Bottlehead Forum

Other Gear => Speakers => Topic started by: halo71 on January 28, 2015, 02:07:58 PM

Title: Polk SDA's and Foreplay
Post by: halo71 on January 28, 2015, 02:07:58 PM

So is anyone using Polk SDA's with their Foreplay's? I am new to the tube world in home audio. Have used tube guitar amps for years though. But anyways....my current set up is Polk SDA1B's, Onkyo Integra M504, Denon SACD and a stock FPII. Gotta say I am pretty happy right now. I have tried out my Infinity RSIIIa's a little and like them as well with the FP.

Title: Re: Polk SDA's and Foreplay
Post by: halo71 on January 29, 2015, 01:07:17 PM

nobody?

Title: Re: Polk SDA's and Foreplay
Post by: Grainger49 on January 30, 2015, 03:12:04 AM

The speakers depend on the power amp more than the preamp.  They must have the power to drive them properly.  The preamp, in your case a tubed Foreplay like mine, will select the input and supply the drive and voltage the power amp needs to get to a satisfying volume.  With tubes it also portrays a beautiful soundstage for your music.

As you might have found out SET tube amps do not drive low efficiency speakers well.  I don't know about your Polks but the Infinity RSIIIas do not do well with amps under 10WPC. 

Does this make sense?

Title: Re: Polk SDA's and Foreplay
Post by: halo71 on January 30, 2015, 07:37:11 AM

Perfect sense. The M504 is 165 wpc. 
The Polk's are probably a harder load to drive than the RSIIIa's. They are not "amp killers" like the Kappa series and a few others.

(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fcdn.head-fi.org%2Fa%2Fac%2Fac221916_onkyo.jpeg&hash=d7aabf9a1935ab976b14b182e3abdccb01b11825)