toddalin
12-01-2016, 12:39 PM
While I'm having the woofers refoamed, I thought I would snap and share a few pics of what went into my modified L200 cabinets and the new modifications.
In the past I cut the cabinets for the longer L300 horns and 2405 slot tweeters and made new crossovers with Theta by-pass caps. Through much listening, coupled with the RTA, I came to the same conclusions as Nelson Pass, (but before Nelson did) that in the home setting, we want to make the horn a bit warmer and increased the caps to the mids accordingly. Also, my three 2420s (L/C/R) all have the early tangential diaphragms for their warmer sound. The tweeter circuit was also simplified a bit and I let it go a bit lower (0.5 mH) to compensate for the tangential diaphragms.
The bottoms of the cabinets were cut out and the cabinets raised with new bottoms for better speaker placement relative to the ear/floor bounce and more interior volume. In this go-round, I've increased the length of the two ports from ~7.25" to ~9.75" and they are now internally flared. The original ports were designed for the LE15 and not the 2235. In the past I had one closed, but that tuned the cabinets to low. This compensates for the difference and leaves a bit over 4" to the back of the cabinet.
http://www.audioheritage.org/photopost/data//500/medium/DSC_0031.JPG
Note the spray on rubber coating on the horns to deaden any ringing.
http://www.audioheritage.org/photopost/data//500/medium/DSC_0025.JPG
All 12 gauge wiring.
http://www.audioheritage.org/photopost/data//500/medium/DSC_0026.JPG
Lots of "tweaking" went into these.
http://www.audioheritage.org/photopost/data//500/medium/DSC_0020.JPG
http://www.audioheritage.org/photopost/data//500/medium/DSC_0022.JPG
In the past I cut the cabinets for the longer L300 horns and 2405 slot tweeters and made new crossovers with Theta by-pass caps. Through much listening, coupled with the RTA, I came to the same conclusions as Nelson Pass, (but before Nelson did) that in the home setting, we want to make the horn a bit warmer and increased the caps to the mids accordingly. Also, my three 2420s (L/C/R) all have the early tangential diaphragms for their warmer sound. The tweeter circuit was also simplified a bit and I let it go a bit lower (0.5 mH) to compensate for the tangential diaphragms.
The bottoms of the cabinets were cut out and the cabinets raised with new bottoms for better speaker placement relative to the ear/floor bounce and more interior volume. In this go-round, I've increased the length of the two ports from ~7.25" to ~9.75" and they are now internally flared. The original ports were designed for the LE15 and not the 2235. In the past I had one closed, but that tuned the cabinets to low. This compensates for the difference and leaves a bit over 4" to the back of the cabinet.
http://www.audioheritage.org/photopost/data//500/medium/DSC_0031.JPG
Note the spray on rubber coating on the horns to deaden any ringing.
http://www.audioheritage.org/photopost/data//500/medium/DSC_0025.JPG
All 12 gauge wiring.
http://www.audioheritage.org/photopost/data//500/medium/DSC_0026.JPG
Lots of "tweaking" went into these.
http://www.audioheritage.org/photopost/data//500/medium/DSC_0020.JPG
http://www.audioheritage.org/photopost/data//500/medium/DSC_0022.JPG