My Audio System (for the time being...)

**Benatti** · 07-13-2008, 05:04 PM

Hi Friends,

I would like to present here my Audio System.

My loudspeakers consists, each one, for:

- 12" JBL-D123 speaker, for the mid-bass/bass, installed in a sealed cabinet. I opted for use the JBL D-123 because I needed, in my boxes of horns, of a speaker of high sensitivity to accompany the high sensitivity from the mid and treble drivers, and at the same time I had an excellent response of mid-bass/bass.

- JBL 2426J compression driver coupled to a horn of aluminium cast as a model similar to that used in the box JBL Paragon, for the midrange.
- Selenium D220Ti compression driver coupled to a horn injection molded reinforced high-density solid polyurethane Selenium HM11-25, used for the treble.

In the black box located behind driver of treble, are the responsible passive components for the alignment and interlacement between the drivers/speaker meet.

My system is bi-amplified.

The sources (CDTransport Theta Pearl/DAC Theta Chroma and turntable Thorens TD-126 MKII/SME-3009R/Ortofon MC-20 Super MKII/Former Audio Note AN-S4II) are connected to a DIY tubes pre-amplifier, which in turn sends the signal to an active DIY 2 way crossover .

This crossover separates bass and subbass, (and also adjust its cutting and intensity using 2 pots) and send this signal to a Sony TAN-5550 solid state power that feeds a sealed subwoofer Dahlquist DQ-1w, 12". The subwoofer Dahlquist it is over there in the back from room, on photo where appears only the loudspeaker.

The other part of the crossover frequencies to send a DIY pure triode power amplifier made especially by myself in order to drive this kind of speakers. All technical characteristics of this power, mainly damping, were carefully designed and prepared to exploit the maximum yield of these compression drivers/horns-speaker.

The final result is a very clean sound, much balanced tone, very dynamic and with highest resolution.

Victório Benatti

**Doc Mark** · 07-13-2008, 08:17 PM

Hello, Victorio,

That's a very interesting and nice system you have there, Sir! Looks great, and I'll get it sounds great, too. How is the bass response from those D123's? Also, how rare is it to have such a nice stereo system down in Brazil? Are there quite a few audiophiles down that way, such as yourself? Very nice to see how you put it all together, and thanks for sharing it with us. Take care, and God Bless!

Every Good Wish,
Doc

P.S. I just re-read your post, and see that you are using a subwoofer! Sorry, I missed that, first time around.

**Benatti** · 07-14-2008, 11:16 AM

Hello Doc,

The bass and the mid-bass response from those D123's are the best that I listen until today. Never I listen in any system, either of that price will be, response so articulated, smooth and rigid equal to that of the D123's.

It is essential that "emendation and interlacement" between the D123 and drivers/sub they are perfect so that they all show to its enormous potential and qualities, not only in bass/mid-bass as well as in mid and mid-hi, therefore it frequency response is 30-15,000 hz.

Victório Benatti

**BMWCCA** · 07-14-2008, 01:25 PM

Guess I'd better rescue my D123s from the closet. I was gonna use them for a guitar amp after hearing Harvey praise them for that application. Before this i figured they were only a compromise speaker designed to fit in an in-wall installation between the studs with a minimal depth requirement. I still think of them that way, but at least someone has a high opinion of them.

Nice work!