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Looneybomber
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PoorManQ45 wrote:splooge!!!!!!!!
Build them sealed in a .3ft^3 box, then build two subs with one Foster 100w amp in each enclosure (35.00/ea)

And a Dayton RS series 10" HF subwoofer in each, ported.

All drivers mentioned above are tested and/or known to have low THD, so the result should be very clean sound. You won't be waking up the neighbors, but that's not why people buy Scan Speak or Dayton HF subs.

Prices would be400 for L/R's70 for sub amps250 for subsEquals 720, plus enclosure prices.


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PoorManQ45
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I like the Qms a little high. I'd go with probably a 0.5^3 enclosure, or maybe even a 0.75^3. That would give a nice free sound

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Looneybomber
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Hell, make them a U framed dipole and line the inner walls with 1" foam. No box coloration

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PoorManQ45
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I like the way you think

I like when someone says, "where's the rest of the box" when they see open baffle speaker

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Looneybomber
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Looneybomber wrote:It's not SS and Morel, but it is SS and SB acoustics, which Zaph Audio tested and found to have a very low THD.

$400/pr as pictured, which is less than just the woofers cost!
Now it's priced at 377.00, but not as pictured. They use lower quality caps, but still good. Solen is not junk, but at that price point, I'd probably wait till the Clarity's were in stock.

*** UPDATE - temporary changes to the crossover parts used in this kit. ***

* Current orders for the RBR Kit will receive crossovers slightly different than pictured above. Component values will remain to exact specifications. Please read below.*

* We are now on back-order for some of the Clarity Caps used in the crossover. The Clarity PX 9 mfd pictured in the woofer circuit will use a Solen Poly FastCap 9 mfd cap instead.*

* The Clarity SA 6.8 mfd used in the tweeter circuit for the standard crossover is also on back-order. We are offering two options in the meantime. Option 1 is an upgrade to a Clarity ESA 6.8 mfd cap in combination with the Clarity SA 12 mfd cap in the series tweeter circuit. Option 2 is to use Clarity PX 6.8 mfd & Clarity PX 12 mfd in this circuit. Price has been adjusted accordingly, select from Crossover drop down menu above when placing your order. *

* Original pricing and options will be restored once our next shipment of Clarity Caps arrives. Rough ETA is mid September. *

I'd like to buy this kit for critical listening and since I am going to sell my Monitor Audio RS1's, I can use that money to buy this kit.

Oh, looks like someone finished a pair on HTGuide.A Fiddleback makore raw veneer was used with an airless applied precatalyzed lacquer finish.
Modified by Looneybomber at 1:47 PM 8/23/2009

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PoorManQ45
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Honestly, that wood choice is horrid... I'm a red oak fan myself

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Looneybomber
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$400 pair introductory price, wont last much longer.http://www.audioholics.com/rev...-e5tih ... m/e5ti.php


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Looneybomber
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I forgot all about this deal at newegg and now it's almost over.

Polk Audio monitor series speakers are on sale till Monday!

Monitor 30's: 100/pr shipped.http://www.newegg.com/Product/...90094

Monitor 40's: 150/pr shippedhttp://www.newegg.com/Product/...90010

Monitor 50's: 88/ea shippedhttp://www.newegg.com/Product/...90013

Monitor 60's: 120/ea shippedhttp://www.newegg.com/Product/...90017

Monitor 70's: 177.99/ea shipped!http://www.newegg.com/Product/...90015

CS2: 110/ea shippedhttp://www.newegg.com/Product/...90024

So for a pretty nice 5 channel setup a person could get the M70's, M50's for the rear, and the CS2 center.That's <$650 shipped. Then add a sub and receiver.

7channels: M60's, CS2, and 2pr M30's. That's ~550 shipped, plus sub and receiver.

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audtatious
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Looneybomber wrote:$400 pair introductory price, wont last much longer.http://www.audioholics.com/rev...-e5tih ... m/e5ti.php
They look nice. 87db sensitivity does not seem very high (granted, 6ohm instead of 8). I'm used to 1w/1m specs, how do you compare that to 2.83V@1m?

