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Absolutely correct, there is a bit of "bass lag". Nice to hear from you Ed.

Correction to post#23. I run them wide open (no ports blocked) which is the 20HZ tuning. Room comp is off.

I prefer co-location for the 6db increase.

Mine have the 750w bash (analog) amps. Tested with a RS analog SPL meter. I run them all wide open-20 db.
The room is flooded with bass. Phasing is correct as is polarity.
The room is so...

4 ultras = solid/tight not boom bass. Led Zep houses of the holy never sounded better.

Well...... all I can say is the system is overkill to the 10th degree. These 4 tubes thump my ears, pound my chest without any effort at all. Not cheap but I love it. Thanks SVS.

24ft x 16ft with doorways and a stairway to other rooms. They have no trouble filling the area "effortless". I got 4 so none would ever be stressed.

The room has SO MUCH bass and I'm not pushing them at all!

Thanks.

No that part is filled with furniture.

Thanks, I don't think I'll be selling any.

More than I need but all that I want :wink:

CD73 strictly redbook and sounds great.

Nice!

Check it out !!!

Would one sub out (rca) have enough signal strength to run 4 subwoofers?

I don't care much for Jolida int. amps. Their seperates are much better.

My two pc ultra 13's (purchased in 2010) still impress me as much as they did the first day .

I've owned a pair of them for some time now and would say my subwoofer needs are satisfied.

They reviewed the svs ultra 13 and gave it their extreme bass certification.:eek:

My tube preamp goes into stand-by when powered down. I can also completely shut it off by the toggle switch on the back panel. When left in "stand-by" I do not see any tube glow or feel any heat at...

Mantis has some good advice. I use (4) subwoofers of two different brands and types and it works well for me.

My 3 ported svs ultra13 is as follows: all open =20 hz 1,2, plugged =15hz,10hz. All plugged (sealed) is less than 10hz. Sealed gives the lowest frequency and lowest output.

I noticed a layer of warmth moving to a tube pre, I now want to improve that using an appropriate amp-tube combination for the mid-treble portion of my speakers.
I cant afford $$$$ speakers to...

Jolida envoy pre, budget 1k tops.Chinese,Taiwan ok