Love Casting

hi
well i have got a 15 inch alpine type r sub woofer and 4 speakers of impedence power of 4 ohms.
the sub woofer description is given below

Alpine SWR-1522D Description
Built from select materials and high-end components, designed for precision and efficiency, and protected by Thermal Management features — the Type-R subwoofers provide the kind of real power and massive bass only hinted at by other speakers.

[Subwoofer Power Features]
• Peak Power 2000W
• RMS Power 750W
• Frequency Response: 22Hz – 500Hz
• High Excursion 1-1/4" Santoprene Edge
• Kevlar Reinforced Pulp Cone
• Dual Progressive Nomex Spiders with Edge Control
• Integrated Tinsel Lead Spider Design
• Custom Cast Aluminium Frame with Integrated Heat Transfer Plate
• Extended Length Dual-Flared Vented Pole Design
• High-Strength Brass Voice Coil Bobbin
• Heavy-Duty 10cm2 Push Terminals
• Computer Optimized Magnetic Circuit
• Designed and Engineered in the USA

speaker descript given below

SPR-69C

Additional information:-

Woofer Unit
Linear Drive Magnet
Multi-Layer Cone
Square Voice Coil Design
Large size Voice Coil
Roll Rubber Surround
Tweeter Unit
1” Ring-Dome Tweeter
Swivel Design
Power Specification

Peak Power: 300W
RMS Power: 100W
Frequency Response: 60Hz – 27kHz
Sensitivity: 89dB, 1W/1m
Installation Diameter: 146 x 216mm
Depth: 75mm

so can any1 pls help me in getting the perfect alpine amp with reasonable price which wud create a blast.

and is it possible to run 4 speakers with a mono channel amp?
thank you

your gonna need 2 amps dude,,,either a class d(mono) or 2 channel for the sub and a 4 channel for the speakers…a mono amp is made specifically for subs(bass)…you dont need an amp for the speakers though but you probably want one

[ Full info @ http://www.robocnc.nl/?page_id=381 ]

Making a dustcollector for my cnc router.
Used the lost foam method.

Result is very rough, how can i improve this?

Thanks…

Duration : 0:7:18

(more…)

hi
i have an alpine 15 inch subwoofer but i am not sure which amp to go for. to be honest i have to look both the cost and the sound quality.
to be honest i need blast…….BOOM sound quality.

Alpine SWR-1522D Description
Built from select materials and high-end components, designed for precision and efficiency, and protected by Thermal Management features — the Type-R subwoofers provide the kind of real power and massive bass only hinted at by other speakers.

[Subwoofer Power Features]
• Peak Power 2000W
• RMS Power 750W
• Frequency Response: 22Hz – 500Hz
• High Excursion 1-1/4" Santoprene Edge
• Kevlar Reinforced Pulp Cone
• Dual Progressive Nomex Spiders with Edge Control
• Integrated Tinsel Lead Spider Design
• Custom Cast Aluminium Frame with Integrated Heat Transfer Plate
• Extended Length Dual-Flared Vented Pole Design
• High-Strength Brass Voice Coil Bobbin
• Heavy-Duty 10cm2 Push Terminals
• Computer Optimized Magnetic Circuit
• Designed and Engineered in the USA

to be honest i have looked two amp
1. Alpine PDX 1.1000 Digital mono
2. Kenwood KAC-PS1D 2400 Watts Mono Digital Power Amplifier

but i am not sure which 1 to go for as there are some confusions between the power output at 2ohm and 4 ohm?

i was told that for my sub i need amp of power output ……at 1ohm?

i am not sure…to be honest i am confused….

so can any1 pls help me?

cheers…

Too many to choose from……..

I am suppose to leach out the ceramic core after casting using Aluminium. So I need the answer for ABOVE questions.
I would like to ask some question which I might find some answers from some of you,

Does Silicon, Calcium or sulphur is effect by diluted Acetic,citric and nitric acids. Does is also effect by sodum flouride?.
Just need a breif answer…..

I kndly request for any answers, I am a researcher Trying to find the answers

IMPORTANT: Find a reliable procedure and stick to it. Both nitric acid and sodium fluoride are potentially extremely dangerous substances, and I get the feeling that you are NOT an experience research chemist.

If I understand correctly, you are making a plaster of Paris core, with silica filler. I am not sure what the best way is to get rid of the core, but you should find out before you start. Presumably the place where you got the recipe for that core should also tell you how to get rid of it. Do NOT use nitric acid or sodium fluoride, and above all do NOT use sodium fluoride in the presence of ANY acid, since that will make hydrogen fluoride which can destroy your skin and your lungs.

I also get the feeling that your research is into ceramics or metallurgy, not chemistry. This is NOT the kind of thing you should be researching into except under the guidance of an experienced chemist, and using full safety precautions.

If you are worried about the effect of acids, the reaction that should concern you most is the reaction with the aluminium.

