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Old 21st December 2011, 02:30 AM   #21
pski is offline pski  United States
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I'll pick another "car audio" brand: JL Audio. Their 6W3 woofer in a small (8.5x8.5x6.25 internal) non-vented surfaced mount enclosure is incredible for about USD 100 plus the box you will need to make.

I have this in my ancient Camry wagon and everybody is amazed.

It should be an easy inclusion in a portable solution.

P
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Old 21st December 2011, 05:51 AM   #22
mdocod is offline mdocod  United States
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Hello pski,

The driver you suggested in sealed configuration, and the driver I suggested in a vented configuration will cross paths at 50hz. In other words, for equal input power, the driver I suggested plays everything above 50hz louder and more efficiently.

80.5dB@1W1M efficiency does nothing positive for this build. If we had a 300W amp to work with your suggestion would be more reasonable.
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Old 21st December 2011, 01:06 PM   #23
Veloxy is offline Veloxy  Sweden
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The B&C seemed nice, although it seems impossible to find it here in europe... and I guess its abit to pricey :/

Really... I still believe the ScanSpeak 18w/4434G 7" is still the best deal here... Even thou the sensitivity is 88.3 db for 1w/1m it IS still the loudest speaker I have found so far. This is due to it being a 4 ohm woofer.

I simulated all the top suitable speakers and these are the graph's I got:
Frequency
Loudness

Yellow: Monacor SPH-176 in a sealed enclosure.
Green: ScanSpeak 18w/4434 in BR
Blue: B&Q 6NDL44 in BR

Last edited by Veloxy; 21st December 2011 at 01:19 PM.
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Old 21st December 2011, 01:21 PM   #24
Veloxy is offline Veloxy  Sweden
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The amplifier delivers 10W in 8Ohm and 22W in 4 Ohm.

I am also later planing on using a rechargeable battery of type LifePO4, around 4200mhA which should last half a day hopefully atleast
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Old 21st December 2011, 02:21 PM   #25
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can that amp do 2 ohm ?
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Old 21st December 2011, 02:33 PM   #26
Veloxy is offline Veloxy  Sweden
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Quote:
Originally Posted by lduarte1973 View Post
can that amp do 2 ohm ?
No, only 4 and 8 ohm...
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Old 21st December 2011, 03:11 PM   #27
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cheap and noisy ?

Goldwood GW-8024 8" woofer - 4 ohm: Madisound Speaker Store

http://www.madisoundspeakerstore.com...-woofer-4-ohm/

http://www.madisoundspeakerstore.com...ar-cone-4-ohm/

Last edited by lduarte1973; 21st December 2011 at 03:15 PM.
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Old 21st December 2011, 05:31 PM   #28
Veloxy is offline Veloxy  Sweden
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Goldwood GW-8024: Requires a sealed box with a qtc of 2.0, way to much...

Goldwood GW-6024: Requires also a sealed box. F3 of about 76Hz sounds good, better than the SPH-176 which has 80Hz. Although, a 10dB peak at 3KHz is nothing I would like to deal with :/

Hi-Vi L6-4R: F3 of about 90Hz is quite high. 88dB sensitivity is also rather low at (2.83V/1m) compared to ScanSpeak's 91.3dB.

IMO ScanSpeak still takes the lead in terms of effeciency, lineraity and quality :/
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Old 21st December 2011, 05:41 PM   #29
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Originally Posted by Veloxy View Post
IMO ScanSpeak still takes the lead in terms of effeciency, lineraity and quality :/
of course it does , i own a pair of SS10F/8424G00 as mids

i just thought you wanted cheap stuff for that project
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Old 21st December 2011, 06:32 PM   #30
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Quote:
Originally Posted by Veloxy View Post
Goldwood GW-8024: Requires a sealed box with a qtc of 2.0, way to much...

Goldwood GW-6024: Requires also a sealed box. F3 of about 76Hz sounds good, better than the SPH-176 which has 80Hz. Although, a 10dB peak at 3KHz is nothing I would like to deal with :/

Hi-Vi L6-4R: F3 of about 90Hz is quite high. 88dB sensitivity is also rather low at (2.83V/1m) compared to ScanSpeak's 91.3dB.

IMO ScanSpeak still takes the lead in terms of effeciency, lineraity and quality :/
At about 95 dB sensitivity the Eminence Alpha 6A beats those by a good margin, but does not go quite as low.

It is a very good sounding speaker, and goes high and smooth enough that tweeter choice and crossover is easy. I have used them outdoors and could get a surprising amount of thump from them.

The box below is about the same size as your suitcase, putting a pair in the same size will still have about the same F3 (85 Hz), but will raise the upper sensitivity to 98 dB. 10 watts to each speaker should get you around 111 dB at one meter.

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