Jump to content

sundownz

Vendors
  • Content Count

    8,101
  • Joined

  • Last visited

  • Days Won

    7

Everything posted by sundownz

  1. sundownz

    New Bench Power Supply Setup

    We don't test that kind of power on the bench - as was mentioned I'd do that in my vehicle. We also have a battery bank to back up short period high power testing.
  2. sundownz

    4 SA-8's: AQX2500.1 or AP30001D?

    All newer SA-8s also feature the bolted down spider.
  3. sundownz

    New Bench Power Supply Setup

    My Dad came in and installed the 240v panel for us (he was an electrician for 20+ years) -- each supply has it's own breaker. Brandon did all of the wiring on the board for the supplies themselves. Quite a bit of work in the whole deal but will make testing alot easier
  4. sundownz

    From: Used, B-Stock, Refurbished Amps, and MISC

    Poor cosmetic quality used amps would likely be repaired under warranty rather than replaced -- it would go to dB-R for the repair as they handle all of our work.
  5. sundownz

    Nightshade v.2 vs. Z v.2

    The NS v.2 is 2000-watts RMS.
  6. sundownz

    Sundown SA-15 Pre-Order

    Hmmm... good question I shipped the prototype to Russia so I'll have to mock up a basket on a motor when I get a chance and measure it all.
  7. sundownz

    Sundown SA-15 Pre-Order

    I don't see much reason to tune under 35 Hz in vehicle due to transfer function -- but you could tune them down to 20 Hz if you really wanted.
  8. sundownz

    New Stuff for Sundown coming soon !

    Initial un-broken in specs on the SPL D2 coil indicate about 25% higher BL^2/RE -- the glue isn't dry so I can't measure it broken in yet... will do so tomorrow and confirm that it is that much higher.
  9. sundownz

    8 SA10's walled in Tonka's S10!

    Good stuff !
  10. sundownz

    New Stuff for Sundown coming soon !

    I am a little busy with the items mentioned in this post -- but later I will work on other things.
  11. sundownz

    New Stuff for Sundown coming soon !

    I'll have pre-ordering for SA-15 and E8 v.2 opening up shortly for those waiting. Ironing out all the final details on production.
  12. sundownz

    New Stuff for Sundown coming soon !

    Bit more on the SPL coil for NS v.2... here is a comparison of spec : Dual-1 "standard" Coil : WW = 71 mm ID = 76.3 mm OD = 83.8 mm DCR = 0.95 per side Inner Gap = 1.15 mm Outer Gap = 1.35 mm Dual-1 "SPL" Coil : WW = 57 mm ID = 75.5 mm OD = 84.5 mm DCR = 0.8 per side Inner Gap = 0.75 mm Outer Gap = 1.0 mm So we have 0.75 mm more coil thickness in the gap and a lower DCR for SPL burp purposes. I'll do spec comparisons once they arrive... sample D1 versions shipped today so I should have them soon.
  13. sundownz

    New Stuff for Sundown coming soon !

    Almost forgot... E8 v.2 will be available around year end too : E8 v.2 Prototype - Car Audio Classifieds And yes... that means E8 v.1 can be re-built again as I will have parts.
  14. sundownz

    New Stuff for Sundown coming soon !

    Few other things that haven't been directly talked about... just mentioned in passing : 1) Z v.2 woofers have been revised as time has progressed. * Coils are now 4-layer round quad-wound biflair copper coils... more robust than the original aluminum, the copper has a lower expansion ratio which helps in the tight gap, more BL^2/RE (motor force), lower FS, etc. * My testing shows no loss in SPL at lower power and a 0.3 gain above 6kw burps. * Top shorting ring was removed -- but internal ring was upgraded to copper. * WoofersEtc has ordered some of every size and coil configuration so I'll be posting new T/S specs for every size soon. 2) Nightshade v.2 SPL coils will be available soon... not suggested for daily as they tighten the gap but I expect higher motor force from these and the DCR is lower... also slightly shorter WW for lowered mass. Testing to come when they arrive.
  15. sundownz

    From: Used, B-Stock, Refurbished Amps, and MISC

    No, those had no boxes or remotes.
  16. sundownz

    From: Used, B-Stock, Refurbished Amps, and MISC

    Lots of these selling... list updated.
  17. sundownz

    You guys know I can't just work on one...

    Correct. Without resorting to gigantic sized magnets you can get a VERY powerful motor with Neo.
  18. sundownz

    125.2 heat problem

    Check the ground - if that is good and the amp is not shutting off it's fine. Those do run warm / hot - especially when it's hot outside.
  19. sundownz

    Sundown SA-8 Thermal Test

    We got bored a few minutes after close and decided we were going to smoke a pair of mechanically damaged SA-8s -- well it turned out to be harder than we suspected to thermal these little guys... even the 2" coil SA-8 was able to out-last the Type-R 12" that we tested - I am pretty satisfied with that. Video comment : "Comes online at 69v/9.5A=655 watts so 325 each... crank it up a bit and land at 81.5v/10.5A=855 watts so ~427 each. All the way down at 3 minutes we are still at 82.6v/9.16A=756 watts... we keep playing nice until 5 full minutes elapsed at right around rated power levels then crank it up all the way to 115v/12.5A=1437 watts or 718 each !!! Then continued to play for ANOTHER 2 minutes or so at this power level before smoking the coil." Not too shabby for subs rated 400 RMS each... especially keeping in mind that at 60 Hz there is very little excursion so coil cooling is nowhere near optimal. On music with higher excursion the coils will cool even better. So remember... SA-8s are MECHANICALLY limited... chances are you will not smell them or hurt the coil, ever. So don't do the "smell test" to see if you have too much power -- watch the level of excursion and listen for mechanical distortion! Pardon the opening remarks *laughs* Brandon didn't let me finish introducing the video.
  20. sundownz

    You guys know I can't just work on one...

    The "back plate" part is 25mm thick -- and is needed for the amount of flux intended for the design. 35mm of the plate is cut out for clearance which leaves a good bit of room so I can use a range of coil lengths. With a 50mm long coil I have 37.5mm of clearance remaining, for example. I didn't want to have a multi-piece assembly so I had it all milled out from a solid chunk of steel... back plate and pole are all one piece.
  21. sundownz

    You guys know I can't just work on one...

    Going to do some more work on this as it is then have another one made with more magnet slugs on it.
  22. sundownz

    You guys know I can't just work on one...

    I do not know if it will be made so I have not estimated pricing. Nor do I know if the design is even done -- just sharing photos of stuff I'm working on at this point.
  23. sundownz

    You guys know I can't just work on one...

    Sample is here -- needs more work before testing is to begin -- but here are some pictures next to an SA-8 : I may have to make the motor a LITTLE smaller too -- it's a huge battle to mount it with speaker wires *laughs*
  24. sundownz

    From: Used, B-Stock, Refurbished Amps, and MISC

    It is broken - someone hooked it up backwards.
×