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Help with setting Crossover

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Old Aug 16, 2024 | 04:07 PM
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Default Help with setting Crossover

I've searched and read so much that now I'm confused on where to set my Crossover. Below I have what I'm using and the specs. I have not set the Gains yet, but will use an Oscilloscope to do so.


HEADUNIT

Soundstream HDHU.14+
Digital EQ
Crossover: Off or up to 125 @ 12 or 24 slope

AMPLIFIER

ARC Moto720
Ch 1-2 Bridged | Ch 3-4 Bridged
4- Channels @ 4 Ohms 150 Watts
4-Channels @ 2 Ohms 180 Watts
2-Channel @ 4 Ohms (Bridged) 360 Watts (Bridged)
2-Channel @ 2-Ohms (Bridge) Not Recommended
Frequency Response 10Hz - 20kHz
Amplifier Frequency Response (Using Factory Radio) 85Hz - 20kHz
Crossover Range 50Hz - 550Hz
Bass Boost No
Remote Level Control Included No
Input Sensitivity (Low) 200mV - 3.5V
Built in Fan Cooling Yes
Signal Input Connection Type Pigtail (PNP) Harness
Pigtail Harness Included Yes, RCA harness included
Signal Input Connection compatibility Direct connection to RCA Harness, PSM or MPAK wire harness kit
Dimensions 8.125"(L) x 5.43"(W) x 1.8"(H)

SPEAKERS

x2 In my RGS Fairing

CH65.4 6.5" 2-Way Full Range 4 Ohm Coaxial 500W RMS / 1000W MAX (Pair)

FEATURES
• 500W RMS / 1000W MAX Power Handling – PAIR
• Neodymium High-Energy / Light Weight N35H Magnet Structure
• Heavy Duty / High-Temp Cast Aluminum Basket
• 2.0” High-Temp (BlackCoat ) Voice Coil for Midbass - 4 or 2 Ohm
• 1.4” Aluminum Diaphragm High-Temp Voice Coil for Tweeter - 8 Ohm
• Water Repellant Pressed Paper cone with Treated Cloth Surround
• Frequency Response: 75Hz -20Khz +/- 5dB - CH65.4/CH65.2
• High Sensitivity: 96.4dB /99dB Average (1W/1M - 2.83V) - CH65.4 / CH65.2
• 12dB Crossover with Custom Tooled / Vented Case
 
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Old Aug 17, 2024 | 06:50 PM
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After setting the gains, I would set the crossover at 120hz-20k. That would be a good starting point.

Lots of speakers show specs of 70 or 75hz and up. I've tried countless 6.5's, none were able to play below 100hz with ample power.
 
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Old Aug 19, 2024 | 01:46 PM
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So you are going to bridge that amp to 1 pair of CH's? If yes, how much wattage will you set gains to? Full power?
 
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Old Aug 19, 2024 | 04:51 PM
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@cshocker I was hoping that you'd chime in.


Oh no not full power. Max is 500, RMS is 250 per speaker, but the amp is 360 per channel bridged.

The HDHU.14+ has a max volume setting of 50 on the dial, but lets you set max volume in the settings. I turned the volume to 45 and using a test tone of 1kHz -5db, set the gains with my oscilloscope. I never saw clipping on the scope. Then set max volume to 40 in the HDHU.14+ settings.

I should put my meter on the amp, but right now the gains are set to just over half.

I know just enough about audio settings to get me in trouble, but hopefully not blow my speakers.
 

Last edited by Glenn Gorman; Aug 19, 2024 at 04:54 PM.
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Old Aug 19, 2024 | 05:05 PM
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Originally Posted by Glenn Gorman
@cshocker I was hoping that you'd chime in.


Oh no not full power. Max is 500, RMS is 250 per speaker, but the amp is 360 per channel bridged.

The HDHU.14+ has a max volume setting of 50 on the dial, but lets you set max volume in the settings. I turned the volume to 45 and using a test tone of 1kHz -5db, set the gains with my oscilloscope. I never saw clipping on the scope. Then set max volume to 40 in the HDHU.14+ settings.

I should put my meter on the amp, but right now the gains are set to just over half.

I know just enough about audio settings to get me in trouble, but hopefully not blow my speakers.
First step, measure with a meter. Every other setting means absolutely nothing.

I’ve ran them anywhere from 100w to 380w each speaker.

I would first set them at 200W each. Set your head unit at anything under 48. Set crossovers to 120.
Ride bike around and see what ya think. Increase power if you want more. Decrease power and decrease x over if you want more kick/punch.

I had mine at 380w and crossed at 100, DSP’d. Wanted to see how they held up. And they did. BUT I would not recommend it, unless you want to take a chance at blowing them.
 
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Old Aug 19, 2024 | 06:24 PM
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Originally Posted by cshocker
First step, measure with a meter. Every other setting means absolutely nothing.

I’ve ran them anywhere from 100w to 380w each speaker.

I would first set them at 200W each. Set your head unit at anything under 48. Set crossovers to 120.
Ride bike around and see what ya think. Increase power if you want more. Decrease power and decrease x over if you want more kick/punch.

I had mine at 380w and crossed at 100, DSP’d. Wanted to see how they held up. And they did. BUT I would not recommend it, unless you want to take a chance at blowing them.
I agree with shock....200-225 watts crossed at 120...plenty of power in your face. Set them at 30v.
 

Last edited by golfblues; Aug 19, 2024 at 06:26 PM.
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Old Aug 20, 2024 | 12:44 AM
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Originally Posted by cshocker
First step, measure with a meter. Every other setting means absolutely nothing.

I’ve ran them anywhere from 100w to 380w each speaker.

I would first set them at 200W each. Set your head unit at anything under 48. Set crossovers to 120.
Ride bike around and see what ya think. Increase power if you want more. Decrease power and decrease x over if you want more kick/punch.

I had mine at 380w and crossed at 100, DSP’d. Wanted to see how they held up. And they did. BUT I would not recommend it, unless you want to take a chance at blowing them.
That's easy for you guys to say, I ride a road glide. Besides the fairing, I have to remove the headlight then remove the amp from under the radio mount to make adjustments. 😁
 
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Old Aug 20, 2024 | 10:17 PM
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@cshocker

Only using two speakers in the RGS fairing, what do you like, for cruising @ 80, if not the Cicada's?
 
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Old Aug 21, 2024 | 01:55 PM
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Originally Posted by Glenn Gorman
@cshocker

Only using two speakers in the RGS fairing, what do you like, for cruising @ 80, if not the Cicada's?
My favorite 2 speaker only set is the Euphoria EX6NCD-CF. But they are expensive and like a lot of power.

Otherwise, I like mmats pa601cx's and Euphoria EX6NCX d for 2 speaker setups.

I have not heard the Cicada CXX's yet but have heard really good reviews on them.
 

Last edited by cshocker; Aug 21, 2024 at 01:57 PM.
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Old Aug 21, 2024 | 07:26 PM
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What an afternoon. Decided to check the ARC amp with a meter. Unplug the speaker wires from the amp, put the probes in, turn on the bike, turn on and set the meter to AC and play the 1kHz. Nothing on the meter, turn up the gain and still nothing. OK, maybe the batteries are bad even though the screen lights up. Put new batteries in, still nothing but zero's on the screen. So maybe the meter is bad, off to Home Depot to buy a new one.

Well guess what, still nothing but zero's on the screen. I hooked the speakers back up and no problem there. Hooked the Oscilloscope up and no problem there.

Here's the meter that I picked up from HD and set to AC. And just to make sure that I had good contact, I hooked speaker wires up to the amp and used alligator clips to hold the wire on the probes.
 
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