Mini Report :
After living with the WalMart " Great Value " Paper rolls, nine per side, for a full week, it is now time for me to optimize the number of rolls on each side in the enclosure.
Adding or removing rolls will change the enclosure's internal volume which the entire ALTEC 515G-8HP driver works into. What IS the ideal ( sounding ) enclosure ( 825 Model ) volume, that the newly-added 515G 16 inch driver performs it's best at ???
How can this be determined??
What better way can I do it, other than to listen to various numbers of rolls, in or out, with all my KEY digital CD recordings???
My in-use audio chain is a Pioneer Elite BDP-09FP Blue Ray player, ONE 57 1/8th inch Fulton interconnect with an RCA jack on each end. The source signal goes into into my stereo 2021 HFV 6005 tube amp, with it's stereo channels paralleled. This stereo amp is mono - driving one speaker for critical evaluation in MONO, through the HFV-described TRIO speaker wiring .
Realize, I use NO means of signal attenuation. It is " full blast " at a consistent signal level, source - to amp - to speaker !!!
For the last several years, that is what I do, to develop an amp, ( or in this case, the speaker. ) I can not stand the degrade of a second interconnect and it's additional RCA jack connection degrades, let alone apply any state-of-the-art Attenuator into the chain, with it's corresponding signal degradation, to develop my own audio equipment by ear.
At " full blast ", not many CDs can be used as a listenable source. I have culled-out maybe six demanding CDs, three in-phase sources and three out-of-phase sources. I will listen to them all, with the speaker leads (TRIOS) always properly phase connected.
After this past week ( of hearing 9 rolls per side ), this weekend I will remove 2 from each side, and evaluate how 7 per side internally sounds, under dynamic conditions. No one in ALTEC-history, or in audio has likely ever done this, at least precisely as I am going about it.
Particularly doing so, with the fidelity of my " doubled-up " 2021 6005 amp ( which is tremendous ) , and TRIO speaker wires - with polarities not touching.
It is a lot of work and listening required. MANY small speaker positioning adjustments are required of me. Often only 1/32nd of an inch. And often times, even less.
A single 16 inch 515G-8HP driver was rated by ALTEC as 104 1/2 dB in my-sized A7 enclosure. With this newly undertaken internal volume optimization, it is probably even more.
It's all audible !! I am curious to determine and listen-to the final result !!! Can I get the overall balance, and mental listening involvement, to please me, with no reservations ?????? DIY audio ......... is cool.
Jeff