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Essentially you are combining the output of two channels into one. You get the positive of one channel and the negative of another channel and connect it to a speaker. If you bridge a 4 channel amp it turns into a two channel amp with a lot of power. There are some downsides as the amp is 4ohm mono which to the amp is the same as 2ohm stereo. With that much pull the amp will likely get hot quicker and often sound quality suffers.....but you got a **** ton of juice!
Bridging An Amplifier – When you bridge an amp you are wiring it in such a way that you combine two channels into one. Essentially doubling the amount of power (watts) it produces. This is most often done when powering a single speaker like a subwoofer. There are a couple of things to pay attention to when bridging an amp. The first is whether the amp is designed to safely produce and handle the additional power from being bridged. If it is or not can be found in the spec sheet and those that are will often be marketed as bridgeable. Unlike the above wiring options, when bridging an amp you’re not looking to make sure your amp has enough power to drive your speakers but that it won’t produce so much power that you blow the speaker. Remember, in this configuration you’re DOUBLING the power being sent to the speaker. Again, this is done by combining two channels. Picture outputs of a 2 channel amp, almost always they will be next to each other. You have a left and a right channel and each one has its own positive and negative. It’ll be configured as some combination of + - - + or maybe + - + -. As can be seen below the positive side of one channel is connected to the positive terminal of the speaker and the negative terminal of that speaker is connected to the negative post of the other channel. Also shown in the picture is how this causes the impedance of the speaker to be cut in half as far as the amplifier is concerned.
That's an interesting comment Haze, have you ever listened to the Bass on the Boom 2 speakers? Volume wise, my system blows it out, but I can not seem to produce the same depth of Warm Bass as the Boom 2 speaker do in front or Back and they're doing that with 5x7 speakers in the back. That drives me nuts when I'm rocking 6X9s with more power! LOL. My Bass is good, but not as deep. I'm wondering if Harley achieves that due to the DSP and whether or not we can simulate that with an EQ or DSP unit...
I think that you have touched on a true issue Vision in your comments concerning how a static bike sounds with a Boom 2 set up running compared to a stock unflashed HU with BT LL’s and amp/s, in particular to the way that the Boom 2 upgrade appears to reproduces bass. I’ve listened to a Street Glide with a Boom 2 system in it and remember the bass reproduction v’s a system I had on my last bike with a Fusion HU, Soundstream PN 4.520D, Polk MM691’s and a pair of BT 7.1’s which didn’t deliver the warm of bass you describe. I appreciate that it is an issue that the Boom 2 can’t deliver this bass at speed.
I’m half way through a system upgrade on a my 2015 Ultra with Hertz ESK 165.5’s in the pods in the fairing and Kappa 62.11i’s in the Tour-pak, on spacers, I’m presently running the speakers off the HU only (with an audio reproduction improvement already noted). This is until I get a moment to install the BT LL’s and a bridged Soundstream PN4.320D in the fairing and a Soundstream PN2.350D in the Tour-pak and complete the build.
After reading your thread I thought I would investigate a mini EQ or a compact DSP suitable for somewhere on the bike. Of course just keep coming back to size, the market is predominately developed for cars, trucks, etc. not motorcycles and their size and power restrictions. In spite of the fact the Ultra is about ½ the size of a small car.
Anyway, in my research I’ve seen various manufactures (Soundstream, AudioControl, Precision Power, HiFonics, etc.) produce a ‘relatively small’ Digital Bass Reconstruction Processor (http://soundstream.com/product/bx-10/) by one name or another. From what I’ve read it appears that they are a straight in and out and would sit in the signal stream between the BT LL’s and the amplifier. My question is has anyone on the forum experimented with one of these before, in particular on a Rushmore series with their associated idiosyncrasies caused by the infotainment system audio output and if so what happened? Is the Biketronics Line Leveler supplying all that can be obtained from the H-D HU? I would appreciate forum members input on this matter.
I think that you have touched on a true issue Vision in your comments concerning how a static bike sounds with a Boom 2 set up running compared to a stock unflashed HU with BT LL’s and amp/s, in particular to the way that the Boom 2 upgrade appears to reproduces bass. I’ve listened to a Street Glide with a Boom 2 system in it and remember the bass reproduction v’s a system I had on my last bike with a Fusion HU, Soundstream PN 4.520D, Polk MM691’s and a pair of BT 7.1’s which didn’t deliver the warm of bass you describe. I appreciate that it is an issue that the Boom 2 can’t deliver this bass at speed.
I’m half way through a system upgrade on a my 2015 Ultra with Hertz ESK 165.5’s in the pods in the fairing and Kappa 62.11i’s in the Tour-pak, on spacers, I’m presently running the speakers off the HU only (with an audio reproduction improvement already noted). This is until I get a moment to install the BT LL’s and a bridged Soundstream PN4.320D in the fairing and a Soundstream PN2.350D in the Tour-pak and complete the build.
After reading your thread I thought I would investigate a mini EQ or a compact DSP suitable for somewhere on the bike. Of course just keep coming back to size, the market is predominately developed for cars, trucks, etc. not motorcycles and their size and power restrictions. In spite of the fact the Ultra is about ½ the size of a small car.
Anyway, in my research I’ve seen various manufactures (Soundstream, AudioControl, Precision Power, HiFonics, etc.) produce a ‘relatively small’ Digital Bass Reconstruction Processor (http://soundstream.com/product/bx-10/) by one name or another. From what I’ve read it appears that they are a straight in and out and would sit in the signal stream between the BT LL’s and the amplifier. My question is has anyone on the forum experimented with one of these before, in particular on a Rushmore series with their associated idiosyncrasies caused by the infotainment system audio output and if so what happened? Is the Biketronics Line Leveler supplying all that can be obtained from the H-D HU? I would appreciate forum members input on this matter.
Tailwind experimented with an AudioControl LC2 but it wasn't a success as it didn't fix the bass issue, it made it worse.
After I'm done with this round of upgrades, I'll be looking at some options also. I've been looking at aa Audison unit for a while, that may be a little too much I might give the AudioContol DQ-61 a look.
Bunker, please let us know how that works out. There has to be a silver bullet here. However, if the Amp is hindering the lower frequencies it will be all for naught.
Bunker, please let us know how that works out. There has to be a silver bullet here. However, if the Amp is hindering the lower frequencies it will be all for naught.
Yeah, that LC2 was not a good addition for my set up. They do have some other products that might break the code but I have not tested any yet. They have a EQ that might just allow us to work around that BS HD Rushmore EQ lockdown.
My dragon wants air ride and has authorized that transaction so the EQ is on hold till her **** is more comfy. She did actually tell me to "crank it up" more than a few times last week so she likey the audio stuff, which is always good for the audio budget!!!!
I might give the AudioContol DQ-61 a look.
