Need amplifier lesson please.....
Thread Starter
Le Mans Master
Joined: Mar 2005
Posts: 7,631
Likes: 11
From: Rocklin California
Need amplifier lesson please.....
I have a Diamond D6 5.2 amp and it has several different settings which I don't understand. I get the gain but how do you set the hi and low pass? I have push buttons for highpass and lowpass on/off, then dials for highpass and lowpass frequency. I also have a separate subsonic for the sub. Below is the best pic I could post. What is a good starting point? I like the subs to be clear and tight without a bunch of distortion or vibration. Mids to have some clean thump, tweeters to be clear for vocals.
Melting Slicks
Joined: Mar 2004
Posts: 2,149
Likes: 6
From: NCCO Oklahoma
I just read the manual on line. The front and rear channels have a fixed 80 hz highpass filter, and the center has a fixed 120 hz highpass filter. The sub channels have a variable subsonic filter and a lowpass filter. (Unless I read it wrong...)
Lowpass/bandpass/highpass filters act like traffic cops. Low frequencies: you go that way... High frequencies, you go the other way... bandpass (between low and high) you go down the middle.
A subsonic filter basically tells the really low frequencies to shut up... because the sub has a point at which the really low frequencies just end up as heat in the voicecoil because the sub cannot reproduce them.
A subsonic filter does wonders for a system with a ported box, as you don't want to try to reproduce frequencies lower than the tuning frequency and unload the driver.
With fixed highpass filters, your only real adjustments will be for the sub. I would start at about 90 hz and dial down from there. The effect you are looking for is to blend the volume levels such that the subs disappear. I find that happens around <80 hz, but your experience may be different.
To set the subsonic filter, turn it to the lowest setting and play some low bass tracks to get an idea of where your natural low frequency cutoff is located. Figure out what volume levels you like to crank to, then adjust the filter upwards to cut out the unusable low frequencies (and probably distortion) and maximize your frequency response. While this is a "crude" method, you are relying on your ears vs. test equipment to get your system setup where you want it.
Let me know if this helps, or if you need additional information. Best regards.
Mark
Lowpass/bandpass/highpass filters act like traffic cops. Low frequencies: you go that way... High frequencies, you go the other way... bandpass (between low and high) you go down the middle.
A subsonic filter basically tells the really low frequencies to shut up... because the sub has a point at which the really low frequencies just end up as heat in the voicecoil because the sub cannot reproduce them.
A subsonic filter does wonders for a system with a ported box, as you don't want to try to reproduce frequencies lower than the tuning frequency and unload the driver.
With fixed highpass filters, your only real adjustments will be for the sub. I would start at about 90 hz and dial down from there. The effect you are looking for is to blend the volume levels such that the subs disappear. I find that happens around <80 hz, but your experience may be different.
To set the subsonic filter, turn it to the lowest setting and play some low bass tracks to get an idea of where your natural low frequency cutoff is located. Figure out what volume levels you like to crank to, then adjust the filter upwards to cut out the unusable low frequencies (and probably distortion) and maximize your frequency response. While this is a "crude" method, you are relying on your ears vs. test equipment to get your system setup where you want it.
Let me know if this helps, or if you need additional information. Best regards.
Mark
Le Mans Master
Joined: Nov 2004
Posts: 8,718
Likes: 20
From: Dyer IN
Cruise-In IX Veteran
since i believe your rear subs are sealed, turn subsonic all the way down or off, and set low pass filter 80hz or maybe a bit higher since they are 8s. You can run a bit of bass boost if you feel the need to. Run the fixed 80hz highpass on the fronts
Thread Starter
Le Mans Master
Joined: Mar 2005
Posts: 7,631
Likes: 11
From: Rocklin California
Yes, the 8" Diamond audio subs are in sealed enclosure also the rear 6.5" Diamond audio coaxials are in sealed enclosure. Front 6.5" and 1" tweeter components are in doors (all Bose speakers removed). I'll try what you said. Thanks!
Thread Starter
Le Mans Master
Joined: Mar 2005
Posts: 7,631
Likes: 11
From: Rocklin California
I just read the manual on line. The front and rear channels have a fixed 80 hz highpass filter, and the center has a fixed 120 hz highpass filter. The sub channels have a variable subsonic filter and a lowpass filter. (Unless I read it wrong...)
Lowpass/bandpass/highpass filters act like traffic cops. Low frequencies: you go that way... High frequencies, you go the other way... bandpass (between low and high) you go down the middle.
A subsonic filter basically tells the really low frequencies to shut up... because the sub has a point at which the really low frequencies just end up as heat in the voicecoil because the sub cannot reproduce them.