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Looneybomber
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audtatious wrote:They look nice. 87db sensitivity does not seem very high (granted, 6ohm instead of 8). I'm used to 1w/1m specs, how do you compare that to 2.83V@1m?
Well using the 1w/1m to me seems pretty universal. It means, regardless of impedence (ohms) at 1watt of input, the speaker will put out XdB's whatever it's efficiency is.

Using a 2.83v/1m is useful when building speakers from scratch using raw speaker drivers (tweeters, mids, woofers, ect...) because an amplifier is technically a voltage source and not a "wattage" source.

So you can pair up an 8ohm, [email protected] tweeter with a 2ohm, [email protected] midbass and when hooked up to an amp, they will produce the same SPL's even though one is getting 1w of power and the other is getting 4w of power at 2.83v. Ultimately that's what's most important. Having one put out 90db and the other put out 80db would create an issue.

It however can also give missleading results when, say, subwoofer companyA has a dual 2ohm sub and they give the sensitivity as [email protected]/1m wired in parallel, but companyB rates their speaker as 88db@1w/1m and it's a single 8ohm voice coil. Once you do the math, you will find that companyB produces a more efficient subwoofer than companyA. However, companyA produces a more sensitive subwoofer.

Efficiency does not equal sensitivity

How a 2.83v/1m rating works out is like this:

At 16 ohms, 2.83v = 0.5 watts.At 8 ohms, 2.83v = 1 wattAt 4 ohms, 2.83v = 2 wattsAt 2 ohms, 2.83v = 4 watts...

So a 2ohm speaker rated at 90db@1w/1m would also be rated [email protected]/1m, because at 2ohms, it would receive 4w instead of 1w.

-Everytime you double the power to a single speaker (negating power compression), you get 3db more output.

-Everytime you double the cone area (meaning two speakers, or an identical speaker but twice the cone size [which is impossible]) but keep the power the same, you get 3db more output.

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audtatious
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OK, that's sensitivity and not efficiency.....

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PoorManQ45
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audtatious: The only way I can think of to measure "efficiency" is to convert an Acoustical watt in to decibels. If we do that, 1 acoustical watt = 120.5dB.

If we use that as a reference point, with 120.5dB at 1 watt being 100% efficient.

Using that, 87dB comes out to 72% efficiency.

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audtatious
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I'm used to comparing sub efficiency numbers to help calculate DB capabilities.

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Looneybomber
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audtatious wrote:I'm used to comparing sub efficiency numbers to help calculate DB capabilities.
f(o)=v+eoutput = o, box volume = v, sub driver efficiency = e.

Increasing either v or e increases o.

However, as the frequency increases, output becomes less enclosure dependent.

So now we're closer to a formula off(o)=v(v/hz)+e
PoorManQ45 wrote:If we use that as a reference point, with 120.5dB at 1 watt being 100% efficient.

Using that, 87dB comes out to 72% efficiency.
Because sound is logarythmic, we can't use strait dividing. A speaker of 117.5db would then be 50% efficient, 114.5 would be 25%, 110.5 would be 10%. Most speakers are in the 1% efficiency range.

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PoorManQ45
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Excellent point. I broke it down for simplicity sake.

And it sounds horrible when you show the true efficiency.


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How did I not discover this thread until now?

Good stuff.

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PoorManQ45
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Because you fail at Nico navigation!

Markc
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Yea, no kidding. I just stumbled across this myself. I had no idea I'd find fellow audio nuts on a car forum.Anyone into building their own stuff like I am? I currently run my 2 channel system with hybrid mono block amps, (that my friend designed and he and I built), and open baffle speakers, ( that I designed and my friend and I built).All modified, (by me), tube gear except for the cd transport, make up the rest of the system.

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PoorManQ45
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I am going to need to see pictures of this equipment if it is in a car.

Tubes are not designed to handle the movement that occurs in a vehicle.

I'd like pictures of everything you've done.

Looney and I build speakers and Subs for home audio.

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Looneybomber
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I'm working on a 2-channel setup...well have been for forever. I seem to not have any time to work on it since I'm a full-time student, work full-time, have a toddler running around, joined the air guard, and am trying to plan a wedding.

My 2 chan rig, right now, will have to be a 6channel active setup, meaning I'll use an electronic crossover and have one amp per speaker driver. I say that because I don't have the time, nor the knowledge to come up with a competent passive crossover design.

