best way to drive comps
Thread Starter
Racer
Joined: Apr 2007
Posts: 351
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From: washougal wash.
best way to drive comps
I'm using a jl 300/4 to drive my pioneer 720's in the doors. Should I give each driver it's own channel or bridge the amp for 150x2? The jl has got built in x-overs and seperate gains which would aid in tuning when running all 4 channels, but would I be loosing volume? I would assume the 150 per side would be divided by the x-overs so the mid would recieve the bulk of the power, so by using the amp as a 4channel, the mids would recieve less overall power right? Would it make an audible difference?
Le Mans Master
Joined: Jun 2004
Posts: 9,289
Likes: 16
From: Skippack PA
St Jude Donor '13
I'm using a jl 300/4 to drive my pioneer 720's in the doors. Should I give each driver it's own channel or bridge the amp for 150x2? The jl has got built in x-overs and seperate gains which would aid in tuning when running all 4 channels, but would I be loosing volume? I would assume the 150 per side would be divided by the x-overs so the mid would recieve the bulk of the power, so by using the amp as a 4channel, the mids would recieve less overall power right? Would it make an audible difference?
Passive crossovers do more than just separate frequencies and unless you really know what you're doing it's likely the system will sound worse and that you'll damage the drivers by bypassing the crossover.
Thread Starter
Racer
Joined: Apr 2007
Posts: 351
Likes: 0
From: washougal wash.
The 720s have the ability on the x-overs to run bi-amped (seperate inputs) so I was planning on using the x-overs in that manner. Setting the hi pass on the amp for the tweeters and tweaking the output would allow me to further tune the pair. I do have an alpine pdx 2x150 that I could also power them with, I'm just not real impressed with the s.q. I didn't realize it was a class d until I'd bought it. To me the jl is warmer and may play louder, it definitely has a different sound. Would it matter if I placed the X-overs back with the amps instead of in the doors? That would allow for some expirementing. Thanks for the input.
Le Mans Master
Joined: Jun 2004
Posts: 9,289
Likes: 16
From: Skippack PA
St Jude Donor '13
The 720s have the ability on the x-overs to run bi-amped (seperate inputs) so I was planning on using the x-overs in that manner. Setting the hi pass on the amp for the tweeters and tweaking the output would allow me to further tune the pair. I do have an alpine pdx 2x150 that I could also power them with, I'm just not real impressed with the s.q. I didn't realize it was a class d until I'd bought it. To me the jl is warmer and may play louder, it definitely has a different sound. Would it matter if I placed the X-overs back with the amps instead of in the doors? That would allow for some expirementing. Thanks for the input.
I agree with you on the PDX sound. I replaced the 4.150 I was using in my vert with an Xtant x604 for exactly that reason.
Pro
Joined: Feb 2007
Posts: 615
Likes: 2
From: Los Angeles Ca.
"Passive crossovers do more than just separate frequencies and unless you really know what you're doing it's likely the system will sound worse and that you'll damage the drivers by bypassing the crossover."
What else do passive x-overs do ?
In what way will it sound worse ?
I have an Audison LRx4.1k driving Dynaudio Esotec System 342 comps.
Ch A is driving the mids and tweets thru the passive x-over and ch B is driving the midbass actively with the lo pass set at 900 htz.
It sounds good, the only concern I have is that the mid bass is rated down to 40 htz and is getting lower (htz) signal than 40.
I talked with the Audison Tech and he said this is the correct way to configure the amp because it is not bridgable. I am looking into installing
another x-over to correct this and would welcome any suggestions.
What else do passive x-overs do ?
In what way will it sound worse ?
I have an Audison LRx4.1k driving Dynaudio Esotec System 342 comps.
Ch A is driving the mids and tweets thru the passive x-over and ch B is driving the midbass actively with the lo pass set at 900 htz.
It sounds good, the only concern I have is that the mid bass is rated down to 40 htz and is getting lower (htz) signal than 40.
I talked with the Audison Tech and he said this is the correct way to configure the amp because it is not bridgable. I am looking into installing
another x-over to correct this and would welcome any suggestions.
