As I understand it, a typical DI does three things -
(a) it converts impedance from high to low
(b) it isolates to remove hum issues
(c) it drops the guitar / pedal signal to make it suitable for a mic level input to handle
I'm looking for something to do (a) and (b) but not (c) - in fact I want the signal to be line level so it can straight to my AD converter. Is the answer here as simple as a 1:2 or 1:4 transformer, or will I need to load either side in series or parallel to get the impedance where it needs to be?
- It is currently Fri Apr 19, 2024 2:01 pm • All times are UTC + 10 hours [ DST ]
line level DI
Moderators: rick, Mark Bassett
10 posts
• Page 1 of 1
line level DI
Chris Preston
The man who gives meaning to the word amateur
The man who gives meaning to the word amateur
-
chrisp - Registered User
- Posts: 162
- Joined: Wed Apr 08, 2015 7:55 pm
- Location: Sunny warm Canberra
Re: line level DI
you can't achieve a and b while maintaining ( or increasing ) level
there is no free lunch
( besides the one's Rick, Gareth and Chris have bought me )
there is no free lunch
( besides the one's Rick, Gareth and Chris have bought me )
-
rob - TRM Endorsed
- Posts: 1011
- Joined: Tue May 10, 2005 9:16 pm
- Location: Adelaide
Re: line level DI
ha!
some DI's (like the tech21 sansamp) has a switchable XLR output which will do either mic or line level.
so this does all 3 but it is active... handiest thing on bass i reckon!
Chris
some DI's (like the tech21 sansamp) has a switchable XLR output which will do either mic or line level.
so this does all 3 but it is active... handiest thing on bass i reckon!
Chris
- Linear
- Frequent Contributor
- Posts: 551
- Joined: Tue May 24, 2005 8:04 am
- Location: Sydney
Re: line level DI
Whatever you use, it will have to be active to achieve what you want.
I use GT Bricks. The Sansamps are great too. Any mic amp with a di will do it though.
Cheers, Paul
I use GT Bricks. The Sansamps are great too. Any mic amp with a di will do it though.
Cheers, Paul
- Paul Maybury
- Frequent Contributor
- Posts: 705
- Joined: Tue Nov 17, 2009 3:07 pm
- Location: Melbourne
Re: line level DI
Cheers guys - I was wondering whether it was possible to avoid the whole 'drop it to mic level and then amp it all the back', but as Rob says there ain't no free lunch. I might knock together a JLM DI and simple BA kit sort of thing then.
Chris Preston
The man who gives meaning to the word amateur
The man who gives meaning to the word amateur
-
chrisp - Registered User
- Posts: 162
- Joined: Wed Apr 08, 2015 7:55 pm
- Location: Sunny warm Canberra
Re: line level DI
chrisp wrote:As I understand it, a typical DI does three things -
(a) it converts impedance from high to low
(b) it isolates to remove hum issues
(c) it drops the guitar / pedal signal to make it suitable for a mic level input to handle
I'm looking for something to do (a) and (b) but not (c) - in fact I want the signal to be line level so it can straight to my AD converter. Is the answer here as simple as a 1:2 or 1:4 transformer, or will I need to load either side in series or parallel to get the impedance where it needs to be?
What AD converter are you using?
Terry Demol
T & L Technical P/L
Audio Design & Service
T & L Technical P/L
Audio Design & Service
- zenelectro
- Registered User
- Posts: 59
- Joined: Mon Jul 19, 2010 1:38 am
- Location: Sydney
Re: line level DI
Apogee Ensemble FW - it has two hi-Z inputs but they parallel mic inputs that I was hoping to use, well, for mics! I was hoping to plug a sort-of DI into one the four line input channels (5-8).
Chris Preston
The man who gives meaning to the word amateur
The man who gives meaning to the word amateur
-
chrisp - Registered User
- Posts: 162
- Joined: Wed Apr 08, 2015 7:55 pm
- Location: Sunny warm Canberra
Re: line level DI
chrisp wrote:Apogee Ensemble FW - it has two hi-Z inputs but they parallel mic inputs that I was hoping to use, well, for mics! I was hoping to plug a sort-of DI into one the four line input channels (5-8).
The Ensemble specs say 2 x 2M ohm Hi Z inputs for inst - this is where gita should go - obviously but the rest are
Mic/Line (usually chip amps) that can cater for anything that will drive the 3k input Z.
All you need is a battery powered buffer box, it should drive the 3k no probs. There are plenty available.
You shouldn't have earth loop probs if gtr effects are battery or isolated PS run.
cheers
Terry Demol
T & L Technical P/L
Audio Design & Service
T & L Technical P/L
Audio Design & Service
- zenelectro
- Registered User
- Posts: 59
- Joined: Mon Jul 19, 2010 1:38 am
- Location: Sydney
Re: line level DI
chrisp wrote:Apogee Ensemble FW - it has two hi-Z inputs but they parallel mic inputs that I was hoping to use, well, for mics! I was hoping to plug a sort-of DI into one the four line input channels (5-8).
The Ensemble specs say 2 x 2M ohm Hi Z inputs for inst - this is where gita should go - obviously but the rest are
Mic/Line (usually chip amps) that can cater for anything that will drive the 3k input Z.
All you need is a battery powered buffer box, it should drive the 3k no probs. There are plenty available.
You shouldn't have earth loop probs if gtr effects are battery or isolated PS run.
cheers
Terry Demol
T & L Technical P/L
Audio Design & Service
T & L Technical P/L
Audio Design & Service
- zenelectro
- Registered User
- Posts: 59
- Joined: Mon Jul 19, 2010 1:38 am
- Location: Sydney
Re: line level DI
Simple solution Terry, thanks - might give that a go first
Chris Preston
The man who gives meaning to the word amateur
The man who gives meaning to the word amateur
-
chrisp - Registered User
- Posts: 162
- Joined: Wed Apr 08, 2015 7:55 pm
- Location: Sunny warm Canberra
10 posts
• Page 1 of 1
Who is online
Users browsing this forum: No registered users and 4 guests