2. amps-preamps
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Current amp vs Voltage amp

Two different topologies with different intent. There are arguments for and against both technologies. Not having a electronics background I'm tying to get a clearer understanding.

Speaker matching including impedance and power requirements: how does one match 1:1 :: amps:speakers? General rule of Higher sensitivity benign/high impedance to tubes, and, low medium/sensitivty variable impedance to SS (considering they can be of higher power rating)?

This is not to see which is best, but to better understand the process of matching components.
deadlyvj

Showing 1 response by ct0517

ct0517's avatar
ct0517
2,041 posts
 
05-14-13: Hifigeek1
It might interest you to know that the Quad 405 current dumping solid state amp which was designed for use with the Quad 57 and later the Quad 63 actually damaged the speaker because is lacked a limiter. The amp was capable of producing to much output for either speaker. A limiter add on circuit board was designed for the 405-2 to stop the damage. Ten different iterations of clamp circuit boards were designed for the Quad 63 speaker so that when the clamp engaged, it didn't blow up the amp powering it. Quad had it right with their original QuadII amps which were tube. Quads prefer voltage amps not current amps. The Quad 57 wanted to see no more than 40 Vp-p or about 25Wrms across 8 ohms.

fwiw

I used the 405-2 with the limiter with my WPK Quad 57’s. It sounded ok. The 405 was bettered by the Music Reference RM10 which was also designed for the Quad 57’s and no fear of damaging them. Sold the 405.

Cheers.
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