Amp 4 Sr6500

Systems

What amps would you run 2 the polk SR6500

Any suggestion on high end subs I'll spend $400-500 a sub
and high end amps

MacLeod

Im all about bi-amping so I say go 4 channel.

My short list would be the Polk C400.4 for its excellent crossover.

Second choice would be a Crossfire VR404 which makes over 70x4 cleanly.

I would also look at the new MTX Thunder3404 which is way underrated at 50x4.

As for a higher end amp, no question, Xtant 4.4. A very clean and underrated 50x4 with great features and unreal build quality.

Id also seriously look at the new Alpine V12's, specifically the F345.

Now if you really want to go high end then there is the Xtant X604 or the effing awesome Tru Tech T4.65!

Systems

I have 2 xtant x604's and x1001's i had 4 eclipse titaniums
but I sold them im thinkin bout buyin them back cause he hasnt used them yet

bknauss

Even if you biamp the SR6500s using the C400.4, you might want to use the external crossover. I haven't done an A/B comparison, but they are pretty good crossovers to say the least.

If you want a ton of power going to them, get the C300.2.

MacLeod

Originally posted by bknauss
Even if you biamp the SR6500s using the C400.4, you might want to use the external crossover. I haven't done an A/B comparison, but they are pretty good crossovers to say the least.

If you want a ton of power going to them, get the C300.2.

I still say bi-amping. I guarantee you I can make a speaker sound better by bi-amping than you can by straight wiring. I know cause Ive done this now on my last 2 speakers. My MM6's sound much better bi-amped than when I tried them running off my 2 channel amp.

The extreme flexibility in tuning the tweeters can make a drastic change in the speakers SQ.

That being said, I agree that the SR's x-over is gonna be pretty solid so I would have no reservations using it but with the 400.4's excellent x-over, if you did want to experiement with different settings you could.

Greg Peters

Questions...

I have two sets of db650s powered by an Alpine V12 F345 75 watts x 4 into 4 ohms, 150 watts x 4 into 2 ohms. It actually puts out 87.4 x4, and I like this amp a lot. I currently have each db650 wired to a single channel. I have a DVC 10" sub getting 400+ watts of separate V12 power as well.

I want to replace one set of db's with sr6500s ( which are less efficient than the db's that I would retain for rear fill).

To "bi amp" the sr6500 set with my current amp configuration, I could in theory wire each mid/tweeter pair in parallel to each of channels 1 + 2 from amp to outboard crossover (to present a 2 ohm load), remove jumper on crossover, and then wire up the sr6500s as per instructions for bi amping. This would compensate for lower efficiency, but would also send a lot of wattage to the tweeters (maybe too much) as well as bump THD from .3 to 1% on the front channels.

Would I be better off wiring both sr6500 driver sets bi amped with all four channels of F345 at 4 ohms (and buying a lower wattage 2-channel for rear fill), or...would it be better to wire up just the sr6500 mids onto the front channels of the V12 amp, db650s to rear channels, with the sr6500 tweeters being powered by a smaller, separate amp?

It would be a shame to harm those ring radiator tweeters by overpowering them / putting too much distortion through them- or even have them sound any less than their best.


Any thoughts?

MacLeod

First off, excellent amps. I love Alpine V12 amps!!

Second, if you want to retain your rear fill I recommend just running the SR's straight wired off the front channels. 75 watts is enough to push the SR's fine. Theyre quite sensitive and dont require much juice to get em going.

You dont bi-amp for extra power but for extra flexibility in fine tuning the output of the tweeters. That being said, the SR's are superbly tuned and you wont need as much tweaking as you would with a lesser speaker. If you still want to bi-amp you should run the tweeters off the front channels and the mids off the rear and if you want to keep the rear fill you should get a dedicated amp.

Greg Peters

MacLeod wrote:

First off, excellent amps. I love Alpine V12 amps!!

Second, if you want to retain your rear fill I recommend just running the SR's straight wired off the front channels. 75 watts is enough to push the SR's fine. Theyre quite sensitive and dont require much juice to get em going.

You dont bi-amp for extra power but for extra flexibility in fine tuning the output of the tweeters. That being said, the SR's are superbly tuned and you wont need as much tweaking as you would with a lesser speaker. If you still want to bi-amp you should run the tweeters off the front channels and the mids off the rear and if you want to keep the rear fill you should get a dedicated amp.

Thanks for your input.

I suspect the attenuation levels on the crossover for the sr6500s would be sufficient for tweaking (I like a brighter sounding tweeter, and wanted to improve on the db650s and step up to components for front stage as well).

neomagus00

hey jose, which eclipse titaniums did you have?

greg - the attentuation levels for the srs are probably enough, yep, the advantage of biamping, like mac said, is to get the spaces in between the provided settings...

MacLeod

Not only that but Polk nailed it with the SR's and theyre pretty much ready to go right out of the box so you really wont need to do too much tweaking. There is a reason those cost $750 and you definitely get what you pay for.