DS18’s ION1600.4D
Road Master
Joined: Oct 2007
Posts: 925
Likes: 56
From: Memphis, TN via NoVA
I ordered the ION 1600.4 from Garage Bagger but they're backordered. So I'm waiting. I'm going to run 4 - 6MR500CF-NDY-4 6.5s in fairing and lowers. 2 - euphoria E5T tweeters in the lower gauge holes. And a pair of Pioneer 6900pro 6x9s in the bag lids. Cicada DSP88V2 to tune it all in. What really sold me on it was @ShoreRider posts in this thread.
https://www.hdforums.com/forum/audio...l#post21680637
https://www.hdforums.com/forum/audio...l#post21680637
If I get a chance this weekend, I'll do a quick recording starting from the bike and walking away to 50-60yds so you can have an idea as to how they sound, within the constraints of cellphone recording quality...lol.
Sponsor
Joined: Apr 2007
Posts: 2,579
Likes: 65
From: Tucson AZ
You guys do realize that it is not possible, even with the very best and most efficient ICs on the market today, for an amp of that size to put out an honest 240w RMS X 4, into a 4-ohm speaker load, at 5, 10 or even 20% THD. Just not possible.
It is probably in the range of 1/2 of that power, into 4-ohms at 1% or less THD.
It is probably in the range of 1/2 of that power, into 4-ohms at 1% or less THD.
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Road Master
Joined: Apr 2021
Posts: 981
Likes: 134
From: Vancouver Canada
You guys do realize that it is not possible, even with the very best and most efficient ICs on the market today, for an amp of that size to put out an honest 240w RMS X 4, into a 4-ohm speaker load, at 5, 10 or even 20% THD. Just not possible.
It is probably in the range of 1/2 of that power, into 4-ohms at 1% or less THD.
It is probably in the range of 1/2 of that power, into 4-ohms at 1% or less THD.
Road Master
Joined: Apr 2021
Posts: 981
Likes: 134
From: Vancouver Canada
Interesting. What about the specs on the Soundigital 1200.4? I tested that amp on my oscilloscope and it gave me above rated power with no clip till around 230w.
Sponsor
Joined: Apr 2007
Posts: 2,579
Likes: 65
From: Tucson AZ
fastsoup,
You cannot test THD % very well with an oscilloscope, but you can test peak voltage, convert that to RMS voltage and then convert that to RMS power, depending upon speaker impedance. AND we will assume that the clipping point for distortion is around 15%+ (obvious to your ears at the lower frequencies).
Take the PEAK voltage that you read with your scope, using a 1000hz TONE CD or audio track, multiply it by .7071 to get the RMS voltage. Then multiply the RMS voltage by itself (square it) and divide by 4, to calculate the RMS power in watts, into a 4-ohm load. and that would be at 10-15% THD. AT that p[rticular frequency, which is standard.
So what was the peak voltage you got, at 1000hz tone, with your scope on the SD1200.4 amp?
You cannot test THD % very well with an oscilloscope, but you can test peak voltage, convert that to RMS voltage and then convert that to RMS power, depending upon speaker impedance. AND we will assume that the clipping point for distortion is around 15%+ (obvious to your ears at the lower frequencies).
Take the PEAK voltage that you read with your scope, using a 1000hz TONE CD or audio track, multiply it by .7071 to get the RMS voltage. Then multiply the RMS voltage by itself (square it) and divide by 4, to calculate the RMS power in watts, into a 4-ohm load. and that would be at 10-15% THD. AT that p[rticular frequency, which is standard.
So what was the peak voltage you got, at 1000hz tone, with your scope on the SD1200.4 amp?
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Road Master
Joined: Apr 2021
Posts: 981
Likes: 134
From: Vancouver Canada
fastsoup,
You cannot test THD % very well with an oscilloscope, but you can test peak voltage, convert that to RMS voltage and then convert that to RMS power, depending upon speaker impedance. AND we will assume that the clipping point for distortion is around 15%+ (obvious to your ears at the lower frequencies).
Take the PEAK voltage that you read with your scope, using a 1000hz TONE CD or audio track, multiply it by .7071 to get the RMS voltage. Then multiply the RMS voltage by itself (square it) and divide by 4, to calculate the RMS power in watts, into a 4-ohm load. and that would be at 10-15% THD. AT that p[rticular frequency, which is standard.
So what was the peak voltage you got, at 1000hz tone, with your scope on the SD1200.4 amp?
You cannot test THD % very well with an oscilloscope, but you can test peak voltage, convert that to RMS voltage and then convert that to RMS power, depending upon speaker impedance. AND we will assume that the clipping point for distortion is around 15%+ (obvious to your ears at the lower frequencies).
Take the PEAK voltage that you read with your scope, using a 1000hz TONE CD or audio track, multiply it by .7071 to get the RMS voltage. Then multiply the RMS voltage by itself (square it) and divide by 4, to calculate the RMS power in watts, into a 4-ohm load. and that would be at 10-15% THD. AT that p[rticular frequency, which is standard.
So what was the peak voltage you got, at 1000hz tone, with your scope on the SD1200.4 amp?
Grand HDF Member
Joined: Aug 2014
Posts: 3,609
Likes: 1,601
From: Eastern Ohio
You guys do realize that it is not possible, even with the very best and most efficient ICs on the market today, for an amp of that size to put out an honest 240w RMS X 4, into a 4-ohm speaker load, at 5, 10 or even 20% THD. Just not possible.
It is probably in the range of 1/2 of that power, into 4-ohms at 1% or less THD.
It is probably in the range of 1/2 of that power, into 4-ohms at 1% or less THD.
https://www.hdforums.com/forum/audio...l#post21680966
I'll trust @ShoreRider opinion on this.