Sub/Amp Help

[tommymilan311]

Okay. I was in another thread and had some questions. I didn't want to completely take over the thread because one question leads to another question and answer and so on and so on.

So here is what is going on. I have 2 type-R 10" (dual 4 ohms) subs with a Alpine MRX-M110.

650 W - 4 Ohm

1100W - 2 Ohm

800W - 1 Ohm

Crutchfield

Alpine-USA.com

I was mislead into buying this amp. Being told that it'll handle more than they say, so on and so on. So I think I've been kinda boned here because I spent most of my amp budget on this and my the rest on my highs amp.

My current HU setup for the amp is:

SW Level = -5 (This was actually needed, connected the RCAs to a scope and was getting about 5V and clipping at 0, clipping stopped at -3, I went -5 for a 2.5V rating and safe measure)

40Hz = -3 Db (sounds cleanest here)

80Hz = -2 Db (Sounds cleanest here)

Amp estimated power total = 1500W

Sub = 750W

I did Scope the amp when it was at 2 ohms to the highest clean power possible which was about 1250 W (No clamp test, just had some multi meters, so I'm sure this isn't entirely accurate). When I brought it down to 1 ohm my volts dropped and I did no additional tuning and have not had a chance to scope it. The amp doesn't get hot after hours upon hours of listening. I had a 9 hour road trip, and no cut offs, and didn't get hotter than warm.

Is my equipment running safely? Any tweaks I can do with my current equipment for better/louder sound? My budget is currently maxed, so buying something is almost entirely out of the question.

I'm open to trades, but thats really all I got to trade //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

Click to read more...

 

[tommymilan311]

Someone? Please? It'd be very much appreciated.

 

[tommymilan311]

Welp. I guess we got nothing on this. I'll just keep it were its at until I get a new amp. That'll probably be after sound deadening and processing.

Thanks //content.invisioncic.com/y282845/emoticons/*******.gif.a649d21efc0d1fd4890a6428166586c1.gif

 

[fly_marlin]

Okay. I was in another thread and had some questions. I didn't want to completely take over the thread because one question leads to another question and answer and so on and so on.
So here is what is going on. I have 2 type-R 10" (dual 4 ohms) subs with a Alpine MRX-M110.

650 W - 4 Ohm

1100W - 2 Ohm

800W - 1 Ohm

Crutchfield

Alpine-USA.com

I was mislead into buying this amp. Being told that it'll handle more than they say, so on and so on. So I think I've been kinda boned here because I spent most of my amp budget on this and my the rest on my highs amp.

My current HU setup for the amp is:

SW Level = -5 (This was actually needed, connected the RCAs to a scope and was getting about 5V and clipping at 0, clipping stopped at -3, I went -5 for a 2.5V rating and safe measure)

40Hz = -3 Db (sounds cleanest here)

80Hz = -2 Db (Sounds cleanest here)

Amp estimated power total = 1500W

Sub = 750W

I did Scope the amp when it was at 2 ohms to the highest clean power possible which was about 1250 W (No clamp test, just had some multi meters, so I'm sure this isn't entirely accurate). When I brought it down to 1 ohm my volts dropped and I did no additional tuning and have not had a chance to scope it. The amp doesn't get hot after hours upon hours of listening. I had a 9 hour road trip, and no cut offs, and didn't get hotter than warm.

Is my equipment running safely? Any tweaks I can do with my current equipment for better/louder sound? My budget is currently maxed, so buying something is almost entirely out of the question.

I'm open to trades, but thats really all I got to trade //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

How'd you get misled into buying it? Your specs don't make much sense. Your specs are off. Don't think the amp is 1 ohm stable, but you have it at 800w into 1 ohm? How do you have the subs wired now? If it's at 1 ohm final, you're in danger of blowing the amp. If it's at 4 ohm, should be fine, but subs are being under powered. Does it sound good?

 

[tommymilan311]

How'd you get misled into buying it? Your specs don't make much sense. Your specs are off. Don't think the amp is 1 ohm stable, but you have it at 800w into 1 ohm? How do you have the subs wired now? If it's at 1 ohm final, you're in danger of blowing the amp. If it's at 4 ohm, should be fine, but subs are being under powered. Does it sound good?

It sounds fine. Crutchfield has the 800W at 1 ohm. I contacted Alpine about it, they said the same thing. I have wired to 1 ohm, I did the 9 hour drive 1 ohm, and have been there for, IDK, a month or two. The amp never gets hot or anything like that, even after hours of use. It sounds fine, but I feel like is isn't as loud as it could be. I know I'm not at RMS for the speakers. I don't have a clamp test, but I was getting 30-40V from the speaker wire at the amp. Which if at 1 ohm (I know it isn't consistently at 1 ohm) Im at 900w-1600w. So roughly 1500w, 750w a speaker

 

[fly_marlin]

It sounds fine. Crutchfield has the 800W at 1 ohm. I contacted Alpine about it, they said the same thing. I have wired to 1 ohm, I did the 9 hour drive 1 ohm, and have been there for, IDK, a month or two. The amp never gets hot or anything like that, even after hours of use. It sounds fine, but I feel like is isn't as loud as it could be. I know I'm not at RMS for the speakers. I don't have a clamp test, but I was getting 30-40V from the speaker wire at the amp. Which if at 1 ohm (I know it isn't consistently at 1 ohm) Im at 900w-1600w. So roughly 1500w, 750w a speaker

This is what I gather:

1. I don't see 1 ohm stability listed anywhere, not even Crutchfield.

2. Amp is rated 1100w at 2 ohms, but has reduced output at 1 ohm?

3. Manufacturer doesn't advertise 1 ohm stability, but claims it?

Something doesn't add up.

