[Sasha]

Speakers that will be driven are PMC IB2, nominal impedance 4ohms.
Does the configuration changes the characteristics such as slew rate?
I am confused with reported characteristics for both 7B and 14B, sometimes slew rate is listed at 60V per microsecond, sometimes at 120V, is this the result of different configuration (serial vs. parallel)?
If so, would the configuration with slew rate of 120V result in sound being perceived as faster (better PRAT)? And if so, am I correct to say that either configuration would be suitable for my speakers, so I could go with one that has better slew rate?

[James Tanner]

Speakers that will be driven are PMC IB2, nominal impedance 4ohms.
Does the configuration changes the characteristics such as slew rate?
I am confused with reported characteristics for both 7B and 14B, sometimes slew rate is listed at 60V per microsecond, sometimes at 120V, is this the result of different configuration (serial vs. parallel)?
If so, would the configuration with slew rate of 120V result in sound being perceived as faster (better PRAT)? And if so, am I correct to say that either configuration would be suitable for my speakers, so I could go with one that has better slew rate?

Hi Sasha,

99% of the time we sell the Series version of the 7B SST as it will drive most speakers without issue.  The Parallel configuration is really only necessary when the speaker impedance is extremely low over most of it's range (1-2 ohms).

[rabpaul]

James,

What is the significance of the slew rate?
I always thought valve amps typically have lower figures until I noticed that ARC power amps even their solid state ones are 20-25V. Bryston has these at 60V and above.

[James Tanner]

James,

What is the significance of the slew rate?
I always thought valve amps typically have lower figures until I noticed that ARC power amps even their solid state ones are 20-25V. Bryston has these at 60V and above.

Hi,

The slew rate is really just an indication of the speed the circuit can work at.  It is generally considered that slew rates above about 25V per m/s does not really have much of an advantage.

james