Vintage / Audio Research SP-4 // Stereo Preamplifier
The Audio Research SP-4 is a vintage solid-state preamplifier that represented a departure for Audio Research in the late 1970s, as it was one of their first non-tube designs. Known primarily for their tube gear, Audio Research took a chance by venturing into solid-state territory with the SP-4. While it may not hold the same legendary status as their tube-based designs, the SP-4 was still a significant player during its time, offering the company's signature focus on sound quality and build precision.
- Replaced shorted capacitors C46, C47, C48, C49
- Cleaned control contacts
- Tested all inputs
- This unit does not have the Head Amp input option
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Audio Research SP-4 is a vintage solid-state preamplifier that represented a departure for Audio Research in the late 1970s, as it was one of their first non-tube designs. Known primarily for their tube gear, Audio Research took a chance by venturing into solid-state territory with the SP-4. While it may not hold the same legendary status as their tube-based designs, the SP-4 was still a significant player during its time, offering the company's signature focus on sound quality and build precision.
- Replaced shorted capacitors C46, C47, C48, C49
- Cleaned control contacts
- Tested all inputs
- This unit does not have the Head Amp input option
