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Double Bass ehrlund contact pu-mike

I'm curious - where did you mount the EAP on the bass for the test you did? I have been using one for a couple months now and experimenting with various positions. The differences in sound from one placement to another are shocking! Overall I have to agree - the thing sounds just great. So far I think my favorite place is just below the bass side bridge foot.

I'm also interested in your lack of feedback. I've been having really big feedback problems - even at quite low volume levels. I have put a 3 band parametric eq in line to try to bring it under control, which has helped, but really not enough.

I was recently given the suggestion, regarding the feedback, that I may not be pressing it firmly enough against the top when I mount it. Anyone else have that experience?

If memory serves... The EAP was mounted on the treble side, an inch or two below the bridge and maybe just over an inch from the f hole. I think it was pressed fairly close to the top - I don't recall seeing a great deal of space underneath it.

What kind of feedback are you getting? Low, mid or high pitched? And what amp/speakers have you tried it with?

I'm hoping my EAP will arrive in the mail tomorrow and I'll be able to see if it works as well on my bass as it did on Laurence's.

Rick
 
I'm curious - where did you mount the EAP on the bass for the test you did? I have been using one for a couple months now and experimenting with various positions. The differences in sound from one placement to another are shocking! Overall I have to agree - the thing sounds just great. So far I think my favorite place is just below the bass side bridge foot.

I'm also interested in your lack of feedback. I've been having really big feedback problems - even at quite low volume levels. I have put a 3 band parametric eq in line to try to bring it under control, which has helped, but really not enough.

I was recently given the suggestion, regarding the feedback, that I may not be pressing it firmly enough against the top when I mount it. Anyone else have that experience?

mine is positioned just below and to the outside of the E string side bridge foot. i tried a few other positions too. i don't think one can generalize here, each bass will have its own sweet spot for the ehrlund.

but it would be interesting to hear how you solve your feedback problem. i haven't had any feedback with it.
 
My Ehrlund Acoustic Pickup arrived this morning. :) I ordered it directly from Goran along with a preamp too. It seems to be working well for me... I have had no feedback issues (I was getting worried by quenoil's post!)

I think I feel a long post coming on.. so do feel free to read something else instead. I am a better sound / recording engineer than I am a bass player, so my ears are well trained at listening and fine tuning sounds.

Here's what my experiences have been so far:

I've tried it in three positions and I used headphones to listen:
1 - about 4 inches south of G foot, and towards f hole
2 - about 4 inches south of E foot, and towards f hole
3 - a few inches from E side edge of the top, at about half the height of the TP (hard to explain!)

Results:
1 - I liked it.. bass warmth + strings + body sound
2 - Almost same as 1) slightly warmer perhaps, apart from what I might describe as an "echo bass resonance" - it started shortly after a plucked note and stopped just before the note died away. I don't know what it was - something inside the bass resonating. (the bass bar?? is it glued to the top usually??)
3 - A very woody sound, lots more body and less low end.

I decided to move it back to position 1) for the time being.

I will echo Bill and Rich when I say the Ehrlund is very very sensitive - by that I mean that it will pick up the sounds of anything touching the bass top - fingers on strings, slapping, any sort of accidental fumbling or bad technique (my speciality :eek: ), buttons on shirts.. that sort of thing. The whole bass seems to behave like the diaphragm of a mic - and all the high frequencies come through in astonishing detail. As I have been using a Realist for a number of years it is like a breath of fresh air!

I also tried using the EAP with a different preamp; an Award Session AP10 which I have on long term loan from a friend. The EAP worked very well with this preamp too... but... there was a buzz. Sounded like a mechanical buzz - something rattling... I tracked it down to... The Realist!!??!! Huh??? ..... (it wasn't even plugged in.. What??)... What I could hear was the copper foil round the edges of the Realist that extend past the E foot rattling against the bass top! I swapped back to the Ehrlund preamp and the noise was virtually gone, although now I knew what I was listening for I could just about make it out. I swapped back to the AP10 and the buzz came back. I tried putting a bit of blue tack at the corners and that almost cured it - but I couldn't get the tack underneath properly. I think I need to remove the Realist and refit it with extremely tiny blobs of tack at the exposed edges.

This buzz / lack of buzz leads me to suspect that Ehrlund's preamp might have some kind of low pass filter that removes these super high frequencies. I will need to make some recordings and listen back on my monitor speakers to find out for sure.

Using Ehrlund's preamp I then plugged the EAP into Ch1 of my EA Doubler with the Realist into Ch2. My bass is a Romanian 3/4 flatback, about 35 - 40 years old and it's sound is... hmmm.... it speaks very well in the midrange shall we say! It does have a lovely voice acoustically, especially when I manage to get the bow to work properly, but it doesn't have a great deal of ultra low warmth (I noticed this when I compared it to Laurence's 7/8 bass last week)..... Anyways.. the sound with the EAP... I would say basically the same results as reported with Laurence's bass last week. The midrange is forward, but this can be brought into check by using the doubler's mid EQ. Through the amp I really did like to blend in some Realist to enhance the low end. Especially as my DB is a bit thin acoustically. I tried the bow, and IMO the Ehrlund's top super defined top end response did make my bowing sound a bit scratchy - when the EAP was used by itself. Moving the EAP to a different place would probably reduce the scratchiness - where it currently is: by the G foot, is probably the worst place it could be. But blended with the Realist it sounded spot on, the two signals worked so well together. Bowing didn't sound scratchy when blended. Pizz sounded great.

