Question 1

What are the dimensions of these speakers L  W   D ??

Accepted Answer

You will find the answer to the size of the speakers if you go to definitives website. In the search on definitives website type 450 and go into the first listing. You will then click on the specs tab about a page down. It will tell you everything you need to know. 13"h x 8 3/16w x 11 7/16d

Question 2

Are the backs of these speakers suitable for using wall mount brackets? solid, and capable of holding their weight? they appear to have fabric wrapped all the way around.

Accepted Answer

The are heavy (20lbs each) and will required mounting on a stud.  They do have adequate wall mounting brackets and hardware.  To get to the mount you have to get under the black mesh.  You can pop off the top lacquer plate and push down the mesh to find the mounting hole.  Also, be aware that they are closed box bass radiators and the cabinets vibrate appreciably more than a ported design so you will have to put some padding up on the wall.  also, play around with which direction to point the radiators.  I ended up having mine with the radiators pointing into the center, but this will depend on room acoustics and what sounds best to you.

Question 3

Anybody running a pair of DT SM450's?  I have a Class "AB" Marantz Integrated Amp and i am looking for more.  I places a pair of 350's in the mix and they work well.  This is a music set up not for DVD's  Thx.

Accepted Answer

My DT's work great for me. I have them hooked up to my entertainment center but i use them mostly for music. I added a 400 watt subwoofer to add some depth to the sound. works great.  I was very pleased at how much sound a small pair of speakers can produce.  However, my big tower speakers fill the room better. No way around it bigger is better.  But when you need to cut down on the size these work very well and the price is right.

Question 4

Has anyone used these a full range surround speakers?

Accepted Answer

These speakers are awesome as surrounds or front as long as you have a sub to fill in the lows, they take a little while to break in so be patient, the longer you play them the better they sound , and they are plenty powerful if you have a good receiver. some of the best speakers I have ever bought.

Question 5

Could anyone advise how these would work with Marantz PM6004? Is the amp powerful enough for these? Many thanks!

Accepted Answer

I am running these as mains at 95 w/ch on Denon AVR-1913.  It seems that the Marantz is rated at 45 w/ch at 8 ohm which may be a bit underwhelming on paper, but I know Marantz rated at 45 w/ch may be misleading and conservative.  Def Tech rates these as minimun input power of 20 w/ch so technically they will definitely work, but you won't get everything out of them.  These were designed to be used with much more power than the Marantz is dishing out, but maybe you could grow into these.  Hope this helps.

Question 6

Can a small, 20 watts per channel amp be used to power these speakers?

Accepted Answer

Yes.  I'm using these speakers with a small class D amp.  The amp is spec'd at 14W per channel @ 8 ohms with 10% THD (Total Harmonic Distortion) and 7W per channel @ 8 ohms with 0.1% THD.  I use the system in a 10 ft x 15 ft room, and it sounds fine when playing music at reasonable volumes.

Question 7

So, which is it? 350 or 450?

Accepted Answer

You get what you pay for

Questions & Answers