 

[tommymilan311]

This is what I gather:
1. I don't see 1 ohm stability listed anywhere, not even Crutchfield.

2. Amp is rated 1100w at 2 ohms, but has reduced output at 1 ohm?

3. Manufacturer doesn't advertise 1 ohm stability, but claims it?

Something doesn't add up.

1. Crutchfield has it under product highlights.

Product Highlights:mono subwoofer car amplifier

650 watts RMS x 1 at 4 ohms (1,100 watts RMS x 1 at 2 ohms)

800 watts RMS x 1 at 1 ohm

2. Yeah, that got me too. Probably has clarity issues or temp issues.

3.Alpine did say they don't recommend using it at 1 ohm but it can be used at 1 ohm, which is why they don't advertise it.

EDIT: This too when reading/digging further:

CEA 2006 Compliant: The MRX-M110's power ratings are measured according to the Consumer Electronics Association CEA-2006 standards. These standards allow you to accurately compare the rated power output of all CEA 2006-compliant amplifiers, even different brands. Manufacturers who adhere to the standards can display the CEA 2006 logo on their products and packaging. The power output is measured from 20 Hz to 400 Hz using a 14.4 volt power supply with no more than 0.01% THD+N:
4-ohm: 650 watts

2-ohm: 1100 watts

1-ohm: 800 watts

I'm at 13.8V consistently. I haven't dropped below 12.5V with my added battery and its back up to 13.8V after the "slam".

 

[fly_marlin]

1. Crutchfield has it under product highlights.
2. Yeah, that got me too. Probably has clarity issues or temp issues.

3.Alpine did say they don't recommend using it at 1 ohm but it can be used at 1 ohm, which is why they don't advertise it.

EDIT: This too when reading/digging further:

I'm at 13.8V consistently. I haven't dropped below 12.5V with my added battery and its back up to 13.8V after the "slam".

I don't think woofers are seeing 750w each. What's your box situation? 1kW setups with the right woofer/box can get plenty loud. IF it's all done right.

 

[Jeffdachef 5,000+ posts]

1. Crutchfield has it under product highlights.
2. Yeah, that got me too. Probably has clarity issues or temp issues.

3.Alpine did say they don't recommend using it at 1 ohm but it can be used at 1 ohm, which is why they don't advertise it.

EDIT: This too when reading/digging further:

I'm at 13.8V consistently. I haven't dropped below 12.5V with my added battery and its back up to 13.8V after the "slam".

To be honest man, i'd wire those subs to 4 ohms and wait, chill a bit and sell the amp and get a 2k amp thats 1 ohm stable. Alpines are durable but to a certain extent. That kind of drop for daily still isnt healthy in the long run.

 

[tommymilan311]

I don't think woofers are seeing 750w each. What's your box situation? 1kW setups with the right woofer/box can get plenty loud. IF it's all done right.

Sub Box

I'm going to build a box eventually, I just didn't have the tools to build one. This matched most of the specs I was lead to.

Specifications: Width: 34"

Depth: 16 1/2"

Height: 12"

Mounting Depth: 15 1/2"

Gross Airspace: 1.402 Cu.Ft. Per Chamber

Net Airspace: 1.25 Cu.Ft. Per Chamber

Port: 10 1/2" X 1 1/4" X 20 1/8"

Tuned @ 35Hz

Port Volume: .152 Cu.Ft.

Ports edges rounded for smooth airflow.

Constructed of industrial U.S. grade 3/4" MDF .

Enclosure is covered in black industrial grade carpet.

Two spring loaded speaker terminals.

High quality sealed with Hot Melt glue.

 

[tommymilan311]

To be honest man, i'd wire those subs to 4 ohms and wait, chill a bit and sell the amp and get a 2k amp thats 1 ohm stable. Alpines are durable but to a certain extent. That kind of drop for daily still isnt healthy in the long run.

Bad for the speakers or amp? my plan was to move the amp inside to power my sub inside. It'd give me plenty of output at 4 or 2 ohms to power any sub I wanted. I am using a Punch right now, it makes this crazing buzzing sound that I can only get to go away temporarily by wiggling the power input terminal. (it was doing this in the car it was in too, its not my power source.)

But a clean 2-3k is up around $300(on the low) and I don't have it ATM.

EDIT: I reread that and it was confusing.

So, I have a Punch hooked up to a JL inside my home with my home theater ATM. My plan was to move the Alpine amp inside when I get a new amp to power my sub inside because the Punch makes this crazing buzzing sounds from the power input terminal.

 

[LosIsATool 5,000+ posts]

This is what I gather:
1. I don't see 1 ohm stability listed anywhere, not even Crutchfield.

2. Amp is rated 1100w at 2 ohms, but has reduced output at 1 ohm?

3. Manufacturer doesn't advertise 1 ohm stability, but claims it?

Something doesn't add up.

It will do 1ohm and cut power. It think the 2k is the same. Idk why or how but it does

 

[LosIsATool 5,000+ posts]

Sub Box
I'm going to build a box eventually, I just didn't have the tools to build one. This matched most of the specs I was lead to.

Box is way to small. Double that size and you will gain big time

 

[tommymilan311]

It will do 1ohm and cut power. It think the 2k is the same. Idk why or how but it does

That is exactly what it does. I was running 50-55V at 2 ohm, and it cut to 30-40V at 1 ohm. I can't say the exact wattage because I don't have a clamp, but the voltage drop on the speaker wire was evident.

 

[fly_marlin]

It will do 1ohm and cut power. It think the 2k is the same. Idk why or how but it does

Interesting. If he's getting 400w per side, should be good though.