Budget component setup

[tylerj 10+ year member]

Celestion Neodymium 5" Full Range Woofer 4 Ohm | 299-414

ordered 4 of these midrange drivers. I am planning on running them in pairs, wired in series, on separate channels, off my Alpine MRV-F345, Using a Low pass filter.

The amp is rated 100x4 @ 4 ohm.

Then i am planning on purchasing some tweeters to run on the other two channels, using the High pass filter.

Am I doing it right?

Click to read more...

 

[mylows10 5,000+ posts]

No if you use the lp filter in them. You'll most likely blue them. Use the full pass or hp down to 80 hertz

 

[tylerj 10+ year member]

No if you use the lp filter in them. You'll most likely blue them. Use the full pass or hp down to 80 hertz

I assumed I need to keep the higher frequencies (intended for the tweeters) from the mid woofer?

 

[mylows10 5,000+ posts]

I assumed I need to keep the higher frequencies (intended for the tweeters) from the mid woofer?

Yes. Set the hp down to 500 hertz on the tweets

 

[tylerj 10+ year member]

Yes. Set the hp down to 500 hertz on the tweets

so I can send anything under 500 hz to the mid woofers without damaging them?

 

[mylows10 5,000+ posts]

The filters are cutoffs. So the tweets will play down to where you set the cutoff at. And the same with the lp

 

[tylerj 10+ year member]

The filters are cutoffs. So the tweets will play down to where you set the cutoff at. And the same with the lp

Thank you, you are being very helpful.

Will I damage these mid range drivers if I send to low of frequencies to it? Will they be fine playing frequencies below, say, 60 hz?

 

[mylows10 5,000+ posts]

Thank you, you are being very helpful.
Will I damage these mid range drivers if I send to low of frequencies to it? Will they be fine playing frequencies below, say, 60 hz?

depends on how much power you push to them. The lower the frequency the less power they will take

 

[tylerj 10+ year member]

depends on how much power you push to them. The lower the frequency the less power they will take

FMOD Crossover Pair 70 Hz High Pass | 266-272

so If I add an inline high pass filter as such to the mid range driver, and use the low pass filter on the amp to keep out the highs, then use the other two channels for tweeters, using the high pass filter on the amp to keep away the lows...

Il be doing it right ?

 

[mylows10 5,000+ posts]

You don't need those. Just set the amps crossovers as such full for the Mids and hp at say 300-500 for the tweets. What happens is the speakers will play no lower frequencies than where the crossovers are set to. But everything above will play. The Mids will be fine. If your running active which that's what it sounds like you want to do. You might wanna read up more on what needs to be done. To have sound right. @keep_hope_alive ; hopefully he'll chime in to help you better

 

[tylerj 10+ year member]

[quote name='mylows10']You don't need those. Just set the amps crossovers as such full for the Mids and hp at say 300-500 for the tweets. What happens is the speakers will play no lower frequencies than where the crossovers are set to. But everything above will play. The Mids will be fine. If your running active which that's what it sounds like you want to do. You might wanna read up more on what needs to be done. To have sound right. @keep_hope_alive ; hopefully he'll chime in to help you better[/QUOTE]

awesome, thank you. I wanted to make sure I dont blow/clip these mid woofers by sending them the whole range of frequencies. Im not sure how any of this works ^_^

but all the equipment is real cheap, and its going to be interesting ! cant wait for the stuff to come in the mail :veryhapp:

 

[mylows10 5,000+ posts]

Well like I said hopefully kha will chime in to help you. Normally you need a active capable deck and or amps. Or an electronic active crossover for this to work correctly

 

[trumpet 5,000+ posts]

Based on the FMOD link you should be ok with those filters, although if you find they allow too much bass through you will have to buy a different pair. I'd try the 100 Hz FMODs instead of 70 Hz. That will still allow a good amount of music below 100 Hz to pass through, as it's not a "brick wall" kind of crossover. Your mid/tweeter crossover will depend on how your mids and tweeters perform, but a safe estimate assuming typical soft dome tweeters is 2.5 kHz - 3 kHz. It's also wise to add a capacitor on each tweeter for protection from pops or accidentally sending a full range signal. Car Audio - Speaker Crossover Chart and Capacitance vs. Frequency Calculator(High-pass)

parts-express.com sells the capacitors. You don't need to spend more than a couple of bucks on 2 capacitors.

