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Express interest in a variant of the Altec Model 19 crossover I developed nearly three years ago has motivated me to build up a pair. It was originally posted on Lansing Heritage Forum here...

Noting expanded horizontal and vertical scales, compare LF response to other vintage acoustic suspension speakers measured here: http://www.audiokarma.org/forums/showthread.php?p=2979087#post2979087 HF measurement axis midway between mid and tweet @ ~20° off-axis, HF controls set +2 dB...

On tweeter axis: Nearfield Bass: Compare w/other East Coast designs here, noting expanded vertical scale: http://www.audiokarma.org/forums/showthread.php?p=2979087#post2979087 Vertical Polar Map +/- 20°:

http://www.diyaudio.com/forums/multi-way/159151-ikea-spherical-speakers-first-build-done.html

AK Design Collaborative - Karma Insubnia ******** Member Projects: http://www.audiokarma.org/forums/showthread.php?p=3592561#post3592561 ******** AVS forum is all worked up over the $1000 Danley DTS-10 kit: http://www.avsforum.com/avs-vb/showthread.php?t=1189404 AKer...

KLH-6 - Measurements - Model Six Early integral-woofer pair; no high frequency output. Nearfield bass measurement, mic 1/4" in front of grille, Red, Grn: Compare KLH-17, Blu, Cyn: And AR4x, Vio, Org: Cambridge Sound Works Model 6 pair, Gry: Original Large...

Can YOU pick the finalists and winner from the measurements (two pages)? :scratch2: http://www.stereomojo.com/Small%20Speaker%20Shootout%202007/StereomojoSmallSpeakerShootout2007Measurements.htm The conditions and the contenders...

Incoming: http://www.stereophile.com/historical/506advent/index.html

Cambridge SoundWorks Model Six by Henry Kloss "The fullness of the sound, a function of mid-bass rather than low bass, is greater with the speakers against a wall than with them out in the room." "The mid-bass and mid-range balance of Model Six loudspeakers, which are somewhat...

No tweeter in one, and its woofer's open, so I installed a JBL 116H, instead, Blue, which balances better with the stock tweeter. With nearfield LF response of the JBL normalized -1.8 dB at 500 Hz, it still plays lower frequencies with more SPL, and reaches 2 Hz lower than the stock woofer...

Incoming unit #2 has the original NPE caps, but the pots have been "upgraded" with L-pads: Measurements on tweeter axis and midline, no attenuation, i.e., as if the mid and tweeter pots have been removed: Added the 25-Ohm resistors across the drivers as recommended by RoyC at CSP...

A tube active crossover, apparently; do we know anything? :dunno: http://www.audiokarma.org/forums/showthread.php?p=2520490#post2520490

Can anyone offer up some expertise regarding issues related to out-of-band loading of tube amps in biamp applications over here in the Speakers Forum, please? http://audiokarma.org/forums/showthread.php?p=2429389#post2429389

********** Mod Summary: http://www.audiokarma.org/forums/showthread.php?p=3671070#post3671070 Before vs. After frequency response: ********** Baseline, unopened: Including woofer on-axis nearfield 1/8" in front of grille, -32 dB: Compare to Murphy's results here...

Submit Q's and A's here, please. A's can be or include links to informative discussions in this forum. :yes: 1) How come I keep blowing tweeters? http://www.jblpro.com/catalog/support/getfile.aspx?docid=246&doctype=3 2) Sealed or ported...

.... :music:

Impressed with the bass performance of PE's Dayton DA175-8 aluminum-cone woofer in Indignia, I wonder how good a TCB (Triple Chamber Bandpass) sub might be made with them: http://audioheritage.org/vbulletin/showthread.php?t=6289 JBL made a half-dozen versions of these before a threatened...

Klh 17 - Seventeen

Incoming original large Advent Loudspeakers: :scratch2:

http://www.youtube.com/watch?v=xe-phE223vM http://www.youtube.com/watch?v=z2LQJ23KWbw&feature=related http://www.youtube.com/watch?v=0AdPZFaBpn0&feature=related

Dynaco A-25 vs. XL Member Wiredbecker requested that I measure his A25s and XLs for comparison. Here are the results: 1) Baseline - A25s on tweeter axis, stock, before recap: 2) A25 at 30°. 3) A25 attenuation switch adjustability. 4) A25 LF nearfield bass response...

Sunday fun at Zilchlab -- Baby Advent II, B&W DM305, and JBL Northridge E30: Details:

******** Member Projects: http://www.audiokarma.org/forums/showpost.php?p=1801462&postcount=2 Project design: Project Parts List and Crossover Schematic: http://www.audiokarma.org/forums/showthread.php?p=1951281#post1951281 Crossover Layout and Frequency Response...

******** Project Summary: http://audiokarma.org/forums/showthread.php?p=1856214#post1856214 Member Projects and Acknowledgments: http://audiokarma.org/forums/showthread.php?p=2260584#post2260584 Member Listening Impressions...