Adjusting a bt355 line leveler
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Road Master
Joined: Aug 2015
Posts: 1,196
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From: Lancaster pa
Adjusting a bt355 line leveler
i know this is a mixed review as far as wether to leave it alone or adjust it for possibly fuller sound. I just got mine back from Mike after sending it in for a static issue. While it was gone I bypassed my amp so I would still have music. Just the 6.5 HU to the hcx 6.5's. While I obviously lost all volume the overall sound was much fuller and actually sounded pretty good. Today I put the LL back in and wire the amp back up. Just as it came back from BT it was noticeably lacking any fullness. I decided to check the output from the LL. The HU was 3 clicks from full, bass+treble flat, and running a 1000hz tone through the USB using my phone. What I found was both sides at .5vac. If I adjusted the gain on the LL all the way up I got 1.9vac. I decided to try 1.5vac on both sides which is about 2 o'clock on the gain. I then set the amp (bridged cv b54) to 24vac. Tested it out and still hollow sounding. So I tried to adjust the hpf on the LL. One of the hpf ***** is VERY sensitive and does add bass to it, the other didn't seem to do anything. The amp is on all pass. My questions are
is there a proper way to set the LL for a richer sound?
is it normal for one hpf **** to be so sensitive and the other to do almost nothing?
the setup is stock 6.5, bridged b54, hcx6.5 on bt brackets. Amp is in 2 channel mode as well. Thanks for any help
is there a proper way to set the LL for a richer sound?
is it normal for one hpf **** to be so sensitive and the other to do almost nothing?
the setup is stock 6.5, bridged b54, hcx6.5 on bt brackets. Amp is in 2 channel mode as well. Thanks for any help
Stellar HDF Member
Joined: Aug 2013
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From: Port Arthur, Texas
yes but it's really hard to get it right. I had mine set really high, I think at one point I was at or over 2 volts out (I posted all my results but no idea how far down their buried). I want to say that around 1.7 volts worked out best for me with a TM400x4 bridged to a set of 602's and the HPF's in the stock location from BT. Amp was set to all pass.
I'm actually about to play around with the HPF on one for the first time, not sure when I'll get to it though but I will be posting results with a CC-1
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Road Master
Joined: Aug 2015
Posts: 1,196
Likes: 106
From: Lancaster pa
yes but it's really hard to get it right. I had mine set really high, I think at one point I was at or over 2 volts out (I posted all my results but no idea how far down their buried). I want to say that around 1.7 volts worked out best for me with a TM400x4 bridged to a set of 602's and the HPF's in the stock location from BT. Amp was set to all pass.
I'm actually about to play around with the HPF on one for the first time, not sure when I'll get to it though but I will be posting results with a CC-1
I'm actually about to play around with the HPF on one for the first time, not sure when I'll get to it though but I will be posting results with a CC-1
Outstanding HDF Member
Joined: Jan 2014
Posts: 2,482
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From: Minnesota
I think the hpf are supposed to be for each side. How is your amp wired on inputs? If you use 2 inputs it mixes when you bridge. On my B54 it seemed if I fed front and rear inputs with the switch on 4 it sounded better and the LL was separate per speaker. I used one side of the LL to front channel, other to rear using y splitters.
Last edited by InthewindMN; Dec 11, 2016 at 08:01 PM.
Thread Starter
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Road Master
Joined: Aug 2015
Posts: 1,196
Likes: 106
From: Lancaster pa
I think the hpf are supposed to be for each side. How is your amp wired on inputs? If you use 2 inputs it mixes when you bridge. On my B54 it seemed if I fed front and rear inputs with the switch on 4 it sounded better and the LL was separate per speaker. I used one side of the LL to front channel, other to rear using y splitters.
Ultimate HDF Member
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From: SW Florida
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Elite HDF Member
Joined: Aug 2008
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From: S. FL
Bunker what are you trying to achieve with the CC-1 and the LL......What setting sounds best or just generally knowing what the LL is set to? I had a CC-1 and ended up never using it. Let's say I used the CC to set it right at 80hz but that wasn't enough lows, I'd then try a lower freq, but ultimately I was picking the setting that sounded best to me. I didn't need a number to let me know that.
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Stellar HDF Member
Joined: Aug 2013
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From: Port Arthur, Texas
Bunker what are you trying to achieve with the CC-1 and the LL......What setting sounds best or just generally knowing what the LL is set to? I had a CC-1 and ended up never using it. Let's say I used the CC to set it right at 80hz but that wasn't enough lows, I'd then try a lower freq, but ultimately I was picking the setting that sounded best to me. I didn't need a number to let me know that.
I want to just play around and see what the numbers look like, it's so much easier with a head unit that you can just adjust as you see fit. If it wasn't so damn easy to navigate through my songs I'd chuck this 4.3 in a heartbeat.
Just trying to solve the impossible, hopefully stumble across something that will elevate my status
Seriously though, just need to have something I can survive until springtime. I just can't leave well enough alone, never could :/