For drivers, I'm using a TD15h woofers, Fountek Neopro5i tweeters, and I have yet to decide on a mid. I think I will probably get the B&C 6MD38, but would really like to get the PHL 1120. The PHL is a known performer, but I've seen tests and had various familiar forum members (from DIY forums) tell me how well the B&C performs...and it's half the price of the PHL.

If you hadn't noticed from the drivers picked, it'll have a pretty high efficiency depending on how much baffle step compensation is added into the XO, but that's a moot point when dealing with an active system and a few hundred watts available for each woofer.

Plus it's really tough to design them, when I don't even know what kind of finished product I want. I've juggled designs like the Salk Archos, (same woofer, but one size smaller, PHL mid, and not at all my ribbon tweeter) and the Andromeda by Tony Glee. Both of which would require two completely different crossover designs, so I have to settle on one, built a test enclosure, start taking measurements and slowly start getting a XO design worked out.

Markc
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PoorManQ45 wrote:I am going to need to see pictures of this equipment if it is in a car.

Tubes are not designed to handle the movement that occurs in a vehicle.

I'd like pictures of everything you've done.

Looney and I build speakers and Subs for home audio.
If that reply was for me; then no, it is my home system. I don't get too involved in car audio. But I do think I will change out the crappy tweeters in my I35.Tubes have enough trouble with microphonics while sitting still. I could still supply pics. if your interested.

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PoorManQ45
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That would be great to see pictures!

I like the old super tube amps that delevered 300wpc RMS!!!

Who needs a dedicated heater in the winter?

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If you go to the post above, (infinity speakers), you will find a link to my amps. I'll try and scare up a couple of pics of my speakers.

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Looneybomber
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Ok act quick. The last auction Harman put up was for the TSS-800 speaker for 15.00 shipped and lasted around 4hrs and over 430 units were sold.

Here you have the Infinity TSS-500 satellite speaker for $10.00 shipped.http://cgi.ebay.com/Infinity-T...4038b

Buy 5 for $50, add an inexpensive sub that can cross over at 150hz, and a cheap 5 channel receiver and you have yourself an expandable HTiB for about the same price.

These speakers are small and they're cheap (just like the Bose cube things) so don't expect stellar performance or quality (just like the Bose cube things), but they'll work.-----------------------------------------------------------------------------------------------

Next auction. But it now 25.00 shipped.1 Pair of Harman Kardon HKS3'shttp://cgi.ebay.com/Harman-Kar...b6596

Likely a step up from the Infinity TSS-500's posted above and do cost 2.50/ea more. Still won't be sonically blissful I bet...but will work in a pinch.
Modified by Looneybomber at 6:37 PM 1/12/2010

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PoorManQ45
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Hehe, combine with a HSU for overpowering bass... LOL

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Looneybomber
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PoorManQ45 wrote:Hehe, combine with a HSU for overpowering bass... LOL
Similar to most cars on the road with a "system". Are they still called "systems" or did that term go out of style a decade ago?

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PoorManQ45
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Nope, it is alive and well here in Florida.

It is so annoying to hear only bass... I don't mind rediculous systems, but atleast make it a complete system.

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Looneybomber
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This thread has been neglected.

If interested in PSB speakers, this site has an OK sale on their T-45's and T-55's. I'd rather not put things in this thread that aren't marked down more than 50%, but there have already been some exceptions, so why not have more?

https://dmc-electronics.com/Default.htm

$1399.00

Denon AVR-486S

$100 refurbished.http://www.dakmart.com/p11413/....html

Denon AVR-589http://www.ecost.com/Detail/Re...irect

$139.00 refurbished.
Modified by Looneybomber at 6:35 AM 4/5/2010

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marlin29311
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Paradigm Millenia 300's:

http://www.6ave.com/shop/produ...N300S

$1,098.

Or a neat little deal that likely no one will buy but it's interesting to post anyway...

Pioneer S-3EX speakers:

http://www.audiolab.com/Pionee...e.htm

$3,499 down from $7000.

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Looneybomber
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Switching things up here.

Sears has a 46" Panasonic plasma on sale. TC-P46S1. I bought the 54" when it went on sale. Opened up a Sears card and it came to just over 1000 after tax.

http://www.sears.com/shc/s/p_1...00383

This is 700.00 shipped.



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