A subsonic filter does wonders for a system with a ported box, as you don't want to try to reproduce frequencies lower than the tuning frequency and unload the driver.
With fixed highpass filters, your only real adjustments will be for the sub. I would start at about 90 hz and dial down from there. The effect you are looking for is to blend the volume levels such that the subs disappear. I find that happens around <80 hz, but your experience may be different.
To set the subsonic filter, turn it to the lowest setting and play some low bass tracks to get an idea of where your natural low frequency cutoff is located. Figure out what volume levels you like to crank to, then adjust the filter upwards to cut out the unusable low frequencies (and probably distortion) and maximize your frequency response. While this is a "crude" method, you are relying on your ears vs. test equipment to get your system setup where you want it.
Let me know if this helps, or if you need additional information. Best regards.
Mark
Lowpass/bandpass/highpass filters act like traffic cops. Low frequencies: you go that way... High frequencies, you go the other way... bandpass (between low and high) you go down the middle.
A subsonic filter basically tells the really low frequencies to shut up... because the sub has a point at which the really low frequencies just end up as heat in the voicecoil because the sub cannot reproduce them.
A subsonic filter does wonders for a system with a ported box, as you don't want to try to reproduce frequencies lower than the tuning frequency and unload the driver.
With fixed highpass filters, your only real adjustments will be for the sub. I would start at about 90 hz and dial down from there. The effect you are looking for is to blend the volume levels such that the subs disappear. I find that happens around <80 hz, but your experience may be different.
To set the subsonic filter, turn it to the lowest setting and play some low bass tracks to get an idea of where your natural low frequency cutoff is located. Figure out what volume levels you like to crank to, then adjust the filter upwards to cut out the unusable low frequencies (and probably distortion) and maximize your frequency response. While this is a "crude" method, you are relying on your ears vs. test equipment to get your system setup where you want it.
Let me know if this helps, or if you need additional information. Best regards.
Mark
Thanks, I'm still learning. 
Thread Starter
Le Mans Master
Joined: Mar 2005
Posts: 7,631
Likes: 11
From: Rocklin California
I just read the manual on line. The front and rear channels have a fixed 80 hz highpass filter, and the center has a fixed 120 hz highpass filter. The sub channels have a variable subsonic filter and a lowpass filter. (Unless I read it wrong...)
Lowpass/bandpass/highpass filters act like traffic cops. Low frequencies: you go that way... High frequencies, you go the other way... bandpass (between low and high) you go down the middle.
A subsonic filter basically tells the really low frequencies to shut up... because the sub has a point at which the really low frequencies just end up as heat in the voicecoil because the sub cannot reproduce them.
A subsonic filter does wonders for a system with a ported box, as you don't want to try to reproduce frequencies lower than the tuning frequency and unload the driver.
With fixed highpass filters, your only real adjustments will be for the sub. I would start at about 90 hz and dial down from there. The effect you are looking for is to blend the volume levels such that the subs disappear. I find that happens around <80 hz, but your experience may be different.
To set the subsonic filter, turn it to the lowest setting and play some low bass tracks to get an idea of where your natural low frequency cutoff is located. Figure out what volume levels you like to crank to, then adjust the filter upwards to cut out the unusable low frequencies (and probably distortion) and maximize your frequency response. While this is a "crude" method, you are relying on your ears vs. test equipment to get your system setup where you want it.
Let me know if this helps, or if you need additional information. Best regards.
Mark
Lowpass/bandpass/highpass filters act like traffic cops. Low frequencies: you go that way... High frequencies, you go the other way... bandpass (between low and high) you go down the middle.
A subsonic filter basically tells the really low frequencies to shut up... because the sub has a point at which the really low frequencies just end up as heat in the voicecoil because the sub cannot reproduce them.
A subsonic filter does wonders for a system with a ported box, as you don't want to try to reproduce frequencies lower than the tuning frequency and unload the driver.
With fixed highpass filters, your only real adjustments will be for the sub. I would start at about 90 hz and dial down from there. The effect you are looking for is to blend the volume levels such that the subs disappear. I find that happens around <80 hz, but your experience may be different.
To set the subsonic filter, turn it to the lowest setting and play some low bass tracks to get an idea of where your natural low frequency cutoff is located. Figure out what volume levels you like to crank to, then adjust the filter upwards to cut out the unusable low frequencies (and probably distortion) and maximize your frequency response. While this is a "crude" method, you are relying on your ears vs. test equipment to get your system setup where you want it.
Let me know if this helps, or if you need additional information. Best regards.
Mark
