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I got to hear a $250k JBL Synthesis Demo at CEDIA 2011. They sat us down in a relatively small sound room isolated from the show floor. There were a few rows of seats but only 2 spots open in the front which we took. I was a bit concerned sitting so close to a horn loaded system. We must...

plastic baskets on the woofers, steel laminate chokes, only 3/4" thick baffles, that's a bit disappointing. However they did a great job on grill design and the front baffle from what I see. Looks like overall a lot of engineering was put into this speaker line to produce a high quality budget...

Sadly a lot of crossover issues and design implementations like speakers operating in their break up mode won't show up in a steady state frequency response sweep. This is why more elaborate measurements at various power levels and exhaustive listening tests are required to get a full picture on...

Westcott, I appreciate your contribution to this site and apologize if my responses have come off abrasive to you. The wonderful world of the internet can be quite dispassionate and impersonal at times. Subwoofers measured in a room will typically give you far more output than the +6dB...

We are measuring the sub outdoor via 2 meter groundplane first to get the most accurate response. We are then adding +6dB to those measurements to simulate the output one could expect if the sub was corner loaded in room and sitting 4 meters from the sub. This is actually how Klipsch comes up...

I'm sorry but your dead wrong about this. An In-Room measurement can NEVER be more conservative than an outdoor groundplane measurement which takes the entire room out of the equation. It's impossible to get a flat frequency response at bass frequencies in anything but an infinitely large room...

Unfortunately Tom's measurements are all done in-room so its difficult to impossible to correlate them with outdoor groundplane. We have Klipsch's latest sub offering in for testing. We don't test discontinued product. We know how Klipsch rates max output of their subs so it will be...

How do you reboot a franchise that was already recently rebooted? For once can't they chose a Spiderman with at least some masculine qualities? This movie will flop. Now bring on Batman!

At what distance was that sub measured? Are those RMS or peak #s? What brand of sub is it? I may request a review sample if its a current model and have it shipped to Josh for testing.

Dennis; Do you have LMS, Sample Champion or TrueRTA at your disposal? If so, perhaps you can retake your measurements. I too have never seen a loudspeaker measurement look like this unless lots of smoothing was applied. I experimented with the Audio Precision MLS system and it produced...

Jim builds his stuff to order and his cabinet work takes quite a lot of time. Hence why he's got some of the nicest cabinets in the industry. I'd be happy to review something like this from him in the near future however.

Cool build an extra one for me while your at it :D

My bad. I needed to take a second glance to see the graph starts at 50dB so you are correct. The graph is smoothed but it at least shows Jim voiced the speaker to be neutral. The reason he likely stopped the low end at 200Hz is b/c the measurement was taken in-room. Below 200Hz the room...

Most legitimate loudspeaker companies don't rate sensitivity that way but even still 84-87 dB is a very inefficient speaker so I don't expect these would be appropriate in anything but a small room. This is what I found when Jim sent me the 1801TL floorstanders that bottomed out at 75dB only...

Looks like a cool speaker but I wish they published an actual useful frequency response. :rolleyes: 84dB sensitivity is rather low for such a large speaker. I suspect this baby is a bit limited in dynamic output.

Great Scott!

If anyone seriously want's this logo to print, email me at: gds@audioholics.com and I will email you the EPS file just as long as you don't slap an Extreme logo on your Bose Acoustimas though :rolleyes:

The User Bass Pedestal was a direct result of the article review addendum I did on the S-520s: Usher S-520 Review Addendum Kudos to them for taking negative feedback and actually addressing it to come up with a cool product like this. I'd be curious to hear everyone's opinions as to how the...

I believe the DSP is very limited on these subs. It's just an adjustable Q filter which you can use in conjunction with auto correction systems prior to running auto setup as I suggest in the following article: Home Theater Multiple Subwoofer Setup Guide

By using the Bass Management of your A/V receiver in conjunction with the LPF of the subwoofer, you are in a sense cascading crossovers. If they happen to share the same -3dB point, this can lead to excessive attenuation at or below the crossover frequency and/or cause phase issues at the...