Swapping between the inputs on the Doubler seemed like this to me:
Ch1) Mid driver and tweeter (Ehrlund)
Ch2) Bass driver (Realist)
Ch1+2) - A full range speaker

That's the best way I can describe it. I don't mean to do the Ehrlund's bass reponse down.. on headphones it sounds great, but through an amp I don't think you can can beat the low end thump of the Realist.

I must retire now.. phew that was an exhausting post. I hope somebody finds it useful. ;)

Rick

EDIT:
AFter a day or two I'm loving the bass end of the Ehrlund through my amp. I like it better than the Realist. I have a Jump Jive Jazz gig tonight so I will be able to test the setup out properly
 
If memory serves... The EAP was mounted on the treble side, an inch or two below the bridge and maybe just over an inch from the f hole. I think it was pressed fairly close to the top - I don't recall seeing a great deal of space underneath it.

What kind of feedback are you getting? Low, mid or high pitched? And what amp/speakers have you tried it with?

I'm hoping my EAP will arrive in the mail tomorrow and I'll be able to see if it works as well on my bass as it did on Laurence's.

Rick

The placements you're describing are pretty similar to ones I've experimented with.

The feed back I'm getting is quite low - the open D seems to set it off the most.

My setup is:

EAP into the Ehlund pre into a presonus 3-band parametric eq into a Yamaha powered speaker cabinet (MSR400).

I haven't had time to mess with it since my last post - I 'm curious what I must be doing wrong since no one else is having these issues... I'll try pressing it very tight to the top tomorrow when I get set up and see what happens. That was the suggestion from Gerold Genssler who sold me the pickup and pre.

BTW - I have to issue some kudos to Goran who emailed me immediately after I posted last time to check in about what was happening with my set up and help me resolve the issues.
 
The placements you're describing are pretty similar to ones I've experimented with.

The feed back I'm getting is quite low - the open D seems to set it off the most.

My setup is:

EAP into the Ehlund pre into a presonus 3-band parametric eq into a Yamaha powered speaker cabinet (MSR400).

I haven't had time to mess with it since my last post - I 'm curious what I must be doing wrong since no one else is having these issues... I'll try pressing it very tight to the top tomorrow when I get set up and see what happens. That was the suggestion from Gerold Genssler who sold me the pickup and pre.

BTW - I have to issue some kudos to Goran who emailed me immediately after I posted last time to check in about what was happening with my set up and help me resolve the issues.

Have you tried using a High Pass Filter? (is there one on the presonus?) I used to get terrible low end feedback from my Realist, especially on my D string, before I started using the Doubler with it's built in HPF. The Fishman Pro Preamp has a HPF, as does F-Deck's HF-Pre.

Rick
 
Have you tried using a High Pass Filter? (is there one on the presonus?) I used to get terrible low end feedback from my Realist, especially on my D string, before I started using the Doubler with it's built in HPF. The Fishman Pro Preamp has a HPF, as does F-Deck's HF-Pre.

Rick

There is an HPF, but it's all the way up at 80hz and not sweepable. 80 is just too high - it cuts way too much of what I need. And from what I can tell much of the feedback is coming at somewhat higher frequencies..

thanks for the tip though!
 
A little follow up: played with the EAP tonight and it was splendid. It appears that I am a wimp and was not pressing it to the top firmly enough when mounting it. I gave it a little extra oomph tonight and.... presto chango.

It was easily the best amplified sound I've had yet - I rolled off a little at around 120 and a little at around 1k. Sound was warm, present, and super accurate. Hooray for the EAP.
 
Well I only had about an hour to mess with it so far. Ran it through both my Flightcase 150 and AI Focus SA & Wizzy 10. What to say...

Well I kinda had trouble I guess of maybe the good variety. The sound was so transparent, I couldn't tell how loud I was getting until I knew I was pretty loud. With the Flightcase with the upward firing speaker I kept taking double takes trying to figure out if I wasn't getting any output, or simply that it duplicated the acoustic sound so well (yes like a mic) that I was swimming in my basses sound. Balance is really determined where you place it. Too far it gets muddy, too close to the bridge and you lose bottom and certain areas (like around the G octave on G string) start to resonate too much. I ended up very much like William's pic from a few pages back. About 5" below E foot, and slightly toward F hole.

I think the only way to hear what it's reproducing is simply to run it through to headphones. Other pickups, you can tell you're being amplified. This one... even with the Wizzy firing at my feet... at first you can hear what's coming out and then after a while my ears start playing tricks on me again. Is it on or is it too transparent?

