Check the listing for details. Phase Linear 4000 Series II Repair and Restoration Service. Listed at 299.00 USD. You are purchasing a repair/restoration service and not the preamplifier itself. The value of these are as much as the unit itself. If a couple are found defective I can handle that. I can't however install 20 ICs (I only have a small handful left and that's to use on multiple units).
You may also like
$80
INGERSOLL RAND 19.2V Battery Rebuild SERVICE INGERSOLL RAND 2909C BATTERIES
$7.89
2x Micro USB Charging Port for Altec Lansing Mini LifeJacket 3 Bluetooth Speaker
$75
SNAP-ON CTB3124 REBUILDS REBUILDS 2.4 SANYO
$89.99
SKF CMVP40 Vibration Pen plus With Case
$49.95
Ipad Air 1, 5th Gen (2017); 6th Gen (2018) Tristar Charging IC Repair Service
$75
SNAP-ON CTB3185 BATTERIES THE BEST REBUILD SERVICE ON E BAY
$89.95
REPAIR SERVICE FOR LG 60PN5300-UF MAIN EBT62394270 - DEAD TV, NO IMAGE, NO HDMI
$45
REPAIR SERVICE 🛠 SONY DPS Board XBR-65X935D A2094368A A-2094-368-A Dead
$90
REPAIR SERVICE - Horizon / AFG Circuit Board MLH0910PD - 1 year Warranty
$550
*Repair Service* ADIXEN ACT 600 series turbo controller
$105
iPhone 12 Pro Max Cracked Glass & Screen Repair Replacement Service Please Read
$69.95
Ipad 11 11th (2025) Charging Port Repair - Fully Assembled Service - Fast