formica

I'd first try plugging it into a different circuit in it's current location (via an extension cord) ...as well as moving to another location and circuit. Does it hum in all the cases?

I'm surprised no mentionned the JBL Everest DD66000 ... but i'd take a set of those if anyone wanted to give them to me....

I realise that it'll greatly depend on placement, ambient noise, and preferences. I was also using a QSC in room... so I swapped out the original fan and installed one of the recommended models as per John Gordon (of QSC) recommendations. They usually use the high velocity variety because of the possible heavy pro use... but there is very low risk in installing a low velocity one for home use. The variable speed continues to function, but the fan is simply turning slower at every preset level. In my current room, I opted to install my proamp in a separate room ROb PS: At the lowest fan setting, my QSC CX was putting out about 65db at the fan mouth before the mod and 57db after. I believe you are using their studio series which should better that right from the factory...

Have you tried the Klipsch Parts dept?... their parts tend to be reasonably priced if still available.... 1-800-KLIPSCH good luck... ROb

I don't have inwalls... so perhaps my opinion isn't the one you wanted.... but the freestanding speakers will out perform the inwalls. They also have the advantage of offering a flexible placement to compensate for some room acoustic issues... which inwalls don't (especially if placed by your decorator). OTOH.... I much prefer inwalls over ceiling units as the dispersion does allow some stereo / surround imaging. They will cost you less than the regular units... so, perhaps, invest those savings into a better subwoofer. ROb

Yes, they are always on, but at a low speed. I find fans are most audible, dough, when music (or soundtracks) has a silent moment preceeded by a loud one... (amp heats up... and then suddeny there is nothing to mask the fan noise).

And one should not forget that pro-amps are fan cooled... so even though the PLX have multispeed units, they are audible in a quiet living room.

Thanks for posting all that... great work as usual.... and a wealth of information and tips (i liked the tapping down of the veneer) in there for anyone wanting to restore their Khorns. Now that it's done...is "heat lock" from "better bond" your glue of choice?

Only if you if you ignore the size of the enclosures.... as the PC25-31 is, once again, MUCH larger than the RSW-12. Sunfire subs would not exist if size weren't a deciding factor.

They are Alnico K22's that you have... 2mm x-max if a recall and comes with built in shielding. Hope that helps you find a taker... people have a more romantic view of alnico woofers than they do of "old ones".... []

Well... those are two VERY different subwoofers... so I guess it depends what you really want. Cardinal rule in subwoofer design is SIZE defines the cost/performance ratio. Both Klipsch and SVS make good subwoofers their given each's design criteria. Those two units listed are: RSW-10d = 13 x 14 x 17-1/2 = ±1.8ft3 SVS PB12= 19 x 28 x 26-1/2 = ±8.1ft3 Given that (six times larger), the SVS should offer a combination of more bass extension, output, and cost savings versus the RSW.... at the expense of being the size of a small appliance. The RSW will be easier to move around and place... as well as fit in most apartments. So one isn't better than the other... they are just very different from one another. ROb

Thanks for the heads up. That's unfortunate... must be even worse with the higher efficicency Heritage. I had looked at this unit for a secondary system... but sounds like the LMC-1 isn't suited to our Klipsch...

priceless... [] I guess your put a celeb name on it, and people will buy the magazine just "because"...

Those are probably the Alnico ones (magnet picture would confirm this)... they are leaner on the bass and had a smaller x-max... but don't require shielding for centre channel use. Some tube-rollers swear by Alnico btw... so you may be able to trade for a pair of mud magnet ones in similar condition. ROb

Pretty good example of the KISS principal... great thinking... ROb

Jubilee's (Roy's version of course) as they are the best home size speaker offering from Klipsch... and I don't already have a pair. As a side note, I haven't seen one vote for the Promedia 2.0... []

Given it's Steve's... it seems kinda fitting to have a Mater carpet... [] ... but i have to admit a weak spot for the cuties likeSally Carrera

It's looking great.... You are really on the home stretch.... have you had a chance to fire her up?

It actually is more in the audible range than that (but forget bass).... I don't have a formula, but based on basic principales we know that wavelength of sound is the distance sound travels in one full cycle (frequency in Hz) ... so using the speed of sound... Frequency = (speed of sound) / (wavelength) And, if I'm not mistaken, the limiting frequency will be that which the sound will travel through the material, hit the rigid backer, bounce back, and retravel through the material again... or in other words, twice the thickness of the material. So a 1" carpet and pad (25mm) would produce: F= (331.2m/s)/(0.05m) = 6624Hz ROb

Thanks Frank... nice to see you around... But usefull starting place when you are looking at pairing to the bigger heritage series... and maintain dynamics...

It is a nice bass... but i'm actually better looking than shavo [] Hey, you got the arms fixed, huh? (sorry, but i had to beat the others on it, and... well... i'm guessing you expected it... [] )

Here you go from a recent show...

You don't need much with only an Xmax of only 2.3mm... even if you assume that's one way (Xmax p-p would be 4.6mm) it'll probably displace under 3.5l of air. Problem with such large woofers is the actual distortion of the cone. Didn't EV have a 32" back in the 50's?

How do you know? I believe Klipsch has dropped that to 2,137 back in the mid 70's to reduce assembly times... Did you use baltic birch ply (5'x5') or cabinet birch ply (4'x8')... and what's your cut sheet look like? I should be building a pair or tops this summer as well...

When it comes to acoustic treatment... you cannot leave out which frequency range is being targeted. In general... the thicker the "treatment"... the lower the frequency cutoff that will be attenuated. So in that sense, carpet (and pad) will reduce higher frequency reflections... but little more. The cutoff will depend on the thickness of the carpet and pad mainly... and to a lesser degree, the material. Unfortunately, most rooms would benefit from some bass treatments, but this becomes difficult due to the required thickness of the material (we are talking feet and not inches) I haven't read mike's (DrWho) comments, but I'm sure they were made in reference to treating a certain acoustical problem or frequency range. ROb