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- New large advent speaker repair guide drivers#
- New large advent speaker repair guide manual#
- New large advent speaker repair guide pro#
This almost magically transforms the overall response to a flat one in-room:Īlas, we know that such a response subjectively sounds bright. I was pleasantly surprised how smooth the early reflections are: That then screws up some of the tweeter response. Near-field response shows a very slow response for the woofer in crossover region: This so called spinorama shows us just about everything we need to know about the speaker with respect to tonality and some flaws:īass response is deficient and we have good bit of variations but not as bad as I had expected. I picked the middle position (red below) in the switch that is marked as "decrease" for high frequencies based on my setup measurements (and later confirmed by Dennis):Īcoustic measurements can be grouped in a way that can be perceptually analyzed to determine how good a speaker is and how it can be used in a room. I think I was a bit to the right of the tweeter. Reference axis was the tweeter center or as best I could determine through the grill. I performed over 1000 measurement which resulted in error rate of about 1%. In a nutshell, the measurements show the actual sound coming out of the speaker independent of the room. Both of these factors enable testing in ordinary rooms yet results that can be more accurate than an anechoic chamber. It also measures the speaker at close distance ("near-field") which sharply reduces the impact of room noise. This is a robotic measurement system that analyzes the speaker all around and is able (using advanced mathematics and dual scan) to subtract room reflections (so where I measure it doesn't matter).
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Measurements that you are about to see were performed using the Klippel Near-field Scanner (NFS). Interesting that it didn't have this negative stigma then.įascinating that its max power rating was just 15 watts! I fed it a lot more than that. It is horrible material and seemingly falls apart by just looking at it. There is also this bit of advertising about it:Īs a woodworker, I detest particle board. It is written as if it is an article for a hi-fi magazine! It is very boastful of its design approach without appearing too arrogant.
New large advent speaker repair guide manual#
There is a site with a copy of the manual which I highly recommend to check out: I measured the difference as you will see later. Story is that this was to adjust for lack of uniformity of the recordings of the era and not to tune the speaker. I didn't take a picture of the back side but there is a 3-way switch to adjust the high frequencies. This speaker is in reasonably good shape seeing how it is made out of fragile particle board: The woofer has been professionally reconed. He has looked it over and replaced a crossover capacitor to make sure it has the value it originally had. The sample under test was kindly provided by our own Murphy. This is a review and detailed measurements of the "The New Advent Loudspeaker" vintage speaker, circa 1977. Maybe a little too revealing, albeit great for editing.
New large advent speaker repair guide pro#
Mind you, my default monitor was a pair of Stax Lambda Pro earspeakers. It was obvious that there was confusion/blurring with female vocals with the Advents. There were multiple systems to check out the sound of recordings, one happened to use a pair of Large, walnut veneered, Advents. I was working on several projects involving women's and girls chorus. So there's lots of confusion in the frequency range that coincides with female vocals.
New large advent speaker repair guide drivers#
The crossover problem is that there's too much crossing over of each driver and the two drivers predictably don't sound similar. $1000 a pair for speakers was real money back in 1978, haven't seen powered Advents for decades, but the passive versions of the Large Advent are still floating around. In fact, that problem was directly addressed with the Powered Advents with very good results, at least sonically. The trouble with the Advents is the crossover. I'm not sure my second pair of Advents were the originals, the treble of that pair was anodyne, one of the speakers least obnoxious features. Thanks, maybe I'll look at the 1976 and earlier audio magazines.