Just for a few minutes I plugged in a mic (H-Clamp & EV Cardinal -> DTar Solstice) just to see the difference. I sorta found my mic spot a few weeks back and just to compare... the mic has a bit of punch the Ehrlund doesn't, but the bottom is slightly better with the Ehrlund. It's pretty close tho. You probably couldn't tell after playing for 5 minutes.

Another tiny annoying thing is that the 1/4" female jack that was installed had a bit of wire spring coming out the cable end to protect the cable. Play loud enough and the spring would rattle so I taped it down. Other than that I've been dealing with alot of hum coming from my setups and I don't think it's due to the Ehrlund as I was having it with the BP-100 I was using. Only the FC didn't have that issue so I'm considering running a copper cable through all the ball ends just to help ground it further. It's probably something with my house and the wall outlets probably need to be grounded better. Yeah it can be pretty sensitive, but I never really turned up super loud as the hum got a bit distracting. Tapping the cable isn't so bad... IMO, it's about as sensitive as the Dyn-B when it comes to touching it.

So yeah, transparent, natural, and woody as your bass can produce. This one might be a winner, if you're into the transparent sound.
 
A little follow up: played with the EAP tonight and it was splendid. It appears that I am a wimp and was not pressing it to the top firmly enough when mounting it. I gave it a little extra oomph tonight and.... presto chango.

It was easily the best amplified sound I've had yet - I rolled off a little at around 120 and a little at around 1k. Sound was warm, present, and super accurate. Hooray for the EAP.

This actually triggered an order for the Ehrlund pickup, can't wait even though I am happy with my Full Circle. I plan also to use it occasionly on my Martin D-18.....:bassist:
 
Has anyone had any dealings with or ordered the Ehrlund from this distributor? It would be nice to be able to buy it in the U.S. . However, Jonas is such a great person to deal with, I was wondering what the pro's (or con's) of buying the pickup from him vs Front End Audio would be? There's the obvious issue of price, but I'd also want someone to back it up, if some kind of unforseen issue occured.


Ric

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I bought mine from Front End. I posted earlier that they will ask you which connector you want on the end of the cable - to which I chose a 1/4" female so I can use it with any standard cable. And while they were at it, I had them shorten the cable so I didn't have to do it myself. They were pretty nice and I received the pickup a week later. No problems here.
 
Hi Quenoil

Are you using the Erhlund straight into the Presonus 3 band EQ or are you running it into the Erhlund pre first, I have an RCF 312A on demo want to try that as a set-up.

Cheers

Laurence

Hi Laurence - I'm running into the Ehrlund pre first. Let me know how you like the RCF. I've been really happy with my Yamaha, but you know... always curious :)


i gotta say, i don't get the value of the presonus eq in this context, unless you're trying to dial out some really nasty resonance ... it's a very flexible box, but it's also very easy to misuse.

Not quite sure why you "gotta say" that, but ok. It is flexible, but unfortunately not in some ways that would be very important to me. It serves its purpose though, which is to be the only source of eq in my amplification chain.
 
Hi Quenoil

I used the Erhlund in to a Markbass CMD15P combo and though there is loads of volume for me the eq on the amp and the voicing of the speaker doesn't do the Erhlund justice I get too much boom even with bass rolled all the way off. I plugged the Erlund with the pre-amp straight in the RCF and sounded like a dream, I was hoping that the presonus would give me more volume and eq options (depending on the room and who;s in the band) it may even help with the Markbass combo what's your experience with it.

Cheers

Laurence
 
Hi Quenoil

I used the Erhlund in to a Markbass CMD15P combo and though there is loads of volume for me the eq on the amp and the voicing of the speaker doesn't do the Erhlund justice I get too much boom even with bass rolled all the way off. I plugged the Erlund with the pre-amp straight in the RCF and sounded like a dream, I was hoping that the presonus would give me more volume and eq options (depending on the room and who;s in the band) it may even help with the Markbass combo what's your experience with it.

Cheers

Laurence

That makes sense to me - I think the Ehrlund is really designed to be used with a full spectrum amp/speaker like the RCF, not something voiced particularly for bass (although oddly enough my EAP sounds amazing through my friend's half-broken Crate bass amp. ha!). The presonus is the only inexpensive small parametric eq that I could find out there, so I picked it up. Turns out that it works pretty well - I wish there were more overlap between the three bands but that's really my only complaint. The output from the presonus will actually be a little lower than the output direct from the Ehrlund pre, but that hasn't been a problem for me. It is effective for reigning in frequencies that are out of control or for a little tonal shaping too.

Good luck - let me know how it shakes out.
 
Just a quick thing- I think it's rather cool that, by means of forum activity, a great product moves from nobody-knows-nobody-uses-obscurity to a serious player in the pickup game. And that we as forum readers are witnessing this- I wonder what Göran Ehrlund thinks...

Best

Sidecar

and- oh yes, I have to try it soon. Still on the dyn-b, if any at all, but the Ehrlund actually seems to be what I was looking for in the dyn-b.