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A very, very common question. Let's start with some definitions.
Low pass crossover: this circuit takes in all the audio frequencies and only lets the low ones "pass" through, eliminating the higher frequencies.
High pass crossover: you guessed it - takes in all the audio frequencies and only lets the high ones "pass" through, eliminating the lower frequencies.
Usually you want the low and high pass crossovers at the same setting (say, 80 Hz), but this is not an absolute law - you will want to adjust these to how they sound best through trial and error.
To get your DLS-R to play bass, it needs input. This can come from several sources:
1. Your receiver or processor. This is usually how it works. Your receiver probably has a feature that splits the audio frequencies and provides just the low frequencies to the subwoofer (a low pass crossover). There is usually a jack on the back of the receiver called "LFE" - stands for Low Frequency Effects. This low pass croossover is adjusted using your receiver. You'll notice an "LFE" jack on the back of the subwoofer - just connect these up. If this is how you intend to hook up, use the "subwoofer direct" setting on the sub's crossover knob - because all the crossover needs have been satisfied by the receiver and you don't need the sub's built in low pass crossover. The settings for your JBLs are also controlled by the receiver in this case. Play with the low pass and high pass settings until they sound best.
2. All you have are speakers with speaker wire running to them - you don't have any LFE or other such features on your receiver. In this case, take the front left and front right speaker leads and connect them to the input speaker terminals on the sub from your receiver. Then connect another set from the output jacks of the sub to the speakers. The subwoofer will apply a low pass crossover and take the bass it needs to play, adjusted by the crossover knob on the back panel. The main speakers will get the rest of the frequencies, set at either 80 or 100 Hz. based on the switch on the sub's back panel. Play with these two settings until it sounds best.
3. You have separate pre amp and amplifier components, or your have a receiver with pre-out. This is the rarest setup. In this case, take the output from the preamp and feed it into the L and R input on the sub. Take the output from the sub and feed it back to the amplifier or pre-in jacks. Note you need four RCA cables to do this. The crossovers are then set as in scenario two.
Hope this helps, and good luck!
Bruce
| Originally posted by Bassmaster I just purchased a Velodyne DLS-3750R and I need setup help. I am very new and learning. I currently have JBL In-Walls setup on my system a 80HZ. I don't know what some of the items mean on my sub and what they should be set at. Should I set my Low-Pass Crossover at 80HZ since the speakers are set at 80HZ? Should I set the High-Pass Crossover at 80HZ or 100HZ and what is the difference between High and Low? Thanks in advance. |
Low pass crossover: this circuit takes in all the audio frequencies and only lets the low ones "pass" through, eliminating the higher frequencies.
High pass crossover: you guessed it - takes in all the audio frequencies and only lets the high ones "pass" through, eliminating the lower frequencies.
Usually you want the low and high pass crossovers at the same setting (say, 80 Hz), but this is not an absolute law - you will want to adjust these to how they sound best through trial and error.
To get your DLS-R to play bass, it needs input. This can come from several sources:
1. Your receiver or processor. This is usually how it works. Your receiver probably has a feature that splits the audio frequencies and provides just the low frequencies to the subwoofer (a low pass crossover). There is usually a jack on the back of the receiver called "LFE" - stands for Low Frequency Effects. This low pass croossover is adjusted using your receiver. You'll notice an "LFE" jack on the back of the subwoofer - just connect these up. If this is how you intend to hook up, use the "subwoofer direct" setting on the sub's crossover knob - because all the crossover needs have been satisfied by the receiver and you don't need the sub's built in low pass crossover. The settings for your JBLs are also controlled by the receiver in this case. Play with the low pass and high pass settings until they sound best.
2. All you have are speakers with speaker wire running to them - you don't have any LFE or other such features on your receiver. In this case, take the front left and front right speaker leads and connect them to the input speaker terminals on the sub from your receiver. Then connect another set from the output jacks of the sub to the speakers. The subwoofer will apply a low pass crossover and take the bass it needs to play, adjusted by the crossover knob on the back panel. The main speakers will get the rest of the frequencies, set at either 80 or 100 Hz. based on the switch on the sub's back panel. Play with these two settings until it sounds best.
3. You have separate pre amp and amplifier components, or your have a receiver with pre-out. This is the rarest setup. In this case, take the output from the preamp and feed it into the L and R input on the sub. Take the output from the sub and feed it back to the amplifier or pre-in jacks. Note you need four RCA cables to do this. The crossovers are then set as in scenario two.
Hope this helps, and good luck!
Bruce
