Amp getting overpowered?

[Jordan]

What are the specs on the Type R sub? Its DVC, so how many ohms per coil?

If you are running it as <2OHM load it is most likely just the amp section that is causing the overheating. Disconnect your sub wire from the amp, and test the resistance at the 2 wires that were just connected to the amp. Let us know what the resistance is.

[325is_MadBimmer]

What are the specs on the Type R sub? Its DVC, so how many ohms per coil?

If you are running it as <2OHM load it is most likely just the amp section that is causing the overheating. Disconnect your sub wire from the amp, and test the resistance at the 2 wires that were just connected to the amp. Let us know what the resistance is.

Jordan, i really dont mean to sound like a super-noob, but how do i test the resistance?

sorry if i am frustrating you, but everyone has to learn sometime.

thanks for the help

[KenC]

What are the specs on the Type R sub? Its DVC, so how many ohms per coil?

If you are running it as <2OHM load it is most likely just the amp section that is causing the overheating. Disconnect your sub wire from the amp, and test the resistance at the 2 wires that were just connected to the amp. Let us know what the resistance is.

Jordan, i really dont mean to sound like a super-noob, but how do i test the resistance?

sorry if i am frustrating you, but everyone has to learn sometime.

thanks for the help

You need a multimeter.

If you get the specs on the sub and the amp, one of us can probably tell you if you're running too low of impedence off of the amp. Just copy and paste the specs.

[Jordan]

Ken, why do clueless people do their own installs when it is clear to everyone they have no idea what they are doing?

[325is_MadBimmer]

Ken, why do clueless people do their own installs when it is clear to everyone they have no idea what they are doing?

I like to learn hands on. I am not sure how else i am going to learn then do the job myself and learn from my mistakes.

but now i am going to sleep. I will get you guys all the indepth specs on the amp and the sub tomorrow afternoon.

btw jordan, i got your CD today and it looks good.

thanks

[KenC]

Ken, why do clueless people do their own installs when it is clear to everyone they have no idea what they are doing?

Beats me...
If I had just dropped money on some equipment, I sure as hell woudn't be installing it if I had no clue what I was doing..

[BMW BMXER]

Oh come on guys we all started somewhere.

Of course reading instructions and message boards and the like would have helped before the installation.

[325is_MadBimmer]

Ken, why do clueless people do their own installs when it is clear to everyone they have no idea what they are doing?

Beats me...
If I had just dropped money on some equipment, I sure as hell woudn't be installing it if I had no clue what I was doing..

Its kind of hard to do that when for all my equipment i paid $1000 and had an estimate to install it for $600. i rather make mistakes and take forever to install it properly then pay that much from a day worth of work.

ok, goodnight

[Rob]

the Type R is available with both 4ohm and 2ohm coils

[325is_MadBimmer]

the Type R is available with both 4ohm and 2ohm coils

thats exactly what i have to check today, i am not sure which one i have.

[KenC]

the Type R is available with both 4ohm and 2ohm coils

thats exactly what i have to check today, i am not sure which one i have.

Better hope you have the dual 2 wired in series. I doubt the sub channel can handle a 2 ohm load (dual 4 in parallel) without external fans.

[325is_MadBimmer]

ok so i got the 4 ohm (4ohm + 4ohm) and here are the specs for it on the alpine website

-------• Frequency Response:
28Hz – 2kHz
• Kevlar Reinforced Pulp Cone
• High Excursion 1” Santoprene® Surround
• Dual Custom Progressive Nomex® Spiders
• Integrated Tinsel Lead Design
• Custom Cast Aluminum Frame
• Extra Length Extended Pole
• Flared Pole Vent
• Bumped Backplate
• Heat Transfer Plate
• High Strength Brass Voice Coil Bobbin
• Double Stacked Magnets
• Heavy Duty 8ga. Push Terminals
• Oversized Parabolic Dustcap
• Magnetically Optimized Motor Structure
• Designed and Engineered in the USA

then i got the MRV-F450 amp and here are specs on that

-----------•14.4V RMS Continuous Power 4ohm; Stereo (0.08% THD) 50Wx4 + 4ohm; 200Wx1 Stereo (0.3% THD) 2ohm; Stereo 60Wx4 + 4ohm; 200Wx1 4ohm; Stereo 120Wx2+ 4ohm; 200Wx1
• 12V RMS Continuous Power 4ohm; Stereo (0.08% THD) 30Wx4 + 4ohm; 150Wx1 Stereo (0.3% THD) 2ohm; Bridged 40Wx4 + 4ohm; 150Wx1 4ohm; Stereo 80Wx2 + 4ohm; 150Wx1
• Bass Engine®
• S/N Ratio 100dBA
• Frequency Response: 10-50kHz
• 12dB HP/LP Crossover
(30-400Hz)
• Subsonic Filter
• Extra Large Gold Plated Terminals with Wire Insert Capability
• Top Panel Power LED
• 4 Volt Input Capability
• Continuously Adjustable Crossovers
• DC Straight, STAR Topology
• DC-DC/PWM MOSFET Power Supply


ok now for the pictures, i took a lot of pictures, and excuse the bad quality as I am using my sony camcorder to take the pics. I ordered a canon S70 a few days ago.


this probably makes no difference, but this is my headunit, nakamichi CD-45z




view of my whole trunk set-up




Top view of my amp




My crossovers



Closeup of the crossovers



View of the power/ground going into my amp, as well as the fuse



This is where my power cable is going, along the wall and into my battery



This is where its connectedx to the power



In that little corner, you can see the rca's/speaker cable going up and through the cable hole? on the driverside of the back seat.



Front picture of the sub



Away picture of the front



closeup of the positive side



close up of the negative side



View of the back of the sub







sorry for all the pictues, but i want to make sure you guys get a good idea of how everything is set-up

[808BMW]

Can't really see in the pictures, but is it wired series?

If it's wired series, it would be 8 ohm, and I would probably say that gains are too high (trying to turn up the quiet woofer).

Either way, parallel or series, it's probably a bad idea for a single sub setup off that amp.

your dual 4 ohm can be wired to either 8 ohm or 2 ohm, a dual 2 ohm could be wired in series for a 4 ohm load.

Your amp has no specs for a 2 ohm load, so I'm guessing it's not designed to be run at 2 ohms.

My suggestion would be to try and trade your dual 4 type R for a dual 2 type r (or something better).

[KenC]

Your sub looks like it's hooked up in series. You should have the speaker wire going from the amp into one voice coil, and then that voice coil should be in parallel with the other vc in the sub.

Do the Type-Rs really have the negative terminals of both vc's on one side of the sub and then both positives on the other side?

[325is_MadBimmer]

Can't really see in the pictures, but is it wired series?

If it's wired series, it would be 8 ohm, and I would probably say that gains are too high (trying to turn up the quiet woofer).

Either way, parallel or series, it's probably a bad idea for a single sub setup off that amp.

your dual 4 ohm can be wired to either 8 ohm or 2 ohm, a dual 2 ohm could be wired in series for a 4 ohm load.

Your amp has no specs for a 2 ohm load, so I'm guessing it's not designed to be run at 2 ohms.

My suggestion would be to try and trade your dual 4 type R for a dual 2 type r (or something better).

Ok ic. i'll see if i can trade the sub, but i would like to keep this one because if i were to change subs, i would get two 8's

would it be fine if i just isntalled some fans to cool down the amp?