When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Good day everyone. I'm new to the forum, not to motorcycles but I recently purchased my first Harley, a 2016 street glide special with the boom radio and found the factory speakers underwhelming and wanted to upgrade them so I ordered a soundstream 400.4 amp, biketronics bt355 line leveler and Ground Zero GZCF 6.5SPL speakers.
I plan to work on the physical install aspect of it this weekend and anticipate no issues but I honestly have zero idea on how I should set up the amp and line leveler so I don't blow the speakers. I've done number installs on cars in the past but I've never gotten into the tuning aspect of it and would really appreciate if someone could help me out with the basic setup and point me in a good direction of how to fine tune it. I tried figuring it out on my own but its all kind of foreign to me, I see people talking about setting the crossover to 100hz ish but this amp the crossover just lets you select lp f hp but then I was reading about using the gain and checking voltage to set it or something and honestly get lost, but I'm great at following written directions if someone could help walk me through it.
I'm attaching pictures of the amp and biketronic bt355 to help you help me. The biketronic bt355 does have another sticker on it that recommends not changing any setting as it supposed to sound best with factory settings.
Thank you for reading my thread and hopefully helping me out.
Good day everyone. I'm new to the forum, not to motorcycles but I recently purchased my first Harley, a 2016 street glide special with the boom radio and found the factory speakers underwhelming and wanted to upgrade them so I ordered a soundstream 400.4 amp, biketronics bt355 line leveler and Ground Zero GZCF 6.5SPL speakers.
I plan to work on the physical install aspect of it this weekend and anticipate no issues but I honestly have zero idea on how I should set up the amp and line leveler so I don't blow the speakers. I've done number installs on cars in the past but I've never gotten into the tuning aspect of it and would really appreciate if someone could help me out with the basic setup and point me in a good direction of how to fine tune it. I tried figuring it out on my own but its all kind of foreign to me, I see people talking about setting the crossover to 100hz ish but this amp the crossover just lets you select lp f hp but then I was reading about using the gain and checking voltage to set it or something and honestly get lost, but I'm great at following written directions if someone could help walk me through it.
I'm attaching pictures of the amp and biketronic bt355 to help you help me. The biketronic bt355 does have another sticker on it that recommends not changing any setting as it supposed to sound best with factory settings.
Thank you for reading my thread and hopefully helping me out.
So that amp is not a Soundstream, but instead a Soundigital 400.4EVO. The amp can definitely power your speaker selection but the lack of a crossover isn't ideal when using stock head unit. A lot of guys (if not most) will use the EVOX line which incorporates a built in crossover into the amplifier.
But now working with what you have, if it was me, I would bridge the speakers, set gains using an multimeter or oscilloscope to 28v (200 watts a speaker) with HU flat (bass/trebel @ 0) and set the crossover to HP which will cross those speakers @ 80hz. I run those GZ's @ 225w crossed at 80hz but I have a steep slope of 24...but again with what you are working with, I'm confident you'll be safe and like the sound those speaker provide. You'll also need to cut or heat your pod to ensure those speakers fit.
As far as line leveler and stock head unit, someone else needs to chime in. I know you'll want to flash your head unit to remove the programed EQ Harley installs from the factory.
So that amp is not a Soundstream, but instead a Soundigital 400.4EVO. The amp can definitely power your speaker selection but the lack of a crossover isn't ideal when using stock head unit. A lot of guys (if not most) will use the EVOX line which incorporates a built in crossover into the amplifier.
But now working with what you have, if it was me, I would bridge the speakers, set gains using an multimeter or oscilloscope to 28v (200 watts a speaker) with HU flat (bass/trebel @ 0) and set the crossover to HP which will cross those speakers @ 80hz. I run those GZ's @ 225w crossed at 80hz but I have a steep slope of 24...but again with what you are working with, I'm confident you'll be safe and like the sound those speaker provide. You'll also need to cut or heat your pod to ensure those speakers fit.
As far as line leveler and stock head unit, someone else needs to chime in. I know you'll want to flash your head unit to remove the programed EQ Harley installs from the factory.
Thanks for the help, ill use this as a starting point.
Im planning to make my own amp mounting bracket out of a sheet of aluminum and prepared to modify the stock speakers pods.
I bought this specific line leveler because it's supposed to be designed to be used without flashing the radio, supposed to fix the bass distortion issue without a flash and seeing as the harley dealer is 1.5 hours away I wanted to do all I could first without having to take it in somewhere.
I bought this specific line leveler because it's supposed to be designed to be used without flashing the radio, supposed to fix the bass distortion issue without a flash and seeing as the harley dealer is 1.5 hours away I wanted to do all I could first without having to take it in somewhere.[/QUOTE]
Harley dealers don't do the correct radio flash's. You need to go to https://technoresearch.info/dealer-map/ and find a dealer in your area to flash it.
You will get much better sound out of flash instead of that line leveler.
Actually, what you have presently will work perfectly. The BT 355 line leveler is nothing more than an external high pass filter That blocks the base signals before they get to the amp So not to damage the amp from distortion on the low frequencies. With that being said, once you said, the line leveler, You dont even use a high pass filter on your amp.
So that amp is not a Soundstream, but instead a Soundigital 400.4EVO. The amp can definitely power your speaker selection but the lack of a crossover isn't ideal when using stock head unit. A lot of guys (if not most) will use the EVOX line which incorporates a built in crossover into the amplifier.
But now working with what you have, if it was me, I would bridge the speakers, set gains using an multimeter or oscilloscope to 28v (200 watts a speaker) with HU flat (bass/trebel @ 0) and set the crossover to HP which will cross those speakers @ 80hz. I run those GZ's @ 225w crossed at 80hz but I have a steep slope of 24...but again with what you are working with, I'm confident you'll be safe and like the sound those speaker provide. You'll also need to cut or heat your pod to ensure those speakers fit.
As far as line leveler and stock head unit, someone else needs to chime in. I know you'll want to flash your head unit to remove the programed EQ Harley installs from the factory.
I wasn't able to get as much done this weekend as I wanted but I'm ready to set the volts with a multimeter and then reassemble the front end. I know the bike needs to be running when I set this but the radio has the feature where it increases volume with your speed, do I need to disable this feature completely from now on since it could increase the volume past what I set as my max volume at 28v/200w ?
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.
New amp & speakers, requesting help setting it up
