Axiom Home Page Forums General Discussion Home Theater QS8 owners what is your crossover set at?

I have Monitor Audio Silver S10 fronts and a SLCR center. I couldn't decide between the QS8 or the MA SFX surrounds so I picked up a a pair of the QS8 and SFX to compare against each other. The SFX goes down to 60hz +/-3db, so setting the crossover is easy, but the QS8 only goes down to 90hz+/-3db and then trails off -9 dbs(which is a lot) down to 65hz.

Since the QS8 has usuable sound at the +/-3 db at 90hz how do you integrate a 80hz or lower crosover without having a whole in your frequency range?

Thanks
Legairre

Ola Legairre

I use the Outlaw ICBM and set the x-over at 100 Hz for the QS8s.

I also cross over VP100 and QS8 at 100, 80 or 60 for the mains.

Some people cross over at 80 and say the hole doesn't make much difference... and they are probably right.

John,

What component do you use that allows for the multiple crossovers? Is the function in your receiver?

And 2x6,

Is the outlaw only for dvd-a and sacd? Or can it be used in DTS, DolbyPL2 and other 5.1?

2x6spds,
Thanks for the reply. Here's how I currently run my old surrounds. I have one sub directly under each surround speakers.

1.) In my pre amp I set the surrounds to "Large" so the surrounds get a full range signal. This is just like setting the fronts to large(no LFE signal).

2.) Then I use the "high pass filter" on my surround subs by using the speaker level connections(not line level). You simply run the Left pos/neg speaker wire from the pre amp to the speaker level "in" on the sub and then you run another speaker wire from the sub speaker level "out" up to the surround pos/neg and repeat the same process with right surround and sub.

3.) Then set the subs "high pass" crossosver to say 75hz(that's where my current surrounds roll off).

4.) Since the sub is getting a full range signal it's "high pass" crossover sends everything below the crossover to the sub and anything above the crossover the the surround.

This allow me to run my fronts and center crossed at 60hz and my surrounds at 70hz

It's really just a poor mans ICBM. I was hoping to not have to use the subs anymore by getting some good surrounds that went down to around 60hz , but if I keep the QS8 it looks like that won't be possible.

OK so 2x6spds uses an ICBM, how do the rest of you QS8 guys handle the 90hz limitation of the QS8? Come on I know you guys are out there and lots of you have QS8 surrounds.

2x6,

I just checked Outlaw's site ans it is only for sacd/dvd-a.

Flexible bass management is the Harman Kardon "secret sauce". The HK bass management allows mains, center, surrounds, and rears (on a 7.1) each to have a different crossover frequency. In my case I'm running a 630 but all the HK receivers (at least down/back to the 130) have this ability.

There are a couple of weaknesses in the HK bass management as well, but nothing serious :

1. There is no way to route low notes from center and surrounds to your mains if you are running "Large" mains without a sub.

2. LFE channel is low pass filtered and the LPF frequency has to be the same as one of your crossover frequencies for main, center, surrounds or rears. Not a big deal as long as you cross *something* over at 100.

I imagine any of the outboard bass management units have a similar capability, but HK is the only mfg I know of who builds it into a receiver. Could be wrong there though...

Thanks John,

I knew I liked H/K!

I suppose I could run my 60's at Large and set my X-over at 100 hz.

Can one of you please explain why there are two freq response ratings?

eg Freq Resp +/-3db (Hz ) 95 - 22kHz

Freq Resp +3dB- 9dB (Hz) 65 - 22kHz

If you use the Outlaw ICBM between the amps and processor you can control the x-over points whatever the source.

2x6,

Amps and processor (separates right?).... does that mean it can't be done with a receiver?