Need some helpon some speakers
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6th Gear
Joined: Jun 2009
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From: Massachusetts
Need some helpon some speakers
I have a set of MB QUART QSD 216 2-way high-end component system with 6.5, tweeters and two crossovers. I would love to use these on my 09 street glide but dont know if I can get an amp that will work with the motorcycles system but be powerfull enought for the speakers. They are power hungry..Please help
Road Master
Joined: Jun 2009
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if I remember right MB Quarts are efficient but have high power handling capability. You dont have to run 300 watts per channel to get them loud.
at most you need is 100 watts per channel, and make it a good amp that delivers the 100. Not a pyramid, kraco, VR3 amp. Like rockford, alpine, MTX, kenwood,, something that delivers the promise of power. Low distortion figures are a must. like better than .05%
at most you need is 100 watts per channel, and make it a good amp that delivers the 100. Not a pyramid, kraco, VR3 amp. Like rockford, alpine, MTX, kenwood,, something that delivers the promise of power. Low distortion figures are a must. like better than .05%
Last edited by Johnnyiroc; Aug 26, 2009 at 07:20 PM.
Road Master
Joined: Jun 2009
Posts: 1,117
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You need to find the maximum output of your charging system and add the load of the bike with the lighting on and all the accessories while running. Most touring harleys with radios have more than enough electricity availiable to run a couple hundred watts, not really needed, 100 should be fine.
assuming an amp is fused at 5 amps...if it is 100% efficient (i bet it aint) it wont put out more than 70 watts before the fuse blows.
My 50 watt amp is fused at 5 amps, so you know it has to draw less than 5 to sustain the fuse. Thats less than your 55 watt headlight.
Another thing amps only pull that heavy amperage for a split second when there is a bass note or low frequency sound. thats why subwoofers are fed with huge amps and tweeters need much less power.
100 watts would be just dandy. It will run 4 speakers just fine.
here is an Orion, a great amp, under $100 at Crutchfield.com
- 2-channel car amplifier
- 60 watts RMS x 2 at 4 ohms (80 watts RMS x 2 at 2 ohms)
- fused at 25 amps.
Road Master
Joined: Jun 2009
Posts: 1,117
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here is one of my bikes with 3 1/2 inch infinity reference 3022 speakers. I would have went bigger, but there is no room.
95db 1w/1m
50 x 2 amp under the seat next to battery.
Electronic crossover under right side cover.
Loud enough to hear with a full face helmet on at 85.
Good crisp sound, lacks a little bass due to small tiny speaker size.
Sound from my mp3 player!
95db 1w/1m
50 x 2 amp under the seat next to battery.
Electronic crossover under right side cover.
Loud enough to hear with a full face helmet on at 85.
Good crisp sound, lacks a little bass due to small tiny speaker size.
Sound from my mp3 player!
Road Master
Joined: Jun 2009
Posts: 1,117
Likes: 5
You dont have to run them at 150 w rms, thats just the recommended amp rating for maximum sound performance. When you operate your radio at 1/4 volume, you are well under that 150 rms. more like 15 watts. 150 watts is a crap load of power and would make your radio be heard for a mile behind you.
How often will you run the radio wide open? You can still use your speakers. Those speakers will out perform most other speakers only using 100 watts, while the lesser speakers may be operating at 150+ to get the same volume.
Lower power means longer life too. Use em anyway.
How often will you run the radio wide open? You can still use your speakers. Those speakers will out perform most other speakers only using 100 watts, while the lesser speakers may be operating at 150+ to get the same volume.
Lower power means longer life too. Use em anyway.
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