Hello. I used these in a preamp I once had but have now sold. They made a huge difference in detail, sound stage and bass control. Make sure they'll fit height wise. They are 42mm tall by 21mm wide by 16mm deep. See link for more details.I accept payment via USPS Money Order only at this time. They will be shipped in a small flat rate box via USPS Priority Mail at a cost of $7. Let me know if you have any questions. More Info: https://www.bursonaudio.com/products/ss-discrete-opamp-v4/
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