New to me SRS 2s
Comments
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One of the worst performing amps I've heard had a damping factor of 1000.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
The ideal motion of a woofer's cone would be to move outward exactly as driven by the positive part of the electrical signal, then stop precisely when the positive portion of the electrical signal reaches its peak. Then it would begin returning to the rest position when the positive and negative portion of the signal is null and then begin the inward portion of its movement corresponding to the negative part of the signal. However, since the woofer cone has mass it is influenced by inertia, it wants to continue moving outward past the peak of the signal both during the forward and rearward part of its journey.
One of the ways to reduce this overhang effect is to short out the woofer's voice coil between the musical signal. If a quick moving wire could be placed between the woofer's terminals exactly when the driving audio signal were at the zero point the woofer would tend to not overdrive itself. The next time you have a woofer outside of the cabinet and crossover gently push on the woofer's cone. Then take an alligator clip lead and place it across the woofer's terminals. Again push on the cone and you will find it a bit stiffer to move since the shorted voice coil causes a braking action against the coil in the woofer's magnetic field. Think of it as magnetic braking. There are some speakers that are shipped with shorting wires across the terminals to prevent excessive cone movement.
Well, this is exactly what the amplifier's low impedance does, it acts as a short whenever there is no audio signal being produced. The woofer thinks it's being shorted out whenever there isn't a positive or negative audio signal for it to respond to. As to how much of this braking action is sufficient to minimize overhang in a woofer depends upon lots of variables. How much does the woofer's cone weigh? What is the voice coil and permanent magnet's relationship to the electromotive force propelling it? What about the surround structure, how will it effect the cone's movement? Is the enclosure sealed or vented? Is there a passive radiator also moving? What is the air-speed of an unladen swallow? -
Is this why a 6502's lower midrange sounds better than a 6511's when substituted in the SDA slot?
EDIT: great read while eating a turkey sandwich.Don't take experimental gene therapies from known eugenicists. -
One of the worst performing amps I've heard had a damping factor of 1000.
Hegel, Benchmark....?
Jesse,
You should hear these overhauled Phase Linear amps after being WOPL'd... what's your favorite beverage for my demo?
What's left of the original is the case, trans, meters and heatsinks.
The specs after WOPL'd are incredible and the sound is well, I'd put it up against most amps. -
2 channel: MXN10, Anthem MRX740, Anthem MCA5, SDA1c recap/RDO, JL Fathom F112V2, Tributaries series 8A, Tara labs RSC
Theater: Above plus Paradigm reference studio 100, Polk FX300i
Projects: SRS1.2TL, SRS 2, M5Jr+
Party/1st floor: iPad, Marantz SR5005, Paradigm reference S100v2, monster bulk cable
B&O H9 Gen3 -
Like the spikes. Stachybotrys, not so much.Don't take experimental gene therapies from known eugenicists.
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Bunch of pictures from the SRS2 build, we are getting them finished this week.
I think we managed to repair the MW155, the plan used was a bunch of the recommended craft glue and a very long/thin curved neck bottle normally used to dispense oil/vinegar/whatever at hibachi cooktops.
That allowed us to reach the entire perimeter of the foam cone and re-glue it to the surround, it was left on a quad stack of towels to leave pressure on the whole stack with about 2 lb on top of the washer bolt via a socket to distribute the load evenly.
I forgot to take a picture of that step but end result is passable, the compliance of the overall PR isn't perfect/it doesn't move quite as freely as the other one but I don't really have another option right now.
Every driver had dynamatt added, magnets were glued, all the normal mods etc etc...
The VR3 crossovers are in the SRS2s and I should be getting the commander series set for the 1.2TLs shortly.
2 channel: MXN10, Anthem MRX740, Anthem MCA5, SDA1c recap/RDO, JL Fathom F112V2, Tributaries series 8A, Tara labs RSC
Theater: Above plus Paradigm reference studio 100, Polk FX300i
Projects: SRS1.2TL, SRS 2, M5Jr+
Party/1st floor: iPad, Marantz SR5005, Paradigm reference S100v2, monster bulk cable
B&O H9 Gen3 -
Like the spikes. Stachybotrys, not so much.
Funny enough it's just paint on that one panel, I also thought it was mold at first but someone just over sprayed badly at the factory!2 channel: MXN10, Anthem MRX740, Anthem MCA5, SDA1c recap/RDO, JL Fathom F112V2, Tributaries series 8A, Tara labs RSC
Theater: Above plus Paradigm reference studio 100, Polk FX300i
Projects: SRS1.2TL, SRS 2, M5Jr+
Party/1st floor: iPad, Marantz SR5005, Paradigm reference S100v2, monster bulk cable
B&O H9 Gen3 -
Striker2237 wrote: »
Good deal. Sure looks exactly like the propagation pattern of S. Chartarum. I like the bracing in those too.
Don't take experimental gene therapies from known eugenicists. -
Striker2237 wrote: »
Good deal. Sure looks exactly like the propagation pattern of S. Chartarum. I like the bracing in those too.
I thought the same thing when I opened these, even it is mold it's been locked in there since 1980 and I did check to see if it flakes etc. Really seems like paint to me....
The bracing is nice, I agree with that but man it took a lot of time and powergrab to get all the seams lined!
2 channel: MXN10, Anthem MRX740, Anthem MCA5, SDA1c recap/RDO, JL Fathom F112V2, Tributaries series 8A, Tara labs RSC
Theater: Above plus Paradigm reference studio 100, Polk FX300i
Projects: SRS1.2TL, SRS 2, M5Jr+
Party/1st floor: iPad, Marantz SR5005, Paradigm reference S100v2, monster bulk cable
B&O H9 Gen3 -
Striker2237 wrote: »Striker2237 wrote: »
Good deal. Sure looks exactly like the propagation pattern of S. Chartarum. I like the bracing in those too.
I thought the same thing when I opened these, even it is mold it's been locked in there since 1980 and I did check to see if it flakes etc. Really seems like paint to me....
The bracing is nice, I agree with that but man it took a lot of time and powergrab to get all the seams lined!
Im skiddish and would have to Kilz the interior lol. Looking good. Now you need a set of these to match those spikes...
Don't take experimental gene therapies from known eugenicists. -
Striker2237 wrote: »Striker2237 wrote: »
Good deal. Sure looks exactly like the propagation pattern of S. Chartarum. I like the bracing in those too.
I thought the same thing when I opened these, even it is mold it's been locked in there since 1980 and I did check to see if it flakes etc. Really seems like paint to me....
The bracing is nice, I agree with that but man it took a lot of time and powergrab to get all the seams lined!
Im skiddish and would have to Kilz the interior lol. Looking good. Now you need a set of these to match those spikes...
I may need a set indeed, do they come in black?2 channel: MXN10, Anthem MRX740, Anthem MCA5, SDA1c recap/RDO, JL Fathom F112V2, Tributaries series 8A, Tara labs RSC
Theater: Above plus Paradigm reference studio 100, Polk FX300i
Projects: SRS1.2TL, SRS 2, M5Jr+
Party/1st floor: iPad, Marantz SR5005, Paradigm reference S100v2, monster bulk cable
B&O H9 Gen3 -
They do if you have them anodized.
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I like flat black Rustoleum.Don't take experimental gene therapies from known eugenicists.