Aluminium die pressure casting

Duration : 0:3:41

(more…)

Chev Engine Selection Crate Motor?
I’m after a second opinion regarding a crate motor I’m considering to buy.I want to use it for my hot rod ( 32 Ford Roadster )I’m looking at using this motor ( Specs writen below this email )to install a 671 super charger on it.I’ll probably have it under driven, but I’m just wondering what sort of horse power increase I’ll get with the motor after the installation of the blower.
Also the horse power rating that is shown in the specs below ( 290 hp @ 3750 rpm )Does that mean that the motor will only provide a max of 290 hp at that figure or could it produce a higher hp at a higher rpm
Block no – 10066034
Block Type _ Nodular Iron with 4 bolt main caps
Bore / stroke – 4.00 x 3.48
Camshaft Duration – 222? Intake / 222? Exhaust
( @.050in )
Camshaft Lift in – .450 intake / .460 exhaust
Camshaft part no – 3896962
Camshaft Type – hydraulic Flat tappet
Compression – 8.5:1
Connecting Rod – 10108688
Connecting Rod Type – Powderedmetal steel
Crankshaft Part – 93426651
Crankshaft TYPE – Nodular Iron
Cylinder Head Type – Iron : 76cc chambers
Displacement Cu inch – 350
Engine Name 350/290hp
Ignition Timing _ 34? Total BTDC
Maimum RPM – 5100
Piston Pt No – 12514101
Piston Type – Cast Aluminium
Recommended Fuel – 87 Octane
Rocker Arm Ratio – 1.5 : 1
Rocker Arm Pt No – 10089648
Valve Type – 1.94 / 1.50 exhaust
Horse Power – 290 @ 3750 RPM

21 hours ago – 3 days left to answer. – 2 answers – Report Abuse

ok well it says 290hp that mean thats what by theory is what the engine should make.Now you wont get that power to the wheels most likely you would get around 260 or so depending on what kind of transmission you got.Now if your planning on going supercharger i would suggest to get forged internals because if you dont the most boost you going to be able to run is around 7psi more then that on stock internals its going blow something.

I’m after a second opinion regarding a crate motor I’m considering to buy.I want to use it for my hot rod ( 32 Ford Roadster )I’m looking at using this motor ( Specs writen below this email )to install a 671 super charger on it.I’ll probably have it under driven, but I’m just wondering what sort of horse power increase I’ll get with the motor after the installation of the blower.
Also the horse power rating that is shown in the specs below ( 290 hp @ 3750 rpm )Does that mean that the motor will only provide a max of 290 hp at that figure or could it produce a higher hp at a higher rpm
Block no – 10066034
Block Type _ Nodular Iron with 4 bolt main caps
Bore / stroke – 4.00 x 3.48
Camshaft Duration – 222? Intake / 222? Exhaust
( @.050in )
Camshaft Lift in – .450 intake / .460 exhaust
Camshaft part no – 3896962
Camshaft Type – hydraulic Flat tappet
Compression – 8.5:1
Connecting Rod – 10108688
Connecting Rod Type – Powderedmetal steel
Crankshaft Part – 93426651
Crankshaft TYPE – Nodular Iron
Cylinder Head Type – Iron : 76cc chambers
Displacement Cu inch – 350
Engine Name 350/290hp
Ignition Timing _ 34? Total BTDC
Maimum RPM – 5100
Piston Pt No – 12514101
Piston Type – Cast Aluminium
Recommended Fuel – 87 Octane
Rocker Arm Ratio – 1.5 : 1
Rocker Arm Pt No – 10089648
Valve Type – 1.94 / 1.50 exhaust
Horse Power – 290 @ 3750 RPM

Thats a high rating for an engine with such low compression, plus the cam isnt that radical at all, I would go with at least 10:1 compression and for the cam…. 490 lift and 280 duration. The heads are ok…. this engine sounds like a stock 350 pre 1975…. which is nothing wrong with that….. it should give you at least 250 HP and that rating of 290HP is the max you will get. If you want to put on a blower I would go with a forged steel crank and forged aluminum pistons. Good luck.

Second video, step by step detailed description of my foundry in propane furnace, homemade steel crucible.

Duration : 0:9:6

(more…)

IMMORTAL Series Subwoofers
Capable of handling as much as 2250 watts RMS, the Immortal Series Subwoofer is designed for extreme audio enthusiasts in search of a commanding bass rumble. The shape of its surround is specially made to be tall and narrow, maximizing the cone area and giving you more air pressure.

AWIS10P
Common Features
Proprietary Tall Excursion foam surround:
allows for maximum excursion and maximum
cone surface area
Ultra light 2-layer Carbon Fiber, Kevlar®
Cone with aluminum dustcap
Triple Stack Magnet
Chrome plated 3-dimensional cast Aluminium Basket
25mm Top Plate for Increased Efficiency
2 Ohm voice coil wound on
Black anodized aluminum former

you can wire the speakers like this. On one speaker put a wire from one pos. to one neg. then run the left over pos to your amp pos and the left over neg to your amp neg. (on the same channel) do the other speaker the same way. whan you do this you are dropping the ohmsin half you can also do this by bridging the speaker wires at the amp.(by putting them together{neg to neg and pos to pos}) If you want to make the ohms double you run them un series which is done by running one speakers neg to the other speakers neg and one speakers pos to the other speakers pos. and then you run one wire from pos to amp pos and one neg from speaker to amp neg.

800 gm Al at 700*C in 40 minutes.

Duration : 0:3:10

(more…)