JBL GTP4 Imaging Enhancer

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JBL GTP4 Imaging Enhancer

Postby jondee86 » Sun Sep 07, 2014 11:58 am

I have put together a system using a few vintage JBL items that
have been sitting in the shed for a while. There is a 4-channel amp
driving splits in front and DDW6.5's in back. There is a separate
amp driving a small sub. A JBL active crossover high passes the
fronts, low passes the rears, and provides a non-fading output for
the sub. For the moment this is all running off a cheap head unit
with one pair of RCA's.

Now, when considering upgrading the head unit to mechless item,
I discovered to my dismay, that modern head units are 2/3rds
devoted to bluetooth, iPod, video, navigation, indexes, playlists
and phone related BS that is of no use to me. I just want a unit
that plays music as its main purpose in life. Maybe I'll have to see
if I can find something oldschool :)

Anyways, digging into the boxes I found what appears to be a new
and unused JBL GTP4 Imaging Enhancer. Everything is there except
the manual. I was thinking of installing it just for giggles, but I
would like to have a read of the manual before that. It has input
RCA's for front and back channels, but I don't know if it should go
before the crossover or after ?

So if anyone has a .pdf of the manual tucked away, I'd love to get
a copy :)

Cheers... jondee86
1984 AE86 Corolla GT Liftback, NZ new... now with GZE
spec small port, twinscrew s/c and water/methanol injection :)

Watch this space >>> <<<
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jondee86
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Re: JBL GTP4 Imaging Enhancer

Postby jondee86 » Sun Sep 07, 2014 1:22 pm

Or alternatively, I could just get something like this with some time
alignment functionality built-in, and save myself a lot of dicking round ?

Image

These seem like a pretty competent unit for not much money ?

Cheers... jondee86
1984 AE86 Corolla GT Liftback, NZ new... now with GZE
spec small port, twinscrew s/c and water/methanol injection :)

Watch this space >>> <<<
User avatar
jondee86
Toyspeed Member
 
Posts: 903
Joined: Mon Aug 18, 2003 11:08 pm
Location: Wellington

Re: JBL GTP4 Imaging Enhancer

Postby jondee86 » Mon Sep 29, 2014 10:20 am

Found the manual for the GTP4

Turns out this image enhancer is capable of creating a "phantom"
centre channel from a standard stereo signal, plus various other
kinds of sound stage and ambience trickery. Old school cool.

But I have the Sony unit installed now, and the built-in time alignment
does the same job of placing the sound stage in front of the driver.
So it will go back in the box until I can use it on another install.

Cheers... jondee86
1984 AE86 Corolla GT Liftback, NZ new... now with GZE
spec small port, twinscrew s/c and water/methanol injection :)

Watch this space >>> <<<
User avatar
jondee86
Toyspeed Member
 
Posts: 903
Joined: Mon Aug 18, 2003 11:08 pm
Location: Wellington


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