I don't own a TS590, but I'll talk about question 2 anyway.
Digital signal processing is used for many functions in modern receivers and 
transmitters.  Not just noise reduction.  In the TS480, DSP was used for 
filtering, notching and/or noise reduction on the demodulated audio signal. 
In the 480 you needed to have a crystal filter at the intermediate 
frequency; if you set the bandwidth narrower than that filter, strong 
signals might still pump the AGC and desensitize the receiver.  I don't know 
how they did this in the TS2000.
In the Yaesu transceivers since the FTDX9000, including the FT450 and the 
FT950 that I use, you have a "roofing filter" after the first mixer, and you 
do most of the filtering digitally at an IF of 30 KHz.  You can adjust the 
receive bandwidth from 50 Hz on some radios on CW up to 4 KHz for SSB. 
Since a DSP chip is doing the calculations, you don't have to pay for 
several different crystal filters, as you would with a K3.  In addition to 
noise reduction, noise blanking and filtering, DSP is used for AGC and for 
generation of SSB and AM on transmit, as well as speech processing and audio 
equalization.  You can run all these rigs with the noise reduction turned 
off, or set the amount of noise reduction you want.
When I worked for Collins Radio from 1969 to 1971, I was in an engineering 
group that did VHF receiver front end design.  Things have changed 
drastically since that era.
73,

Lloyd Rasmussen, W3IUU, Kensington, MD
http://lras.home.sprynet.com
-----Original Message----- 
From: Scott Gillen
Sent: Tuesday, December 30, 2014 6:09 PM
To: [log in to unmask]
Subject: Kenwood 590?

A few questions for 590 users.=20

1. What is the receiver like?  Being clear out in ZL I think a good 
receiver=
will be important. Think the last
Radio I had was a ts450 about 15 years ago.=20

2. What are  the DSP filters like.  I've never herd a DSP filter. I'm not a 
b=
ig fan of to much noise reduction. The old radios I had made it sound 
unnatu=
ral. I'm in a city of aprox 1Million and I don't know how much man maid 
nois=
e I will have.=20

3. Does it have a removable front panel?  There may be times I want to 
liste=
n from a location other than my shack.=20

I've only owned Kenwoods over the years but would listen to other 
suggestion=
s.  Speech is nice but not a necessity. I prefer bright digits on a dark 
bac=
kground but it appears the displays have gone away from that for the most 
pa=
rt.=20

I'lll be running SSB and perhaps digital but mostly SSB.=20

73
Scott
ZL1CHM / N0HOJ
Auckland New Zealand

Sent from my iPhone=