in my recent use of my L 2 I have noticed the the bass response has disimproved very noticeably
should say it’s for vocals and acoustic guitar using an octave pedal with my guitar for a bit of low end bass.
at first I thought maybe I was imagining it......done all the usual checks of leads etc
its at the same venue every week so it’s not different room acccoustics etc
there is some bass but not a lot, certainly not the way it had been all along.
the best I can describe it is it now sounds like 802s crossed over with 502 bass bin but without the bass bin connected of which I have previous experience.
The sound from L 2 is not like when the B1 is disconnected but maybe somewhere half way if you can understand what i mean.
my questions are, is the power amp section for B 1 a separate amp and is it possible it’s failing or failed?
i assume that the signal from the T1 via the tone match cable is the whole caboodle and is crossed over at the amplifier / amplifiers
anyone else with this experience or any help please.
Off subject.......is there any type of Bose trade in allowance for perhaps upgrading to the F 1 system.
love my L2s but maybe it’s time to try something new though I fear I might not be able for handling the F 1 as I’m a bit of a crock. But I could try I suppose.
I'm sorry you're having trouble with the bass response from your L1 Model II with B1.
vincentvaughan posted:
hello everyone
in my recent use of my L 2 I have noticed the the bass response has disimproved very noticeably
should say it’s for vocals and acoustic guitar using an octave pedal with my guitar for a bit of low end bass.
at first I thought maybe I was imagining it......done all the usual checks of leads etc
its at the same venue every week so it’s not different room acccoustics etc.
Have you moved the bass module from its regular position in the room? Even a foot or two can make a difference.
there is some bass but not a lot, certainly not the way it had been all along.
Can you hear and feel the bass coming from the bass module?
Do you have anything connected to the L1 Model II Power Stand BASS LINE OUT? This will cause significant change in the bass output. If you don't have anything connected to the BASS LINE OUT, push a 1/4 plug into the jack a couple of times to exercise the connections inside. Then remove the plug.
the best I can describe it is it now sounds like 802s crossed over with 502 bass bin but without the bass bin connected of which I have previous experience.
The sound from L 2 is not like when the B1 is disconnected but maybe somewhere half way if you can understand what i mean.
my questions are, is the power amp section for B 1 a separate amp and is it possible it’s failing or failed?
There is a separate amp for the B1. If it had failed, the power light would probably be red instead of blue.
i assume that the signal from the T1 via the tone match cable is the whole caboodle and is crossed over at the amplifier / amplifiers
Yes, that's correct.
anyone else with this experience or any help please.
You have posted your question in the Ask Bose for Help forum. Community members don't participate here. If you want input from the community, please tell me to move your post to the public area.
Off subject.......is there any type of Bose trade in allowance for perhaps upgrading to the F 1 system.
Bose doesn't do this but you may find an authorized dealer who would.
love my L2s but maybe it’s time to try something new though I fear I might not be able for handling the F 1 as I’m a bit of a crock. But I could try I suppose.
thanks everyone
vincent
If possible, find a Bose dealer who can set them up side-by-side so you can hear the difference.
I haven’t moved the position of the B1.....same stage position every time
cant really hear/ feel the bass anymore.....with my guitar set up I used to be able to produce a nice bass guitar tone similar to upright bass sound from the low E A and D strings.....it now sounds more like picked bass....not nice and certainly not what I was used to.
I have never plugged anything into the bass Line output....it’s never been used.....but i will try your trick with a jack plug to see if it makes a difference
is it possible that it’s simply a wire inside has become disconnected?
the unit is well and truly out of warranty......I am quiet comfortable taking it apart and having a look.....if you can point me towards where in particular I might look......
perhaps it might be no harm to open the topic up to the community to see if anyone else might have a comment so please do move the topic to the public area
It seems unlikely there is something wrong with the B1 or the powerstand. The separate bass subsystem either works, or it doesn't. There isn't a half-way state.
Please connect your guitar directly to the L1 Model II Power Stand analog input. Turn it up. Do you hear and feel sound coming from the B1?
Play some prerecorded music through each of the T1 inputs, one at a time.
had some time today and the use of a second l1 system belonging to a friend so as to AB and swap bits around to try a process of elimination......
all cables were checked with both multimeter and with the system based on they either work or they don’t.
here’s what I found.......with both systems set up in the same room side by side.....inputting the same sound signal ( a drums and bass backing track) to both systems the overall sound was very different.....also played prerecorded music through both.....
the sound from the loaner system was as I would expect the sound from my system was a bit lower in volume and thinner (as if someone had fooled around with eq settings) even though the eq is set identically for both trials.
i tried using 2 B1s with my (troubled) system and found that the bass energy was even less...... I tried it with and with out the pole speakers .
another thing was that though I could hear bass sound coming from the unit it sounded different than from the loaner unit.....reminded me of a powered bass bin I had years ago that the amp was blown in.....it gave a certain amount of sound but not what and the amount it should....
with the volume levels set on my T1 as the would normally for a gig using drum and bass backing track I found that where there was some bass from the unit it wasn’t loud......the loaner unit would rattle the windows in the room.......
occasionally when I’m playing in a venue where I have to stay close to the L1 unit because of space......I sometimes would rest my foot on the B1 for a minute or 2......you can feel the bass energy through your foot from the B1
I tried this today......feel very little in comparison......
as I said in the last post this problem seems to have self healed to an extent though it’s been happening on and off......
any suggestions?
do Bose still run a repair service ?
is it possible to buy a power stand on its own.....even factory refurb?
Thanks for telling us about all your diagnostic tests. Yes, it sounds like the Model II Power Stand will have to be serviced by Bose.
vincentvaughan posted:
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do Bose still run a repair service ?
is it possible to buy a power stand on its own.....even factory refurb?
The Model II Power Stand is still supported (and can be repaired by Bose). Service levels vary by region so it's best to talk to Bose to find out what they can do.
Bose Support UK 44 1634 224 288 Mon - Fri: 09:00-18:30, Sat 09:00-17:00 GMT
vincentvaughan posted:
Forgot to say......
the cooling fan in the troubled unit is quiet noisy comes on and off in time with bass energy pulse....
the loaner unit doesn’t react like this...... if it is.....it’s not audible
thanks
Starting with units manufactured in late 2014 and later (shipped with Firmware version 1.5), the fan now runs quietly, constantly, while the Power Stand is powered on. This is completely normal. In earlier units, the fan would come on when the system was under load.
Because the T1 Master Output is balanced, a splitter like the one above will give you two signals (red and black 1/4 inch (6.3mm) Tip-Sleeve) that have reversed polarities and this will tend to cancel the signal altogether.
You'll get better results taking two signals (Master Output and Aux Output) even though the Aux has no reverb.
I have read all your comment and it turns out that I also have the same problem as you, could you please inform me that how you solved your problem of not listening to the bass, I really appreciate your help.
I'm going to take my power stand to a Bose repair center, taking about gigs, mine have also been canceled, especially here in Miami many people get married at this time, I feel the same thing to get to play again, I have my plan B just in case, good luck and be safe.
