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About Aadams

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  1. Follow up ar-5

    I wasn't saying you don't need tweeters, merely observing wide dispersion would be of no practical benefit with low level FM background music..
  2. Follow up ar-5

    You are correct. It was a semantic error that I might have caught had I been more careful. Instead of .........."wide dispersion" not required, I should have said "no practical benefit".
  3. Follow up ar-5

    I asked the same question in this forum about 4 years ago. As I recall, the cloth woofer swap is a not a drop in replacement, crossover changes aside. The AR5 Dome Mid installed in AR2ax is a genuine woodworking project that will leave scars on you and the speaker.. . Listening to FM as background music on AR5s does not require a wide dispersion tweeter. If there is an aesthetic motive the best solution is a Chris1thisone rebuild. IMO
  4. AR 5's: The bargain AR

    My 5s are slightly less sensitive than my 3s and 58s. I am pretty confident this sensitivity difference has been mentioned, previously, by others on the forum but it is an 8 ohm speaker so you have lots of power choices. At 20 watts in your space , if you "don't crank it", listening at 6ft will give around 9 db of headroom above 85db. This headroom will be ok for all music except modern recordings of big band jazz or large scale classical which can be 15db between the softest soft to the loudest loud. Pop and rock rarely vary more than 6db in loudness. I would still recommend more watts. Adams
  5. AR 5's: The bargain AR

    IMO The AR5 is at least the equal of any AR 12 Inch 3 way system when playing the following music: Any Large scale acoustic work written before 1880 except Pipe Organ works Any small scale acoustic work that does not include a string bass playing a 41hz E All pop and rock music until 1967 when the Beatles made bass more prominent in those genres Almost all Jazz The AR 5 is superior to any AR 12 inch 3 way when reproducing solo human voice but this not easy to hear unless they are side by side with the 12 inch speaker. If your listening room is small and especially if it is small AND close to square in L&W the AR5 will be easier to live with. The AR5 is less sensitive than a 3a. If you listen at a distance of 6 to 10ft your amp should be capable of 60 watts Channel at 8 ohms to be safe on all forms of music. Again, IMO. Adams
  6. This is a quote from a JBL web site discussing speaker response measurement and actually uses the term "dispersion". The JBL of old did not even publish performance parameters. "Instead of focusing on a simple measurement such as on-axis frequency response, JBL measures systems in a field 360 degrees around the speaker and engineers the entire system to ensure off-axis response reflected to the mix position is also smooth and accurate. JBL defines the ultimate performance specification for new systems – what it will sound like in your room. At the mix position, you hear a combination of direct sound and sound reflected from the rooms surfaces. For sound arriving at the mix position to be smooth and neutral, it is not enough for a speaker to measure “flat” on-axis - it is essential the speaker have excellent off-axisperformance. While other manufacturers use a single on-axis frequency response measurement taken at one point in space, JBL measures monitor systems over a sphere that encompasses all power radiated into the listening room – in every direction. This data reflects 1296 times the information of a single on-axis response curve. Seventy-two measurements of the direct sound field, the reflected sound field, and the reverberant field, the entire sound field heard by the listener, is correlated to optimize response at the listening position. In place of spectral smoothing used by some manufacturers, which actually conceals data, the JBL approach actually exposes flaws in systems, such as resonances, poor dispersion and other causes of off-axis coloration. The data shown below is a set of spatially measured graphs that are the heart of JBL’s philosophy. " The new term is "Linear Spatial Reference" or LSR technology.
  7. This woofer frame diameter 27.9 cm is very close to Advent woofer diameter. I no longer have Large Advents so I can't measure. Would the NLA woofer hole accommodate this woofer? Does anyone here know? This is very close to mods and tweak territory.
  8. So it would need perhaps a 6db equalization slope to be flat to 32hz? You have me thinking about other possibilities. Any future questions from me on this will be in mods and tweaks.
  9. Aside from the adaptor ring would there be mods to make this woofer a useful replacement as an AR1 W in a 3 cabinet? Would it provide good performance, in your opinion, connected in a 3 cab with no mods in a bi amp config using a DSP amp to cut the Freqs above say 300hz?
  10. 3/4" dome tweeter rebuilds

    Impressive! It looks like he printed the entire cup. Is that correct? Or was it just the flange?
  11. New to me AR3

    Patience Swampfox. You will get an answer but I am almost certain you will be asked to post images of the woofer in question.
  12. I have decided to make one more post because I don't know who is actually taking this seriously and may try to do it. I have posted two additional, very important, edits into my June 30, eleven step post above, that will prove valuable to anyone who might be tempted to make one of these hybrids.
  13. I had a long post ready to go about more listening but I decided to sum it up in much shorter post. This hybrid evolved from an existing AR58 setup which can be restored at the push of a button so rather than focusing on Hybrid vs AR9 comparisons, I have spent a good bit of time listening to the original 58s system vs the Hybrid. I was questioning whether my enthusiasm was still grounded. It is. While the 58 has the big AR sound field because of the dome drivers, its weakness, as with all three-way ARs, is the 12 inch woofer having to carry the critical human voice octaves. The big difference between this hybrid stack and the 58 is the octave and a half between 200 and 700hz has been shifted to the 5 inch BA drivers and the difference clearly favors the Hybrid. This also accounts for why I think the Hybrid sounds more like an AR9. By extension I think any AR 4 way up to the 98ls would sound similar to this stack in the sweet spot but only the LST would compete in its ability to flood the listening space with music. BTW I never really listen to human voice on 3as but the same problem seems to be there as well, though the crossover is lower than with the 58s woofer. AR removed middle C (262hz) from the woofer beginning with the AR9 and all of their top systems were this way until the end.
  14. Your SA-250 will be plenty for the AR9. A second SA-250 amp is only going to add 3db of acoustic output. The AR9 manual states that 50 w/ch in a moderately live 3000 Cft room will be adequate for 107db peaks at 1 meter. 400 w/ch will get you approx. 107db peaks at 12ft. or 20db of headroom above 87. Even greater If your room has really low ambient noise. Most pop and rock music only has a 5 to 6db variation in level over the course of a recording. The biamp section of the manual gives a feeling that biamping was offered merely as an option to increase acoustic output and not a way to increase performance quality. The max recommended amp is 400 watts /ch. Page 51 of the Ref manual clearly explains the AR9 operating limits and why 400 watts is the max.
  15. From Page 33 of the AR9 Ref Manual