AKAI GX 747 dBx and no dBx

[authorjim]

Very helpful

The answer to that is not as simple as you might guess.

Yes can can buy external dbx units. But deciding which one to chose is not so easy.

The 747dbx came with dbx Type I NR (the professional version) which I have always felt was a poor choice for a consumer machine due to its extreme dropout sensitivity and extreme sensitivity to the type of HF response roll-off that one experiences at 3.75ips.

If you want a type I unit for the purposes of maintaining compatilbility, then get a DBX 150.

But if you actually intend to use DBX NR, I recommend that you get a DBX 224 series unit (dbx type II NR). These are far less sensitive to drop-outs and HF compression problems that you will have on virtually all consumer machines.

Thank you, this answers alot of questions. It didn't see people more interested in the DBX version of the 747 than the regular version and I think this answers it.

Thanks for the help.

I currently have a standard 747 running through some old but great Crown equipment and with the DBX 224 that I just bought and the DBX 4BX unit to expand the dynamic range, it sounds pretty awesome; atleast to my ears.

I am working a deal on another 747 in black this time and your info has helped alot.

Jim

Any thought on meters, which are more accurate and easier to set the normal VU or the led meters?

Jim

 

[jan_stevns]

...snip......Any thought on meters, which are more accurate and easier to set the normal VU or the led meters?

Jim

Neddle meter have a tendency to be kind of slow, and overshoot a little bit, where led meters are more "on the spot" , but can seem more flimsy unless there are either automatic peak hold, or damping , so it's easier to read them.

having both types it is still not possible to choose, it's just a question of learning to "read" them

 

[guitarsjm]

i could have had TWO of these units today!!

oh my gosh! i went to an estate auction today and the people who HAD this estate, had immigrated from germany during ww2 to escape the nazis.. anyway, they settled here in fla and opened a very lucrative HIGH END audio store/svc center... i have a good background in audio gear and have bought, repaired, svcd, etc. old r-r's and know whats sought after, good, a waste of money, etc.... well, this place was FILLED .. F I L L E D with everything you can think of.. old marantz' nakamichi 700 cassette decks (i almost died seeing this)... turntables of all types, old vintage pioneer, sansui, kyocera... teac r-r's and a few akai's .. one of them was a 747 dbx and there was one other close model to the 747... we went more for the view than to buy as money was short today... but the akais went for only 170!!!!! if i could have written a check... i would have.. cash only today... i know this post doesnt belong here.. but i wanted that damned nakamichi so bad i could taste it! and the akais!! omg.. what sick money they sell for on ebay... i could have funded a few more auctions off of just a couple of the items here... it was seriously... rooms and rooms... stacks and stacks of everything.. i am just venting... just so pissed!

 

[Also Toshiba]

Urban legend or not ?

AKAI GX 747 dBx model sounds better ( rec,play ) than AKAI GX 747 model even when dBx function is OFF .

Data : GX-747 (1982-1983) and GX-747dbx (1983-1984)

The GX-747dbx is just like the GX-747 but it has additional dbx decode/encode pcb's - early DBX 2:1 Type I compression / expansion. The GX-747dbx was not a more expensive version of the GX-747. It was its substitute. Instead of LED bar meters, the GX-747dbx got back the more conventional VU meters. Akai probably had to omit the LED bar meters because the GX-747dbx otherwise would become too expensive with both dbx and LED bar meters in one set . Also the dbx version has glossy rosewood side panels compared to pine woodgrain veneer on regular 747.

 

[Also Toshiba]

Does anyone know what brand and model of reel tape recorder does have an EE feature option?
Please help.

 

[oldvinyldude]

Teac X-1000r has DBX1, Teac X7R has DBX 1, Akai 747 was available as a DBX1 deck, as the thread states. Also Akai G646, and Akai G77. There are likely others, these are just ones I have seen\researched.

 

[Juva]

Esse é exatamente o problema que tive com meu próprio 747. ERA o interruptor de cabeça longa.
Um banho de desoxigenação restaurou todo o brilho do deck.

Pode ser a cabeça, não é inédito. Mas não mexa nos ajustes antes de tentar o interruptor longo primeiro. Eu deixei LOUCO!

O que é esse interruptor? Você tem alguma foto?

Esse é exatamente o problema que tive com meu próprio 747. ERA o interruptor de cabeça longa.
Um banho de desoxigenação restaurou todo o brilho do deck.

Pode ser a cabeça, não é inédito. Mas não mexa nos ajustes antes de tentar o interruptor longo primeiro. Me deixou LOUCO!

 

[Juva]

O que é esse interruptor? Você tem alguma foto?

What is this switch? Do you have any pictures?