SCHEMATIC

 ZEN HEAD Rev 6 SCHEMATIC

ZEN HEAD OWNERS MANUAL


 KIT AFTER ASSEMBLY

 LARGE HI-RES IMAGE HERE




PARTS LIST from MOUSER.COM


Product Detail
Price
(USD)
Ext.
(USD)
Mouser #: 534-84-4
Mfr. #: 84-4
Manufacturer: Keystone Electronics
Desc.: Battery Holders, Snaps & Contacts 9V BATTERY STRAP
RoHS: RoHS Compliant

$0.45 $0.45
Mouser #: 595-OPA2132P
Mfr. #: OPA2132P
Manufacturer: Texas Instruments
Desc.: Op Amps High Speed FET-Input Oper Amplifier
RoHS: RoHS Compliant

$11.11 $22.22
Mouser #: 660-MF1/4DCT52R4702F
Mfr. #: MF1/4DCT52R4702F
Manufacturer: KOA Speer
Desc.: Metal Film Resistors - Through Hole 1/4W 47K ohm 1%
RoHS: RoHS Compliant

$0.06 $0.12
Mouser #: 660-MF1/4DCT52R2202F
Mfr. #: MF1/4DCT52R2202F
Manufacturer: KOA Speer
Desc.: Metal Film Resistors - Through Hole 1/4W 22K ohm 1%
RoHS: RoHS Compliant

$0.06 $0.12
Mouser #: 660-MF1/4DC4701F
Mfr. #: MF1/4DC4701F
Manufacturer: KOA Speer
Desc.: Metal Film Resistors - Through Hole 4.7K 1% 100PPM
RoHS: RoHS Compliant

$0.06 $0.12
Mouser #: 660-MF1/4DC3300F
Mfr. #: MF1/4DC3300F
Manufacturer: KOA Speer
Desc.: Metal Film Resistors - Through Hole 330ohm 1% 100PPM
RoHS: RoHS Compliant

$0.06 $0.12
Mouser #: 598-DMM2P22K-F
Mfr. #: DMM2P22K-F
Manufacturer: Cornell Dubilier
Desc.: Polyester Film Capacitors .22UF 250V 10%
RoHS: RoHS Compliant

$0.49 $0.98
Mouser #: 71-CCF551K00FKE36
Mfr. #: CCF551K00FKE36
Manufacturer: Vishay
Desc.: Metal Film Resistors - Through Hole 1/4watt 1Kohms 1% Rated to 1/2watt
RoHS: RoHS Compliant

$0.08 $0.16
Mouser #: 140-REA472M1EBK1632P
Mfr. #: REA472M1EBK-1632P
Manufacturer: Lelon
Desc.: Aluminum Electrolytic Capacitors - Leaded 25V 4700uF 20% 16x31.5mm
RoHS: RoHS Compliant

$1.44 $1.44
Mouser #: 140-REA331M1EBK1012P
Mfr. #: REA331M1EBK-1012P
Manufacturer: Lelon
Desc.: Aluminum Electrolytic Capacitors - Leaded 25V 330uF 20% 10X12.5mm
RoHS: RoHS Compliant

$0.19 $0.76
Mouser #: 660-MFS1/4D52R1000F
Mfr. #: MFS1/4DCT52R1000F
Manufacturer: KOA Speer
Desc.: Metal Film Resistors - Through Hole 100ohms 1% 100PPM
RoHS: In Transition

$0.09 $0.54
Mouser #: 525-EN22 This product cannot be shipped to China.
Mfr. #: EN22
Manufacturer: Energizer
Desc.: Consumer Battery 9V 550mAH SNAPS
RoHS: Not Applicable

$2.19 $2.19
Mouser #: 598-CD15ED470JO3F
Mfr. #: CD15ED470JO3F
Manufacturer: Cornell Dubilier
Desc.: Mica Capacitors 47pF 500V +/-5%
RoHS: RoHS Compliant By Exemption

$0.77 $0.77
Mouser #: 108-2UD1T1256-EV
Mfr. #: 108-2UD1T1256-EV
Manufacturer: Mountain Switch
Desc.: Toggle Switches DPDT ON-ON PC MOUNT
RoHS: RoHS Compliant

$3.27 $13.08
Mouser #: 660-CF1/4C222J
Mfr. #: CF1/4C222J
Manufacturer: KOA Speer
Desc.: Carbon Film Resistors - Through Hole 2.2Kohms 5%
RoHS: RoHS Compliant

$0.15 $0.60
Mouser #: 313-1240F-10K
Mfr. #: RV122F-20-15F-A10K
Manufacturer: Alpha (Taiwan)
Desc.: Potentiometers Audio D-Shaft 10K
RoHS: RoHS Compliant

$3.16 $3.16
Mouser #: 80-R82DC4100AA60J
Mfr. #: R82DC4100AA60J
Manufacturer: Kemet
Desc.: Polyester Film Capacitors 63volts 1uF 5%
RoHS: RoHS Compliant

$0.94 $3.76
Mouser #: 611-7201-051
Mfr. #: 7201MD9ABE
Manufacturer: C&K Components
Desc.: Toggle Switches ON-ON DPDT RA PC
RoHS: RoHS Compliant

$8.91 $8.91
Mouser #: 606-CMW01G
Mfr. #: CMW01G
Manufacturer: Chicago Miniature
Desc.: LED Circuit Board Indicators HI EFF GREEN DIFF RIGHT ANGLE
RoHS: RoHS Compliant

$0.66 $0.66
Mouser #: 806-STX-3100-3N
Mfr. #: STX-3100-3N
Manufacturer: Kycon
Desc.: Phone Connectors 3.5mm PCB STEREO BLK 3P
RoHS: RoHS Compliant

$1.02 $2.04
Mouser #: 660-MF1/4DC1003F
Mfr. #: MF1/4DC1003F
Manufacturer: KOA Speer
Desc.: Metal Film Resistors - Through Hole 100K 1% 100PPM
RoHS: RoHS Compliant

$0.06 $0.12
Mouser #: 660-MF1/4DC1002F
Mfr. #: MF1/4DC1002F
Manufacturer: KOA Speer
Desc.: Metal Film Resistors - Through Hole 10K 1% 100PPM
RoHS: RoHS Compliant

$0.06 $0.54





For additional information on availability, click on the Mouser Part #.

Note:  Some parts will become obsolete as is common with electronic parts and you may have
to find a suitable substitute.  Mouser makes this easy by showing you similar parts with the same specs.
 MERCHANDISE TOTAL:
 $63.22 (USD)

 



 


 BOARD ONLY


ZKIT3-BO

 $29.00

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Circuit board only

 


  OPTIONAL MACHINED CASE w/ Battery Holder and Blank front plate

 FRONT PANEL DRILLING TEMPLATE HERE

ZKIT3-CASE

 $45.00

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Case for ZKIT3 with blank face plate, screws and battery holder

    NOTE: This is the same case as our production unit, but done in white and with a different front panel so that there can never be any confusion between a Zen Head built by Decware and one built from a kit.

 

NOTE: if you would like this unit completely finished in our machined chassis with a lifetime warranty you can purchase our non-kit version here.

 


MADE IN USA

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 Decware products are proudly hand made in the USA by High Fidelity Engineering Co.
 Copyright 1996 ~ 2013 by Steve Deckert