SAE Mark XXXIB

Back when big silver faceplates and massive meters ruled the world, SAE (Scientific Audio Electronics) was pushing the edge of American hi-fi. The Mark XXXIB is a perfect example of why the brand still carries weight among vintage collectors: a solid, muscular power amplifier that looked like it belonged in a lab but played with the kind of authority that filled living rooms with life.

Rated at 50 watts per channel into 8 ohms, the Mark XXXIB isn’t just about raw power, it delivers a clean, wide-bandwidth signal with headroom to spare. The dual illuminated VU meters give it that unmistakable ‘70s vibe, while inside, SAE’s no-nonsense engineering ensures stability, low distortion, and drive for even tough speaker loads. 

Echo Price $175.00
Retail Price
Echo Price $175.00
Condition: 8/10

Return Policy

We offer a 3-day return window on all purchases. Returns made to a credit or debit card will incur a 5 percent processing fee. Shipping costs, both to and from, are the responsibility of the customer if applicable.

After the 3-day window and up to 3 weeks from the date of purchase, items may still be returned, subject to a 20 percent restocking fee.

For shipped orders, customers must notify us within 3 days of receiving the item to initiate a return. Once the item is received back in the same condition it was sent, we will issue a refund minus all shipping charges and a 5 percent credit card processing fee.

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Echo Price $175.00
Retail Price
Echo Price $175.00
Condition: 8/10

Back when big silver faceplates and massive meters ruled the world, SAE (Scientific Audio Electronics) was pushing the edge of American hi-fi. The Mark XXXIB is a perfect example of why the brand still carries weight among vintage collectors: a solid, muscular power amplifier that looked like it belonged in a lab but played with the kind of authority that filled living rooms with life.

Rated at 50 watts per channel into 8 ohms, the Mark XXXIB isn’t just about raw power, it delivers a clean, wide-bandwidth signal with headroom to spare. The dual illuminated VU meters give it that unmistakable ‘70s vibe, while inside, SAE’s no-nonsense engineering ensures stability, low distortion, and drive for even tough speaker loads.