 

[keep_hope_alive Premium Member]

The MRV-F345 is a flexible amplifier.

CH 1&2 crossover switch: Select high-pass, low-pass, or full-range operation for the CH 1&2 speaker outputs

CH 1&2 frequency control: Rotary control adjusts the crossover frequency from 30Hz-400Hz or 600Hz-8kHz (depending on frequency multiplication switch)

CH 1&2 frequency multiplication switch: Select "x1" for frequency band 30Hz-400Hz or "x20" for frequency band of 600Hz-8kHz

CH 3&4 crossover switch: Select high-pass, low-pass, or full-range operation for the CH 3&4 speaker outputs

CH 3&4 frequency control: Rotary control adjusts the crossover frequency from 30Hz-400Hz or 600Hz-8kHz (depending on frequency multiplication switch)

CH 3&4 frequency multiplication switch: Select "x1" for frequency band 30Hz-400Hz or "x20" for frequency band of 600Hz-8kHz

Input channel selector switch: Select between 1/2, 3/4, and 1+3/2+4

That means you can use the amp LPF set around 2kHz-4kHz depending on the woofer's off-axis performance and low frequency performance of the tweeters.

Since the amp doesn't feature a bandpass crossover feature, you will need some sort of high-pass filter on the woofers. what frequency depends on what other woofers are in the system. luckily, you can easily adjust the crossover frequency between woofers and tweeters as needed once you pick your tweeters. no passive crossovers are needed, but a single small non-polarized capacitor in series with each tweeter will offer extra protection if you accidentally change the frequency multiplier.

 

[tylerj 10+ year member]

The MRV-F345 is a flexible amplifier.
CH 1&2 crossover switch: Select high-pass, low-pass, or full-range operation for the CH 1&2 speaker outputs

CH 1&2 frequency control: Rotary control adjusts the crossover frequency from 30Hz-400Hz or 600Hz-8kHz (depending on frequency multiplication switch)

CH 1&2 frequency multiplication switch: Select "x1" for frequency band 30Hz-400Hz or "x20" for frequency band of 600Hz-8kHz

CH 3&4 crossover switch: Select high-pass, low-pass, or full-range operation for the CH 3&4 speaker outputs

CH 3&4 frequency control: Rotary control adjusts the crossover frequency from 30Hz-400Hz or 600Hz-8kHz (depending on frequency multiplication switch)

CH 3&4 frequency multiplication switch: Select "x1" for frequency band 30Hz-400Hz or "x20" for frequency band of 600Hz-8kHz

Input channel selector switch: Select between 1/2, 3/4, and 1+3/2+4

That means you can use the amp LPF set around 2kHz-4kHz depending on the woofer's off-axis performance and low frequency performance of the tweeters.

Since the amp doesn't feature a bandpass crossover feature, you will need some sort of high-pass filter on the woofers. what frequency depends on what other woofers are in the system. luckily, you can easily adjust the crossover frequency between woofers and tweeters as needed once you pick your tweeters. no passive crossovers are needed, but a single small non-polarized capacitor in series with each tweeter will offer extra protection if you accidentally change the frequency multiplier.

Based on the FMOD link you should be ok with those filters, although if you find they allow too much bass through you will have to buy a different pair. I'd try the 100 Hz FMODs instead of 70 Hz. That will still allow a good amount of music below 100 Hz to pass through, as it's not a "brick wall" kind of crossover. Your mid/tweeter crossover will depend on how your mids and tweeters perform, but a safe estimate assuming typical soft dome tweeters is 2.5 kHz - 3 kHz. It's also wise to add a capacitor on each tweeter for protection from pops or accidentally sending a full range signal. Car Audio - Speaker Crossover Chart and Capacitance vs. Frequency Calculator(High-pass)parts-express.com sells the capacitors. You don't need to spend more than a couple of bucks on 2 capacitors.

Thank you guys, this helps a bunch